Low carbon and high performance series concrete special for tunnel linings

Abstract

The invention provides a low carbon and high performance series concrete special for tunnel linings. The concrete is prepared by mixing different mineral admixtures of different mixing amounts and adopting a low water-binder ratio and a high efficiency water reducer, and has the characteristics of fewer initial cracks, high density, good workability and durability. While using the product provided in the invention, the lining concrete density can be determined according to an environmental comprehensive level, then a gelling material formula is selected according to a density index. The concrete strength grade is determined according to a surrounding rock grade, and then the concrete mix proportion is selected according to the strength grade. Due to a large mixing amount of mineral admixtures, which can reach 65% at most in the gelling material, the ratio of cement in the gelling material is substantially reduced, and at the same time the clinker consumption and yield are also reduced. Thus, the energy is saved, carbon emission is reduced, and environmental pollution is reduced, thus benefiting environmental protection. Meanwhile, the industrial waste residue can be efficiently utilized.

Description

technical field [0001] The invention relates to building materials, in particular to a tunnel lining structure concrete material specially used in different environments and different surrounding rock grades. Background technique [0002] With the rapid development of high-speed railways, urban underground railways, and high-grade highway construction, the number of tunnel constructions has increased dramatically, and as the tunnel structures are put into use, their durability problems have gradually become prominent, seriously affecting the service life of the structures. Therefore, the durability design and construction of the tunnel structure has attracted the attention of relevant experts and scholars. To improve the durability of the tunnel structure, we should first work hard on the material. After a lot of experimental research, we have found a set of low-carbon, green high-performance concrete. Broad Spectrum Formula. With the development of high-performance concret...

AI Technical Summary

Problems solved by technology

When the tunnel passes through different levels of surrounding rock, the loads acting on the structure vary. The worse the surrounding rock, the greater the load, and the better the surrounding rock, the smaller the load. The traditional design strategy is to increase the structural bearing capacity by increasing the thickness of the lining concrete, resulting in The amount of tunnel excavation and masonry will increase, which will increase the cost of the project, which is neither economical nor environmentally friendly

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