Anti-erosion anti-corrosion concrete shield segment

Abstract

The invention discloses an anti-erosion anti-corrosion concrete shield segment. The concrete shield segment is prepared from the following components: 400 to 420 parts of ordinary Portland cement, 28 to 32 parts of fly ash, 45 to 47 parts of a multifunctional anti-erosion anti-corrosion agent, 540 to 580 parts of sand, 770 to 790 parts of gravel with a size of 5 to 25 mm, 140 to 150 parts of water, 5.5 to 5.9 parts of an additive, 110 to 120 parts of carbon fibers and 8 to 9.2 parts of a water reducing agent. According to the anti-erosion anti-corrosion concrete shield segment, a three-dimensional space network structure is formed in concrete through fibers, so the function of supporting aggregate is achieved, and sedimentation of coarse aggregate and fine aggregate is prevented to a certain degree; meanwhile, the bleeding phenomenon of a concrete surface is reduced, and large-volume shrinkage in a plastic period caused by rapid water loss of the concrete surface is effectively prevented, so cracks on the concrete surface in the plastic period are inhibited; and the multifunctional anti-erosion anti-corrosion agent remarkably improves the anti-erosion and anti-corrosion effects of the shield segment and avoids leakage.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to an anti-corrosion and anti-corrosion concrete shield segment. Background technique [0002] The shield segment is the main assembly component of shield construction and the innermost barrier of the tunnel, which bears the role of resisting soil pressure, groundwater pressure and some special loads. The production of shield segments usually uses high-strength impermeable concrete to ensure reliable load-bearing and waterproof performance. The production mainly uses the finished segment mold to form after sealing and pouring concrete. [0003] The corrosion resistance of concrete is poor, especially when it is used as a sewer pipe, it is easily corroded by acid and alkali, and its service life generally does not exceed twenty years. Poor load capacity and poor rigidity make it easy to be damaged under pressure, and the quality of the shield segment is directly related to the over...

AI Technical Summary

Problems solved by technology

[0003] The corrosion resistance of concrete is poor, especially when it is used as a sewer pipe, it is easily corroded by acid and alkali, and its service life generally does not exceed twenty years. Poor load capacity, poor rigidity, easy to be damaged under pressure, and the quality of the shield segment is directly related to the overall quality and safety of the tunnel, affecting the waterproof performance and load-bearing performance of the tunnel