The Effect of Polypropylene Fiber as an Additive in Open Graded Emulsion Mixture

The impact of global warming in Indonesia is the longer dry season in some areas. It is important to reduce gas emission that is associated with global warming. In road construction, Cold Asphalt Emulsion Mixture (CAEM) is considered more environmentally friendly than hot mix asphalt because it emits fewer emissions; however, its strength and durability are not as good as those of hot mix asphalt are. In this research, the type of gradation used is open graded. In order to improve the performance of CAEM, 12 mm-long polypropylene fiber was added as an additive. The main purpose of this research is to analyze the effect of adding polypropylene fiber to Open Graded Emulsion Mixture (OGEM) and to determine the curing effects on its parameters. Further analysis of the results showed that polypropylene fiber content at 0.1% could increase the stability of mixture but increasing the content of polypropylene fiber in mixture tended to decrease the stability of OGEM. Polypropylene fiber performed well to significantly reduce the flow value, but it only performed better at the early age of mixtures.