Combined-die self-compacting concrete preparation process

Abstract

The invention provides a combined-die self-compacting concrete preparation process. According to the process, cement, slag powder, silicon powder, sand, cobblestone, water, an additive and other raw materials are successively added according to a certain ratio and are successively stirred. The cement is ordinary Portland cement and the usage amount of the cement is 350 to 450 kg / m<3>; the slag powder is levigated slag powder with a specific surface area of no less than 4000 cm<2> / g, and the usage amount of the slag powder is 175 to 225 kg / m<3>; the silicon powder is a high-activity pozzolanic admixture with a specific surface area of no less than 180000 cm<2> / g and density of about 2200 kg / m<3>, the content of high-activity silica is no less than 85%, and the usage amount of the silicon powder is 24 to 30 kg / m<3>; the additive is a UNF-5AS-C60 special set retarding superplasticizer, and the usage amount of the additive is 14 to 18 kg / m<3>; the sand is zone-II medium sand with a fineness modulus of 2.8, and the usage amount of the sand is 640 to 690 kg / m<3>; the cobblestone is obtained after continuous grading of cobblestone with a particle size in a range of 5 to 15 mm, and the usage amount of the cobblestone is 920 to 980 kg / m<3>; and the water is drinking water, and the usage amount of the water is 150 to 180 kg / m<3>. Self-compacting concrete prepared by using the process has high strength, impermeability and resistance to corrosion and wear and is free of the problems of low early-stage strength and great early-stage shrinkage.

Description

technical field [0001] The invention relates to a technology for preparing self-compacting concrete, in particular to a technology for preparing self-compacting concrete for a combined mold of a prefabricated house. Background technique [0002] In the prefabricated wall panel production line of prefabricated housing, the use of combined molds to produce prefabricated wall panels can produce multiple wall panels at one time, which greatly improves production efficiency. In the process of preparing multiple wallboards, if the combined mold is vibrated as a whole, first, it needs to consume a large amount of electric energy, and second, the vibration process will inevitably damage the mold and the finished prefabricated wallboard, so it is urgently needed A vibration-free process. The emergence of self-compacting concrete solves this problem. Because self-compacting concrete is vibration-free, it can save labor and electricity, improve construction efficiency, and improve the...

AI Technical Summary

Problems solved by technology

In the process of preparing multiple wallboards, if the combined mold is vibrated as a whole, first, it needs to consume a large amount of electric energy, and second, the vibration process will inevitably damage the mold and the finished prefabricated wallboard, so it is urgently needed A vibration-free process