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A Grinding Aid for Improving the Compatibility of Cement and Water Reducer

A water-reducing agent and compatibility technology, applied in the field of cement grinding aids, can solve problems such as the adverse effect of cement strength, and achieve the effects of improving compatibility, slowing down hydration rate, and enhancing use effect.

Active Publication Date: 2020-05-05
安徽海螺材料科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, air-entraining agents have an adverse effect on cement strength

Method used

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  • A Grinding Aid for Improving the Compatibility of Cement and Water Reducer
  • A Grinding Aid for Improving the Compatibility of Cement and Water Reducer
  • A Grinding Aid for Improving the Compatibility of Cement and Water Reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A grinding aid for improving the compatibility of cement and water reducer in this embodiment, including the following percentages by weight: 20% to 25% of diethanol monoisopropanolamine or triisopropanolamine, and 10% of inorganic salt ~15%, methylene succinic acid industrial waste liquid 20%~30%, and the balance is water. The processing method of this grinding aid is to sequentially mix water, diethanol monoisopropanolamine or triisopropanolamine, The inorganic salt is added to the methylene succinic acid industrial waste liquid, and stirred evenly. The grinding aid is suitable for ordinary Portland cement, fly ash cement and composite Portland cement, and the dosage is 0.10%.

[0016] The methylene succinic acid industrial waste liquid used in this example is the waste liquid produced by the fermentation method. The methylene succinic acid is also called itaconic acid, and the methylene succinic acid industry Waste liquid includes reducing sugar (about 23%-25%), ino...

Embodiment 2

[0034] A grinding aid for improving the compatibility of cement and water reducer in this embodiment includes the following percentages by weight: 20% triisopropanolamine, 15% inorganic salt, 25% methylene succinic acid industrial waste liquid %, the balance is water.

[0035] The processing method of this grinding aid is identical with embodiment 1.

Embodiment 3

[0037] A grinding aid for improving the compatibility of cement and water reducer in this embodiment, including the following percentages by weight: 24% diethanol monoisopropanolamine, 12% inorganic salt, methylene succinic acid industrial waste Liquid 20%, the balance is water.

[0038] The processing method of this grinding aid is identical with embodiment 1.

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Abstract

The invention relates to the technical field of cement grinding aids, in particular to a grinding aid for improving compatibility of cement and a water reducing agent. The grinding aid is prepared from, by weight, 20%-25% of diethanolisopropanolamine, 10%-15% of inorganic salt, 20%-30% of itaconic acid industrial effluent and the balance water. In use of the grinding aid, cement hydration can be decelerated, and cement paste is high in fluidity relatively and conducive to actions of the water reducing agent; since itaconic acid is binary unsaturated carboxylic acid, the itaconic acid is easier to compatible to a polycarboxylic water reducing agent according to the principle that the similar substances are more likely to be dissolved by each other, and a polymerization reaction between the itaconic acid and excessive macromonomers in the polycarboxylic water reducing agent can be realized under appropriate conditions to increase effective components of the polycarboxylic water reducing agent, so that effectiveness in use of the water reducing agent is improved. Therefore, compatibility of cement and the concrete water reducing agent is improved on the premise that grinding efficiency and cement strength are almost unchanged.

Description

technical field [0001] The invention relates to the technical field of cement grinding aids, in particular to a grinding aid for improving the compatibility of cement and water reducers. Background technique [0002] Grinding aids and water reducers are commonly used additives in the cement industry, that is, grinding aids need to be added during cement production, and water reducers need to be added when cement is used. [0003] Cement grinding aids can significantly increase the output of cement table, the strength of cement of all ages, and improve its fluidity. It can also significantly improve the fluidity of cement, improve the grinding effect of the mill and the powder selection efficiency of the powder separator, thereby reducing the energy consumption of grinding. The water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of the concrete. The water reducing agent can disperse the cement particles after being ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/12C04B103/52
CPCC04B40/0039C04B2103/52C04B24/122C04B22/08C04B22/0046
Inventor 邹君谭静进
Owner 安徽海螺材料科技股份有限公司
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