When many friends talk about the floor, they often hear a word, that is, "Mohs hardness", what does this "Mohs hardness" refer to? Today Xiaobian will talk about it for you.
01
What is Mohs hardness?
Mohs hardness is a standard that indicates the hardness of minerals, also known as Mohs hardness. It was first proposed in 1822 by the German mineralogist Frederich Mohs. is a standard used in mineralogy or gemology.
Mohs hardness is the use of notching method to engrave the surface of the mineral under test by a pyramidal diamond needle and measure the depth of the scratch, the depth of the scratch is the Mohs hardness, expressed by the symbol HM, which is also used to indicate the hardness of other materials.
Mohs hardness of the operation method
The different levels of hardness represent the different firmness of the molecular structure composition of the internal structure of the object, in other words, when the object with a solid molecular structure touches the object with a weak molecular structure, the latter will break the molecular structure and the so-called scratch will occur.
Grade 10 Mohs hardness
The Mohs hardness standard is arbitrarily determined and cannot be used precisely to determine the hardness of the material, for example, the actual hardness difference between grades 10 and 9 is much greater than the actual hardness difference between grades 2 and 1. But this grading is useful for mineralogists in the field. It is also commonly used in the flooring industry.
△ Mineralogically or gemologically, Mohs hardness is used
In 1822, F. Moss used the scratch hardness of ten minerals as the standard, and determined ten hardness grades, called Mohs hardness. The Mohs hardness levels of the ten minerals are, in order: diamond (10), corundum (9), topaz (8), quartz (7), feldspar (6), apatite (5), fluorite (4), calcite (3), gypsum (2), talc (1). Among them, diamond is the hardest and talc is the softest.
△ Mohs hardness pen, after the test can quickly and directly visually measure the hardness of the measured item, the hardness of the measured item is determined by the hardness pen Mohs hardness level of 2-9.
When measuring the mohs hardness of the industrial floor, we will mark the Mohs hardness stone on the industrial floor that has been completed by construction, and the test of the hardness of the marking is carried out sequentially from low to high, in general, after each test, it is necessary to observe whether the ground has scratches, if the ground does not have scratches, the actual hardness of the ground is greater than the hardness of the Mohs hardness stone.
02
Common industrial flooring Mohs hardness
Epoxy flooring
Epoxy flooring - Mohs hardness 2 to 5
Epoxy resin floor is composed of high-performance epoxy resin main agent and curing agent, with special machinery and auxiliary materials, through the construction of professional construction personnel on site and formed a color, closed organic matter protection layer of industrial flooring.
Since epoxy resin is organic, this protective layer has good surface water resistance, oil resistance, acid and alkali resistance, salt spray corrosion resistance and other chemical properties, flat and easy to clean.
Abrasion resistant floor
Wear-resistant floor - Mohs hardness 6 ~ 7
Abrasion-resistant flooring materials are factory ready-mixed, on-site dry-sprinkled floor hardeners. It is mainly composed of high-strength cement, inorganic wear-resistant aggregate, pigment powder (cement primary color no), additives, etc.
The aggregate is sandy, with an average particle size of 1.5mm, accounting for about 60% of the total; the cement is treated high-grade cement, in addition to the natural color of cement, there are red, yellow, green, gray and other colors to choose from. The concrete or cement mortar surface of the construction stage in the initial condensation stage is smoothed to form a hard and wear-resistant, dust-free and beautiful hardened floor.
Curing flooring
Cured flooring - Mohs hardness 8 ~ 9
Curing agent is a colorless transparent liquid, odorless, non-toxic, non-flammable, strong permeability, no VOC (volatile organic compound) components, composed of inorganics, chemical actives, silicides. The concrete sealing curing agent enters the inside of the concrete through infiltration, and after forming a gel, it can harden and seal the concrete, without dust or sand.
03
Industrial flooring options
For different environmental needs, we choose the right flooring material.
The biggest advantage of epoxy flooring is scalability, which can be applied to indoors, clean rooms, anti-static floors, and parking lots through different construction processes (the most effective way to distinguish parking spaces is to draw color squares).
The most widely used for abrasion-resistant and curing agent flooring should be warehouse buildings, where forklifts go everywhere, so the wear resistance of the ground is very demanding.