PVA-ECC稳定碎石混合料自愈合性能研究

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摘要 For improving the crack resistance of the semi-rigid base of an asphalt pavement and self-healing property to the base, the main materials (cement, fly ash, quartz sand, and polyvinyl alcohol) for a polyvinyl alcohol-engineered cementitious composite (PVA-ECC) were added to the regular materials for a new self-healing material for pavement base, i.e., PVA-ECC-stabilized crushed-stone mixture (PECR). Compressive strength tests were conducted on the base materials with various curing times to evaluate self-healing performance by comparing the strengths of standard specimens and specimens with cracking under different conditions (outdoor curing, laboratory curing, and dry-wet circulation). Results of the tests indicate that PECR has superior self-healing performance and that the compressive strength increases by 57.3% after self-healing. The compressive strength of PECR is higher than that of cement-stabilized crushed-tone mixture, and the peak compressive strength increases by 42%. The material that experienced dry-wet circulation has the highest compressive strength and the best self-healing performance.

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	曾梦澜
	楠丁
	吴超凡
	朱桃
	李君锋

关键词 ： road engineering, self-healing base material, compressive strength, PVA-ECC-stabilized crushed-stone mixture

Abstract：For improving the crack resistance of the semi-rigid base of an asphalt pavement and self-healing property to the base, the main materials (cement, fly ash, quartz sand, and polyvinyl alcohol) for a polyvinyl alcohol-engineered cementitious composite (PVA-ECC) were added to the regular materials for a new self-healing material for pavement base, i.e., PVA-ECC-stabilized crushed-stone mixture (PECR). Compressive strength tests were conducted on the base materials with various curing times to evaluate self-healing performance by comparing the strengths of standard specimens and specimens with cracking under different conditions (outdoor curing, laboratory curing, and dry-wet circulation). Results of the tests indicate that PECR has superior self-healing performance and that the compressive strength increases by 57.3% after self-healing. The compressive strength of PECR is higher than that of cement-stabilized crushed-tone mixture, and the peak compressive strength increases by 42%. The material that experienced dry-wet circulation has the highest compressive strength and the best self-healing performance.

Key words： road engineering self-healing base material compressive strength PVA-ECC-stabilized crushed-stone mixture

收稿日期: 2015-09-08

基金资助:Supported by the Advance and Innovation of Science and Technology Projects of Hunan Department of Transportation(No. 200911, No. 201110)

通讯作者: ZENG Meng-lan,E-mail address:menglanzeng@hnu.edu.cn E-mail: menglanzeng@hnu.edu.cn

引用本文:

曾梦澜, 楠丁, 吴超凡, 朱桃, 李君锋. PVA-ECC稳定碎石混合料自愈合性能研究[J]. Journal of Highway and Transportation Research and Development, 2016, 10(3): 13-17.
ZENG Meng-lan, NAN Ding, WU Chao-fan, ZHU Tao, LI Jun-feng. Self-healing Performance of PVA-ECC-stabilized Crushed Stone Mixture. Journal of Highway and Transportation Research and Development, 2016, 10(3): 13-17.

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http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/ 或 http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/Y2016/V10/I3/13

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