Preparation and construction method of epoxy grouting material for track filling and secondary grouting

Abstract

The invention relates to preparation and a construction method of a grouting material (referred to as RE-GD) for track filling and secondary grouting. The RE-GD comprises three components, A, B and C. The component A is a modified epoxy resin mixing system, which comprises modified epoxy resin, an active diluent, a toughening agent, an antioxidant, a leveling agent, a defoaming agent and a coupling agent. The component B is a curing agent. The component C is a filler. The high-strength precise non-contraction epoxy resin grouting material for tracking provided by the invention has the advantages of high adhesion to a cement base and a steel base, high strength, good toughness, no expansion, extremely low contraction rate and small amount of dense porosity; excellent properties of polymer material enables the material with characteristics, unmatched by other materials, in corrosion resistance and weatherability performance, and can satisfy usage in different climate environment. The material provided by the invention has long cycle of usage and a general service life of up to 30 years, and can be used as a substitute or be applied to environment and position, which CA mortar or cement base grouting material can not be applied to.

Description

technical field [0001] The invention relates to a preparation and construction method of epoxy grouting material for track filling and secondary grouting. Background technique [0002] Railway container transportation is an important symbol of railway freight modernization. In recent years, the container transportation industry at railway ports has developed rapidly, and the transportation volume has increased significantly. However, problems such as backward facilities for reloading containers on railways and insufficient capacity have become increasingly prominent. The existing track system has seriously affected production and brought safety hazards to crane operations. [0003] In order to make the slab track have a certain degree of elasticity, reduce the construction error of the base, and fix the position of the track structure, it is usually necessary to fill the non-shrinkage buffer with excellent toughness and adhesion between the concrete base (or steel structure...

AI Technical Summary

Problems solved by technology

The research and development of CAM (emulsified asphalt mortar) in Japan and Germany has been mature, and the research on CAM for slab ballastless track in my country started relatively late. CAM, but compared with Japan's CAM technology, there is still a big gap

In particular, there is a considerable gap in the air content, fluidity and durability (freeze resistance) of CAM

The CAM mortar material has low strength, poor durability, short service life, and cracking phenomenon in long-term use, which brings safety hazards to high-speed railway transportation.

In addition, during pouring of CA mortar construction, in order to make the cement hydration form the required silicate compound to have the final strength, it is necessary to add excess water. On the one hand, the existence of excess water will cause volume shrinkage after the cement product dries; In the cold season, the residue will freeze and expand, causing the mortar cushion to crack, and its unstable expansion and contraction rate will have an adverse effect on the precise positioning of the track

Third, the time required for cement hardening is too long, and the strength rises slowly, which affects the construction progress and low work efficiency

[0006] Another conventional cement-based grouting material has problems such as poor toughness, poor weather resistance, and large expansion rate, making the cement product itself a material with many defects.

Also not suitable for track pad filling for long term use

Images