Open AccessStudy on early dynamic mechanical properties of inorganic polymer based fast hardening concrete
Author(s) -
Hengbo Zhang,
Jinyu Xu,
Xu Luo,
Liangxue Nie,
Yanan Wang
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/510/5/052033
Subject(s) - materials science , composite material , silica fume , split hopkinson pressure bar , toughness , hardening (computing) , strain hardening exponent , strain rate , compressive strength , slag (welding) , layer (electronics)
For the purpose of explore the early dynamic mechanical properties of inorganic polymer based fast hardening concrete (IPFC), two groups of IPFC specimens were prepared with slag and silica fume as the main raw materials, flake alkali and water glass as alkali activators: slag based fast-hardening concrete (SFC) and silica fume-slag based fast-hardening concrete (SSFC). The dynamic mechanical properties of specimens at the age of 3 hours were studied by Φ 100 mm split Hopkinson pressure bar (SHPB) test device. The results show that, the dynamic compressive strength and peak toughness of SFC and SSFC both have obvious strain-rate sensitivity, and the peak stress of SSFC is higher than that of SFC, while the peak toughness is lower than that of SFC overall; The peak strain of SFC and SSFC shows no rate dependence, and the peak stress changes little with strain rate in the range of 30 to100 s −1 , the peak strain of SFC is generally higher than that of SSFC.