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Effect of Aggregate Gradation on Reducing Reflection Crack | ||
| Journal of Engineering and Sustainable Development | ||
| Article 1, Volume 14, Issue 2, 2010, Pages 212-225 | ||
| Author | ||
| lecturer Qais S | ||
| Abstract | ||
| The rehabilitation of cracked flexible pavement roads by overlaying, without any improvement, is rarely a durable solution, as the cracks rapidly propagate through the new asphalt layer. Cracks reflection through a road structure is one of the main causes of premature pavement deterioration which shortens the service life of overlays. The prime objective of the present study is to find the suitable remedies to reduce reflection cracks, by optimizing overlay asphalt mix design after considering the properties of various available material types, amount and applied conditions. This will include: one type of grade and five contents of asphalt cement, Two types of aggregate gradation and one type with different A total of 72 Marshall Specimens is prepared and tested by Marshall Method to estimated optimum binder content under traffic loading of rolling tire. 42 Compacted asphalt concrete prism sample are prepared and tested using the wheel track apparatus. It can concluded that use of surface agg. gradation type II give the highest resistance to reflection cracking as compare with Gradation I. | ||
| Keywords | ||
| Reflection crack; Additive; and Wheel tracking apparatus | ||
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