High strength silica powder concrete and construction technology

Abstract

The invention discloses high strength silica powder concrete and a construction technology thereof. The optimal selection of raw materials and the optimal design of mixing proportion are used as footholds, the measure of mixing pulverized fuel ash and silica powder with selected moderate-heat or low heat cement replaces other measures of mixing composite high efficiency water reducing agent, fibers, and the like with parts of cement, so as to reduce the use level of the cement as much as possible and to reduce the adiabatic temperature rise of the cement, thereby greatly overcoming the disadvantages of the silica powder, improving the early-age cracking-resistance property of the cement, and giving full play to the gap filling efficacy and the pozzolanic reaction property of the silica powder. While strengthening the intensity of the concrete, the invention effectively avoids the technical problem of early-age cracking during the silica powder construction.

Description

technical field [0001] The invention relates to concrete and a construction method, in particular to high-strength silicon powder concrete and a construction method, and belongs to the technical field of construction engineering. Background technique [0002] At present, sand washing structures, flood discharge structures, and water diversion structures in water conservancy and hydropower projects are often used frequently during the operation period due to the effect of moving or suspended matter. Maintenance is frequent and maintenance costs are high. In order to prolong the service life of buildings and reduce maintenance costs, it is often used to add silica fume to concrete to obtain high-strength, abrasion-resistant, cavitation-resistant, and abrasion-resistant concrete. However, due to its small water-binder ratio, large amount of cement and not easy to bleed, it is more prone to plastic shrinkage than ordinary concrete, and its early dry shrinkage and its own volume...

AI Technical Summary

Problems solved by technology

However, due to its small water-binder ratio, large amount of cement and not easy to bleed, it is more prone to plastic shrinkage than ordinary concrete, and its early dry shrinkage and its own volume deformation are also greater than ordinary concrete. These factors are intertwined and lead to silica The technical problem of early cracking often occurs in the construction of powder concrete

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