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Investigation the Effect of Aggregates on Hot Mix Asphalt ( HMA ) Performance-A Case Study
| Content Provider | Semantic Scholar |
|---|---|
| Author | Tessema, Getu Tamiru Ponnurangam, Palani |
| Copyright Year | 2019 |
| Abstract | Aggregate types and gradation are one of the characteristics of aggregates that affected the properties of HMA performance. Therefore, the main objective of this research is to investigate the effects of aggregates types on hot mix asphalt performance. In order to get the desired objective, a systematic methodology was adopted which includes field investigation, and laboratory tests was carried. While the purposive techniques was used to collect aggregate samples. The laboratory test results of aggregate types were fulfilled and achieve the requirement of Ethiopia Road Authority (ERA). The laboratory test result of basalt, rhyolite and limestone aggregate HMA mix design volumetric properties, stability and flow value are affected by aggregate gradation. The same gradation of laboratory test result of HMA mix design volumetric properties, stability and flow values are impressively affected by aggregate types. In all aggregate types trial mixes of HMA rutting depth were increase with increasing of cycle time of load. For both type of aggregate gradation, the minimum rut depth was achieved in gradation trial mix 3. The maximum rut depth were achieve in gradation trial mix 5 for basalt and rhyolite, but for limestone aggregate the maximum rut depth was achieve in gradation trial mix 1. In trial mix 1 and 2 limestone’s aggregate gradation is achieved maximum value of rut depth and in trial mix 3, 4 and 5 rhyolite aggregate is achieved maximum value of rut depth. For both types of aggregate gradation maximum dynamic stability values are achieved in gradation trial mix 3 and the minimum values are achieved in gradation trial mix 5. The maximum dynamic stability value was achieve in basalt aggregate and gradation trial mix 4 and 5 only limestone aggregate was achieve the minimum requirement of dynamic stability. Generally, aggregate types and its gradation are affected HMA properties and rutting performance. The gradation of medium to lower limit of Ethiopia Road Authority (ERA) standard technical specification use to produce good performance of HMA. Limestone aggregate was hydrophobic which reduce the problems of stripping of aggregate during wet and subjected to water. As this study was done for specific location and specific aggregate types, it is recommended as more laboratory and field investigation should be performed on same parts of the country. Effect of aggregate source and shape of the same aggregate types on HMA properties are another perspective. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.ijerd.com/paper/vol15-issue1/E15013140.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
