New Method of Mix Design for Self-Compacting Concrete Based on Material Characteristics

According to the definition of specific surface, a convenient method was presented to estimate the specific surface of aggregate. Two new concepts, surplus thick-ness of sand and thickness of paste around aggregate, were introduced in the processes of sand filling gravel void and paste filling aggregate void respectively. Based on these concepts and the distraction model of aggregate skeleton, the mass content formula of each self-compacting concrete (SCC) component was deduced. The C50 SCC were confected by this method and tested then. The results indicated that the workability, filling property and segregation -resistance ability behaved excellently in site experiment.