Cement grinding aid and application thereof

A cement grinding aid and modification technology, which is applied in the field of chemical building materials, can solve problems such as difficulty in meeting homogeneity index requirements, unfavorable cement stone structure growth, and large differences in strength growth, so as to reduce environmental burdens, ensure strength, Take full advantage of the effect

Inactive Publication Date: 2018-06-12
襄阳海螺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Some of the grinding aids currently on the market contain a large amount of inorganic salts, Cl - , from the perspective of cement hydration and hardening, it is not conducive to the structural growth of cement stone, and even shrinks the long-term strength. In addition, cl - It can also cause steel bar corrosion, or it needs to combine many kinds of substances, and the compounding process of grinding aid determines the combination of more materials, which will affect each other, and it is difficult to meet the requirements of its homogeneity index, and the change of ambient temperature will aggravate this. The combination of various materials mainly utilizes the superimposed effects of the materials on the hydration stages and hydration phases of cement, and the different clinker mineral phase compositions will have different excitation degrees at different ages of cement, resulting in Intensity growth varies greatly across ages

Method used

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  • Cement grinding aid and application thereof
  • Cement grinding aid and application thereof
  • Cement grinding aid and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A cement grinding aid, the cement grinding aid is made of the following raw materials in mass percentage: 16% of modified propanolamine, 5% of polymerized glycerin, 7% of sweet raisin molasses, the rest is water, and the grinding aid of foreign brands Agent Grace, Sika comparative test.

[0025] The implementation cases are as follows:

[0026] 1) Take the clinker, mixed materials and gypsum used in the production of a certain factory, and put them into the uniform test small mill in the laboratory. After 27 minutes of grinding time, the sampling test shows that the 45μm and 80μm sieves are 14.2% and 2.7%, respectively, and the specific surface area is 3953cm 2 / g; then carry out the mortar strength test according to GB / T17671-1999 "Cement Mortar Strength Test Method (ISO Method)", add the recommended dosage of grinding aid into the test mixing water, and check the cement 3d and 28d age. The compressive strength, the test results are as follows:

[0027]

[0028] ...

Embodiment 2

[0033] A cement grinding aid, which is made of the following raw materials in mass percentage: 10% of modified propanolamine, 1% of polyglycerin, 5% of sweet molasses, and the rest is water.

[0034] The implementation cases are as follows:

[0035] Take clinker, mixed materials and gypsum for production in a certain factory, according to the method in Appendix A of GB / T 26748-2011 "Cement Grinding Aids", add new grinding aid tablet B, grind for the same time (27min), check the cement fineness Then, according to GB / T17671-1999 "Cement mortar strength test method (ISO method)", the mortar strength test is carried out to test the compressive strength of cement at 3d and 28d ages, and the test results are as follows:

[0036]

[0037] Test results and discussion: Compared with the blank cement mixed with the new grinding aid B, the sieve allowances of 45 μm and 80 μm decreased by 4.6% and 1.1% respectively, and the compressive strength of cement increased by 3d and 28d respect...

Embodiment 3

[0039]A cement grinding aid is made of the following raw materials in mass percentage: 30% of modified propanolamine, 6% of polymerized glycerin, 15% of sweet molasses, and the rest is water.

[0040] The implementation cases are as follows:

[0041] Take the clinker, mixed materials and gypsum used in the production of a certain factory, according to the method in Appendix A of GB / T 26748-2011 "Cement Grinding Aids", add new grinding aid C, grind for the same time (27min), and check the cement fineness Change; then according to GB / T17671-1999 "Cement mortar strength test method (ISO method)", the mortar strength test is carried out to test the compressive strength of cement at 3d and 28d ages, and the test results are as follows:

[0042]

[0043] Test results and discussion: Compared with the blank cement mixed with the new grinding aid C, the sieve allowances of 45 μm and 80 μm were reduced by 5.8% and 1.3% respectively, and the compressive strength of the cement was inc...

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Abstract

The invention provides a cement grinding aid and application thereof. The cement grinding aid is prepared from, by mass, 10-30% of modified propanolamine, 1-6% of polymerized glycerin, 5-15% of beet molasses and the balance of water. The cement grinding aid is applied in home decoration cement and added into a mill along with materials in the process of grinding the home decoration cement. Modified propanolamine is a known material having best effect on activating strength of cement at each age and is better in adaptability than a polyol and alcohol amine combination; the effect of modified propanolamine on activating the strength at each age is in gradually increasing tendency, so that it is ensured that growing at each age meets expectation; the beet molasses is industrial waste, so thatcomprehensive utilization of industrial waste can be improved, and emission and environment burden is reduced. Cement strength can be ensured, and the industrial waste is fully utilized.

Description

technical field [0001] The invention relates to the technical field of chemical building materials, in particular to a cement grinding aid and its application. Background technique [0002] When the cement clinker is ground, an admixture that acts as a grinding aid and does not harm human health and the performance of cement concrete is called a cement grinding aid. In the field of grinding aid application and cement production, in the grinding process, it can neutralize the unsaturated electricity price, form a gas film on the surface of cement particles, promote crack propagation and reduce the interfacial lattice cohesion. From a microscopic point of view, increase Particle dispersion and avoid agglomeration, the flow velocity of the used material particles in the mill is accelerated, and at the same time, the adsorption on the lining of the mill cylinder and the grinding body is reduced. From the perspective of grinding efficiency, grinding aids promote the improvement ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C04B7/52C04B103/52
CPCC04B7/52C04B40/0039C04B2103/52C04B24/122C04B24/32C04B24/001
Inventor 邹君李渊博江元华叶兵明金龙
Owner 襄阳海螺新材料科技有限公司
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