الفهرس 
Advantages of Concrete RecyclingOnly 14 pages are availabe for public view
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Abstract
The effect of recycled materials as a recycled aggregate (crushed shale brick, crushed ceramic and crushed concrete) on the fresh and hardened properties of two types of concrete (Recycled Self-Compacting Concrete (RSCC) and recycled concrete (RNC) was investigated. Recycled materials (crushed ceramic, crushed shale brick and crushed concrete) were used to replace coarse aggregate at different ratios of 25%, 50%, 75% and 100% to produce recycled mixes. Thirty eight concrete mixes were cast and test to fulfill the aim of this thesis. This research was conducted to study the mechanical properties of recycled mixes. The experimental includes 546 cubes (10×10×10cm), 1404 cylinders (10×20cm), and 78 prisms (10×10×50cm) to investigate the mechanical properties and the effect of high temperature on the compressive strength of Recycled concrete. The specimens were heated up to 200, 400, and 600ºC for two hours followed by to cooling gradually in the laboratory air. The fresh properties of RSCC were evaluated using slump flow, Jring and V-funnel tests. Compressive strength, splitting tensile, flexural strength, bond strength and modules of elasticity were performed in order to investigate mechanical properties of two types of concrete. Also the durability of the recycled concrete was evaluated under effect of high temperature (200, 400 and 600 ºC). Test results showed that, the average compressive strength reduced by 33.9% and 27% for recycled self-compacted concrete with crushed shale brick and crushed ceramic, respectively. While the average compressive strength reduced by 35.1% and 29% for recycled normalconcrete with crushed shale brick and crushed ceramic, respectively. Moreover, using crushed concrete as a coarse aggregate replacement, the mechanical properties for recycled self-compacted and recycled concrete mixes was nearly equal to the control mixes for all percentage of replacement. A correlation between compressive strength and bond strength or modules of elasticity were obtained from the experimental results for the recycled concrete.