Basalt fiber reactive powder concrete and preparation method thereof

Abstract

The invention discloses basalt fiber reactive powder concrete and a preparation method thereof. The concrete is prepared from the following raw materials in parts by weight: 730 to 800 parts of cement, 240 to 290 parts of silica fume, 390 to 400 parts of quartz sand fine sand, 624 to 640 parts of quartz sand medium sand, 230 to 260 parts of quartz powder, 140 to 170 parts of water, 50 to 52 partsof a water reducing agent and 4 to 8 parts of basalt fibers. The axial compressive strength of the basalt fiber reactive powder concrete is close to that of steel fiber reactive powder concrete, and the breaking strength of the basalt fiber reactive powder concrete is greater than that of the steel fiber reactive powder concrete. According to the method disclosed by the invention, the dry materialand the basalt fibers are firstly mixed and stirred, so that the basalt fibers are promoted to be fully dispersed during stirring, the stirring time is shortened, and the strength of the basalt fiberreactive powder concrete is improved.

Description

technical field [0001] The invention relates to a key technology of high-performance concrete with high axial compressive strength and high flexural strength prepared by using basalt fiber and active powder. Specifically, it relates to a basalt fiber active powder concrete and a preparation method. Background technique [0002] With the advancement of structural theory and the development of construction technology, bridges are developing in the direction of large span, light weight and high strength. The disadvantages of ordinary concrete, such as heavy weight, higher compressive strength than tensile strength, poor deformation capacity and brittle failure, limit the application of concrete in bridge structures. Reactive powder concrete is a high-strength, high-durability cement-based material. Compared with ordinary concrete, reactive powder concrete is added with active powder such as mineral admixtures and admixtures. A denser gradation can be formed between the mineral...

AI Technical Summary

Problems solved by technology

The high production cost and poor corrosion resistance of steel fibers will affect the ion erosion resistance of reactive powder concrete and reduce the service life of reactive powder concrete in harsh environments

Synthetic fibers can avoid the problems caused by steel fibers, but the combination of synthetic fibers and cement is poor, and the gain effect is low. High content of fibers is often required to enhance the performance of reactive powder concrete, and high content of fibers is difficult to disperse , a special mixing method must be used

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