Low-temperature early strong bridge support anchoring material and preparation method thereof

Abstract

The invention relates to a low-temperature early strong bridge support anchoring material which is prepared from the following components in percentage by weight: 38-45 percent of aluminum sulfate cement, 2-6 percent of expanding agent, 1-5 percent of superfine silica fume, 40-50 percent of quartz sand, 0.5-0.8 percent of water reducing agent, 0.5-1 percent of reinforcing agent, 0.1-0.4 percent of thickening time control agent, 0.02-0.06 percent of defoaming agent, 2-5 percent of anti-freezing agent and 0.04-0.08 percent of fluid volume stabilizing agent. All the components are uniformly mixed, mixed with water and stirred, wherein the ratio of material to water is 0.13-0.16; and after being uniformly stirred, the mixture is used for support grouting anchoring. The low-temperature early strong bridge support anchoring material is suitable for rapid construction of bridge support anchoring under the low-temperature condition, and has the characteristics of high fluidity, super easy strong high strength, no shrinkage, good anti-freezing effect and the like.

Description

technical field [0001] The invention relates to a low-temperature early-strength bridge support anchoring material, in particular to an expansion early-strength type for installing high-speed railway and expressway bridge supports under the condition that the temperature is lower than 5°C and higher than minus 15°C. A support grouting material belongs to the technical field of cement-based grouting materials. Background technique [0002] In recent years, the infrastructure is in a period of high-speed construction, especially the high-speed railway passenger dedicated line, expressway and urban light rail are developing rapidly. Therefore, while ensuring the quality of the project, higher requirements are put forward for the construction speed and the improvement of the service life of the infrastructure project. Require. In order to complete the project construction on time or in advance, higher requirements are put forward for the materials used in the infrastructure. Th...

AI Technical Summary

Problems solved by technology

Chinese patent CN 102173676A discloses a non-shrinkage cement grouting material, which is characterized by early strength, high strength, micro-expansion, and shortened construction period. To reach more than 20MPa

[0004] When the temperature is between 5°C and minus 15°C, the strength of traditional grouting and anchoring materials grows slowly, and shrinkage occurs, resulting in a decrease in strength in the later stage. Dense, affecting load transfer and engineering quality

In the process of laying prefabricated box girders for high-speed railways, it is required that the supports can bear the load of continuous girders after 2 hours of grouting. Under these conditions, no special measures have been taken to achieve bridge grouting and anchoring materials with a strength of 20MPa within 2 hours.