High-durability and high-bearing-capacity concrete segment

Abstract

The invention discloses a high-durability and high-bearing-capacity concrete segment, which comprises the following raw materials in part by mass: 685 to 760 parts of common silicate cement, 110 to 130 parts of silicon powder with an average particle size of 0.30 mu m and a SiO2 content of more than or equal to 92 percent, 68 to 85 percent of I-grade fly ash with a K value of more than or equal to 0.8, 1,100 to 1,190 parts of quartz sand with a particle size between 0.16 to 1.25mm, 13 to 15 parts of superplasticizer, 165 to 190 parts of water, and 90 to 150 parts of copper-plated steel fibers with a diameter between 0.18 and 0.25mm and a length between 11 and 15mm. The preparation process of the segment is to uniformly stir the steel fibers and fine quartz sand, the concrete, silicon powder, fly ash and 30 percent of water, the rest water and superplasticizer in turn to obtain a reactive powder concrete (RPC) mixture. The concrete segment has high antifatigue and corrosion-resistance performance; and under the same load, the cross section thickness of the segment prepared by the method is small, and steel used as building material can be saved.

Description

technical field [0001] The invention relates to a high-durability, high-bearing-capacity concrete segment applied to tunnels and subways, and also relates to a preparation method of the segment. Background technique [0002] With the rapid development of my country's economy, the construction of railways, road tunnels, and urban subways has increased rapidly, and the demand for concrete segments suitable for the construction of railways, road tunnels, and urban subways has also increased. In order to improve the durability and bearing capacity of concrete segments, most of the existing concrete segments are based on the existing concrete materials by increasing the amount of steel and increasing the thickness of the segments to improve their load resistance and impermeability. The technical measures make the segment heavy and uneconomical, and the construction cost is very high. The more critical segment has little effect on resisting high cold, high alkali and high sulfate,...

AI Technical Summary

Problems solved by technology

In order to improve the durability and bearing capacity of concrete segments, most of the existing concrete segments are based on the existing concrete materials by increasing the amount of steel and increasing the thickness of the segments to improve their load resistance and impermeability. The technical measures make the segment heavy and uneconomical, and the construction cost is very high. The more critical segment has little effect on resisting high cold, high alkali and high sulfate, and the maintenance cost is high during the operation of the project, and the durability is poor