High speed railway bridge bearing anchoring mortar material

Abstract

The invention discloses a high speed railway bridge bearing anchoring mortar material with is blended from components of, by weight: 37 to 45% of sulphoaluminate cement, 0 to 8% of Portland cement, 0 to 5% of an addition, 45 to 55% of graded river sand, 0.04 to 0.18% of a solidification retarder, 0.05 to 0.12% of an accelerant, 0.15 to 0.4% of a water reducing component, 0.05 to 0.15% of a defrothing component, and 0 to 0.1% of fiber. The material provided by the invention is specially used in anchoring and grouting of high speed railway bridge pot rubber bearings. The material has characteristics of good fluidity, high early strength, good filling properties, no strength reversing in later stage, low cost, convenient application, and the like. The material also can be applied in large equipment installation and pavement rush-repairing.

Description

technical field [0001] The invention relates to the field of building materials. Specifically, it relates to a super-early-strength micro-expansion anchoring mortar used for the installation of basin-type rubber bearings of high-speed railway bridges. Background technique [0002] In recent years, China's high-speed railway has developed rapidly, especially the mileage of passenger dedicated lines with a speed of more than 350km / h has continued to increase. The construction of passenger dedicated lines has put forward higher requirements for the quality and service life of construction projects. Among them, in order to improve the quality and increase the service life, it is required to use an early-strength inorganic mortar material with better durability in the anchorage construction of the support. [0003] Chinese patent 101486545A discloses an expansion-controllable super-early-strength bearing mortar material and a preparation method thereof. The mortar has the advan...

AI Technical Summary

Problems solved by technology

In the literature searched, there are few relevant research reports on mortars that can simultaneously take into account high fluidity, ultra-early strength, micro-expansion, late-stage strength stability and durability

Moreover, most of the existing related products on the market have shortcomings such as low fluidity, poor perfusion filling performance, insufficient hourly strength after hardening, insufficient one-day flexural strength, and late strength shrinkage.

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