Fast rush-repair mortar for ballastless track filling layer and preparation method and application thereof

A ballastless track and filling layer technology, applied in the field of building material mortar, can solve the problems of damage and high material prices, and achieve the effects of improving toughness, improving quality and durability, and improving impact resistance
CN103265249AActive Publication Date: 2013-08-28METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI
Publication Date
2013-08-28

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Abstract

The invention discloses fast rush-repair mortar for a ballastless track filling layer and a preparation method and an application thereof. The fast rush-repair mortar comprises the following components in parts by mass: 0.95-0.99 part of cement, 0.01-0.05 part of cement expansion admixture, 0.001-0.0025 part of fiber, 0.35-1.4 parts of macromolecular emulsion, 1.5-2 parts of sand, 0.001-0.005 part of thickening time control agent, 0.0004-0.01 part of antifoaming agent, 0.0001-0.003 part of gas forming agent, 0-0.01 part of air entraining agent, 0-0.02 part of water reducing agent, 0-0.001 part of rheology modifier and 0-0.3 part of water, wherein the cement and the cement expansion admixture account for 1 part in total. The rush-repair mortar disclosed by the invention has the advantages of fast setting and early strength and excellent thermal adaptability and application property, and guarantees recovery of railway operation in a skylight period of 4 hours in a severe cold area.
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Description

technical field

[0001] The invention belongs to the field of building material mortar, and in particular relates to a rapid repair mortar for a slab ballastless track filling layer and its preparation method and application, especially the application in repairing the slab ballastless track filling layer in severe cold regions. Background technique

[0002] Slab ballastless track is one of the main structural forms of high-speed railway ballastless track. Its structural feature is to lay a concrete base on the subgrade, place a prefabricated track slab on the base, reserve a gap of 3 to 5 cm between the two, and pour Cement-emulsified asphalt mortar forms a uniform filling layer with both rigidity and elasticity after curing. In the slab ballastless track structure, compared with the high-strength concrete track slab and concrete base, the filling layer formed by the curing of cement emulsified asphalt mortar becomes the weak link in the structure. In recent years, slab bal...

Claims

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