A kind of preparation method of high-strength and low-shrinkage cement composite material
A cement composite, low shrinkage technology, used in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as high porosity and low strength, achieve low shrinkage, shorten production time, and reduce shrinkage Effect
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Embodiment 1
[0020] Embodiment 1: The mass ratio of waste glass replacing cement is 10%
[0021] Set the bulk density to 500kg / m 3 The hollow fly ash and waste glass with a coarse particle size of 80 μm after being pressed are mixed with cement raw materials. The mass ratio of fly ash to waste glass is 1:1~2, and ammonium sulfate and acrylamide with a mass ratio of 1:0.2 are added. And sodium acrylate copolymer dry powder. The dry polymer powder needs to be ultrasonically treated for 20 minutes in advance to improve the dispersibility of the dry polymer powder, and the dry polymer powder should be added at the beginning of mixing for 1 minute; the improved mixing method is used for mixing, and stirring is carried out in a forced concrete mixer. The specific steps are as follows: : (1) Mix dry powder for 1 min; (2) Add industrial water and superplasticizer; (3) Mix at a stirring speed from low speed 1.5 m / s to high speed 2.0 m / s and then to low speed 0.5 m / s for 15 min;
[0022] The final...
Embodiment 2
[0023] Embodiment 2: The mass ratio of waste glass replacing cement is 20%
[0024] Set the bulk density to 400kg / m 3 The hollow fly ash, the waste glass with a coarse particle size of 100 μm after being pressed are mixed with cement raw materials, the mass ratio of fly ash to waste glass is 1:1~2, and ammonium sulfate and acrylamide with a mass ratio of 1:1 are added And sodium acrylate copolymer dry powder. The dry polymer powder needs to be ultrasonically treated for 5 minutes in advance to improve the dispersibility of the dry polymer powder, and the dry polymer powder is added at the beginning of mixing for 0.5 min; the improved mixing method is used for mixing, and the mixing is carried out in a forced concrete mixer. The specific steps are as follows: : (1) Mix dry powder for 5 minutes; (2) Add industrial water and water reducer; (3) Mix at a stirring speed from low speed 1 m / s to high speed 3.0 m / s and then to low speed 1.5 m / s for 10 minutes;
[0025] The final ceme...
Embodiment 3
[0026] Embodiment 3: The mass ratio of waste glass replacing cement is 30%
[0027] Set the bulk density to 300kg / m 3 The hollow fly ash and waste glass with a coarse particle size of 90 μm after being pressed are mixed with cement raw materials. The mass ratio of fly ash to waste glass is 1:1~2, and ammonium sulfate and acrylamide with a mass ratio of 1:5 are added. And sodium acrylate copolymer dry powder. The dry polymer powder needs to be ultrasonically treated for 10 minutes in advance to improve the dispersibility of the dry polymer powder, and the dry polymer powder is added at the beginning of mixing for 50 s; the improved mixing method is used for mixing, and stirring is carried out in a forced concrete mixer. The specific steps are as follows: : (1) Mix dry powder for 3 minutes; (2) Add industrial water and water reducer; (3) Mix for 5 minutes from low speed 0.5 m / s to high speed 2.5 m / s and then to low speed 1 m / s;
[0028] The final prepared cement composite mate...
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Abstract
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