High-early premixed concrete of sulfoaluminate salts

Abstract

The invention relates to sulphate aluminium cement early strength premixed concrete, which is formed by 10 to 14 percent (weight) of sulphate aluminium cement with the strength grade equal to 42.5, 70 to 75 percent (weight) of sandstone, 0.2 to 0.25 percent (weight) of high-efficiency water reducing agent, 5 to 8 percent (weight) of water and the balance being admixture which are stirred and mixed. Under the condition of a certain ambient temperature, the coagulation and the hardening of the sulphate aluminium cement early strength premixed concrete ensure enough operation time during transportation and construction; meanwhile, higher early strength can be obtained after the coagulation and the hardening of the concrete, and can meet the requirements of quick repair engineering; moreover, the concrete has remarkable economic benefit and social benefit.

Description

technical field The invention belongs to the field of concrete, in particular to a sulphoaluminate cement ready-mixed concrete. Background technique Some construction projects that need to be repaired quickly put forward the requirement of fast setting and early strength for the setting time and strength of concrete. For ordinary concrete, in order to obtain high early strength, the conventional method is to reduce the water-cement ratio, and at the same time, add admixtures for fast setting and strengthening to the concrete at the construction site. Concrete with low water-cement ratio also brings small slump and low fluidity of freshly mixed concrete. This feature has a great influence on unloading and vibration of on-site construction. Adding fast-setting and strengthening admixtures on site makes it difficult to control the setting time of concrete. Not only is the measurement accuracy of the admixtures inaccurate, but it is also difficult to ensure the homogeneity of t...

AI Technical Summary

Problems solved by technology

The technical problem to be solved by the present invention is to provide a kind of sulphoaluminate cement early-strength read

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