Effect of Mineral fillers on the Performance of Hot Mix Asphalt HMA

USMAN GHANI
2020 Figshare  
Flexible pavements are commonly used in the world. The durable performance of flexible pavement is a very importantfactor that is being considered. Due to the large traffic loads, certain difficulties develop because flexible pavementsundergo specific deformations. In developing countries such as Pakistan, where there is an economic problem, somespecial corrective measures are required to improve the performance of Hot Mix Asphalt (HMA). The performanceof the HMA and its internal properties can
more » ... be improved through the use of mineral waste fillers to save pavementconstruction. In this study, the performance of HMA was investigated using different mineral fillers. The type ofminerals, used to verify the performance of HMA, was Stone Dust (SD), Brick Dust (BD) and Fly Ash (FA). TheMarshall Mix Design criteria (ASTM D1559) were adopted to investigate the volumetric properties of HMA. Inaddition, the optimal amount of each mineral load was determined using the Marshall Mix design. The preparedconventional samples were compared with the modified filler samples. The modification of AMF using mineral loadwas made by varying the percentages of fines from 5% to 9% with an increase of 0.5% in each sample of themineral load. However, the general modification was made by the weight of the aggregates present in the totalmixture. The bitumen used was grade 60/70, taken from Attock Refinery Limited Pakistan. The use of 7% of FAshowed the best results and the improvement of 31.60% of instability and against this stability, vertical deformationof 4.50 (mm) was observed. The results also showed that using 5% or less of mineral fillers have adverse effects onstability. This study highlighted the effect of mineral fillers to achieve a strong, durable resistance and the abilityto withstand certain discomforts related to temperature and moisture load. Therefore, it can be concluded that thelasting performance of HMA is possible using mineral fillers.
doi:10.6084/m9.figshare.11962023.v1 fatcat:2aywlongtzggvfkcvvt3ms7s6y