Cement grinding aid

A technology of cement grinding aid and sodium sulfate, which is applied in the field of cement and can solve the problems of long concrete setting time and low concrete strength

Inactive Publication Date: 2016-01-13
重庆市南川区海峰水泥有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a cement grinding aid to solve th

Method used

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Experimental program
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Embodiment Construction

[0007] Cement grinding aids are configured according to the components and parts by mass in Table 1, Table 2, and Table 3 below.

[0008]

[0009] Table 1

[0010]

[0011]

[0012] Table 2

[0013]

[0014] table 3

[0015] In the above tables, the processing steps are:

[0016] Step 1: At a temperature of 30 degrees Celsius, filter out impurities from the quality pulp waste liquid, add triethanolamine to homogenize (stir well) for 15 minutes, then add urea and ammonium acetate, homogenize for 15 minutes, and then add unsaturated Synthetic polyester resin, the unsaturated polyester resin in this scheme adopts isophthalic unsaturated polyester resin, homogenized for 20 minutes.

[0017] The second step: After mixing and stirring the carboxymethyl cellulose and the sodium sulfate passing the 180 mesh evenly, the mixture is mixed into the components of the first step and stirred evenly again, and the stirring time is 10 minutes . Then store and stop for 24 hours...

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Abstract

The invention discloses a cement grinding aid. The cement grinding aid contains the ingredients in parts by mass: 4-20 parts of triethanolamine, 5-20 parts of ethylene glycol, 5-10 parts of ammoniom acetate, 18-23 parts of urea, 3-5 parts of unsaturated polyester resin, 30-40 parts of paper pulp waste lye, 4-12 parts of carboxymethyl cellulose and 5-10 parts of sodium sulfate. According to the cement grinding aid, carboxymethyl cellulose and sodium sulfate are added based on the original cement grinding aid, and carboxymethyl cellulose in the grinding aid can be used for overcoming the phenomenon of powder agglomeration and improving the gradation of granules. Sodium sulfate can be used for accelerating the hydrating and hardening speed of cement, and the degree of hydration of the cement can be increased through using sodium sulfate and triethanolamine in a matched manner. The condition that the fluidity and cohesion of the cement granules are not high can be changed through using carboxymethyl cellulose and sodium sulfate in a matched manner, the fluidity of cement powder can be improved by hydrophobic groups in carboxymethyl cellulose and hydrophilic group molecules in sodium sulfate, and the powder material can be fully ground, so that the fineness and strength of the cement can be improved.

Description

technical field [0001] The invention relates to the field of cement, in particular to a cement grinding aid. Background technique [0002] Cement grinding aid is an additive that is added to the mill during the cement grinding process to help the grinding without damaging the performance of cement. It can change the dispersion of materials inside the mill and the flow rate of cement, improve the conveying efficiency of cement, and effectively eliminate the phenomenon of electrostatic adsorption of cement fine particles and ball paste grinding, and can increase the output of the mill by about 20%. , while effectively reducing over-grinding, optimizing cement particle gradation, and reducing cement sieve residue. The composite grinding aid also contains an activator that stimulates the potential activity of cement admixtures such as fly ash and slag powder, so as to increase the strength of cement, increase the amount of admixtures in cement production, and reduce the amount ...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B22/14C04B103/52
Inventor 丁微
Owner 重庆市南川区海峰水泥有限公司
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