Experimental Study on the Dynamical Mechanical Performance of Nanomodified Recycled Aggregate Concrete

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Journal Article
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences, 2017, 44 (9), pp. 92 - 99
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纳米再生骨料混凝土的动态力学性能试验研究_李文贵.pdfPublished Version615.81 kB
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© 2017, Editorial Department of Journal of Hunan University. All right reserved. The dynamic mechanical performances of recycled aggregate concrete (RAC) incorporating with 1% to 2% nano-SiO2or nano-CaCO3were tested by Split Hopkinson Pressure Bar (SHPB). The effects of different kind is of nanoparticles and different dosages on the mechanical performances of RAC were investigated. The results revealed that RACs with nano-SiO2and nano-CaCO3all zhowed higher dynamic compressive strength than the control RAC, and the nano-SiO2was more effectire than nano-CaCO3in enhancing the dynamic compressive strength of RAC. But RACs with high dosage of nano-SiO2or nano-CaCO3usually showed lower dynamic compressive strength than that of low dosage one, and the RAC incorporating with 1% nano-SiO2achieved the highest dynamic compressive strength. Nano-CaCO3exhibited more advantage in improving the deformation performance and energy absorption capacity of RAC. Both nano-SiO2modified RAC and nano-CaCO3modified RAC showed lower dynamic increase factor than control RAC.
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