الفهرس Only 14 pages are availabe for public view
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Abstract
The aims of the current research are to determine the influence of using recycled aggregate on the properties of both normal and high-strength concrete and to investigate the effect of adding synthetic fibers to recycled aggregate concrete mixes in order to provide a solution for current application requirements and better performance. This investigation was carried out on forty mixes divided into two phases: phase-I of cement content 400 kg/m3 for normal strength concrete and phase-II of cement content 600 kg/m3 for high strength concrete. Four recycled aggregate replacement percentages (0%,25%,50%,100%) with different types and volume fractions of synthetic fibers (0.05%, 0.1%,0.2% of fibermesh300 and 0.1% polypropylene fiber) were used in the both phases. The experimental program included assessment of fresh and hardened concrete properties using tests of workability, air content, compressive strength, indirect tensile (splitting tensile) strength, flexural strength, static modulus of elasticity, impact resistance, abrasion resistance and drying shrinkage