![]() ![]() Six cement-to-asphalt (C/A) ratios were considered in the study: 0.05, 0.10, 0.15, 0.20, 0.25 and 0.30 by volume of asphalt binder. The maximum useful amount of polymer that could be added to the prepared asphalt emulsion is discovered by the study to be at 7 percent whereas the blending time of 20 minutes was selected as the useful blending time to blend NRL in prepared asphalt emulsion.ĪBSTRACT This study investigates the effect of cement additive on some properties of asphalt binder using Superpave testing methods. ![]() From the result, it can be concluded that natural rubber latex can be used to improve the rheological properties of modified asphalt emulsion residue. The addition of natural rubber latex (NRL) into the asphalt emulsion was made in a cylindrical flask that is equipped with a propeller with three variables:the amount of polymer, mixing time and blending velocity. Post blending method was used to prepare polymer modified asphalt emulsion. In this study, natural rubber latex was selected as a modifier to modify asphalt emulsion. However, there are very few studies that focus on modification of asphalt emulsion that were used for cold mix asphalt (CMA). From the study, it is proven that polymer modified asphalt can improve asphalt performance. There are a lot of studies that have been conducted to modify asphalt for the preparation of hot mix asphalt (HMA). This paper presents an overview of the researches which have been conducted on polymer modified asphalt emulsions using various types of polymer and performance of its application.Īsphalt is an important material that has been used widely in road paving industry as a binder for aggregate. The absence of an agreed protocol has allowed various techniques to be used by testing laboratories in order to obtain asphalt emulsion residue. The blending method has important influence on polymer network distribution and will affect the performance of polymer modified asphalt emulsions. Polymer can be added into asphalt emulsion in three ways: 1) pre-blending method, 2) simultaneous-blending method and 3) post-blending method. Various types of polymers can be used to prepare polymer modified asphalt emulsion such as styrene butadiene styrene (SBS) block copolymer, ethylene vinyl acetate (EVA), polyvinyl acetate (PVA), styrene butadiene rubber (SBR) latex, epoxy resin and natural rubber latex. Nowadays, polymer modified asphalt technology is used by researcher and manufacturer in asphalt emulsion to improve the performance of asphalt emulsion. Due to the increasing number of traffic loads and volume, the used of normal asphalt emulsion is not enough to prevent the pavement from deterioration. The history of asphalt emulsions and its application in road construction begin in the early part of 20 th century. ![]() Asphalt emulsion has several advantages compared to normal asphalt such as eco-friendly, easy to handle at ambient temperature and energy saving material because it does not need any heating process in its application. In road paving industry, asphalt emulsion is used for cold mix application such as chip seal, slurry seal, microsurfacing, cold recycled mixture and etc. ![]()
0 Comments
Leave a Reply. |