Cracking and Mechanical Properties of Airport Concrete Pavement with Fiber and Expansive Agent |
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| Authors: | Sun Yafei Gao Peiwei Liu Hongwei Zhang Lifang Lu Xiaolin Ju Xiangwei |
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| Institution: | 1. Department of Civil Engineering, Yancheng Institute of Technology, Yancheng, 224051, P.R.China;College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R.China
2. College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R.China |
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| Abstract: | Polypropylene fiber and expansive agent are used in airport concrete to improve its shrinkage cracking resistance and mechanical properties.The concrete specimens with amount content of polypropylene fiber or expansive agent or both of them are prepared.The morphology of specimens is observed by scanning electron microscope,the time when the first crack occurred is recorded through slap test,and the mechanical properties such as compressive strength and impact energies of concrete are measured.The results show that polypropylene fiber in concrete can reduce the shrinkage and delay the first crack,improve the impact resistance obviously,and improve the compressive strength slightly.Expansive agent can compensate the shrinkage and reduce cracks of concrete pavement markedly,and improve the mechanical properties of concrete pavement slightly.The study provides recommendations for cracking control of airport concrete pavement in the future. |
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| Keywords: | concrete pavement polypropylene fiber expansive agent crack mechanical performance |
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