During the past decades, in most industrial countries, a large number of old buildings have been demolished and millions tons of construction debris have been produced. Demolition wastes around the cities have become a serious environmental issue and a threat to underground water quality and results in unpleasant views. Today, less than 5% of clay bricks taken from demolition sites are being separated and recycled, while this proportion for concrete waste being recycled is above 90%. This low rate of brick recycling is due to a lack of understanding about the performance of crushed brick material as aggregate in concrete or road base. In case of concrete, the high water absorption of crushed brick and their relative low compression strength in comparison with natural aggregate makes it difficult to meet traditional concrete specifications. The present research is an effort to investigate the properties of crushed clay bricks taken from demolition sites and experimentally evaluate the strength and durability characteristics of the concrete prepared using the crushed clay bricks. The experiments data reveal that, in spite of high porosity and absorption of recycled crushed brick, using this material as aggregate, results in a semi light weight, durable and low permeable concrete.

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