Injectable reinforcement material used for masonry structure reinforcement and preparation method thereof

Abstract

The invention discloses an injectable reinforcement material used for masonry structure reinforcement, which is prepared from the following raw materials by mass: 20%-25% of cement, 2%-5% of silica fume, 2%-4% of fly ash, 0.10%-0.15% of a super plasticizer, 1%-2% of an expansive agent, 0.05%-0.1% of cellulose ether, 0.05%-0.1% of anti-cracking fiber, 50%-60% of glass beads and 10%-15% of graded sand. The cement is 42.5 ordinary Portland cement, the silica fume is active silica fume with effective SiO2 content greater than 90%, and the fly ash is first-grade low calcium fly ash. The formula design of the injectable reinforcement material not only considers properties of a material its own, and also gives consideration to the matching performance of a masonry structure material and the material, and the compatibility and durability of a reinforcement system are obviously better than those of a conventional modified cement mortar reinforcement system; the injectable reinforcement material has good pumping performance, and is suitable for mechanized injecting construction.

Description

technical field [0001] The invention belongs to the field of masonry structure reinforcement building materials, and in particular relates to a sprayable reinforcement material for masonry structure reinforcement and a preparation method thereof. Background technique [0002] In the Wenchuan Earthquake, masonry structures such as primary and secondary school buildings, private houses, and hospitals collapsed and damaged on a large scale, causing immeasurable losses to the lives and property safety of the people. Due to the long history of construction, poor construction quality, and unreasonable structural design, many masonry structures have poor seismic ratings and are in urgent need of reinforcement. In the reinforcement process of masonry structures, the steel mesh-cement mortar surface layer reinforcement process has the advantages of simple procedures, high degree of mechanized construction, low labor intensity, durability and reliability, etc., and has been generally ...

AI Technical Summary

Problems solved by technology

[0003] At present, the conventional cement mortar for reinforcement is only a simple modification made on the basis of ordinary cement mortar to improve the performance of the reinforcement material itself, such as ease of construction, early strength, waterproof and impermeability, etc., and no reinforcement has been considered. The physical and mechanical compatibility of materials and masonry structure materials, that is, the compatibility and durability of the reinforcement system has not attracted enough attention. Therefore, the long-term effectiveness of masonry structure reinforcement is worrying, and the possibility of repeated reinforcement in the future is high.

Images