Experimental investigation of seashells used as filler in hot mix asphalt

• Published in: The international journal of pavement engineering Vol. 16; no. 6; pp. 502 - 509
• Main Authors: Arabani, M., Babamohammadi, S., Azarhoosh, A.R.
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 03-07-2015; Taylor & Francis LLC
• Subjects: Asphalt; Asphalt pavements; Consumption; Cost reduction; Deformation; Demand; Environment protection; Environmental protection; Extraction; Fatigue (materials); fatigue life; Fillers; HMA; Moisture; permanent deformation; seashell; stripping; Tensile strength
• ISSN: 1029-8436; 1477-268X
• DOI: 10.1080/10298436.2014.943132

The construction and maintenance of roads consume a large amount of virgin aggregate. The use of waste, instead of virgin materials, helps reduce demand for the extraction and landfill, which causes environmental protection and cost reduction. In this study, the use of seashell as a replacement of virgin filler was assessed in hot mix asphalt (HMA). The results of a laboratory study for evaluating the properties of HMA mixtures were investigated using indirect tensile fatigue, indirect tensile strength and permanent deformation tests. The results indicated that the application of seashells as a mineral filler improved the fatigue life and permanent deformation of HMA at different temperatures. It was also determined that the mixtures with seashells showed lower moisture susceptibility than conventional HMA. The study showed that seashells in the dust form could be used as a filler material in HMA when being available.