Low-slump-loss concrete and preparation method thereof
A slump loss, concrete technology, applied in the field of concrete, can solve the problems of reducing the bond strength between cement and sand, reducing the strength of concrete, and adverse effects of concrete compression, shrinkage, bending and wear resistance, etc. The effect of improving anti-cracking and impermeability, improving impermeability and high strength
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Embodiment 1
[0058] Embodiment 1: A kind of concrete with low slump loss is prepared through the following steps:
[0059] (1) Mix 30 parts of maleic anhydride, 1 part of azobisisobutyronitrile, 1 part of mercaptoethanol and 100 parts of deionized water evenly, heat up to 70°C, keep the temperature for 30 minutes, then heat up to 80°C, add 15 parts Styrene, 12 parts of acrylic acid, 25 parts of methyl methacrylate, 25 parts of ethyl acrylate and 22 parts of β-hydroxypropyl acrylate, heat preservation reaction for 2 hours, lowered to room temperature, adjusted pH to 7, and obtained a solid content of 20%. agent;
[0060] (2) Mix and stir 82 parts of naphthalene-based water reducer, 14 parts of modifier and 0.5 part of defoamer evenly, add 0.2 part of thickener and mix evenly to obtain a naphthalene-based modified water reducer;
[0061](3) Mix and stir 15 parts of slag, 100 parts of gravel, and 10 parts of clay to obtain a mixture; mix and stir the mixture with 50 parts of cement, 30 parts...
Embodiment 2
[0063] Embodiment 2: A kind of concrete with low slump loss is prepared through the following steps:
[0064] (1) Mix 33 parts of maleic anhydride, 1.5 parts of azobisisobutyronitrile, 1.5 parts of mercaptoethanol and 100 parts of deionized water, heat up to 70°C, keep the temperature for 30 minutes, then heat up to 80°C, add 17 parts Styrene, 14 parts of acrylic acid, 28 parts of methyl methacrylate, 27 parts of ethyl acrylate and 24 parts of β-hydroxypropyl acrylate, heat preservation reaction for 2 hours, lowered to room temperature, adjusted pH to 7, and obtained a solid content of 20%. agent;
[0065] (2) 84 parts of naphthalene-based water reducer, 16 parts of modifier and 0.8 part of defoamer were mixed and stirred evenly, and 0.3 part of thickener was added and mixed and stirred evenly to obtain a naphthalene-based modified water reducer;
[0066] (3) Mix and stir 18 parts of slag, 150 parts of gravel, and 15 parts of clay to obtain a mixture; mix and stir the mixture...
Embodiment 3
[0068] Embodiment 3: A kind of concrete with low slump loss, prepared by the following steps:
[0069] (1) Mix 35 parts of maleic anhydride, 2 parts of azobisisobutyronitrile, 2 parts of mercaptoethanol and 100 parts of deionized water, raise the temperature to 70°C, keep the temperature for 30 minutes, then raise the temperature to 80°C, add 18 parts Styrene, 15 parts of acrylic acid, 30 parts of methyl methacrylate, 28 parts of ethyl acrylate and 25 parts of β-hydroxypropyl acrylate, heat preservation reaction for 2 hours, lowered to room temperature, adjusted pH to 7, and obtained a solid content of 20%. agent;
[0070] (2) 85 parts of naphthalene-based water reducer, 18 parts of modifier and 1 part of defoamer were mixed and stirred evenly, and 0.4 parts of thickener were added and mixed and stirred evenly to obtain a naphthalene-based modified water reducer;
[0071] (3) Mix and stir 20 parts of slag, 200 parts of gravel, and 20 parts of clay to obtain a mixture; mix and...
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