Foreword
This document is drafted in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents".
This document replaces JC/T 507-2012 "Terrazzo for Building Decoration", compared with JC/T507-2012, in addition to structural adjustment and editorial changes, the main technical changes are as follows:
a) Some normative references have been added (see Chapter 2);
b) added terms and definitions for high-performance terrazzo, high-performance cement engineered stone, crystalline terrazzo, dimensional stability (see 3.3, 3.5, 3.9 and 3.16);
c) According to the classification of flexural strength and water absorption, high-performance terrazzo and high-performance cement artificial stone are added (see 4.1.1);
d) changed the classification of the surface effect of the product (see 4.1.5, 4.1.5 in the 2012 version);
e) Changes to the common specifications and dimensions of prefabricated terrazzo (see Table 1, Table 1 for the 2012 edition);
f) Added examples of marking of resin-cementitious high-performance grinding stones (see 4.3);
g) changed the requirements for cement quality (see 5.1, 5.1 in the 2012 edition);
h) the addition of provisions on concrete admixture requirements (see 5.7);
i) added requirements for admixtures and fibers (see 5.8 and 5.11);
j) The appearance quality requirements of high-performance terrazzo and high-performance cement artificial stone have been added (see Table 2 and Table 3);
k) changed the technical requirements for dimensional deviations (see Tables 4 and 5, Table 4 of the 2012 edition);
1) Increased requirements for terrazzo dimensional stability (see 6.3);
m) the requirement for the coefficient of linear thermal expansion of terrazzo has been increased (see 6.4);
n) changed the requirements for terrazzo gloss and adjusted gloss to a functional item (see 6.5.2, 6.3.2 in the 2012 version);
o) Added the stipulation that the performance of other applications of terrazzo should meet the design requirements (see 6.5.8);
p) the addition of test method regulations for the dimensional stability of terrazzo (see 7.4);
q) Factory inspection items to increase water absorption (see 8.1.1);
r) Type test items to increase dimensional stability (see 8.1.2);
s) added provisions for the determination of water absorption rate (see 8.4.1.3);
t) Added provisions for dimensional stability determination (see 8.4.2.4);
u) the provision for determining the coefficient of linear thermal expansion has been added (see 8.4.2.5);
v) Appendices B, Appendix C and Appendix D of the original standard have been deleted, and the relevant methods are directly referenced from the current standard.
Please note that some of the contents of this document may relate to patents. The issuer of this document assumes no responsibility for identifying patents.
This document is proposed by the China Building Materials Federation.
This document is under the supervision of the National Technical Committee for Standardization of Cement Products (SAC/TC 197).
The drafting unit of this document: Suzhou Concrete and Cement Products Research Institute Co., Ltd., Yangzhou University, Suzhou Concrete and Cement Products Research Institute Testing Center Co., Ltd., Huixian Hongyuan Building Materials Co., Ltd., Suzhou Dianyue New Building Materials Co., Ltd., Ningbo Shike New Material Technology Co., Ltd., Sichuan Lida Building Materials Technology Co., Ltd., Beijing Dagu Building Technology Development Co., Ltd., Anhui Bulgari New Decoration Materials Technology Co., Ltd., Guangdong Gaitqi New Material Technology Co., Ltd., Shanghai Duoyi New Material Technology Co., Ltd., Fujian Pengxiang Industrial Co., Ltd., CIMC Green Building Environmental Protection New Materials (Lianyungang) Co., Ltd., Yunfu Haoye Material Technology Co., Ltd., Fujian Quanzhou Nanxing Marble Co., Ltd., Shandong Hefeng Group Co., Ltd., Shanghai Houxiang New Material Technology Co., Ltd.
The main drafters of this document: Tan Yongquan, Yang Dingyi, Luo Jingjing, Yu Feng, Wang Tianqi, Shi Xueli, Han Shiguang, Guo Junjian, Ru Zonglin, Wang Qingping, Lei Yi, Guo Dong, Shi Feng, Yu Fujing, Du Ze, Wang Zhongliang, Wei Chenrui.
The previous editions of this document and its replacement have been published as:
JC 507 was first published in 1993 and revised for the first time in 2012.
This is the second revision.
1. Scope
This document specifies the classification, specifications and markings, raw materials, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, protection and maintenance of terrazzo for building decoration (referred to as terrazzo).
This document applies to prefabricated terrazzo products and cast-in-place terrazzo.
2. Normative reference documents
The content of the following documents constitutes an essential provision of this document by means of normative references in the text. In the case of a dated reference, only the version corresponding to that date applies to this document, and the most recent version of the undated reference (including all change orders) applies to this document.
GB 175 General purpose Portland cement
GB/T 201 Aluminate cement
GB/T 701 Mild steel hot-rolled round rod
GB/T 2015 White Portland cement
GB 6566 Radionuclide Limits for Building Materials
GB 8076 Concrete admixtures
GB/T 13891 Method for determining the specular gloss of architectural decoration materials
GB/T 14684 Sand for construction
GB/T 14685 Pebbles and gravel for construction
GB/T 16925—1997 Test methods for wear resistance of concrete and its products (ball bearing method)
GB/T 18736 Mineral admixtures for high-strength and high-performance concrete
GB/T 20472
GB/T 21120 Synthetic fibers for cement, concrete and mortar
GB/T 23265 Chopped basalt fibers for cement, concrete and mortar
GB/T 35157 Resin type synthetic stone slab
GB/T35165 Terminology and classification of synthetic stone
GB/T 38143 Alkali-resistant glass fibers for cement, concrete and mortar
GB 50073 Code for design of clean workshops
GB 50209—2010 Code for acceptance of construction quality of building ground engineering
GB 50210 Quality Acceptance Standard for Building Decoration and Decoration Projects
GB 50300 Unified Standard for Acceptance of Construction Quality of Construction Projects
JC/T 539 Pigments for concrete and mortar and test methods thereof
JGJ63 Water Standard for Concrete
SJ/T 10694 General Specification for Anti-static Detection of Electronic Product Manufacturing and Application Systems
SJ/T 31469 Anti-static ground construction and acceptance regulations
YB/T 5294 Low carbon steel wire for general purpose
3 Terms and Definitions
GB/T 35165 and the following terms and definitions apply to this document.
3.1 水磨石 Terrazzo
It is a building decoration material made of cement or a mixture of cement and polymer as the main cementitious material, crushed stone and sand as the main aggregate, stirred, vibrated or pressed to form, cured, and the surface is ground and/or polished.
Note: Includes precast and cast-in-place.
3.2 普通水磨石 nomal terrazzo
With cement as the main cementitious material, the structural form is mostly double-layer terrazzo, and its average flexural strength is not less than 5.0MPa, and the water absorption rate is not more than 8.0%.
3.3 高性能水磨石 high performance terrazzo
With cement as the main cementitious material, the structural form is mostly single-layer terrazzo, and its average flexural strength is not less than 8.0MPa, and the water absorption rate is not more than 6.0%.
3.4 水泥人造石 cementitous terrazzo
The mixture of cement and polymer is the main cementitious material, the structural form is a single layer, the average flexural strength of which is not less than 10.0MPa, and the water absorption rate is not more than 4.0%.
3.5 高性能水泥人造石 high performance cementitous terrazzo
The mixture of cement and polymer is the main cementitious material, the structural form is a single layer, the average flexural strength of which is not less than 15.0MPa, and the water absorption rate is not more than 1.0%.
Note: It is also known as high-performance inorganic artificial stone.
3.6 不发火水磨石 terrazzo of misfire
Terrazzo does not produce sparks (or sparks) during certain mechanical tests such as friction, impact or scrubbing.
3.7 洁净水磨石 terrazzo of lustration
Terrazzo that meets the requirements of the clean room in terms of dust emission in use.
3.8 防静电水磨石 terrazzo of avoid static
Terrazzo with anti-static function.
3.9 返浆 slurry appear
The phenomenon of a bottom mortar appears on the polished surface of the terrazzo.
3.10 杂质 impurity
It is a substance that exists on the surface or inside of terrazzo products, and is different from the terrazzo product itself (such as paper, rubber, plastic, etc.), and is in the form of dots, clumps or threads.
[Source: GB/T 35165—2017, 3.7.2, with modifications]
3.11 杂石 mixed rock
Stone ballast with terrazzo decorative surface color is not harmonious, the color is significantly different and affects the decorative effect of the surface layer.
3.12 石碴 rock dregs
Different varieties of decorative stones with a particle size of 0.45mm or more obtained by crushing and screening crushed stone.
3.13 越线 exceed line
On the decorative surface of a patterned product, at the junction of two or more colors, a color exceeds the line specified in the pattern and invades the adjacent color area.
3.14 图案偏差 pattern warp
When two or more terrazzos form a pattern, the lines between adjacent terrazzos do not coincide, that is, the lines deviate from each other.
3.15 尺寸稳定性 dimensional stability
The shrinkage, expansion and warping of prefabricated terrazzo due to contact with the moisture contained in the mortar or adhesive during wet installation lead to the phenomenon of geometric dimensional change.
4 Classification, Specifications and Marking
4.1 Classification
4.1.1 Terrazzo is divided into flexural strength and water absorption:
a) Ordinary terrazzo (P);
b) High-performance terrazzo (HP);
c) Cement Engineered Stone (R);
d) High-performance cement engineered stone (HR).
4.1.2 Terrazzo is divided into the following methods according to the way of production:
(a) 预制水磨石(YZ);
b) Terrazzo (XJ).
4.1.3 Terrazzo is divided into common functions:
a) 常规水磨石(CG);
b) 防静电水磨石(FJ);
c) Non-pyrophoric terrazzo (BH);
d) 洁净水磨石(JS)。
4.1.4 Terrazzo is divided into the following according to the parts used in the building and the type of product:
a) 墙面和柱面用水磨石(Q);
b) 地面用水磨石(D);
c) 异型截面用水磨石(Y)。
4.1.5 Terrazzo is divided into the following according to the surface effect of the product:
a) 粗面(非光面)水磨石(CM);
b) Matte terrazzo (YG);
c) Smooth terrazzo (GM).
4.1.6 Terrazzo is divided into different types of cementitious materials:
a) 水泥基水磨石(SN);
b) 聚合物基水磨石(PMC)。
4.1.7 Terrazzo is divided into Class A, Class B and Class C according to dimensional stability.
4.2 Specifications
The specifications and sizes of watered terrazzo are determined according to the actual project, and the common specifications and sizes of prefabricated terrazzo are shown in Table 1. Table 1 Common specifications and sizes of prefabricated terrazzo
The unit is mm
| category | index |
| Length (L) | 300,400,500,600,800,1200,1400,1600,2400,2700,3000,3200 |
| Width (B) | 300,400,500,600,800,1200,1400,1600,1800 |
| Thickness (H) | 15,20,25,30,40,50,60 |
| Note: Other specifications and sizes are jointly negotiated by the design and use department and the manufacturer. |
4.3 Marking
According to the flexural strength and water absorption, the classification code, the type of cementitious material, the category (production method - common function - use part - surface effect), dimensional stability deformation classification, specification and this document number is marked in order.
Example 1: Conventional prefabricated rough-faced cement-based universal terrazzo for floors with specifications of 400 mm× 400 mm× 25 mm classified as Class A in accordance with this document, marked as:
Plain terrazzo P SN-YZ-CG-D-CM A 400×400×25 JC/T 507
Example 2: Conventional prefabricated rough-faced cementitious high-performance terrazzo for the floor with specifications of 400mm×400mm×25mm in accordance with this document, with dimensional stability deformation classification of Class A, marked as:
High-performance terrazzo HP SN-YZ-CG-D-CM A 400×400×25 JC/T 507
Example 3: In accordance with this document, the dimensional stability deformation classification is 800mm×800mm×40mm wall precast matte cement artificial stone, marked as:
水泥人造石 SN-IZ-FJ-Q-IZ A 800×800×40 JC/T 507
Example 4: In accordance with this document, the dimensional stability deformation classification is Class A with a specification of 3200mm×1600mm×20mm Anti-static precast polishing 80 gloss unit resin-cement-based high-performance cement man-made stone, marked as:
Example 5: High performance cement engineered stone HR PMC-YZ-FJ-D-GM80 A3200×1600×20 JC/T 507
5 Raw Materials
5.1 Cement
It is advisable to use general Portland cement, white Portland cement, sulfoaluminate cement or aluminate cement, and its performance should meet the provisions of GB175, GB/T2015, GB/T20472 and GB/T 201 respectively.
5.2 Sand
It should comply with the provisions of GB/T14684, and the mud content should not be greater than 1%.
5.3 Stone
It should comply with the provisions of GB/T14685, in which the mud content should not be greater than 1%, and the maximum particle size of the stone should not be greater than two-thirds of the thickness of the terrazzo.
5.4 Stone ballast, stone powder
5.4.1 Decorative stone ballast should be made of unweathered natural rock crushing and processing, and dolomite and marble ballast should be used for watering terrazzo, and the quality of stone ballast should comply with the provisions of GB/T14685. The stone ballast used in anti-static terrazzo and non-igniting terrazzo should comply with the provisions of GB50209-2010 and be confirmed by the non-ignition test. The ballast used for clean terrazzo should be hard and wear-resistant. The ballast used for clean terrazzo and non-pyrophoric terrazzo should be pre-treated with anti-static treatment.
5.4.2 The mud content of ballast should not be greater than 1%.
5.4.3 The maximum particle size of stone powder should be less than 80μm.
5.5 Coloring pigments
It should comply with the design and JC/T 539 regulations.
5.6 Water for mixing
It should comply with the provisions of JGJ63.
5.7 Admixtures
It should comply with the provisions of GB 8076.
5.8 Fees
It should meet the requirements of GB/T18736.
5.9 Steel
It should comply with the provisions of YB/T5294 or GB/T701.
5.10 Polymers
It should meet the requirements of its corresponding product standards.
5.11 Fibrous Materials
It shall comply with the provisions of GB/T 21120, GB/T 23265 and GB/T 38143.
5.12 Caulking Materials
It should meet the requirements of design and relevant standards.
5.13 Other materials for terrazzo production
It should meet the requirements of design and relevant standards.
5.14 Radioactivity requirements for raw materials for terrazzo production
It should meet the requirements of GB6566.
6 Technical Requirements
6.1 Appearance Quality
6.1.1 The technical requirements for the appearance quality of terrazzo decorative surfaces are shown in Table 2.
Table 2 Technical requirements for the appearance quality of terrazzo decorative surfaces
| The name of the defect | Technical requirements | |||
| Ordinary terrazzo | High-performance terrazzo | Cement artificial stone | High-performance cement artificial stone | |
| Dew muscle | Not allowed | Not allowed | Not allowed | Not allowed |
| fissure | Not allowed | Not allowed | Not allowed | Not allowed |
| Slurry, impurities | Not allowed | Not allowed | Not allowed | Not allowed |
| Chromatic aberrations, scratches, miscellaneous stones, pores | Not obvious | Not obvious | Not allowed | Not allowed |
| Corner defects | The missing corner area shall not exceed 5mm×2mm; The length of the missing edge shall not exceed 10mm, and the width shall not exceed 2mm. 2 places are allowed. | The missing corner area shall not exceed 3mm×2mm The length of the missing edge shall not exceed 5mm, and the width shall not exceed 1mm. 1 place is allowed | Not allowed | Not allowed |
| Note 1: Cracks caused by surface water loss, etc., are not considered cracks. Note 2: When the customer has a porosity decoration requirement, the porosity is allowed to exist. |
6.1.2 When there is a pattern on the polished surface of terrazzo, its crossing line and pattern deviation shall comply with the provisions of Table 3.
Table 3 has the technical requirements for the cross-line and pattern deviation of the patterned terrazzo polished surface
| The name of the defect | Technical requirements | |||
| Ordinary terrazzo | High-performance terrazzo | Cement artificial stone | High-performance cement artificial stone | |
| Pattern deviation | ≤3 mm | ≤2 mm | ≤2 mm | ≤2 mm |
| Cross the line | Crossing distance≤2 mm; Length≤ 10mm; 2 places are allowed | Wire crossing distance≤2 mm length≤5 mm; 1 place is allowed | Not allowed | Not allowed |
6.2 Dimensional deviations
6.2.1 The allowable deviation, flatness and angle allowable limit tolerance of prefabricated terrazzo shall comply with the provisions of Table 4 and Table 5.
Table 4 Technical requirements for the dimensional deviation of terrazzo on walls, columns and floors The unit is millimeters
| Inspection items | Technical requirements | ||||
| Ordinary terrazzo | High-performance terrazzo | Cement artificial stone | High-performance cement artificial stone | ||
| Length (L) | 0,-1 | ||||
| Width (B) | 0,-1 | ||||
| Thickness (H) | ±1.0 | ||||
| Flatness | L≤600 | ≤0.8 | ≤0.8 | ≤0.6 | ≤0.2 |
| 600<L≤1200 | ≤0.8 | ≤0.8 | ≤0.6 | ≤0.5 | |
| L>1200 | ≤1.0 | ≤1.0 | ≤0.8 | ≤0.7 | |
| angle | L≤600 | ≤0.8 | ≤0.8 | ≤0.6 | ≤0.3 |
| 600<L≤1200 | ≤0.8 | ≤0.8 | ≤0.6 | ≤0.4 | |
| L>1200 | ≤1.0 | ≤1.0 | ≤0.8 | ≤0.5 |
Table 5 Technical requirements for terrazzo size deviation of special-shaped cross-section The unit is millimeters
| Inspection items | Technical requirements | ||||
| Ordinary terrazzo | High-performance terrazzo | Cement artificial stone | High-performance cement artificial stone | ||
| Length (L) | ±2 | ±1 | ±1 | ±1 | |
| Width (B) | ±2 | ±1 | ±1 | ±1 | |
| Thickness (H) | ±2 | +1,-2 | +1,-2 | ±1 | |
| Flatness | L≤600 | ≤1.0 | ≤1.0 | ≤0.8 | ≤0.6 |
| 600<L≤1200 | ≤1.5 | ≤1.5 | ≤1.0 | ≤0.8 | |
| L>1200 | ≤2.0 | ≤2.0 | ≤1.5 | ≤1.0 | |
| angle | L≤600 | ≤0.8 | ≤0.8 | ≤0.6 | ≤0.4 |
| 600<L≤1200 | ≤1.0 | ≤1.0 | ≤0.8 | ≤0.6 | |
| L>1200 | ≤1.5 | ≤1.5 | ≤1.0 | ≤0.8 |
6.2.2 The angle between the front and the side should not be greater than 90°.
6.3 Dimensional Stability
The dimensional stability of terrazzo should meet the requirements of Class A in Table 6.
Table 6 Deformation classification of terrazzo
| classify | A | B | C |
| Total displacement amplitude/mm | <0.3 | 0.3～<0.6 | ≥0.6 |
| Note: According to the classification, different pavement bonding materials are selected. |
6.4 Physical and mechanical properties
The flexural strength, water absorption and linear thermal expansion coefficient requirements of terrazzo are shown in Table 7, and the performance of large aggregate artificial stone is determined by the supply and demand parties.
Table 7 Requirements for flexural strength, water absorption and linear thermal expansion coefficient of terrazzo
| Projects | index | ||||
| Ordinary terrazzo | High-performance terrazzo | Cement artificial stone | High-performance cement artificial stone | ||
| Flexural strength/MPa | average value | ≥5.0 | ≥8.0 | ≥10.0 | ≥15.0 |
| minimum | ≥4.0 | ≥6.5 | ≥8.0 | ≥12.0 | |
| Water Absorption/% | ≤8.0 | ≤6.0 | ≤4.0 | ≤1.0 | |
| Coefficient of linear thermal expansion/°C¹ | ≤1.3×10⁵ |
6.5 Application Performance
6.5.1 The wear resistance of ground terrazzo is not less than 1.5.
6.5.2 The gloss of glossy terrazzo should meet the design requirements, and the gloss of rough and matte terrazzo is not required.
6.5.3 The anti-slip grade of terrazzo with anti-slip requirements shall meet the requirements of GB/T 35157 or meet the design requirements.
6.5.4 The anti-static performance of anti-static terrazzo shall meet the requirements of SJ/T 31469.
6.5.5 The non-igniting performance of non-igniting terrazzo shall meet the requirements of Appendix A of GB50209-2010.
6.5.6 The pollution resistance shall meet the design requirements.
6.5.7 The air cleanliness level of clean terrazzo shall meet the design requirements.
6.5.8 Other application properties of terrazzo should meet the design requirements.
6.6 Quality and technical requirements for watering terrazzo
Proceed in accordance with Appendix A.
7 Test Methods
7.1 Gages and Instruments
The main test measuring tools and instruments are as follows:
a) Steel ruler: the minimum index value is 0.5mm;
b) Vernier caliper: the index value is at least 0.1mm;
c) Steel flat ruler: straightness deviation is 0.1mm;
d) 90° steel angle ruler: the length of the inner corner is 450mm×400mm, and the tolerance of the verticality of the inner corner is 0.13mm;
b) (0.01 mm)
f) Balance: weighing range 0kg~5kg, graduation value 1g;
g) Electric constant temperature blast drying oven: temperature range 50°C~300°C;
h) Universal testing machine, press or other flexural testing machine: the indication accuracy is 1%, and the index value shall not be greater than 50N; i) Gloss meter: the angle of incidence is 60°, and the index value is 0.1 gloss unit.
7.2 Appearance Quality
7.2.1 Place the terrazzo flat on the ground and visually inspect the surface layer of the terrazzo for cosmetic defects under natural light: defects that are clearly visible at a distance of 1.5m from the terrazzo are considered defective, otherwise they are considered to be defective.
7.2.2 Use a steel ruler to measure the length and width of the terrazzo corner defect, and the measurement method is shown in Figure 1. The reading is accurate to 0.5mm.
Description of indexing symbols:
L₄ - length of corner defect;
B₄ – Width of the corner defect.
Fig.1 Schematic diagram of the measurement method of corner defect
7.2.3 Use a steel ruler to measure the pattern deviation value and the distance and length of the crossing, and the reading is accurate to 0.5mm.
7.2.4 Under natural light, the sample of the variety and the product are placed side by side on the ground, and the color difference is visually observed at a distance of 1.5m from the terrazzo.
7.3 Dimensional Deviations
7.3.1 Dimensions
Measure the length and width of the terrazzo with a steel ruler, and measure three straight lines each, and the measurement part is shown in Figure 2. Use vernier calipers to measure the thickness of the midpoint on each side of the terrazzo. The maximum and minimum values of the deviation are used to express the dimensional deviation of length, width, and thickness, respectively. Readings are accurate to 0.5mm.
The unit is mm
Description of the indexing number:
1, 2, 3 - width measurement line;
1′, 2′, 3′ – length measuring lines
Fig.2 Schematic diagram of length and width measurement
7.3.2 Flatness
Place the steel flat ruler on the two diagonals of the inspected plane, and measure the gap between the steel flat ruler surface and the terrazzo inspected plane with a feeler gauge. When the length of the diagonal of the inspected is greater than 1000mm, the steel flat ruler with a length of 1000mm is used to inspect the diagonal in sections, as shown in Figure 3. The limit tolerance of the flatness of the terrazzo is expressed as the feeler gauge reading with the largest void. The reading is accurate to 0.1mm.
The unit is mm
Fig.3. Schematic diagram of flatness measurement method
7.3.3 Angles
7.3.3.1 When the length of the long side is less than or equal to 600mm, the measurement method is as follows: the long side of the 90° steel angle ruler is close to the long side of the plate, and the short side is close to the short side of the plate, and the gap between the plate and the short side of the angle ruler is measured with a feeler gauge. When the angle to be detected is greater than 90°, the measuring point is at the root of the corner, and when the angle to be detected is less than 90°, the measuring point is at the end of the edge of the long side or 400mm from the root. The measurement schematic is shown in Figure 4, when the long side of the angle ruler is greater than the long side of the plate surface, the two pairs of angles of the end face of the plate edge are measured by the method of Figure 4a) and Figure 4b); when the long side of the angle ruler is less than the long side of the plate surface, the four corners of the plate surface are measured by the method of Figure 4c) and Figure 4d), and the angular limit tolerance of terrazzo is represented by the feeler gauge sheet reading with the maximum gap of 400mm, and the reading is accurate to 0.01mm:
The unit is mm
a) The long side of the angle ruler is greater than the long side of the board surface form 1 b) The long side of the angle ruler is greater than the long side of the plate surface form 2
c) The long side of the angle ruler is less than the length of the board surface 1 d) The long side of the angle ruler is less than the long side of the board surface 2
Description of the indexing number:
1 - terrazzo;
2 - Ruler:
3 - Feeler gauge.
Fig.4 Schematic diagram of the angle measurement method
7.3.3.2 When the length of the long side is greater than 600mm, the terrazzo angle is expressed by its diagonal length difference.
7.3.3.3 Use a rectangular ruler to measure the angle between the front and the side.
7.4 Dimensional Stability
The dimensional stability test shall be carried out in accordance with the provisions of GB/T 35157.
7.5 Physical and mechanical properties test
7.5.1 Specimen maintenance
The age of the sample is 28 days of standard curing.
7.5.2 Flexural strength
7.5.2.1 Specimen preparation
The test was carried out with a specimen cut into 150 mm × 100 mm. The force direction of the specimen shall not contain steel bars, the allowable deviation of the length of the specimen shall be ±5mm, the allowable deviation of the width shall be ±1mm, and the thickness shall be the thickness of the product. Only one piece of terrazzo can be taken, in a group of five.
7.5.2.2 Test Procedure
The test procedure is as follows:
a) Place the specimen flat in the water tank, separate the water tank from the specimen with a glass rod, keep the water surface higher than the upper surface of the specimen (50±10) mm, take it out of the water after immersion in water for 24 hours, wipe off the water traces on the surface of the specimen with a damp cloth, measure the thickness and width of the middle part of the specimen with vernier calipers, and the reading accuracy is 0.1mm;
b) Select a testing machine of appropriate range, so that the expected failure load of the specimen is not less than 20% of the full scale, nor more than 80% of the full scale, the center distance of the supporting cylinder of the bending test frame is 100mm, and the arc radius of the supporting cylinder and the load pressure head is 10mm~15mm;
c) The polished side of the specimen is simply supported on the two supporting cylinders of the test frame, and the testing machine is started to make the specimen slowly stressed, and the load is evenly and continuously increased at a speed of 30N/s~50N/s until the specimen is broken, and its maximum load is recorded. The pressurization method is shown in Figure 5.
Description of indexing symbols:
P-— test load;
L—- the center distance of the supporting cylinder.
Fig.5. Schematic diagram of the loading mode of the flexural test
7.5.2.3 Calculation of Results
Flexural strength R, calculated according to equation (1):
During the ceremony:
Ry——The flexural strength of terrazzo in megapascals (MPa);
Pmax - the maximum failure load at breakage, in Newtons (N);
L₁ - the center distance of the supporting cylinder, in millimeters (mm);
b——Width of the specimen, in millimeters (mm);
h - the thickness of the specimen, in millimeters (mm).
The flexural strength is expressed by the arithmetic mean value and the minimum value of the single block of the group of specimens, and the calculated result is accurate to 0.1MPa.
7.5.3 Water Absorption
7.5.3.1 Specimen preparation
The test is carried out with a specimen cut into 150mm×100mm, and the thickness is the thickness of the product. There are 5 specimens in each group, and only one specimen can be taken for each terrazzo.
7.5.3.2 Test Procedure
The test procedure is as follows:
a) Put the specimen into the electric constant temperature blast drying oven, dry to constant weight at (105±5) °C, and then cool to room temperature in the glass dryer, and weigh its dry weight Mo. Accurate to 1g;
b) Place the dry weight specimen flat in the water tank, separate the water tank from the specimen with a glass rod, keep the water surface higher than the upper surface of the specimen (50±10) mm, take it out of the water after immersion in water for 24 h, wipe off the water traces on the surface of the specimen with a damp cloth, and immediately weigh its wet weight M, and the reading is accurate to 1g
7.5.3.3 Calculation of Results
The water absorption rate W is calculated according to equation (2):
During the ceremony:
W - water absorption, %;
M₀ - the dry weight of the specimen, in grams (g);
M5 – the wet weight of the specimen in grams (g).
The water absorption rate is expressed by the maximum value of the single block of the test results of this group, and the calculation result is accurate to 0.1%.
7.5.4 Coefficient of Linear Thermal Expansion
In accordance with the provisions of GB/T 35157.
7.6 Application Performance Testing
7.6.1 The abrasion resistance test method shall be carried out in accordance with the provisions of GB/T 16925-1997.
7.6.2 Gloss determination shall be carried out in accordance with the provisions of GB/T 13891.
7.6.3 The test methods for slip value, friction coefficient and antistatic performance shall be carried out according to GB/T 35157 and SJ/T 10694 respectively.
7.6.4 The test method for pollution resistance shall be carried out in accordance with the provisions of GB/T 35157.
7.6.5 The non-flammability test method shall be carried out in accordance with Appendix A of GB 50209-2010.
7.6.6 The cleanliness test method of clean terrazzo shall be carried out in accordance with the provisions of the GB50073.
8 Inspection Rules
8.1 Inspection Classification
8.1.1 Factory inspection
Factory inspection items: appearance quality, dimensional deviation, flexural strength and water absorption.
8.1.2 Type Inspection
Type inspection items: appearance quality (6.1), dimensional deviation (6.2), dimensional stability (6.3), physical and mechanical properties (6.4), application performance corresponding to the product function (6.5).
Type inspection should be carried out under one of the following circumstances:
a) When the new product is prototyped and identified;
b) After formal production, if there are major changes in materials, equipment and processes, which may affect the performance of the product;
c) During normal production, the production quantity of the same category and specification shall reach 100,000 m² once every six months or in the same category;
d) When the product resumes production after a long period of discontinuation;
e) When there is a big difference between the factory inspection result and the last type inspection result.
8.2 Batching
8.2.1 The factory inspection batch is composed of terrazzo of the same variety and specification of an order, not more than 3000m² and not more than 3 months of the same type of product is a batch, if the factory is less than 3000m or less than 3 months can still be used as an inspection batch.
8.2.2 The batch of type inspection shall be composed of terrazzo of the same type and specification, and the maximum amount of one inspection batch shall not exceed 100,000 m².
8.3 Sampling Scheme
The samples required for factory inspection and type inspection should be randomly selected in the same inspection batch. The number of samples taken is shown in Table 8 (anti-static properties, anti-slip value, coefficient of friction and cleanliness are tested in combination with engineering).
Table 8 Table of the number of samples taken
The unit is block
| Batch range | Number of samples | |||||||||
| Appearance quality | Dimensional deviation | Dimensional stability | Water absorption rate | Flexural strength | Abrasion resistance | Coefficient of linear thermal expansion | Glossiness | Non-flamming performance | Contamination resistance | |
| 20～500 | 20 | 13 | 5 | 5 | 5 | 5 | 2 | 5 | 10 | 5 |
| 501～1200 | 32 | 20 | ||||||||
| 1201～3200 | 50 | 32 | ||||||||
| 3201～10000 | 80 | 32 |
8.4 Judgment Rules
8.4.1 Factory inspection and judgment
8.4.1.1 Appearance quality and dimensional deviation shall be judged according to Table 9.
Table 9 Appearance quality and size deviation test quantity The unit is block
| 栏号 | 1 | 2 | 3 | 4 |
| Inspection items | Number of specimens | H | B | be 1Zg |
| Appearance quality | 20 32 50 80 | 3 5 7 10 | 4 6 8 11 | 2 3 5 8 |
| Dimensional deviation | 13 20 32 | 1 2 3 | 2 3 4 | 1 |
When the number of unqualified specimens is less than or equal to H₂, the batch of products is judged to be qualified, when it is greater than B, it is judged that the batch of products is unqualified, and when it is equal to B, re-sampling is allowed.
After re-sampling, when the number of unqualified samples in the second batch of samples is less than or equal to H, the batch of products is judged to be qualified, and when it is greater than H, the batch of products is judged to be unqualified.
8.4.1.2 Determination of flexural strength: When the test results of flexural strength meet the requirements in 6.4, the batch of products shall be judged to be qualified.
8.4.1.3 Determination of water absorption: When the test results of water absorption meet the requirements in 6.4, the batch of products shall be judged to be qualified.
8.4.1.4 Total judgment: When the appearance quality, dimensional deviation, flexural strength and water absorption meet the technical requirements, it will be judged to be qualified.
8.4.2 Type inspection and determination
8.4.2.1 The judgment of appearance quality and size deviation is the same as that of 8.4.1.1.
8.4.2.2 The determination of flexural strength is the same as that of 8.4.1.2.
8.4.2.3 The determination of water absorption rate is the same as that of 8.4.1.3.
8.4.2.4 When the test results of dimensional stability meet the requirements in 6.3, the batch of products shall be judged to be qualified.
8.4.2.5 When the test result of the linear thermal expansion coefficient meets the requirements in 6.4, the batch of products shall be judged to be qualified.
8.4.2.6 The judgment of gloss, wear resistance, non-ignition performance, pollution resistance, anti-static performance, cleanliness, anti-slip value and friction coefficient shall be carried out according to 6.5.
8.4.2. 7 General judgment: appearance quality, dimensional deviation, water absorption, dimensional stability and physical and mechanical properties all meet the technical requirements, and when the application items meet the corresponding requirements, they are judged to be qualified.
9 Marking, Packaging, Transportation and Storage
9.1 Marks
9.1.1 Terrazzo should be marked with the product after packaging.
9.1.2 The terrazzo leaving the factory shall have a product quality certificate, which is as follows:
a) Certificate number;
b) Product marking;
c) The name or trademark of the manufacturer;
d) Date of manufacture or batch number;
e) Signature of the quality inspection department of the manufacturer.
9.2 Packaging
9.2.1 According to the distance and road conditions, terrazzo packaging should be smooth and opposite, and its packaging methods are divided into bundled packaging, box packaging and pallet packaging.
a) Strapping and packing. The bundling package should meet the following requirements:
The packaging rope should have sufficient strength, and the edges and corners should be tightly tied and protected when packing;
Except for large products that allow single bundling, other products are packaged in even numbers;
Simple packaging should not be less than 3 strapping points, each strapping point should not have less than five ropes, and the product should not be exposed when sealing the package.
b) Box packing. The box packaging should meet the following requirements:
The packing box can be made of cartons, wood or substitute boards with similar performance, and the specifications of the packing box are agreed upon by both parties;
When the product is packed into the box, the surrounding voids should be compacted with a soft filler.
c) Pallet packing. Pallet packaging should meet the following requirements:
The pallet specifications should conform to the dimensions permitted by the means of transport and be compatible with the product modulus;
The pallet is firmly tied to each other and should not be loose during transportation.
9.3 Transportation
9.3.1 Terrazzo products should be placed upright during transportation, and the inclination of each row should not be greater than 15°, and the terrazzo packaging should be in contact with the means of transport
The pad should be supported so that the force is even.
9.3.2 The transportation should be stable and should not be shocked. Rainproof measures should be taken during long-distance transportation, and should be handled gently and not thrown during handling.
9.4 Storage
9.4.1 The product should be handled with care.
9.4.2 The product should be stored indoors and covered when stored outdoors.
9.4.3 During the storage period, the product should be stacked in two ways: upright and flat:
a) When stacking vertically, the smooth surface should be opposite, the inclination angle should not be greater than 15°, the height of the stack should not exceed 1.6m, and the single layer should not exceed 1.8m.
b) When stacking flat, the surface should be relatively smooth, the ground should be flat, and the height of the stack should not exceed 1.4 m.
10 Protection and Maintenance
10.1 Terrazzo shall be surface-protected by surface sealing and curing or other protective materials before being put into use.
10.2 Neutral or weak alkaline detergents should be used for the maintenance of terrazzo surface, and there should be no harmful acids and alkalis and other chemicals that may damage the surface of terrazzo.
Appendix A
(Normative)
Technical and engineering quality acceptance requirements for watering terrazzo products
A.1 Overview
This appendix applies to cast-in-place terrazzo.
A.2 Technical requirements for watered terrazzo products
A.2.1 The quality of the watering terrazzo shall meet the design requirements and the requirements of the current specifications GB 50209-2010, GB 50210 and GB 50300, and the cushion treatment in the construction process shall be done well, and the following requirements shall be met.
A.2.2 The appearance quality of the watering terrazzo shall comply with the provisions of 6.1.
A.2.3 The permissible deviation of the in-situ terrazzo shall be in accordance with the provisions of Table A.1.
Table A.1 Permissible deviation of watering terrazzo in millimeters
| serial number | Item day | Ordinary terrazzo | High-performance terrazzo | Cement artificial stone | High-performance cement artificial stone |
| 1 | Flatness | ≤3 | ≤2 | ≤2 | ≤2 |
| 2 | The baseboard is straight at the mouth | ≤3 | ≤3 | ≤3 | ≤2 |
| 3 | The seam is straight | ≤3 | ≤2 | ≤2 | ≤2 |
A.2.4 The physical and mechanical properties of watered terrazzo shall comply with the provisions of 6.4.
A.2.5 The application performance of watered terrazzo shall comply with the provisions of 6.5.
A.3 Quality test methods for watered terrazzo
A.3.1 Appearance quality test method of watered terrazzo
A.3.1.1 Visual inspection of terrazzo surface surface defects under natural light: Defects that are clearly visible at a distance of 1.5 m from the terrazzo are considered defective;
A.3.1. 2 Use a steel ruler to measure the pattern deviation value and the distance and length of the line crossing, and the reading is accurate to 1mm.
A.3.1.3 Place a sample of the variety on the ground-watered terrazzo under natural light and visually observe it at a distance of 1.5m from the terrazzo.
A.3.2 Dimensional deviation test method for water-in-situ terrazzo
A.3.2.1 Check the surface flatness with a 2m ruler and a wedge feeler gauge.
A.3.2.2 Check the straightness of the mouth and the straightness of the seams on the baseboard with a tie wire and a steel ruler.
A.3.3 Test methods for physical and mechanical properties and functional properties of watered terrazzo
A.3.3.1 Preparation of test samples: Under the construction conditions of the cast-in-place site, the pouring mold is formed, and the samples are cut and sampled after rough grinding, slurry filling, fine grinding, protection and other treatment methods that are basically consistent with the on-site construction conditions.
A.3.3.2 The test methods for the physical and mechanical properties and application properties of the cast-in-place terrazzo shall be carried out in accordance with Chapter 7.
A.4 Quality acceptance method of watered terrazzo
The quality acceptance of watering terrazzo shall comply with the provisions of 5.4 terrazzo surface layer in the current specification GB 50209-2010 and the requirements of GB 50210 and GB 50300.
The material comes from the Internet.
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