Usage of two biomass ashes as filler in hot mix asphalt

•The feasibility of using rice husk ash and date seed ash as alternative filler in hot mix asphalt was investigated.•The use of RHA and DSA enhanced the Marshall stability and stiffness of asphalt mixtures.•The usage of RHA and DSA fillers improved the rutting performance of asphalt mixtures.•Asphal...

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Bibliographic Details
Published in:Construction & building materials 2018-05, Vol.170, p.547-556
Main Authors: Tahami, Seyed Amid, Arabani, Mahyar, Foroutan Mirhosseini, Ali
Format: Article
Language:English
Subjects:
Analysis
Asphalt concrete
Biomass
Chemical properties
Date seed ash
Fatigue
Hot mix asphalt
Materials
Mechanical properties
Natural resource conservation
Rice husk ash
Rutting resistance
Stiffness modulus
United States
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Summary:•The feasibility of using rice husk ash and date seed ash as alternative filler in hot mix asphalt was investigated.•The use of RHA and DSA enhanced the Marshall stability and stiffness of asphalt mixtures.•The usage of RHA and DSA fillers improved the rutting performance of asphalt mixtures.•Asphalt mixtures with RHA and DSA showed better fatigue resistance compared to control mixtures. Today, waste materials have been increasingly utilized as alternative raw materials in asphalt mixtures in order to decrease construction costs, conserve natural resources and reduce environmental problems. The main purpose of this research is to investigate the potential of using two biomass ashes, which are agricultural waste/byproducts namely rice husk ash (RHA) and date seed ash (DSA), as filler material in hot mix asphalt (HMA) by replacing conventional filler at different percentages. The percentages of DSA and RHA separately used in the mixtures were: 0%, 25%, 50%, 75% and 100%. The effects of DSA and RHA fillers on mechanical properties of asphalt mixtures were assessed using Marshall stability, MQ, indirect tensile stiffness modulus, wheel track and four point bending fatigue tests. Furthermore, the asphalt mastics were produced to evaluate the effect of fillers on mastic viscosity. Based on the results, asphalt mixtures with DSA and RHA fillers showed higher stability and stiffness modulus in comparison with the control mixture. Also, using biomass ashes improved the thermal sensitivity of mixtures and the adhesive force between asphalt and aggregates, which caused an enhancement in rutting resistance and fatigue life of HMA mixtures.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2018.03.102