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| Self-healing Performance of PVA-ECC-stabilized Crushed Stone Mixture |
| ZENG Meng-lan1, NAN Ding1, WU Chao-fan2, ZHU Tao1, LI Jun-feng1 |
1. School of Civil Engineering, Hunan University, Changsha Hunan 410082, China;
2. Hunan Communications Research Institute, Changsha Hunan 410015, China |
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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.
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Received: 08 September 2015
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| Fund:Supported by the Advance and Innovation of Science and Technology Projects of Hunan Department of Transportation(No. 200911, No. 201110) |
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Corresponding Authors:
ZENG Meng-lan,E-mail address:menglanzeng@hnu.edu.cn
E-mail: menglanzeng@hnu.edu.cn
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2016, Vol. 10 
