Concrete for lining segment and preparation method for concrete

Abstract

The invention discloses concrete for a lining segment and a preparation method for the concrete, and belongs to the technical field of concrete products. The concrete is characterized in that the concrete for the lining segment is prepared from, by weight, 350-370 parts of cement, 1100-1200 parts of gravel, 700-720 parts of sand, 50-60 parts of coal ash, 4-6 parts of an anti-cracking agent, 5-6 parts of an additive and 120-130 parts of water; the anti-cracking agent is prepared by grinding calcium oxide expansion clinker, micro-silicon powder and redispersable emulsion powder, wherein the weight ratio of the calcium oxide expansion clinker to the micro-silicon powder to the redispersable emulsion powder is 6:3:1. By adopting the anti-cracking agent, the anti-cracking performance and anti-permeability performance of the concrete can be improved.

Description

technical field [0001] The invention relates to the technical field of concrete products, more specifically, it relates to a lining segment and a preparation method thereof. Background technique [0002] The lining segment is a tunnel lining assembled from prefabricated components in the factory or on the construction site. Because the reinforced concrete segment has good compressive strength, the processing is relatively simple and the precision is relatively high, so the reinforced concrete segment is used on the tunnel lining. The most widely used. [0003] Reinforced concrete segments are generally poured with concrete with a certain compressive strength, and the requirements for concrete performance are different according to the different places where they are used; since the load-bearing of lining segments is usually relatively large, by increasing the concrete strength level, it can Improve the compressive strength of the lining segment, but simply increasing the co...

AI Technical Summary

Problems solved by technology

[0003] Reinforced concrete segments are generally poured with concrete with a certain compressive strength, and the requirements for concrete performance are different according to the different places where they are used; since the load-bearing of lining segments is usually relatively large, by increasing the concrete strength level, it can Improve the compressive strength of the lining segment, but simply increasing the compressive strength of the concrete will often lead to an increase in the brittleness of the concrete. At high temperatures, it is easy to cause the concrete to burst, resulting in leakage and corrosion, especially for the lining pipe. Segments are usually placed underground and are susceptible to groundwater penetration, thereby accelerating the integrity of the lining segment, reducing its service life, and adversely affecting the safety and durability of the tunnel structure

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