不同隔离层水泥混凝土路面层间力学性能试验研究

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摘要 This research explored the variation in the bond-breaking effect with a variety of bond-breaking layers installed between concrete pavement surface slabs and lean concrete base to determine the parameters for the structural analysis of pavements with bond-breaking layers and to optimize the selection of such layers for practical road engineering projects. This study tested the bond stresses and frictional forces at the slab-base interface of pavements under different bond-breaking conditions, Moreover, the dynamic stresses at the bottom of the pavement surface slabs atop different bond-breaking layers were tested via indoor straight pavement fatigue tests and field tests to determine the mechanical properties of slab-base interface treated with different bond-breaking layers in a number of highway projects in Hunan and Guangdong provinces. The bond-breaking media applied in this research includes a 3 cm asphalt concrete (AC), 1 cm emulsified asphalt slurry seal (EASS), geotextile, and emulsion wax curing agent (EWCA). The findings from the field tests for the bond stress between slab-base layers indicated that EASS and EWCA outperformed geotextile in terms of reducing friction or bond stress at the slab-base interface. Furthermore, the findings from the indoor straight pavement fatigue tests indicate that AC exhibited improved performance over EASS and EWCA with no bond-breaking layer in terms of alleviating stress. The mechanical properties of slab-base interface with different bond-breaking media derived from this research provide a scientific reference for pavement design and construction control in practical road engineering projects.

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	姚佳良
	胡可奕
	袁剑波
	张起森

关键词 ： road engineering, mechanical properties of slab-base interface, tests for bond stress and indoor straight pavement fatigue tests for mechanical properties, bond-breaking layer of cement concrete pavement, lean concrete base, stress alleviation

Abstract：This research explored the variation in the bond-breaking effect with a variety of bond-breaking layers installed between concrete pavement surface slabs and lean concrete base to determine the parameters for the structural analysis of pavements with bond-breaking layers and to optimize the selection of such layers for practical road engineering projects. This study tested the bond stresses and frictional forces at the slab-base interface of pavements under different bond-breaking conditions, Moreover, the dynamic stresses at the bottom of the pavement surface slabs atop different bond-breaking layers were tested via indoor straight pavement fatigue tests and field tests to determine the mechanical properties of slab-base interface treated with different bond-breaking layers in a number of highway projects in Hunan and Guangdong provinces. The bond-breaking media applied in this research includes a 3 cm asphalt concrete (AC), 1 cm emulsified asphalt slurry seal (EASS), geotextile, and emulsion wax curing agent (EWCA). The findings from the field tests for the bond stress between slab-base layers indicated that EASS and EWCA outperformed geotextile in terms of reducing friction or bond stress at the slab-base interface. Furthermore, the findings from the indoor straight pavement fatigue tests indicate that AC exhibited improved performance over EASS and EWCA with no bond-breaking layer in terms of alleviating stress. The mechanical properties of slab-base interface with different bond-breaking media derived from this research provide a scientific reference for pavement design and construction control in practical road engineering projects.

Key words： road engineering mechanical properties of slab-base interface tests for bond stress and indoor straight pavement fatigue tests for mechanical properties bond-breaking layer of cement concrete pavement lean concrete base stress alleviation

收稿日期: 2012-07-11

基金资助:Supported by the National Natural Science Foundation of China (No.51178064)

通讯作者: YAO Jia-liang, yao26402@126.com E-mail: yao26402@126.com

引用本文:

姚佳良, 胡可奕, 袁剑波, 张起森. 不同隔离层水泥混凝土路面层间力学性能试验研究[J]. Journal of Highway and Transportation Research and Development, 2013, 7(1): 1-8.
YAO Jia-liang, HU Ke-yi, YUAN Jian-bo, ZHANG Qi-sen. Experimental Study on the Mechanical Performance of the Interface between Concrete Pavement and Lean Concrete Base Treated with Different Bond-breaking Layers. Journal of Highway and Transportation Research and Development, 2013, 7(1): 1-8.

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http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/ 或 http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/Y2013/V7/I1/1

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