[1] Lai Jianzhong, Sun Wei, Lin Wei, Jin Zuquan, et al. Static and dynamic mechanical behaviour of ECO-RPC [J]. Journal of Southeast University (English Edition), 2005, 21 (2): 197-202. [doi:10.3969/j.issn.1003-7985.2005.02.016]
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Static and dynamic mechanical behaviour of ECO-RPC(
)
生态型RPC材料在静态和动态荷载下的力学行为研究
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 21
- Issue:
- 2005 2
- Page:
- 197-202
- Research Field:
- Materials Sciences and Engineering
- Publishing date:
- 2005-06-30
Info
- Title:
- Static and dynamic mechanical behaviour of ECO-RPC
- 生态型RPC材料在静态和动态荷载下的力学行为研究
- Author(s):
- Lai Jianzhong; Sun Wei; Lin Wei; Jin Zuquan
- Department of Materials Science and Engineering, Southeast University, Nanjing 210096, China
- Keywords:
- ecological reactive powder concrete(ECO-RPC); industrial waste powder; interfacial bond strength; fracture energy; static and dynamic mechanical behaviour; high strain rate
- PACS:
- TU52
- DOI:
- 10.3969/j.issn.1003-7985.2005.02.016
- Abstract:
- Ecological reactive powder concrete(ECO-RPC)with small sized and different volume fraction steel fibers was prepared by substitution of ultra-fine industrial waste powder for 50% to 60% cement by weight and replacement of ground fine quartz sand with natural fine aggregate.The effect of steel fiber volume fraction and curing ages on the static mechanical behaviour of ECO-RPC was studied.Using the split Hopkinson pressure bar technique, the dynamic mechanical behaviour of ECO-RPC was investigated under different strain rates.The results show that the static mechanical behaviour of ECO-RPC increases with the increase of steel fiber volume fraction and curing ages.The type of ECO-RPC with the substitution of 25% ultra-fine slag, 25% ultra-fine fly ash and 10% silica fume is better than the others with compressive strength, flexural strength, and fracture energy more than 200 MPa, 60 MPa and 30 kJ/m2, respectively.ECO-RPC has excellent strain rate stiffening effects under dynamic load.Its peak stress, peak strain and the area under strain-stress curve increase with the increase of strain rate.Its fracture pattern changes from brittleness to toughness under high strain rates.
- 以50%~60%的超细工业废渣取代水泥, 用天然黄砂取代磨细石英砂, 采用超细工业废渣多元复合技术, 制备出生态型活性粉末混凝土(ECO-RPC).研究了不同纤维掺量和不同养护龄期对ECO-RPC静态力学性能的影响.采用霍普金森杆方法研究了高速冲击下应变速率对ECO-RPC动态力学性能的影响.结果表明, 随着纤维掺量和养护龄期的增加, ECO-RPC各项静态力学性能不断提高.通过超细粉煤灰(25%)、超细矿粉(25%)和硅灰(10%)三掺制备的ECO-RPC性能最佳, 其抗压强度、抗折强度和断裂能分别达到200 MPa, 60 MPa 和 30 kJ/m2以上.ECO-RPC具有明显的应变率强化效应, 随着应变率的提高, 峰值应力及峰值应变显著增长, 应力-应变曲线所包围的面积不断增大, 破坏特征从脆性转变为韧性.
References:
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Memo
- Memo:
- Biographies: Lai Jianzhong(1978—), male, graduate;Sun Wei(corresponding author), female, professor, sunwei@seu.edu.cn.