Journal of Environmental Health Sciences (한국환경보건학회지)
- Volume 3 Issue 1
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- Pages.53-56
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- 1976
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- 1738-4087(pISSN)
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- 2233-8616(eISSN)
Studies on the Sanitary Scientific Utilization of Asphalt (II) Air Oxidation of Asphalt.
아스팔트의 위생학적 이용에 관한 연구(제 2보)
Abstract
The air oxidations of asphalt at temperatures ranging from 190$\circ$C to 270$\circ$C were studied for changes in physical properties, proportions and chemical characteristics of asphalt compositions, weak acid and very weak acid contents. The following results were obtained: 1) Oils and resins of asphalt components are oxidized to asphaltenes by blowing(Air oxidation) 2) At 270$\circ$C, asphaltenes begin to undergo a change into benzene insoluble after approximately 12 hours of air oxidation. 3) Weak acid increases at the oxidation temperature below 200$\circ$C. While very weak acid, presumably phenols, generally increases without regard to the blowing(Air oxidation) temperature.
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