基于CAVF法的排水沥青混合料组成设计

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摘要 To harmonize the conflict between the durability and drainability of porous asphalt mixtures, the coarse aggregate void filling (CAVF) method is introduced to the design of a porous asphalt mixture. Bulk volume relative density is used as a measure to evaluate the compaction effect, and the temperature at which the compacting specimen reaches the maximum bulk volume relative density is selected as the optimum compacting temperature. At this temperature, a porous asphalt mixture specimen is modeled, and its properties, such as water stability, high-temperature stability, permeability, and skid resistance, are tested. Test results show that adopting the temperature at which the compacting specimen reaches the maximum bulk volume relative density as the optimum compacting temperature is reasonable. Moreover, the water stability, high-temperature stability, permeability, and skid resistance of the designed porous asphalt mixture exceed the specification requirements. The designed mixture shows good stability even at a high temperature of 70℃. This finding proves that the CAVF method presents advantages when used to design asphalt mixtures with a skeleton interdocking structure.

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	肖鑫
	张肖宁

关键词 ： road engineering, porous asphalt mixture, coarse aggregate void filling, compacting temperature, permeability

Abstract：To harmonize the conflict between the durability and drainability of porous asphalt mixtures, the coarse aggregate void filling (CAVF) method is introduced to the design of a porous asphalt mixture. Bulk volume relative density is used as a measure to evaluate the compaction effect, and the temperature at which the compacting specimen reaches the maximum bulk volume relative density is selected as the optimum compacting temperature. At this temperature, a porous asphalt mixture specimen is modeled, and its properties, such as water stability, high-temperature stability, permeability, and skid resistance, are tested. Test results show that adopting the temperature at which the compacting specimen reaches the maximum bulk volume relative density as the optimum compacting temperature is reasonable. Moreover, the water stability, high-temperature stability, permeability, and skid resistance of the designed porous asphalt mixture exceed the specification requirements. The designed mixture shows good stability even at a high temperature of 70℃. This finding proves that the CAVF method presents advantages when used to design asphalt mixtures with a skeleton interdocking structure.

Key words： road engineering porous asphalt mixture coarse aggregate void filling compacting temperature permeability

收稿日期: 2015-05-04

基金资助:Supported by the National Natural Science Foundation of China (51038004); and the National Key Technology Research and Development Program of the Ministry of Science and Technology of China during the "12th Five-Year Plan"(2012ZX07307001-009)

通讯作者: XIAO Xin E-mail: cszcgz420@sina.com

引用本文:

肖鑫, 张肖宁. 基于CAVF法的排水沥青混合料组成设计[J]. Journal of Highway and Transportation Research and Development, 2018, 12(1): 1-6.
XIAO Xin, ZHANG Xiao-ning. Design of Porous Asphalt Mixtures by Using the CAVF Method. Journal of Highway and Transportation Research and Development, 2018, 12(1): 1-6.

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http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/ 或 http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/Y2018/V12/I1/1

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