Preparation method of concrete containing modified cassava starch-polycarboxylic acid composite water reducing agent
A composite water reducing agent and tapioca starch technology, applied in the field of building materials, can solve the problems of difficulty in meeting green and environmental protection, low concrete strength requirements, and high production costs
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[0028] A preparation method for concrete containing modified tapioca starch-polycarboxylic acid composite water reducer, comprising the following steps:
[0029] S1: Add general-purpose Portland cement, fly ash, 75 parts of water, sodium carboxymethyl cellulose, sand and stones into a mixer and stir for 15 minutes to obtain a mixed solution A;
[0030] S2: Add the modified tapioca starch-polycarboxylate superplasticizer to the mixed solution A, stir for 5 minutes, and let it stand for 15 minutes to obtain the mixed solution B;
[0031] S3: Add ferrous sulfate to the mixed solution B, stir with a mixer for 4 minutes, and put it into the corresponding template.
[0032] The concrete comprises the following raw materials in parts by weight: 30-65 parts of general Portland cement, 60-130 parts of sand, 105-227.5 parts of stones, 12-40 parts of fly ash, carboxymethyl cellulose 5-9 parts of sodium, 0.5-1 part of modified tapioca starch-polycarboxylate superplasticizer, and 0.1-1 pa...
Embodiment 1
[0037] The preparation method of described concrete, comprises the following steps:
[0038] S1: Add general-purpose Portland cement, fly ash, 75 parts of water, sodium carboxymethyl cellulose, sand and stones into a mixer and stir for 15 minutes to obtain a mixed solution A;
[0039] S2: Add the modified tapioca starch-polycarboxylate superplasticizer to the mixed solution A, stir for 5 minutes, and let it stand for 15 minutes to obtain the mixed solution B;
[0040] S3: Add ferrous sulfate to the mixed solution B, stir with a mixer for 4 minutes, and put it into the corresponding template.
[0041] The concrete comprises the following raw materials in parts by weight: 45 parts of general Portland cement, 90 parts of sand, 157.5 parts of stones, 27 parts of fly ash, 7 parts of sodium carboxymethyl cellulose, modified tapioca starch - 0.6 parts of polycarboxylate superplasticizer, 0.4 parts of ferrous sulfate.
[0042] The modified tapioca-polycarboxylic acid composite water...
Embodiment 2
[0047] The preparation method of described concrete, comprises the following steps:
[0048] S1: Add general-purpose Portland cement, fly ash, 75 parts of water, sodium carboxymethyl cellulose, sand and stones into a mixer and stir for 15 minutes to obtain a mixed solution A;
[0049] S2: Add the modified tapioca starch-polycarboxylate superplasticizer to the mixed solution A, stir for 5 minutes, and let it stand for 15 minutes to obtain the mixed solution B;
[0050] S3: Add ferrous sulfate to the mixed solution B, stir with a mixer for 4 minutes, and put it into the corresponding template.
[0051] The concrete comprises the following raw materials in parts by weight: 65 parts of general Portland cement, 130 parts of sand, 227.5 parts of stones, 12 parts of fly ash, 9 parts of sodium carboxymethyl cellulose, modified tapioca starch - 1 part of polycarboxylate superplasticizer, 1 part of ferrous sulfate.
[0052] The modified tapioca starch-polycarboxylic acid composite wat...
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