Industrial solid waste autoclaved aerated concrete block and preparation method thereof
A technology of concrete block and autoclaved aeration, which is applied in the field of concrete blocks and can solve the problems of low cost and low energy consumption.
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Embodiment 1
[0019] The industrial solid waste autoclaved aerated concrete block of this embodiment is made of the following raw materials by weight: 35 parts of fly ash, 25 parts of calcium carbide slag, 17 parts of red mud, 4 parts of lime, 5 parts of desulfurized gypsum, 12.5 parts of cement, 1.4 parts of aluminum powder, 0.7 parts of sodium hydroxide, 0.2 parts of water glass, and 0.7 parts of dispersant silica fume.
[0020] The method for preparing industrial solid waste autoclaved aerated concrete blocks includes the following steps:
[0021] ① Grind the fly ash, calcium carbide slag and red mud by weight respectively, and control the particle size to be: red mud ≤ 1mm, fly ash ≤ 0.075 mm, and calcium carbide slag ≤ 0.075 mm;
[0022] ②Add the fly ash, calcium carbide slag and red mud that have been ground in step ① together with the said parts by weight of lime, desulfurized gypsum, cement, sodium hydroxide, water glass, and dispersant silica fume into a mixer to prepare a mixture. Stirr...
Embodiment 2
[0030] The difference between the industrial solid waste autoclaved aerated concrete block of this embodiment and Example 1 is only in the content of the raw materials for preparing the industrial solid waste autoclaved aerated concrete block. The industrial solid waste autoclaved aerated concrete block in this embodiment is made of the following raw materials in parts by weight: 40 parts fly ash, 15 parts calcium carbide slag, 15 parts red mud, 3 parts lime, 3 parts desulfurized gypsum, 10 parts of cement, 1 part of aluminum powder, 0.5 part of sodium hydroxide, 0.1 part of water glass and 0.5 part of dispersant silica fume. The rest is the same as in Example 1.
[0031] The preparation method of the industrial solid waste autoclaved aerated concrete block in this example is the same as that in Example 1.
[0032] The absolute dry density of the industrial solid waste autoclaved aerated concrete block in this embodiment is 517.3 kg / , the compressive strength is 4.46 MPa, the dry ...
Embodiment 3
[0034] The difference between the industrial solid waste autoclaved aerated concrete block of this embodiment and Example 1 is only in the content of the raw materials for preparing the industrial solid waste autoclaved aerated concrete block. The industrial solid waste autoclaved aerated concrete block in this embodiment is made of the following raw materials in parts by weight: 20 parts of fly ash, 30 parts of calcium carbide slag, 20 parts of red mud, 5 parts of lime, 10 parts of desulfurized gypsum, 15 parts of cement, 2 parts of aluminum powder, 1 part of sodium hydroxide, 0.3 parts of water glass and 1 part of dispersant silica fume.
[0035] The preparation method of the industrial solid waste autoclaved aerated concrete block in this example is the same as that in Example 1.
[0036] The absolute dry density of the industrial solid waste autoclaved aerated concrete block in this example is 563.5kg / , the compressive strength is 3.64MPa, the dry shrinkage rate is 0.485mm / m, a...
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