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Modified cassava starch-polycarboxylic acid composite water reducing agent

A composite water reducing agent, tapioca starch technology, applied in the field of building materials, can solve problems such as difficulty in meeting green and environmental protection, product toxicity, non-biodegradable water reducing performance, etc.

Inactive Publication Date: 2020-07-07
NANNING TONGCAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a modified cassava starch-polycarboxylic acid composite water reducer to solve the existing problems in the prior art that the products are toxic, non-biodegradable and have low water-reducing performance, or discharge a large amount of toxic waste liquid during the production process, Technical problems that are difficult to meet the requirements of green and environmental protection

Method used

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  • Modified cassava starch-polycarboxylic acid composite water reducing agent

Examples

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Effect test

Embodiment 1

[0043] A modified tapioca starch-polycarboxylic acid composite water reducer, comprising the following raw materials in parts by weight: 20 parts of modified tapioca starch, 30 parts of sodium hydroxide, 4 parts of retarder, 2.5 parts of defoamer, primer Air agent 5.5 parts.

[0044] The retarder comprises the following components in parts by weight: 60 parts of sodium gluconate, 30 parts of sodium citrate, 29 parts of sodium tripolyphosphate, 19 parts of sodium pyrophosphate, 3 parts of ammonium borate, ferrous sulfate 2 parts, 5 parts of magnesium sulfate.

[0045] The defoamer includes the following components in parts by weight: 30 parts of hydrogen silicone oil, 40 parts of high-carbon alcohol fatty acid ester complex, 17 parts of polyoxyethylene polyoxypropylene pentaerythritol ether, octamethylcyclotetrasilane 10 parts of oxane, 5 parts of polyether silicone oil and 3 parts of polyoxypropylene polyoxyethylene glyceryl ether.

[0046] The air-entraining agent includes ...

Embodiment 2

[0054] A modified tapioca starch-polycarboxylic acid composite water reducer, comprising the following raw materials in parts by weight: 25 parts of modified tapioca starch, 100 parts of sodium hydroxide, 2 parts of retarder, 4 parts of defoamer, primer Air agent 3 parts.

[0055] The retarder comprises the following components in parts by weight: 48 parts of sodium gluconate, 32 parts of sodium citrate, 25 parts of sodium tripolyphosphate, 16 parts of sodium pyrophosphate, 5.5 parts of ammonium borate, ferrous sulfate 3 parts, 2.5 parts of magnesium sulfate.

[0056] The defoamer includes the following components in parts by weight: 50 parts of hydrogen silicone oil, 28 parts of high-carbon alcohol fatty acid ester complex, 14 parts of polyoxyethylene polyoxypropylene pentaerythritol ether, octamethylcyclotetrasilane 12 parts of oxane, 6.5 parts of polyether silicone oil and 4.5 parts of polyoxypropylene polyoxyethylene glyceryl ether.

[0057] The air-entraining agent incl...

Embodiment 3

[0065] A modified tapioca starch-polycarboxylic acid composite water reducer, comprising the following raw materials in parts by weight: 35 parts of modified tapioca starch, 120 parts of sodium hydroxide, 6 parts of retarder, 0.5 part of defoamer, primer Air agent 1 part.

[0066] The retarder comprises the following components in parts by weight: 43 parts of sodium gluconate, 37 parts of sodium citrate, 22 parts of sodium tripolyphosphate, 13 parts of sodium pyrophosphate, 8 parts of ammonium borate, ferrous sulfate 4 parts, 1 part of magnesium sulfate.

[0067] The defoamer includes the following components in parts by weight: 65 parts of hydrogen silicone oil, 20 parts of high-carbon alcohol fatty acid ester complex, 10 parts of polyoxyethylene polyoxypropylene pentaerythritol ether, octamethylcyclotetrasilane 15 parts of oxane, 9 parts of polyether silicone oil and 6 parts of polyoxypropylene polyoxyethylene glyceryl ether.

[0068] The air-entraining agent includes the ...

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Abstract

The invention discloses a modified cassava starch-polycarboxylic acid composite water reducing agent, and belongs to the field of building materials. The modified cassava starch-polycarboxylic acid composite water reducing agent is prepared from the following raw materials in parts by weight: 20 to 35 parts of modified cassava starch, 30 to 120 parts of sodium hydroxide, 2 to 6 parts of retarder,0.5 to 4 parts of defoaming agent and 1 to 5.5 parts of air entraining agent. The content of the modified cassava starch in the composite water reducing agent reaches 20% or above, and when the mixingamount of the water reducing agent is 0.3%, the coagulation time exceeds 24 h, and the requirement of the super retarder is met; and when the mixing amount of the composite water reducing agent is 1%, the initial fluidity of the cement paste is greater than 200mm. The development and application of the cassava starch water reducing agent are beneficial to improving the processing technology of the water reducing agent, improving the product quality of the water reducing agent and reducing the environmental pollution, and can effectively solve the problem of output of Guangxi agricultural products and improve the additional value of the products.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a modified tapioca-polycarboxylic acid composite water reducer. Background technique [0002] Water reducing agent is an essential and important component of ready-mixed concrete, and its consumption is increasing year by year with the acceleration of the urban process. In 2014, the output of cement in Guangxi was about 400 million tons, and based on the 0.2% dosage, 800,000 tons of water reducing agents were needed. The development of water reducing agent has provided more space for the development of the concrete industry. However, with the increasing emphasis on environmental protection, people have higher and higher requirements for building materials. While pursuing the realization of performance, they are more concerned about Whether building materials will cause harm to the environment or threaten personal safety, "green" building materials have become the general trend....

Claims

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Application Information

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IPC IPC(8): C04B24/16C08F251/00C08F220/06C08F220/44C08F228/02C08B31/18C04B103/30
CPCC04B24/168C04B2103/302C08B31/18C08B31/185C08F251/00C08F220/06C08F220/44C08F228/02
Inventor 吴丹陈霏韦红焰莫携娣
Owner NANNING TONGCAI TECH CO LTD
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