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KMID : 1024520010100040311
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Journal of the Environmental Sciences
2001 Volume.10 No. 4 p.311 ~ p.314
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Environmental Friendly Characteristics of CRM Asphalt Concrete and Optimal Mixing Ratio
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Ryu Byeong-Ro
Han Yang-Su
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Abstract
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The asphalt mixture with CRM(Crumb Rubber Modifier) is known to show a better performance in resisting thermal cracking, fatigue cracking and rutting compared with the conventional mixture. The laboratory tests on the physical characteristics of indirect tensile strength, density, flow and Marshall value of the CRM asphalt were conducted. The test results show that CRM asphalt has better physical characteristics than that of conventional asphalts. And the analysis on the noise reduction effect, penetration capacity from the field test on the national road in Haksan of Chungbuk, and recycling of tire waste were conducted. From this study, the results show that 1% CRM asphalt has higher the noise reduction effect and penetration capacity that those of conventional asphalts. And, optimal contents of crumb rubber modifier in the asphalt binder is one percent. In this case, crumb rubber modifier were used 10 kg to make the asphalt binder of one cubic meter. So it was named as Eco-asphalt.
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KEYWORD
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CRM asphalt, Eco-asphalt, noise reduction, penetration, recycling of tire waste
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