Concrete and preparation method thereof

Abstract

The invention relates to the field of building materials, and particularly discloses concrete and a preparation method thereof. The concrete is prepared from the following raw materials: cement, water, fly ash, slag powder, fine aggregate, coarse aggregate, a high-performance polycarboxylate superplasticizer and a pH response type capsule. The pH response type capsule comprises a coating and a core material, the coating is a poly (L-lysine-amino-terephthalic acid) microcapsule film, and the core material comprises barium hydroxide and an amino alcohol corrosion inhibitor; the preparation method comprises the following steps: mixing and uniformly stirring the cement, the slag powder, the fly ash, the coarse aggregate and the fine aggregate to obtain a solid mixture; adding the rest raw materials except the pH response type capsule and water into the solid mixture, stirring to obtain a concrete matrix, adding the pH response type capsule into the concrete matrix, and stirring to obtain the concrete. The concrete has the advantages that the anti-corrosion effect of the concrete is improved, and then the durability of the concrete is improved.

Description

technical field [0001] This application relates to the field of building materials, more specifically, it relates to a concrete and its preparation method. Background technique [0002] Coastal ports, salt pans, and saline soil areas usually contain a large amount of sulfate and chloride salts, which have a serious corrosion effect on concrete and steel bars. When steel bars are corroded by chloride ions or sulfate ions, steel bars will quickly corrode and age. The steel bars will break irregularly, and the concrete will also crack at the same time, affecting the strength of itself and the quality of the entire building. Therefore, the durability of reinforced concrete structures in the above-mentioned erosion areas has become a worldwide concern. [0003] Existing traditional methods use sulfate-resistant cement, or mix a certain amount of mineral admixtures in concrete. Sulfate-resistant cement, however, is in limited supply and expensive. The method of adding mineral a...

AI Technical Summary

Problems solved by technology

Sulfate-resistant cement, however, is in limited supply and expensive

The method of adding mineral admixtures can improve cement hydration density and reduce salt corrosion stress, but when the corrosion environment is moderately corrosive or strongly corrosive, this method alone cannot achieve good corrosion resistance. corrosion effect