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Abstract: In an effort to lessen the Urban Heat Island effect, aggregate in road wearing course was replaced in varying amounts with sintered clay or recycled ceramic. The physical and thermal properties of these new mixtures were then examined to determine if they showed improvements over traditional wearing course. It was found that the replacement of aggregate with sintered clay decreased the thermal conductivity and thermal diffusivity. A similar result was also found when aggregate was replaced with recycled ceramic. It was found that wearing courses prepared using sintered clay or recycled ceramic showed increasing sensitivity to moisture as the dosage of each material increased, and their performances at high temperature decreased with increasing dosage. It was determined that replacing aggregate with recycled ceramic could be a viable method of limiting the Urban Heat Island effect since recycled ceramic is readily available as construction waste. The optimal dosage of recycled ceramic was determined to be between 40-60%.

Reference: International Journal of Civil and Environmental Engineering, 10, 6 (2010) 1-6