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Title |
Mechanical Properties of Porous Concrete For Pavement Using Recycled Aggregate and Polymer
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Keywords |
포러스 콘크리트; 폴리머; 재생골재; 공극률; 압축 및 휨강도; Porous concrete; Polymer; recycled aggregate; void ratio; compressive and flexural strength |
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Abstract |
The purpose of this study is to utilize recycled concrete aggregates as permeable pavement materials. This study evaluates mechanical properties and durability of porous concrete depending on mixing rates of recycled aggregates and polyme. As a result, void ratio and permeability coefficient of porous concrete for pavement increased a little as mixing rate of recycled aggregates increased. Void ratio and permeability coefficient increased a lot as mixing rate of polymer increased. As polymer was mixed , national regulation of permeable concrete for pavement(8% and 0.01cm/sec) was met. Compressive strength and flexural strength decreased as mixing rate of recycled aggregates increased but they increased a lot as mixing rate of polymer increased. Even when recycled aggregates were mixed 75% with 10% polymer mixed, national regulation of pavement concrete(18MPa and 4.5MPa) was met. In addition, regarding sliding resistance, BPN increased as mixing rate of recycled aggregates increased. But BPN decreased as polymer was mixed. Compared to crushed stone aggregates, abrasion resistance and freeze-thaw resistance decreased as mixing rate of recycled aggregates Increased. When polymer was mixed, abrasion resistance and freeze-thaw resistance improved remarkably. Compared to non-mixture, 10% mixture of polymer improved abrasion resistance and freeze-thaw resistance about 8.6% and 3.8times respectively.
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