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Structural Concrete, Vol. 6, no. 4, December 2005

On statistical characteristics of the compressive strength of recycled aggregate concrete

Jianzhuang Xiao, Tongi University, P.R. China
Jiabin Li, Tongi University, P.R. China
Chuanzeng Zhang, University of Siegen, Germany

This paper presents a statistical analysis of the compressive strength of recycled aggregate concrete (RAC) with recycled coarse aggregate (RCA) coming from one single source. The statistical analysis includes the mean value, the standard deviation and the coefficient of variation in addition to the probabilistic distribution. In order to obtain the compressive strength variations, 371 cube specimens with different RCA replacement percentages of 0, 30%, 50% and 100%, respectively, were tested under identical laboratory conditions. With the statistical data, both the normal and the lognormal model were fitted to describe the probabilistic distribution of the compressive strength. It was found that the statistical characteristics of the compressive strength of recycled aggregate concrete do not differ very much from those of normal concrete (NC) with similar strength, irrespective of the recycled coarse aggregate replacement percentage.

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