Fiber for cement concrete

Abstract

The invention discloses a fiber for cement concrete, which comprises the following constituents that the water cement ratio is 0.35-0.45; the glue sand ratio is 1:0.5-1:1.2; the content of high-efficiency expansive agent is 8-10 percent of the dosage of cement; the content of the high-efficiency water reducing agent is 0.5-1 percent of the dosage of the cement; and the content of polypropylene fibers is 1 m, and 0.8-1.2kg of the polypropylene fibers are doped in sand pulp. The invention also discloses a production method of the fiber. The fiber is a high-strength prestressed anchor grouting material having high rupture strength, compressive strength and tensile strength, small brittleness, good cracking resistance and impermeability and high bonding shearing strength and bondability strength.

Description

technical field [0001] A fiber for cement concrete, specifically relates to a polypropylene fiber cement mortar, and also relates to a production method of the polypropylene fiber cement mortar. Background technique [0002] At present, there are mainly the following types of prestressed anchor grouting materials: [0003] (1) The ultra-fine cement developed during the "Seventh Five-Year Plan" period has an average particle size of 4 μm and a specific surface area of ​​800 cm 2 / g or more, it can be used to inject rock fractures with a width of 0.06mm. [0004] (2) Developed wet-ground cement; it can be ground at any time, compared with ordinary cement, it has good water-separation stability, higher impermeability and mechanical strength, and greatly improved groutability. [0005] (3) Developed a modified grouting cement material: its characteristic is to optimize the gradation composition of cement particles, not simply to pursue the fineness of particles. [0006] (4) ...

AI Technical Summary

Problems solved by technology

[0011] Although the above grouting materials have certain advantages, their comprehensive properties are not ideal.