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《Sichuan Building Science》 2018-05
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Random calculation model of carbonation depth for long-age high performance concrete

CHEN Meng;LI Xuejia;LIU Leqing;School of Civil Engineering,Zhengzhou University;  
The carbonation depth tests of 12 high performance concrete specimens were conducted. The design strength grade of specimens included C20,C30,C40,C50,C60,C70 and C80,and the design age included 14 d,28 d,60 d,90 d,740 d and 14 a respectively. The influence of concrete strength and concrete age on the carbonation depth was analyzed. Through the histogram and the Pearson fitting goodness test,it is shown that the carbonation depth of structural specimens obeys normal distribution at 0. 05 significant level. Considering the influence of the concrete cubic compressive strength standard value and the environmental factor,the calculation models of the average carbonation depth and the carbonation depth standard deviation are all given,and the random calculation model for predicting the carbonation depth of high performance concrete is established.
【Fund】: 国家自然科学基金(50578148)
【CateGory Index】: TU528
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