Ultrafine anti-segregation grouting material and preparation method thereof

Abstract

The invention relates to an ultrafine segregation-resistance injecting paste material and a preparation method thereof. The ultrafine segregation resistance injecting paste material comprises the following ingredients by mass percentage: 76.56-90.96% of P.O52.5 cement, 1.5-6.8% of 42.5 grade low alkali sulphoaluminate cement; 0.51-2.3% of CA50 aluminate cement; 0.26-1.16% of desulfurized gypsum, 3.0-6.0% of silicon ash; 3.0-6.0% of ultrafine ore powder; 0.6-0.9% of naphthalene high efficiency water reducer; and 0.062-0.094% of carboxylic group-containing sulfamate water reducer. The environment-friendly type ultrafine segregation-resistance injecting paste material can complete the paste injecting according to water-binder ratio of 0.40-0.45 by fully stirring while in use. The slurry has the advantages of no deposition, no separation, no exudation and good maneuverability, almost no loss for fluidity for 1 hour is generated, long-term strength of the slurry is high, the slurry has self-slight expansion function, and has good endurance performance.

Description

technical field [0001] The invention relates to a grouting material, in particular to an environment-friendly ultrafine segregation-resistant grouting material for pressure grouting. Background technique [0002] Most of the traditional coal mine roadway water blocking and reinforcement grouting materials use cement slurry materials and water glass for grouting. Afterwards, a chemical sodium ion reaction is produced, and sodium directly destroys the structure of hardened cement stone, so it causes the phenomenon of secondary water reappearance and pollutes groundwater sources. Since the early 1970s, the United States and Japan have banned the use of water glass grouting. Organic materials such as polydilute amide and lignin grouting single-performance materials are very difficult to solve water injection. Moreover, organic grouting materials have poor durability and are toxic, which will cause environmental damage. Pollution is also expensive. [0003] At present, there ar...

AI Technical Summary

Problems solved by technology

In the process of preparing grouting materials on site, the ultrafine mineral carrier is easy to agglomerate, it is difficult to mix evenly, and the expected effect cannot be achieved, and the slurry of the grouting material is prone to precipitation, segregation, bleeding, etc., which is not conducive to the grouting operation The flow properties of the grouting slurry are difficult to meet the requirements of the grouting process, which is manifested by a large loss of fluidity over time; in order to control the loss of fluidity, super-mixed retarding components are often used to achieve it, so the injection Super-retarded setting of slurry cannot achieve the desired effect of grouting; due to the large water-binder ratio, the slurry shrinks severely and cannot achieve the effect of grouting plugging

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