High-strength modified synthetic fiber reinforced reactive powder concrete

Abstract

The invention discloses high-strength modified synthetic fiber reinforced reactive powder concrete. High-strength modified synthetic fibers are doped into the reactive powder concrete, wherein the content of the high-strength modified synthetic fibers in the reactive powder concrete is 0.1-100 kg / m3; the high-strength modified synthetic fiber is obtained by modifying synthetic resin or synthetic fiber with a modifier, wherein the active powder concrete is produced by taking cement, mineral admixtures and other active powder materials, fine aggregate, additives and water as raw materials. Due to the fact that polar groups such as Si, Si-O, -OH and -COOH are grafted to the surface of the synthetic fiber through the modifier, so that the groups react with active powder minerals in the activepowder concrete, and the strength, dispersion and binding power with the concrete of the fiber are greatly improved.

Description

Technical field [0001] The invention belongs to the field of materials, and relates to concrete materials, in particular to a reactive powder concrete reinforced by high-strength modified synthetic fibers. Background technique [0002] Traditional concrete is made of cement, sand, stone, and water, mixed in proportion and poured. However, traditional concrete has low strength, with a compressive strength of 15-60MPa and a flexural strength of 2-10MPa. This type of concrete is highly brittle and easy to crack, which greatly limits the application of concrete. With the continuous development of the construction industry, the engineering demand for high-strength and high-toughness concrete has become more and more urgent, so scientists have developed reactive powder concrete. Reactive powder concrete is concrete produced by mixing active powder materials such as cement and mineral admixtures, fine aggregates, admixtures, water and other raw materials. Compared with traditional con...

AI Technical Summary

Problems solved by technology

However, steel fibers are not only costly, but also easy to prick, rust and corrode

Traditional synthetic fibers are low in cost, non-sticky, and will not rust and corrode, but synthetic fibers have low strength and poor bonding with cement, so the reinforcing effect is generally lower than that of steel fibers

In addition, the reinforced reactive powder concrete requires a high content of fiber, and the traditional high content of fiber is difficult to disperse, so special mixing methods have to be used, or the amount of fiber can be reduced

Images