Evaluating Skid Resistance of Different Asphalt Concrete Mixes
Muetaz Almhdimohammed Alfalah
Muetaz Almhdimohammed Alfalah, Department of Civil Engineering, Near East University, 99138 Nicosia, Cyprus
Manuscript received on November 02, 2018. | Revised Version Manuscript Received on November 09, 2018. | Manuscript published on November 20, 2018. | PP: 15-18 | Volume-5 Issue-1, November 2018. | Retrieval Number: A0854115118
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Road traffic accident results in the death of over 1.2 million people, each year and 50 million more are injured. One of the main reasons for increase in traffic accidents is attributed to the low skid resistance of the highway surfaces which is a measure of the resistance of the pavement surface to sliding or skidding of the vehicle. Studying the effect that different asphalt concrete mixes have on skid resistance is very essential in order to provide the general public with safer roads and to help relevant authorities select best materials for pavement surfaces. The objective of the study is to compare the skid resistance of six different asphalt concrete mixes(i) asphalt concrete mix using local aggregate at the optimum Marshall asphalt content, ii) mixes with 0.5% and iii)1.0% asphalt contents higher than Marshall optimum asphalt content, iv) a mix designed using Superpave design procedure, v) a mix with steel slag to replace 30% of limestone aggregate, vi) and a mix with stone matrix aggregate gradation) and recommend the best mix that will provide higher skid resistance. The Skid resistance of the asphalt concrete mixes were determined in terms of their Skid resistance numberusing a modified British Pendulum skid resistance tester. The mixture with high skid number was the mixture with 30% slag followed by superpave. Increasing bitumen content for Marshall mix by 1% has the least skid number with about 12.8% decrease in skid resistance compared to the optimum binder content. Addition of steel slag in asphalt concrete mixes and using SMA mixes can be implemented to improve skidresistance of road surfaces, especially at highway intersections.
Keywords: Skid Resistance; British Pendulum; Skid Number; Superpave; Stone Matrix Aggregate; Slag; Micro Texture.