What material is used to fill the bottom of the toilet?

The backfill materials of toilet are: slag, brick slag, perlite and ceramsite.

These materials have their own advantages and disadvantages:

1. Slag: Slag is the best of these, with good water content and certain structure, but now environmental protection is advocated, and there are basically no slag boilers in urban areas, so it is difficult to find materials. Disadvantages: The slag contains sulfur oxides, which will form sulfuric acid with water in the later stage, which has a certain corrosive effect on iron. It's best not to backfill the bathroom with slag for sewer pipes and ironware.

2. Brick slag or construction waste: Brick slag is a backfill material with relatively acceptable performance that can be found now. The disadvantage is water chestnut, which has a certain destructive effect on the waterproof layer. Break it when using it to minimize the destructive power per unit area. A lot of construction waste is mixed with a lot of garbage, such as plastic bags, betel nuts, cigarette butts and so on. Although you can't see inside, it's disgusting to think about it. The only advantage is to save money.

3, perlite: the texture is too loose, easy to cause sinking, not recommended.

4. Ceramsite: Ceramsite is an artificial lightweight aggregate (lightweight aggregate) with a hard shell, a waterproof and gas-retaining glaze layer on the surface and a microporous ceramic body inside.

It has good physical, chemical and hydraulic characteristics, large specific surface area, high porosity and strong adsorption and retention capacity. Its surface is porous, angular and rough. It is precisely because of these characteristics that ceramsite is often used to backfill sunken basements.

Extended data:

Toilet backfill method:

1, waste residue backfill: this method has the advantages of simple construction and low price, but the disadvantage is that some floors are afraid of being overweight, so it is generally not allowed to have better performance, and this method will be gradually eliminated;

2. Cement precast slab: it is a domestic process. First, make cement precast slabs outside (need to be reinforced), then use bricks to overhead, and then cover them on caissons. This method is a trend of caisson treatment in the future. At present, some cities have requested to treat caissons in this way;

3. Backfilling with light materials: It is best to use pearl cotton ceramsite or foam brick, and backfill with sand and cement. This way is the best, but the price is a little higher.