THE USE OF STEEL SLAG WASTE AS A REPLACEMENT OF GRAVEL IN MADURA FOR PLANNING THE FOOTING LAYER

Madura is one of the island that has a huge material potential. However, this island still use material from Java for road infrastructure development. Road pavement is needed to be as an infrastructure for social relationships, economic and culture. PT. Hanil Jaya Steel as the steel smelting factory is the one of industrial company around Surabaya that produce slag waste, the use of slag waste for minimalize buildup that brings negative effect in environment. Thus, this research is implemented the use slag steel waste as a replacement of Madura gravel, the gravel and sand will be taken from Bangkalan. This study aimed to investigate the gravel's influence of Bangkalan and slag characteristic on asphalt concrete mixture. Experimental method is conducted in this study by using the experiment to obtain the result, hence, the use of slag steel gravel on asphalt concrete construction can be various with slag levels; 0%, 10%, 20%, 30%, 40% and 50%. SNI procedure will be followed while checking Madura's aggregate, slag aggregate and the asphalt. The result of examination and analysis of asphalt concrete mixture characteristic using the variation level of slag steel gravel is shown performance improvement of asphalt concrete mixture. The stability result of asphalt level shows 6 % as the highest score, 5 % asphalt level of durability as the highest score, 5.5 % asphalt level of Marshall Quotient as the highest score. By using 40mm thickness and ± 3 mm tolerance as the footing layer.