Abstract
As one of surface finishing methods of concrete pavement, exposed aggregate method with small coarse aggregate has been studied to improve surface texture and noise problem. Compared with traditional maximum size of coarse aggregate (40mm), concrete mixture with maximum size of 13mm needs more amount of cement to keep durability. Therefore, it is desirable that the concrete slab consists of two layers of different concrete mixture (upper layer (1/3): 13mm, lower layer (2/3): 40mm) for economical reason. To study effect of drying shrinkage strain caused by two layers of different concrete mixture, many type of dummy slabs were made and the strain was recorded. As a result of analysis, the drying shrinkage strain between two layers is not so large and dose not give any major damage like cracking on concrete slab.
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