RESEARCH ON MECHANICAL PROPERTIES AND PORE STRUCTURE OF REACTIVE POWDER CONCRETE
In this work, the influence of water-binder ratio (W/B), sand-binder ratio (S/B), silica fume (SF), ground granulated blast furnace slag (GGBFS) and curing temperature on the mechanical properties of reactive powder concrete (RPC) is reported.The orthogonal test was used to measure and analysis significant influencing factors.On this basis, the optimal W/B, amount of SF, and steel fibers were determined by single factor experiment.Results indicated that the optimal W/B and ratio of SF to cement were 0.18 and 0.35, respectively.Moreover, RPC with 1.5 vol.% steel fibers had excellent fluidity and its compressive strength was up to 205.3 MPa after heat water-curing at 90℃, and 303.5 MPa after curing at high temperature of 250℃.Furthermore, the pore structure of RPC curing at different temperatures was studied by using mercury intrusion porosimetry (MIP).MIP tests showed that the small pore under 10 nm in RPC without aggregates gradually increased while the most probable pore radius decreased with increasing the curing temperature.These results could be used to explain the compressive strength development of RPC curing under high temperature.
Reactive powder concrete (RPC) Compressive strength Infrared spectrum (IR) Mercury intrusion porosimetry (MIP)
Jian Lin Nannan Zhang Qiyuan Zhang Qionglin Fu Junfeng Wang
College of Civil Engineering and Architecture, Hainan University, China;Research Center of Marine En Institute of Tropical Agriculture and Forestry, Hainan University, China;Research Center of Marine E
国际会议
福州
英文
594-604
2018-11-07（万方平台首次上网日期，不代表论文的发表时间）