Rutting resistance of asphalt mixture with cup lumps modified binder

Global Congress on Construction, Material and Structural Engineering 2017

材料科学;土木建筑工程

Shaffie, E.^1 ; Wan Hanif, W.M.M.^1 ; Arshad, A.K.^1,2 ; Hashim, W.^1

Faculty of Civil Engineering, Universiti Teknologi MARA, Uitm Shah Alam, Selangor, Malaysia^1

Institute for Infrastructure Engineering and Sustainability Management (IIESM), Universiti Teknologi MARA, Selangor, Shah Alam, Malaysia^2

关键词: Climatic conditions;    Construction design;    Cost of maintenance;    Pavement performance;    Pavement structures;    Polymer-modified binders;    Rutting performance;    Volumetric properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/271/1/012056/pdf
DOI  :  10.1088/1757-899X/271/1/012056

来源: IOP

【 摘 要 】

Rutting is the most common pavement distress in pavement structures which occurs mainly due to several factors such as increasing of traffic volume, climatic conditions and also due to construction design errors. This failure reduced the service life of the pavement, reduced driver safety and increase cost of maintenance. Polymer Modified Binder has been observed for a long time in improving asphalt pavement performance. Research shows that the use of polymer in bituminous mix not only improve the resistance to rutting but also increase the life span of the pavement. This research evaluates the physical properties and rutting performance of dense graded Superpave-designed HMA mix. Two different types of dense graded Superpave HMA mix were developed consists of unmodified binder mix (UMB) and cup lumps rubber (liquid form) modified binder mix (CLMB). Natural rubber polymer modified binder was prepared from addition of 8 percent of cup lumps into binder. Results showed that all the mixes passed the Superpave volumetric properties criteria which indicate that these mixtures were good with respect to durability and flexibility. Furthermore, rutting results from APA rutting test was determined to evaluate the performance of these mixtures. The rutting result of CLMB demonstrates better resistance to rutting than those prepared using UMB mix. Addition of cup lumps rubber in asphalt mixture was found to be significant, where the cup lumps rubber has certainly improves the binder properties and enhanced its rutting resistance due to greater elasticity offered by the cup lumps rubber particles. It shows that the use of cup lumps rubber can significantly reduce the rut depth of asphalt mixture by 41% compared to the minimum rut depth obtained for the UMB mix. Therefore, it can be concluded that the cup lumps rubber is suitable to be used as a modifier to modified binder in order to enhance the properties of the binder and thus improves the performance of asphalt mixes.