The Effect of Filler Type and Content on Hot Asphalt Concrete Mixtures Properties
Al-Rafidain Engineering Journal (AREJ),
2013, Volume 21, Issue 6, Pages 88-100
Asphalt concrete consists of coarse aggregates, fine aggregates, filler, and asphalt cement(used as a binder)mixed together in proportions according to a specified specifications.
Mineral filler is the inert material passing the No.200 sieve , occupies the void space between coarse aggregates particles and pores within the aggregates particles .There were many types of local waste materials that can be used successfully used as a mineral filler in hot asphalt concrete mixtures instead of ordinary portland cement and limestone powder.
The main objective of this research is to investigate experimentally the effect of using different types of fillers, and content, on hot asphalt concrete mixtures. Several specimens of hot asphalt mixtures were prepared according to (SORB/R9) using the obtained Optimum Asphalt Content (O.A.C.) with three percentages of the fillers of ordinary portland cement, lime stone powder, and waste glass powder at 4%, 6% and 8% by weight of total aggregates, respectively.
The results of Marshall tests on mix design of hot asphalt concrete mixtures, for the wearing course were concluded that, using the waste glass powder as a filler, with its optimum content of 8% (by the weight of total aggregates), leading to produce asphalt concrete mixtures with higher Marshall Stability, lower Flow, and lower voids in total mix comparing with ordinary portland cement and lime stone powder fillers.
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