Abstract
This paper summarizes the laboratory investigation on porous friction course mixes that were modified with cellulose fibres and waste plastics. Porous friction course mixes of three different aggregate gradations were tested for predetermined binder content. The influence of each modifier on the volumetric properties, permeability, aged abrasion loss, and moisture susceptibility of porous friction course mixes were evaluated. In order to determine the significance level of effect of modifiers on the above properties, the tests for analysis of variance (ANOVA) and Tukey’s multiple mean comparisons were performed. Results of statistical analyses indicate that the gradations are major source of variations in all response properties. However, modifiers too appreciably contributed in reducing the moisture-induced damages. The findings suggest that shredded waste plastics are potentially useful as modifiers to porous friction course mixes.
Highlights
According to some projections (Mutha et al 2006) in India the consumption of plastics will increase about six-fold between the year 2000 and 2030
porous friction courses (PFCs) are called by different names by various agencies around the world, like porous asphalt (PA), open-graded friction course (OGFC), open-graded asphalt (OGA) etc. (Suresha et al 2007)
The present study was carried out with an objective of investigating the potential use of waste plastics (WP) as modifiers in PFC mixes, and on performing a comparative study on the behaviour of PFC mixes modified with WP and cellulose fibres (CF)
Summary
According to some projections (Mutha et al 2006) in India the consumption of plastics will increase about six-fold between the year 2000 and 2030. In the year 2030, plastic wastes for disposal (excluding recycled plastics) will increase 10 times compared to the situation in the year 2000–2001. A huge percentage of post-consumer plastic wastes are sent to landfill, while remaining is subjected to the process of incineration and recycling. Potential use of waste plastics (WP), in porous friction courses (PFCs), and generally in road construction industry can address these problems. PFCs are called by different names by various agencies around the world, like porous asphalt (PA), open-graded friction course (OGFC), open-graded asphalt (OGA) etc. The negativetexture of PFC surfaces enables considerable reduction in traffic tyre-noise. These are generally recommended for surfacing high-speed road-corridors, streets with wide carriageways and runway pavements. PA layers can be used as drainage layer sandwiched between waterproofing layer and wearing course, over bridge decks (Kim et al 2009)
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