大掺量Ⅲ级粉煤灰混凝土耐久性研究

Durability of Concrete Incorporating Large Volume of Class Ⅲ Fly Ash

研究了大掺量Ⅲ级粉煤灰混凝土的碳化、抗钢筋锈蚀和抗侵蚀性能以及试验采用的CO2浓度对评价大掺量低质粉煤灰混凝土抗碳化性能的影响.结果表明,掺激发剂的大掺量Ⅲ级粉煤灰混凝土具有良好的抗碳化和抗钢筋锈蚀性能,大掺量Ⅲ级粉煤灰混凝土的抗侵蚀性能优于普通对比混凝土,碳化试验采用的CO2浓度对评价大掺量Ⅲ级粉煤灰混凝土抗碳化性能具有较大影响.

Carbonation, corrosion of steel reinforcement in concrete and corrosion resistance of concrete incorporating large volume of class Ⅲ fly ash were studied. The effect of concentration of carbon dioxide used in the experiment on estimating the carbonation resistance of concrete incorporating large volume of class Ⅲ fly ash were also investigated. Test results show that the concrete incorporating large volume of class Ⅲ fly ash with activator has good carbonation resistance and corrosion resistance of steel reinforcement. The corrosion resistance of concrete incorporating large volume of class Ⅲ fly ash is better than that of control concrete. The concentration of carbon dioxide used in the experiment has considerable effect on estimating the carbonation resistance of concrete incorporating large volume of class Ⅲ fly ash.