Micro expansion grouting material for tunnel lining filling

Abstract

The invention discloses a micro expansion grouting material for tunnel lining filling. The micro expansion grouting material is prepared from the following ingredients in parts by weight: 35 to 50 parts of ordinary cement, 5 to 8 parts of micro beads, 3 to 5 parts of silicon ash, 4 to 6 parts of expanding agents, 35 to 45 parts of quartz sand, 1 to 2 parts of water reducing agents, 0.5 to 1.5 parts of retarding agents, 0.1 to 0.3 part of water holding agents, 0.2 to 0.4 part of early strengthening agents, 0.2 to 0.3 part of plastic expanding agents, 0.1 to 0.3 part of re-dispersible latex powder and 0.1 to 0.3 part of anti-foaming agents. The micro expansion grouting material for tunnel lining filling provided by the invention has the advantages that the flowability is good; the micro expansion filling performance is excellent; the early stage intensity development is fast; the later stage intensity is high; the anti-seeping performance is high; meanwhile, the combination performance with the concrete is high; the micro expansion grouting material is widely used for the disengaging area grouting between the tunneling lining and a waterproof plate; the problem of existence of a great number of hollow holes of the tunnel arc top lining can be solved; various construction defects of the lining can be restored; the lining integral mechanical property is improved.

Description

technical field [0001] The invention relates to a micro-expansion grouting material suitable for the hollow area between the tunnel lining and the waterproof board, belongs to the technical field of building materials, and is suitable for tunnel construction of high-speed railways and highways. Background technique [0002] Concrete construction of the lining vault, due to the defects of the construction process itself, the quality of the construction personnel and construction management problems, there are a large number of voids in the lining of the tunnel vault, which brings great harm and risk to the project, especially in the era of high-speed rail, the tunnel lining disease more prominent. In order to improve the overall quality of the lining of railway tunnels and effectively prevent vault voids, implement the spirit of the "Notice on Printing and Distributing Implementation Opinions on Preventing Vault Vaults in Secondary Lining of Railway Tunnels" [[2015] No. Appl...

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