Study and Application on High Performance Expansion Agents (GNA)

摘要

Study and use of high performance expansion agents or cement with adjustable properties are the main way to overcome the concrete cracking. According to the developing direction of expansion agents in China and the achievement in scientific research in the past, the most important thing of this issue is to research a kind of high performance expansion agents. It utilizes the interaction of three expansion resources, CaO, ettringite, MgO to gain suitable expansion value and expansion development. This can compensate the shrinkage of concrete structure, improve the cracking resistance, overcome the defect of shrinkage and improve the durability and safety of construction.