Preparation method of concrete containing modified cassava starch-polycarboxylic acid composite water reducing agent

Abstract

The invention discloses a preparation method of concrete containing a modified cassava starch-polycarboxylic acid composite water reducing agent, and belongs to the field of building materials. The preparation method of the concrete comprises the following steps: adding the general portland cement, the fly ash, 75 parts of the water, the sodium carboxymethyl cellulose, the sand and the stones intoa stirrer and stirring for 15 minutes; adding the modified cassava starch-polycarboxylate superplasticizer, stirring for 5 minutes, and standing for 15 minutes; and adding ferrous sulfate into a ferrous sulfate stirrer, stirring for 4 minutes, and putting into a corresponding template to obtain the product. The concrete preparation method provided by the technical scheme has the advantages of easiness in operation, easiness in large-scale production and the like; the obtained concrete is smooth in appearance and good in durability, sand holes and air holes are not formed in the surface of theconcrete, and good mechanical properties such as high compressive strength are achieved.

Description

technical field

[0001] The invention relates to the field of building materials, in particular to a method for preparing concrete containing modified tapioca starch-polycarboxylic acid composite water reducing agent. Background technique

[0002] Due to the defects in the formula and production process of traditional concrete, there are generally small pores and trachoma, which affect its appearance and also affect its use function. Depression occurs, if the amount of spray paint is increased, it will not only affect the appearance, but also the drying time of the paint will be different, which will affect the progress of the project. The board with air bubbles has poor water absorption performance, the surface of the board is easy to crack, poor durability, frost resistance, impermeability ability is greatly reduced. Therefore, reasonable selection of process flow, optimization of process parameters, correct operation, and control of operating system are of great significa...

Examples

preparation example Construction

[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...

technical field

[0001] The invention relates to the field of building materials, in particular to a method for preparing concrete containing modified tapioca starch-polycarboxylic acid composite water reducing agent. Background technique

[0002] Due to the defects in the formula and production process of traditional concrete, there are generally small pores and trachoma, which affect its appearance and also affect its use function. Depression occurs, if the amount of spray paint is increased, it will not only affect the appearance, but also the drying time of the paint will be different, which will affect the progress of the project. The board with air bubbles has poor water absorption performance, the surface of the board is easy to crack, poor durability, frost resistance, impermeability ability is greatly reduced. Therefore, reasonable selection of process flow, optimization of process parameters, correct operation, and control of operating system are of great significa...

Examples

preparation example Construction

[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...

Images