High-performance grouting material for connecting steel bar sleeve of fabricated bridge as well as use method and application of high-performance grouting material

Abstract

The invention provides a high-performance grouting material for connecting a fabricated bridge steel bar sleeve as well as a use method and application of the high-performance grouting material. The high-performance grouting material for connecting the fabricated bridge steel bar sleeve is prepared from the following components in percentage by mass: 30 to 50 percent of cement, 6 to 20 percent of admixture, 40 to 55 percent of sand, 0.05 to 0.5 percent of defoaming agent, 0.2 to 1.0 percent of water reducing agent, 0.005 to 0.05 percent of expanding agent, 0.1 to 1.0 percent of early strength agent and 0.2 to 2.0 percent of anti-freezing agent. The high-performance grouting material can be used after being mixed with water, and can be used for connecting fabricated bridges.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a high-performance grouting material for assembly-type bridge reinforcement sleeve connection and its use method and application. Background technique [0002] The grouting material for steel sleeve connection is a key building material used in housing industrialization, and has the characteristics of large fluidity and high strength. Prefabricated bridges are emerging components in the field of construction engineering in recent years. Unlike prefabricated wall panels and other building structures, bridge components themselves have higher strength, and the size of the steel bars used in prefabricated bridges is larger, so the grip of the steel sleeve connection is required. Higher wrap strength. Existing studies have shown that the grip strength of the steel sleeve connection specimens is positively correlated with the compressive strength of the grout that connect...

AI Technical Summary

Problems solved by technology

[0003] CN113185242A discloses a kind of super high-strength grouting material, which adopts special cement such as sulphoaluminate cement, high alumina cement or magnesium phosphate cement, compound high activity mineral admixture, expansion agent, admixture and slag micropowder, etc., which improves the grouting effect. However, there is no research on the low-temperature construction performance of grouting materials.

[0005] Based on the above research, it can be seen that there are many developments for sleeve grouting materials for prefabricated buildings, most of which use sulphoaluminate cement, which can improve the early strength of the grouting material and meet the construction at an ambient temperature of 2°C, but sulphoaluminate cement The shrinkage rate of salt is large, and the strength increase in the later stage is small, which is not conducive to improving the compactness of the hardened grouting material

Images