Anti-cracking large-size early-strength, high-strength and micro-expansion M grouting material and construction method thereof

Abstract

The invention discloses an anti-cracking large-size early-strength, high-strength and micro-expansion M grouting material which comprises cement, sand, an early strength agent, a water reducing agent and an expanding agent, and is characterized in that the cement refers to P.II 52.5R, has the amount of 440kg in each tonnage of the M grouting material and has a mix proportion of 1; the sand refers to medium sand, has the amount of 492kg in each tonnage of the M grouting material and has a mix proportion of 1.12; the early strength agent refers to calcium formate, has the amount of 10kg in each tonnage of the M grouting material and has a mix proportion of 0.02; the water reducing agent refers to poly-acid, has the amount of 5kg in each tonnage of the M grouting material and has a mix proportion of 0.01; and the expanding agent refers to a calcium sulphoaluminate expanding agent, has the amount of 53kg in each tonnage of the M grouting material and has a mix proportion of 0.12. The anti-cracking large-size early-strength, high-strength and micro-expansion M grouting material and the construction method thereof disclosed by the invention have the advantages that the M grouting material is simple and practical in preparation, high in operability and obvious in anti-cracking effect and is especially suitable for short-construction-period high-strength large-size grouting material engineering projects for on-line transformation, maintenance and rush repair.

Description

technical field

[0001] The invention relates to a grouting material for foundation engineering, in particular to a large-volume grouting material and a construction method thereof. Background technique

[0002] The grouting material has many advantages such as early strength, high strength, micro-expansion, high fluidity, and convenient use. Compared with the traditional fine stone concrete, it has the characteristics of better fluidity, higher strength and easy construction control. It is different from the traditional environment. Compared with oxygen mortar, it has the characteristics of good expansion, simple and fast construction. In construction, it can improve the installation accuracy of equipment, speed up installation and prolong the service life of equipment, etc. It is often used for anchoring of anchor bolts, secondary grouting of equipment, reinforcement and transformation of concrete structures.

[0003] Commonly used grouting materials are generally cement-b...

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