Investigation on the performance control technologies of hydraulic concrete in harsh conditions

Abstract

In view of the series of major technical problems faced by hydraulic concrete in harsh construction and service conditions such as high temperature environment, high clay content aggregate, long distance transportation, high alkali activated aggregate application, high corrosive environment with multiple ions, high water head and large discharge, the technologies for construction performance control, the evaluation and inhibition of alkali aggregate reaction, the evaluation of corrosive resistance, and the effect evaluation and performance optimization of abrasion and cavitation are systematically explored and summarized herein. Furthermore, the long time slump-retaining mechanism of polycarboxylate superplasticizer with slump-retaining and clay-tolerance properties in concrete, the rapid risk assessment method of alkali aggregate reaction, the mechanism of self-immunity to alkali-aggregate reaction, the theoretical models of chloride ion diffusion and sulfate attack, as well as the equipment, method and optimization of abrasion and cavitation are expatiated. These study achievements enrich the theory and technology of hydraulic concrete performance control, and can provide important guarantee for scientific decision-making of major engineering.