UTILIZATION OF "HADEED" SLAG IN PAVEMENT CONSTRUCTION IN SAUDI ARABIA

Fouad Bayomy and Hamad AI-Abdul Wahhab

ABSTRACT

The 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 Eastern Province of Saudi Arabia.

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.