"HADEED" SLAG IN PAVEMENT CONSTRUCTION IN
Fouad Bayomy and Hamad AI-Abdul Wahhab
Saudi Iron and Steel Company (HADEED) in Jubail is
producing iron and steel from raw materials. Slag produced as a by- product
represents about 10 to 15% of the steel. By the end of 1987, the amount of slag
will be more than 130,000 ton/year. This study investigates the applicability
of utilization of this waste product in pavement construction to replace low
quality aggregates that are mostly available In the
Mix design optimization results proved the success of using HADEED slag as coarse aggregates to produce good quality asphalt mixes. Slag mixes showed significantly better stability, water damage resistance, split tensile strength and modulus of resilience than those made with natural crushed aggregates.
Findings are implemented in design charts which indicated a 20-35% saving in pavement thickness by using slag mixes.