Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Asphalt Mixture


Characteristics of Asphalt Binder and Mixture Modified With Waste Polypropylene

Mohammed Y. Fattah; Wissam, N. Abdulkhabeer; Miami M. Hilal

Engineering and Technology Journal, 2021, Volume 39, Issue 8, Pages 1224-1230
DOI: 10.30684/etj.v39i8.1716

Improving asphalt materials to develop the overall performance of asphalt binders and mixtures has been the focus of several investigations made over the past few decades. The application of discarded waste plastics in asphalt modification was one of the steps taken in this direction. Using waste materials in pavement construction would not only enhances asphalt properties but would also bring out significant saving in road material costs and help towards tackling disposal problems of such waste materials, which tend to be hazardous in as much as they can cause pollution of water, soil, and air. The purpose of this paper is to investigate the probability of using Waste Polypropylene (WPP) as modifier to enhance the properties of asphalt binder and mixture. In this paper, two types of asphalt binder (40/50) and (60/70) were used. Three percentages of WPP (1%, 3%, and 5%) were added to (60/70) asphalt binder/mixture to obtain the modified samples that were tested using several laboratory tests and their results were compared to original (60/70) asphalt binder/mixture and to those of (40/50) asphalt binder/mixture besides comparing with the Iraqi Specifications. The outcomes indicated that 3% of WPP was the optimum percentage that gave best results for asphalt binder and asphalt mixture compared to original and other percentages of asphalt samples and according to the Iraqi Specifications.

Most Distresses Causes in Flexible Pavement For Baghdad Streets At Last Years

Engineering and Technology Journal, 2010, Volume 28, Issue 18, Pages 894-906

It is clearly evident that the service sector, especially recently, requiring discussion and solution. Because this section involves the daily life of the citizen and is complex in nature and requires urgent consideration to determine points of weakness during implementation stage in Baghdad city (both sides). Road and highway are vital in Baghdad where roads maintenance having a great significance.
Through observation of materials used and the performance of working standard involved, it has become operant where failure can be visible. This paper reflects evidence through observation of laboratory tests of asphalt mixtures and their failure and the repeat of divergence from. General specification for road and bridge. Department of planning and studies 2003, revised edition 2003. It also, covers operational performance of road and streets covered by this study by comparison of deviations between laboratory tests results for these roads and
streets and actual performance after certain period of time. The conclusion shows special divergence (through aggregate graduation of asphalt mixture, bitumen percentage, marshal stability, degree of compaction and asphalt layer thickness). These divergences are effective and commonly repeated which require certain action to a void failure by doing job mix formula according to the required
specification for the used layer course in addition to used the raw material that successful in laboratory tests with the implementation with the correct steps that giving the correct depth of layers. Consequently, better performance standards can be achieved.