Liquid concrete activating agent

Abstract

The invention discloses a liquid concrete activator which is made from the following raw materials according to mass percentage: superplasticizer 10-60%, aluminum sulfate 5-20%, triethanolamine 0.05-0.2%, slump-retaining agent 0-6%, gas content regulator 0-0.4%, hydroxyl compounds 0-0.02%, and water 30-77%. With the use of the inventive liquid concrete activator, the addition amount of ground slag in concrete is increased from 20-40% to 50-70% and the solidification and curing of concrete with a large amount of ground slag are accelerated, so that the concrete is similar in curing time and early strength to the common concrete, thereby facilitating the construction application. The invention can reduce the requirement for cement in concrete material, and also greatly improve the durability of concrete (e.g. resistance to sulphate corrosion and chloride ion corrosion) since the additional amount of ground slag in the concrete system is increased.

Description

technical field [0001] The invention belongs to the technical field of building materials and relates to the preparation of a liquid concrete activator. Background technique [0002] When concrete is faced with problems such as chloride ion corrosion and sulfate corrosion, it is often necessary to add a large amount of finely ground slag to the cementitious material system to prepare high-performance concrete. A number of indoor studies and field construction experience show that in concrete After adding more than 50% of finely ground slag, the setting time of concrete is greatly prolonged, and there is a problem of low early strength. [0003] Adding a large amount of ground slag to concrete can improve the durability of concrete and reduce the amount of cement in concrete, promote the development of circular economy, reduce environmental pollution and the consumption of resources by the cement industry. However, due to the above-mentioned problems, large-volume ground sla...

AI Technical Summary

Problems solved by technology

However, due to the above-mentioned problems, large-volume ground slag concrete is difficult to be popularized and applied in urban commercial concrete mixing plants and cast-in-place projects, and due to the long setting time and low early strength, the turnover of formwork during construction is increased. Demand

[0004] This invention aims at the problems of long setting time and low early strength of the large-volume ground slag concrete itself, and develops a compound with comprehensive properties such as water reduction, faster setting time, and early strength improvement added during concrete construction. High-efficiency liquid activator, its use method is simple and its effect is good

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