Basalt fiber reactive powder concrete suitable for seasonal frozen area

Abstract

Basalt fiber reactive powder concrete suitable for a seasonal freezing area is prepared from the following raw materials in parts by weight: 814 to 854 parts of cement, 198 to 220 parts of silica fume, 901 to 950 parts of quartz sand, 159 to 171 parts of water, 51 to 53 parts of a water reducing agent and 4 to 12 parts of basalt fiber. According to the invention, quartz sand is used as aggregate,the internal structure is more compact, gaps are smaller and do not communicate with each other, the concrete is not easily eroded by the outside, and the chloride ion erosion resistance of the concrete is improved. The used cement amount is small, the CO2 emission amount is small, and the environmental protection requirement is met. The doped basalt fibers and concrete are silicate materials andhave natural compatibility, so that the basalt fibers can be more easily and uniformly dispersed in the concrete. The micro-reinforcement effect of the basalt fibers on the concrete can inhibit the development of concrete cracks and reduce water entering the concrete, so that the frost resistance of the concrete is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a basalt fiber active powder concrete suitable for seasonally frozen regions. Background technique [0002] In actual engineering in seasonally frozen areas, concrete materials are exposed to complex environmental conditions, and concrete freeze-thaw damage is a common disease in concrete structural engineering in seasonally frozen areas. However, concrete in seasonally frozen areas is not only damaged by freezing and thawing, but also often corroded by chloride salts due to the use of deicing agents. Freezing and thawing cycles can also promote the diffusion of chloride ions in the active powder. Freezing-thawing and chlorine salt erosion work together to cause damage to concrete materials, degrade the performance of concrete structures, seriously affect the safety and durability of concrete structures, and cause huge economic losses and casualties in seve...

AI Technical Summary

Problems solved by technology

[0003] The application of steel fiber modified active powder concrete can improve the frost resistance of concrete to a certain extent, but steel fiber, as a kind of metal fiber, is very easy to be corroded in acid-base solution or even in the air, and its corrosion resistance is poor. The production process of steel fiber is accompanied by a large amount of industrial wastewater and pollutants, which is not conducive to the healthy development of the ecological environment

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