ULTRA-HIGH PERFORMANCE REINFORCED BY POLYPROPYLENE FIBER CONCRETE MADE WITH RECYCLED COARSE AGGREGAT

Laith A. Ahmed, Shatha S. Hassan, Osama A. Al-Ameer

Abstract


Preserve natural environmental resources and losing of land used as a graveyard for demolition waste concrete buildings, recycling concrete aggregate is one of the green sustainability practices and keep the land and reduce material losses.  Investigation on mechanical properties of high performance concrete with polypropylene fiber reinforced. Coarse recycled concrete aggregate was replaced by natural coarse aggregate in three percent 25%, 50%, and 75%. Mechanical properties of high performance concrete are made from replacing natural coarse aggregate by 25% of recycled coarse aggregate, is considered the best among the other replacement ratios compared with the mixture of reference with slight reduction in compression strength by 8%, splitting tensile strength 8%, flexural strength by 9%, with increased total absorption by 4%, and no water under pressure permeable to the concrete specimen. In this study found that it can produce ultra-high performance fiber reinforced concrete using recycled concrete aggregate with high workability and low cement/water.

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