A kind of filling material and its construction method for the expansion joints of the concrete face of the rockfill dam

Abstract

The invention relates to the technical field of hydraulic construction and particularly relates to a packing material for an expansion joint of a concrete facing rockfill dam and a construction method of the packing material. The packing material is prepared from the following components in parts by weight: 100 parts of petroleum asphalt, 50-60 parts of kerosene, 70-80 parts of asbestos mud and 45-50 parts of rubber powder. The packing material has the advantages of being available in materials and wide in application range, has good elasticity, cohesiveness and plasticity, and is capable of uniformly bestrewing the whole concrete surface; and the material has good adhesive force and can meet the construction quality requirements of a vertical construction joint.

Description

technical field [0001] The invention relates to the technical field of water conservancy construction, in particular to a filling material used for expansion joints of concrete panels of rockfill dams and a construction method thereof. The caulking material for joints has higher requirements for concrete panels. Background technique [0002] The concrete face plate is a key part of the anti-seepage system of the rock-fill dam, and it is also the most important structure of the rock-fill dam. Its quality directly affects the operating life and safety of the reservoir. Resilience, elasticity and deformability. [0003] Usually, the filling materials for concrete expansion joints include asphalt fir boards, asphalt felts, foam boards, etc. These materials are spliced, nailed and anchored to create a deformation space between the concrete, but it is inevitable that they will be left during the splicing process. Gap, the grout reaches the old concrete through these gaps, so tha...

AI Technical Summary

Problems solved by technology

[0003] Usually, the filling materials for concrete expansion joints include asphalt fir boards, asphalt felts, foam boards, etc. These materials are spliced, nailed and anchored to create a deformation space between the concrete, but it is inevitable that they will be left during the splicing process. Gap, the grout reaches the old concrete through these gaps, so that a "hard contact" is formed between the old and new concrete, which affects the expansion and contraction of the structure