Flexural Crack Width of Reinforced Concrete Beams with Roof Tile Waste Aggregate

摘要

Flexural crack widths of Portland blast furnace slag cement-type B RC beams internally cured with porous ceramic-roof material waste aggregate (PCA) were experimentally investigated. The water-cementitious materials ratios (W/CM) were 0.50, 0.35 and the replacement ratios of porous ceramic coarse aggregate (PCCA) were 0, 10%, 20% and 0, 20%, 30% respectively, of the total coarse aggregate volume. In addition, the effects of fine aggregate replacement of 12% with porous ceramic fine aggregate (PCFA) were investigated in the case of W/C=0.50. The results showed that PCA contributed to improved compressive, splitting tensile strengths and fracture energies independent of the replacement ratio of PCA and W/CM. In addition, the flexural crack widths in the case of W/ C=0.50 were almost the same as those of the reference beam, while in the case of W/ C=0.35, the internal curing effect of PCA contributed to decrease in the flexural crack width, independent of the replacement ratio.