Study on drying shrinkage characteristics of porous concrete and its geometrical model

In this study, a series of experiments on drying shrinkage of porous concrete was carried out to examine the influence of various factors, i.e. void ratio, rock type and size of aggregates, compaction strength level, etc. It was found that the influence of designed void ratio and rock type of the aggregate on the final amount of drying shrinkage of the porous concrete was significant, while the effect of compaction strength level was insignificant. Based on the experimental results, a geometrical model of the porous concrete was proposed to represent the drying shrinkage characteristics. It seems possible to predict the influence of the various factors on the drying shrinkage characteristics by using the proposed model