Authors : A.O. Olutaiwo , A.S. Adedimila and Umar Sidiq
Abstract: The significant role of liquid asphalt binders in the construction, maintenance and rehabilitation of bituminous pavements cannot be ignored. Incidentially, it is estimated that more than 98 % of Nigeria’s over 40.000 km surfaced road network is bituminous-surfaced. The common experience in maintenance and rehabilitation of roads in Nigeria is that the pavements fail very soon after rehabilitation. In conducting research into the possible causes of these early failures, this study takes a look at the characteristics of the liquid asphalt binders used in maintenance and rehabilitation of roads in the country. The nearly exclusive use of cutback asphalt, even when asphalt emulsions would give higher returns in terms of performance and cost-effectiveness, is evaluated, the faulty processes of production of cutback asphalt are highlighted and appropriate recommendations are made.
A.O. Olutaiwo , A.S. Adedimila and Umar Sidiq , 2008. An Examination of the Use of Liquid Asphalt Binders in Road Works in Nigeria. Journal of Engineering and Applied Sciences, 3: 134-142.