Cement-based polymer cementing material for duct piece repairing and duct piece repairing method

Abstract

The invention provides a cement-based polymer cementing material for duct piece repairing and a duct piece repairing method. The material is prepared from the following components in percentage by weight: 55.5 to 58.8 percent of tailing slag; 30 to 35 percent of ordinary Portland cement; 8 to 10 percent of white cement; 0.9 to 1.2 percent of redispersible rubber powder; and 0.3 percent of cellulose ether. The duct piece repairing method comprises the following steps of: S1, estimating the total weight of a required cement-based polymer cementing material, and pouring the material into a container; S2, adding water into the container, the ratio of the cement-based polymer cementing material to the water being 1: 2.5, and stirring an obtained mixture until the mixture is fully wetted and uniform; S3, smearing / filling a to-be-repaired area with the mixture so as to complete the repairing of a duct piece. The material is high in setting and hardening speed and repairing strength; and the repairing method is simple and convenient and can shorten the waiting time of a repaired duct piece and increase the delivery speed of the duct piece.

Description

technical field [0001] The invention belongs to the field of construction engineering, and in particular relates to a cement-based polymer cementitious material for segment repair and a segment repair method. 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. Bubbles and cracks will inevitably occur on the surface of the segment during the production process; bumps will inevitably occur during the transfer and stacking process, causing the segment to lose edges and corners. Missing edges and corners are repaired; the existing ordinary cement-based repair m...

AI Technical Summary

Problems solved by technology

Bubbles and cracks will inevitably occur on the surface of the segment during the production process; bumps will inevitably occur during the transfer and stacking process, causing the segment to lose edges and corners. Missing edges and corners are repaired; the existing ordinary cement-based repair materials have a long time to set and harden the cement, resulting in slow repair speed and low factory efficiency, making it difficult to achieve the desired effect