摘要
通过对C30和C50混凝土试件进行冻融、碳化、冻融-碳化交替作用试验研究,结果表明,混凝土水胶比越小、强度越高,抗冻融与抗碳化性能越好；在混凝土中掺入适量（10％～20％）粉煤灰可以提高混凝土的抗冻融性能,大掺量粉煤灰（≥30％）对混凝土的抗冻融性能与抗碳化性能都不利；混凝土经冻融与碳化交替作用后,其抗冻融性能有所改善,但对混凝土抗碳化性能极为不利.
Based on the study about freezing and thawing cycles, carbonation and their alternation process of the C30 and C50 concrete, the results show that the smaller water-cement ratio and higher strength lead the better anti-freezing and thawing performance, also with the carbonation resistance. That the fly ash mixed into concrete with an appropriate amount（10%～20%） could improve the performance of freeze-thaw cycles of the concrete, high-blending fly ash （≥30%） was negative to both of the anti-freezing and thawing performance and the carbonation resistance of the con- crete. Anti-freezing and thawing performance was improved after the alternation of freezing-thawing and carbonation, yet to the carbonation resistance performance of the concrete.
出处
《建材世界》
2013年第4期19-22,共4页
The World of Building Materials
关键词
寒冷地区
冻融循环
碳化
耐久性
cold regions
freezing and thawing cycle
carbonation
durability
