Since the "Residential Design Code" GB 50096-2011 clearly stipulates that "the horizontal pipe of sewage and wastewater drainage should be set in the suite of this floor", the "same floor drainage" of the toilet completely replaces the "different layer drainage", which solves the problems caused by the "different layer drainage" interfering with the neighbors on the lower floor for a long time. The conventional practice of "same-floor drainage" is that the toilet downslab is in the shape of a "caisson", and the pipes are laid and backfilled with lightweight materials. Up to now, the toilet backfill process has gone through five ways, which one is the best? Wrap up the analysis!
Five ways to backfill your bathroom
Toilet backfill is the key process of the construction of the drainage toilet on the same floor, if you do not pay attention to it, greedy for a time to save money and shoddy, leakage and cracking and other problems occur in the later stage, the difficulty of maintenance and the cost will outweigh the loss. The following five ways of the toilet backfill process are experienced, and see how to choose!
One
Slag backfill
Recommendation index: zero stars☆☆☆☆☆
Construction slag is the construction waste generated in the construction process, the decoration team in order to save trouble and reduce costs, directly backfill the construction waste generated by knocking on the wall and opening holes in the decoration to the bathroom caisson, so that the construction is harmless and beneficial: first, because the construction waste is very heavy, it is easy to cause the caisson bottom plate to overload and crack; Second, construction waste is mostly angular cement blocks, etc., which are easy to damage the waterproof layer and pipelines, resulting in leakage; Thirdly, construction waste is easy to breed bacteria and mosquitoes in dirty and messy spaces.
Two
Slag backfill
Recommendation index: two stars ★★ ☆☆☆
Slag or carbon slag, cinder, is generally an industrial waste produced by metallurgical or thermal enterprises, which is cheap and belongs to the recycling of solid waste resources, but there are two major problems in the backfill of toilets: first, slag contains sulfide components, which is corrosive when exposed to water, accelerating the aging of pipelines; Second, the slag has strong water absorption, and the saturation can reach two tons per cubic weight, which is easy to lead to overload cracking of the caisson floor.
Three
Overhead is not filled
Recommendation index: two stars ★★ ☆☆☆
The overhead is not backfilled, and the bottom is supported by red bricks, or now many decoration masters intercept PVC pipes and pour cement instead of red bricks, and the overhead construction speed is faster and the cost is lower, which avoids the load-bearing problem caused by the construction slag, but there are two problems: first, the sound insulation and heat insulation effect of the bathroom is not good; Second, the space in the overhead layer is prone to bacterial growth, and even cockroaches and rats gather.
Four
Ceramsite backfill
Recommended index: 4 stars ★★★★☆
Ceramsite is an artificial light aggregate with a hard shell, a water-insulated glaze layer on the surface, and a microporous ceramic granular inside. It has good physical, chemical and hydraulic properties, large specific surface area, high porosity, and strong adsorption and dirt interception capacity. But the way of ceramsite backfilling is often cumbersome, and the construction time is long, and the cost is high. At the same time, it is easy to produce peculiar smells and harmful germs, and the maintenance cost is high.
Five
Foam backfill
Recommended index: 5 stars ★★★★★
Foamed backfill is foamed concrete (foamed cement) backfill, as the name suggests, is a microporous concrete mixed with foaming agent in concrete (cement), due to the uniform distribution of closed pores inside, taking into account the characteristics of light weight and high strength, effectively reducing the building load, and at the same time has the performance advantages of waterproof, sound insulation, heat preservation, vibration reduction and so on. In recent years, foamed concrete (foamed cement) has been widely used in toilet backfilling, replacing the traditional backfill method, which not only reduces the weight of the structure, but also has fast construction and excellent performance.