Aerated concrete block and preparation method thereof
A technology of aerated concrete and blocks, which is applied in the field of building materials, can solve the problems of complex preparation process, poor product pore structure, and difficult quantitative production, and achieve low thermal conductivity, uniform and dense pores, and reduce self-weight.
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[0032] Example 1
[0033] An air-entrained concrete block, comprising the following components by weight: 24.7% of shale ash, 29.7% of mineral powder, 44.6% of cement, 0.99% of gypsum, 0.11% of foam stabilizer, 0.3% of air conditioner, 5.0% of hydrogen peroxide, and a water-material ratio of 0.62;
[0034] 1. The preparation method of foam stabilizer, comprising the following steps:
[0035] Get 1 part by weight of oleic acid and mix with 2-4 parts by weight of triethanolamine, then dilute with water to a solution with a mass concentration of 30-50%, and mix in the diluted solution to account for the diluted solution mass percentage is 3-5% cellulose ether and mix well.
[0036] 2. The preparation method of air-entrained concrete block, comprising the following steps:
[0037] 1) Raw material pretreatment: the above raw materials are mixed and stirred evenly in proportion, the fineness of shale ash is 6-30%, the shale ash is sieved at 45um, the mineral powder is dried, and t...
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[0043] Example 2
[0044] An air-entrained concrete block, comprising the following components by weight: 49.5% of shale ash, 14.9% of mineral powder, 34.7% of cement, 0.99% of gypsum, 0.11% of foam stabilizer, 0.3% of air conditioner, 4.0% of hydrogen peroxide, and 0.60% of water-material ratio; preparation method Same as Example 1.
[0045] Product performance: absolute dry bulk density 286 / kg / m 3 , compressive strength 1.01 / MPa, specific strength 3.46×10 -3 ·N·M / Kg, thermal conductivity 0.0853 / W / (m·k).
Example Embodiment
[0046] Example 3
[0047] An air-entrained concrete block, comprising the following components by weight: 39.5% of shale ash, 26.3% of mineral powder, 21.9% of cement, 10.5% of waste block, 1.8% of gypsum, 0.11% of foam stabilizer, 0.3% of air conditioner, 3.5% of hydrogen peroxide, water material The ratio is 0.61; the preparation method is the same as that of Example 1, wherein the fineness of the waste blocks is 5-20%, and the sieve residue is 45um.
[0048] Product performance: absolute dry bulk density 329kg / m 3 , compressive strength 1.33 / MPa, specific strength 4.04×10 -3 ·N·M / Kg, thermal conductivity 0.1013 / W / (m·k).
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