THE QUALITY CONTROL MEASURE OF ASPHALT MIX DESIGN AS
SOLUTION TO PAVEMENT FAILURE
Salihu Andaa Yunusa and Abubakar Muhammad Ahmadu
Department of Civil Engineering
Kaduna Polytechnic, Kaduna
ABSTRACT
This paper covered major aspect of asphalt mix design analysis, as the quality control measure of asphalt production, using British Method of Asphalt mix design procedure. It is aimed in highlighting the important of designed Asphalts as compared to ordinary mixed Asphalt in Asphalt production, for any pavement structural work. This is to analysis the merit of designed and control Asphalt product as required by BS 594, T49 and BS 4691, in Asphalt and Bitumen requirement. It equally include the whole laboratory test analysis, to determine the physical and geotechnical properties of the materials needed for the mix design, in order to attain the required data for the design procedure, in accordance to the parent material types and location and to control specific density of the designed Asphalt, that will be suitable, adoptable, durable, economical, workable and generally safe for the pavement structural design objective of the weather condition in any specified locality. This is equally aimed at controlling the rate of structure pavement failure in Nigeria as a Nation before the design age, on this note, major factors that may lead to structural pavement failure, were generally treated. The design covered both Asphaltic Binder course of 60mm thick and Asphaltic wearing course of 40mm as flexible pavement with Bitumen viscosity of 60/70. Basically the extraction of the design to determine, the Bitumen content (B.C), sieve analysis, stability, flow and void Ratio were equally include in accordance with British stand as the control measure. All individual result of the design mix were adequately presented. These have shown that generally Asphalt mix design is necessary, as measure of quality control of Asphalt both on Binder course and wearing course. Also it is very important to note, that in any pavement structure as part of Civil Engineering Project on road Transportation, either surface dressing and any other classis of flexible pavement, for Government and Individual, Design and Control should be applicable to maintain standard and control pavement failure.