Concrete admixture capable of inhibiting alkali-silica reaction

Abstract

The invention discloses a concrete admixture capable of inhibiting an alkali-silica reaction. The concrete admixture comprises the following components in mass ratio: 20-90 of spherical superfine inorganic industrial waste with high glass content, 0-60 of crystal aluminum hydroxide and 10-70 of inorganic industrial waste silicon ash with high amorphous SiO2 content. The mixing amount of the concrete admixture is 10-30% of the total mass of cementing materials. The spherical superfine inorganic industrial waste with high glass content has the glass content of at least 95%, the granularity characteristic parameter of at most 1.0mum and the physical and chemical factor Ipc of at least 1.20*10<7> calculated according to a formula. The crystal aluminum hydroxide is of an industrial grade and has the Al2O3 content of at least 63.5% and the fineness of 180-6000mu. The inorganic industrial waste silicon ash with high amorphous SiO2 content has the SiO2 content of at least 85%. By using the concrete admixture, damage by alkali-silica reaction of concrete is effectively inhibited under the condition of lower mixing amount which is less than 30%, the viscosity of the concrete is reduced, and the hydration heat of the concrete is not increased.

Description

technical field The invention belongs to the field of cement concrete materials, and relates to alkali-aggregate reaction inhibition materials for cement concrete materials, more specifically for alkali-silicic acid reaction inhibition, especially concrete prepared with aggregates with high alkali activity, and its admixture When the dosage is limited by relevant regulations or transportation distance and source, or when the addition of silica fume has an adverse effect on other properties of concrete, it provides a concrete admixture that can inhibit the reaction of alkali-silicic acid. Background technique Concrete alkali-aggregate reaction refers to the dissolution of cement, admixtures, mineral admixtures and soluble alkali (potassium, sodium) in the mixing water in the concrete pore liquid, and the active components in the aggregate that can react with alkali in the concrete A physical and chemical reaction that gradually occurs after hardening to cause internal stress ...

AI Technical Summary

Problems solved by technology

For the above problems, the existing technology can not provide a cost-effective solution