Document Type : Original Article
Authors
1
Geology Department, Faculty of Science, Tanta University, Tanta, Egypt
2
Geological sciences department, national research centre, Egypt
3
Geological sciences department, National research centre, Egypt
4
Geology department, Faculty of science, Tanta University, Tanta, Egypt
5
Geology department, faculty of science, Tanta University, Tanta, Egypt
Abstract
The current study aims to evaluate the performance of hot mix asphalt (HMA) in terms of physical and mechanical properties using marble powder waste (MPW) as a substituting material for bag-house mineral filler. The marble powder waste is the by-product of the sawing and polishing processes of marble blocks that represent about 25-30% of the block volume. The marble wastes were characterized in terms of chemical composition, particle size distribution, and specific surface area using X-ray fluorescence (XRF), BT, and BET; respectively.
To achieve the above objective, five asphalt mixes were prepared according to Marshal Mix Design procedure, using 0% (control mix), 25%, 50%, 75%, and 100% marble powder as a bag-house mineral filler replacement. The prepared asphalt mixes were subjected to the Marshall tests in terms of stability, flow, bulk specific gravity (Gmb), air voids (Va), void in mineral aggregates (VMA), and void filled with asphalt (VFA), in addition to the loss of stability (LOS). The results showed that there is an increase in the stability of asphalt mixes with increasing the (MPW). In the same line, the loss of stability decreased drastically with the addition of (MPW). Moreover, the results of flow, air voids, voids of mineral aggregate, and voids filled with asphalt achieved the requirements of the Egyptian Code of Practice specification (ECP) for binder mix.
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