CO_2养护混凝土技术研究进展

Progresses in CO_2 Curing of Concrete

CO_2养护混凝土技术是将CO_2与新拌混凝土在成型后接触,使CO_2与水泥熟料矿物间发生化学反应,进而使得新拌水泥混凝土在很短的时间内凝结硬化的养护技术。它不仅可以获得性能更好的混凝土,还可以合理利用CO_2并且节能减排,是一项有前景的可持续发展技术。综述了CO_2养护混凝土的反应机理、影响养护过程的关键因素、CO_2养护混凝土对微观结构以及耐久性的影响、后续水养护等方面的研究进展,并对CO_2养护混凝土技术的未来发展进行了展望。

The CO2-curing concrete technology is a promising sustainable curing method, which based on the chemical reactions between CO2 and fresh concrete. By CO2-curing concrete technology, the fresh concrete could obtain higher early strength and denser microstructure. In another, the CO2-curing concrete technology is an environmentally friendly and energy-efficient method to consume CO2. This paper reviews and summarizes the development and latest research results of CO2 curing of concrete. The kinetics and mechanism of CO2-curing concrete technology, the effect of CO2-euring concrete on microstructure and the subsequent hydration of CO2-curing concrete are introduced. Finally, according to the review of previous studies, some recommendations will be given about the further research in this field.