期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Dynamic Compression Behavior of Ultra-high Performance Cement-based Composite with Hybrid Steel Fiber Reinforcements 被引量:1
1
作者 RONG Zhidan WANG Yali WU Shenping 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2020年第5期900-907,共8页
Ultra-high performance cement-based composites (UHPCC) is promising in construction of concrete structures that suffer impact and explosive loads.In this study,a reference UHPCC mixture with no fiber reinforcement and... Ultra-high performance cement-based composites (UHPCC) is promising in construction of concrete structures that suffer impact and explosive loads.In this study,a reference UHPCC mixture with no fiber reinforcement and four mixtures with a single type of fiber reinforcement or hybrid fiber reinforcements of straight smooth and end hook type of steel fibers were prepared.Split Hopkinson pressure bar (SHPB) was performed to investigate the dynamic compression behavior of UHPCC and X-CT test and 3D reconstruction technology were used to indicate the failure process of UHPCC under impact loading.Results show that UHPCC with 1% straight smooth fiber and 2% end hook fiber reinforcements demonstrated the best static and dynamic mechanical properties.When the hybrid steel fiber reinforcements are added in the concrete,it may need more impact energy to break the matrix and to pull out the fiber reinforcements,thus,the mixture with hybrid steel fiber reinforcements demonstrates excellent dynamic compressive performance. 展开更多
关键词 ultra-high performance cement-based composite dynamic compression behavior hybrid fiber reinforcements split Hopkinson pressure bar
下载PDF
Preparation of Self-compacting Ultra-high Toughness Cementitious Composite
2
作者 张秀芳 徐世烺 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2011年第4期754-761,共8页
A self-compacting ultra-high toughness cementitious composite (UHTCC) reinforced by discontinuous short polyvinyl alcohol (PVA) fibers, which exhibits self-compacting performance in the fresh state and strain-hard... A self-compacting ultra-high toughness cementitious composite (UHTCC) reinforced by discontinuous short polyvinyl alcohol (PVA) fibers, which exhibits self-compacting performance in the fresh state and strain-hardening and multiple cracking behavior in the hardened state, was developed through controlling flow properties of fresh mortar matrix at constant ingredients concentrations determined by micromechanical design and ensuring uniform fibers dispersion. The superplasticizer was utilized to adjust its flow properties in the fresh state. A series of flow tests, including deformability test, flow rate test, and self-placing test, were conducted to characterize and quantify the fluidity performance of fresh mortar matrix and self-compactability of fresh UHTCC. It is revealed that the utilization of superplasticizer is efficient in producing the fresh mortar matrix with desirable fluidity and the resulting self-compacting UHTCC. In addition, results of four point bending tests on the developed self-compacting UHTCC confirm the insensitivity of mechanical performance of self-compacting UHTCC to the presence of external vibrations as well as the flexural characteristics of deformation hardening and multiple cracking. 展开更多
关键词 SELF-COMPACTING ultra-high toughness cementitious composite (UHTCC) flow property STRAIN-HARDENING multiple cracking
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部