RESILIENT MODULUS AND FATIGUE PERFORMANCE OF ASPHALT CONCRETE WEARING COURSE (AC-WC) MIXTURE WITH BNA BLEND 75:25 MODIFIED BITUMEN AND SCRAP TIRE RUBBER
<p align="justify">Constraction of flexible pavement is expected to have excellent stiffness and flexibility to support traffic load during its service life. The use of Modified Asphalt with BNA Blend 75:25 using scrap tire rubber on Asphalt Concrete Wearing Course is expected to imp...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/30830 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | <p align="justify">Constraction of flexible pavement is expected to have excellent stiffness and flexibility to support traffic load during its service life. The use of Modified Asphalt with BNA Blend 75:25 using scrap tire rubber on Asphalt Concrete Wearing Course is expected to improve the mixture stiffness while maintaining the mixture flexibility for crack resistance. <br />
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This thesis describes laboratory analysis of Asphalt Concrete Wearing Course (AC-WC) with the coarse gradation using 0, 25 and 50 percentage scrap tire rubber as subtitution for aggregate at fraction No. 50. The mixture performance was measured from Marshall Test, UMATTA testing of Resilient Modulus and fatigue performance using 4-Point Bending Test. <br />
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The result of Marshall test shown that decrease in level of the Optimum Bitumen Content (OBC) are 6.33% (0% mixture used scrap tire rubber), 6.25% (25% mixture used scrap tire rubber) and 6.18% (50% mixture used scrap tire rubber). Based on the results of Marshall Immersion Test showed that the percentage increase in scrap tire rubber raise the Marshall Index of Retained Strength, this indicates a better mix of resistance to the effects of water and temperatur. The result of Resilient Modulus Test UMATTA was 5,785 MPa for 25% AC-WC mixture used scrap tire rubber, at 20oC which is the highest value than the others. The result of Fatigue Test shown that the highest value was 120,090 cycles for 50% AC-WC mixture used scrap tire rubber. <br />
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Generally, the result of the research shown that the mixture used scrap tire rubbber as partially aggregate replacement was comparably low in compression with the value but it mixture gives better performance on the value of flexibility on resistance to fatigue.<p align="justify"> |
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