Sludge-based high-strength ceramsite and preparation method thereof
A high-strength ceramsite and sludge technology, applied in the field of building materials, can solve the problems of high water absorption rate of ceramsite, increase in cost of ceramsite, and rising prices, and achieve the goal of reducing water absorption rate, reducing secondary pollution and reducing costs. Effect
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Embodiment 1
[0035] A sludge-based high-strength ceramsite prepared by the following steps:
[0036] Take 100 parts of municipal sludge, 30 parts of construction spoil, and 50 parts of coal gasification slag, put them in an oven at 150°C for 7 hours, and measure the moisture content of each material to be <4%; grind the municipal sludge and pass through 50 mesh sieve, building spoils pass through a 800-mesh sieve, coal gasification slag passes through a 400-mesh sieve, and then the urban sludge, construction spoils and coal gasification slag are mixed evenly, and the void ratio of the mixture is calculated by using the compacted bulk density test method to be 4.5%. ;
[0037] After testing the porosity, pour the material into the granulator, mix 30 parts of the polycarboxylate water reducer with a concentration of 20% with the mixture, add a little deionized water, and granulate. After the granulation is successful , which is ceramsite raw material;
[0038] Put the ceramsite in a sinter...
Embodiment 2
[0040] A sludge-based high-strength ceramsite prepared by the following steps:
[0041] Take 100 parts of municipal sludge, 30 parts of construction spoil, and 50 parts of coal gasification slag, put them in an oven at 150°C for 7 hours, and measure the moisture content of each material to be <4%; grind the municipal sludge and pass through 50 mesh sieve, building spoils pass through a 800-mesh sieve, coal gasification slag passes through a 400-mesh sieve, and then the urban sludge, construction spoils and coal gasification slag are mixed evenly, and the void ratio of the mixture is calculated by using the compacted bulk density test method to be 4.5%. ;
[0042] After testing the porosity, pour the material into the granulator, mix 30 parts of the polycarboxylate water reducer with a concentration of 20% with the mixture, add a little deionized water, and granulate. After the granulation is successful , which is ceramsite raw material;
[0043] Put the ceramsite in a sinter...
Embodiment 3
[0045] A sludge-based high-strength ceramsite prepared by the following steps:
[0046] Take 50 parts of urban sludge, 35 parts of construction spoils, and 65 parts of coal gasification slag, put them in a microwave oven and dry them for 25 minutes, and the moisture content of each material is measured to be <4.5%; the urban sludge is ground and passed through a 50-mesh sieve. The spoil is passed through a 400-mesh sieve, and the coal gasification slag is passed through a 400-mesh sieve, and then the urban sludge, construction spoil and coal gasification slag are mixed evenly, and the void ratio of the mixture is calculated to be 3.6% by using the compacted bulk density test method;
[0047] After testing the porosity, pour the material into the granulator, mix 20 parts of polycarboxylate water reducer with a concentration of 30% with the mixture, add a little deionized water, and carry out granulation. After the granulation is successful , which is ceramsite raw material;
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