고로슬래그 콘크리트의 투수특성에 관한 실험적 연구

Abstract

The pavement is generally used on the highways, local loads, roads for bicycle riding and neighborhood living facility such asparking lot, plaza, park and sports facilities. However, the pavement material that is usually used on the most of roads is impermeableasphalt-concrete and cement-concrete. If the pavement material is impermeable, many problems can be happened on the drainagefacilities in the rainy season. Additionally, a lot of rainwater on the pavement surface cannot permeate to the underground and flowsto the sewage ditch, stream and river, etc. If a lot of rainwater flows at once, the floods can be out along the streams and rivers. So,underground water can be exhausted. Micro organisms cannot live in the underground. Recently, many studies has been conducted toexploit the permeable concrete that has high performance permeability. However, it is required to develop the permeable concretewhich has high strength and durability. In this study, permeable and strength tests were performed to investigate the permeablecharacteristics of porous concrete according to fine aggregate content and substitution ratio of blast furnace slag. In this test, crushedstones with 10～20 mm and sand with 5～10 mm were used as a coarse aggregate and a fine aggregate respectively. The substitutionratio of blast furnace slag to cement weight is 0 %, 15 %, and 30 %. The ratio of fine aggregate to total aggregate is 0 %, 18 %,and 35 %. As a result, permeability coefficient was decreased according to fine aggregate ratio of total aggregate. Compressive strengthwas also decreased according to substitution ratio of blast furnace slag.