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轴压荷载下粉煤灰混凝土碳化性能实验研究 被引量:8

The carbonation properties of the fly ash concrete under the axial compression load
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摘要 本研究以不同的轴压荷载为基准,分别对不同掺量的粉煤灰混凝土进行了短期以及长期加载下的碳化试验,分析短期加载及长期持载2种情况下,不同轴压荷载对粉煤灰混凝土碳化性能的影响。研究结果表明:短期加载与长期持载2种情况下,随着荷载的增加,4种粉煤灰掺量混凝土的碳化深度都呈现先减小后增大的趋势。同时,在20%、40%极限荷载时,长期持载较短期加载更有利于混凝土的抗碳化性能,而在60%极限荷载下,长期持载对粉煤灰混凝土的抗碳化性能更为不利。 In this paper,the carbonization test with different dosages of fly ash concrete was carried out based on the different axial compression loads,and the effect of different axial compressive loads on the carbonation depth of fly ash concrete was analyzed in two cases of short-term load and long-term load.The results of the analysis showed that with the increase of the load,the carbonization depth of concrete with four different fly ash contents presented a trend of first decreases and then increases in the cases of short-term loading and long-term loading.Meanwhile,when the load is 20%,40%of the ultimate load,the long-term loading is more conducive than short-term loading to the concrete carbonation resistance,while at the60% ultimate load,the long-term loading is more unfavorable than short-term loading to the concrete carbonation resistance.
出处 《河北农业大学学报》 CAS CSCD 北大核心 2017年第6期104-108,124,共6页 Journal of Hebei Agricultural University
基金 河北省自然科学基金(E2015204111) 河北省教育厅重点项目(ZD2016037) 河北农业大学理工基金(ZD201504)
关键词 粉煤灰混凝土 短期加载 长期持载 轴压荷载 碳化深度 fly ash concrete short-term load long-term load axial compression load carbona-tion depth
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