The effects of temperature and strain rate on the compressive strength of geopolymeric concrete
Wang Zhikun1, Xu Jinyu1,2, Fan Jianshe3, Miao Huadong3, Liu Yuanfei1
1. Department of Airfield and Building Engineering, Air Force Engineering University, Xi’an 710038, Shaanxi, China;2. College of Mechanics and Civil Architecture, Northwest Polytechnic University, Xi’an 710072, Shaanxi, China;3. The Ninth Engineering Head Group of China Airport, Xinjin 611430, China
Abstract：The dynamic compressive strength of geopolymeric concrete at elevated temperatures was investigated using a self-designed high temperature SHPB system. The results show that the dynamic compressive strength of geopolymeric concrete at 200℃ is higher than that at room temperature, but it decreases dramatically at 800℃. The strain rate increases approximately linearly with increasing projectile velocity. At a given projectile velocity, the strain rate changes slightly at 200-600℃ and increases evidently at 800℃ compared with that at room temperature. At elevated temperatures, the additional stress of geopolymeric concrete specimen caused by lateral confinement could be ignored, thus the strain rate effect on dynamic increase factor (DIF) obtained from test data can reflect the inherent nature of geopolymeric concrete. DIF increases with the logarithm of strain rate by linear approximation over the strain rate range of 30-130 s-1, and the strain rate effect is more obvious at high temperature.
王志坤;许金余;范建设;苗华东;刘远飞. 温度、应变率对地质聚合物混凝土抗压强度的影响[J]. , 2014, 33(17): 197-202.
Wang Zhikun;Xu Jinyu;Fan Jianshe;Miao Huadong;Liu Yuanfei. The effects of temperature and strain rate on the compressive strength of geopolymeric concrete. , 2014, 33(17): 197-202.
2014, Vol. 33 
