Composite concrete grinding-assistant reinforcing agent

Abstract

The invention discloses a composite concrete grinding-assistant reinforcing agent which is prepared by using the following methods: adding 500kg of polycarboxylic acid copolymer, 90kg of triisopropanolamine, 100kg of triethanolamine, 40kg of propanediol and 70kg of glycol into a reaction container; heating to 50-60 DEG C; stirring for 0.5-1.5 hours to uniformly mix to prepare a mixture No.1; adding 50kg of esterifying agent, 250kg of carbamide, 180kg of calcium formate and 20kg of adjusting solidification agent into 700kg of water; fully stirring for 0.5-1.0 hour at 50 DEG C-60 DEG C to prepare a mixture No.2; and keeping the temperature of the mixture No.1 at 50 DEG C-60 DEG C, slowly pouring the mixture No.2 into the No.1 mixture while stirring; fully stirring for 0.5-1.5 hours to obtain the composite concrete grinding-assistant reinforcing agent which is brown liquid and hardly precipitates. The invention has the advantages of favorable stability performance, no influence on cementcondensation time, electricity saving, chlorine free, enhancement, simple use, low doping content, small investment and the like, improves output table yield of the cement by 15 percent to 30 percentand improves the age strength of the cement.

Description

technical field [0001] The invention relates to a composite grinding aid used in cement production, in particular to a composite cement grinding aid enhancer. Background technique [0002] my country's cement production accounts for half of the world's output. my country is still in the initial stage of modernization, and decades of large-scale construction are still needed. The demand for building materials, including cement, will remain at a relatively high level. Since cement production is an industry with high resource consumption and high energy consumption, the consumption of limestone resources is high, and the energy consumption of coal and electricity is large, which will cause serious greenhouse gas emissions. These problems seriously affect the sustainable development of the economy. The state vigorously advocates energy conservation and emission reduction, comprehensive utilization and recycling of resources, and the establishment of a circular economy. Cement...

AI Technical Summary

Problems solved by technology

The recent national cement standard stipulates that the chloride ion content in cement should not exceed 0.06%, limit the amount of alkali, strictly prohibit the use of chemical components that are harmful to cement performance and harmful to human health to produce cement additives, and the amount of cement additives must be Less than 0.5% of the weight of cement, so the traditional powder-enhanced grinding aids based on sodium chloride and high alkali will be discontinued

Moreover, although traditional grinding aids improve the early strength of cement, the later strength is poor. It is necessary to develop new cement grinding aids that are multifunctional, compound and efficient, and have no side effects on the human body and cement products.

[0003] 3 days and 7 days, the strength increase is not obvious, unstable, the output per hour is not obvious, the high temperature is easy to volatilize, the product function is single, and the cement fluidity and setting time are affected

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