Method for improving early strength performance of cement

Abstract

The invention discloses a method for improving early strength performance of cement, which is characterized in that a ternary composite early strength agent and a polycarboxylic acid water reducer are mixed into cement raw materials, so that the internal structure of the mixed cement is compact, the early performance of the cement material is enhanced, and on the basis of research on the single-doping early strength effect of nano-alumina, nano-alumina, AMPS and lithium sulfate are compounded, so that the early strength performance of the cement is improved. The early strength effect of the cement can be effectively improved by compounding the nano aluminum oxide, the AMPS and the lithium sulfate, and when the compound early strength agent comprises 0.15% of PC, 1.5% of the nano aluminum oxide, 0.15% of the AMPS and 1% of the lithium sulfate, and the water cement ratio is 0.4, the early strength of the cement is improved most remarkably.

Description

technical field [0001] The invention relates to the technical field of cement admixtures, in particular to a method for improving the early strength performance of cement. Background technique [0002] As one of the main energy sources in China, coal plays a vital role in economic development. The frequent occurrence of mine disasters has seriously affected the safety of coal mining. As my country pays more and more attention to coal mine safety issues, solving the gas outburst problem is the top priority of coal mine safety production. Drilling and drainage is one of the solutions to gas outbursts, and the efficiency of gas drainage is directly related to the quality of hole sealing. Cement-based sealing material is currently the most widely used sealing material for gas drainage. However, cement-based materials still have shortcomings, especially in the high temperature and high humidity environment of the mine, the setting time of the sealing material is unstable, the s...

AI Technical Summary

Problems solved by technology

However, cement-based materials still have deficiencies, especially in: the setting time of the sealing material is unstable in the high-temperature and high-humidity environment of the mine, the sealing is easy to crack in the later stage, the fluidity of the slurry is poor, and the compressive strength develops slowly or even cannot It is difficult to meet the increasing requirements of underground water fixation if it reaches the standard of work regulations

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