生态型RPC材料的动态力学性能

赖建中; 孙伟; 焦楚杰; 林玮; 金祖权

doi:10.13204/j.gyjz200412018

生态型RPC材料的动态力学性能

doi: 10.13204/j.gyjz200412018

1.
东南大学材料科学与工程系,南京,210096

基金项目:

国家自然科学基金资助项目(编号:59938170)

详细信息

作者简介:
赖建中,男,1978年3月出生,博士研究生

中图分类号: TU525
计量
- 文章访问数: 76
- HTML全文浏览量: 9
- PDF下载量: 71
- 被引次数: 1
出版历程
- 收稿日期: 2004-03-22
- 刊出日期: 2004-12-20

DYNAMIC MECHANICAL PROPERTIES OF ECOLOGICAL REACTIVE POWDER CONCRETE

1.
Department of Materials Science and Engineering,Southeast University Nanjing 210096

摘要

摘要: 以质量分数为50%～60%的超细工业废渣取代水泥,以普通黄砂取代磨细石英砂,制备了两个不同配比的生态型RPC材料,利用分离式Hopkinson压杆装置研究了应变速率、纤维掺量和基体组成对ECORPC各项动态力学性能及破坏形态的影响。结果显示,生态RPC材料具有应变率强化效应、峰值荷载及破坏应变随应变率的提高而增加。纤维增强的生态RPC材料的各项动态力学性能优于RPC基体,且在破坏过程中表现出极大的韧性和延性。多元超细工业废渣的复合效应优化了基体微观结构,增强了纤维与基体的界面粘结,促进了破坏形态从脆性向韧性的转化。
- 生态RPC /
- 超细工业废渣 /
- 钢纤维 /
- 动态力学性能 /
- 应变率
Abstract: Two types of ecological reactive powder concretes (ECO-RPC) were prepared by substitution of ultra-fine industrial was te for 50%～60% cement by weight and replacement of ground fine quartz sand with natural fine sand. Through Hopkinson bar experiment the effect of strain rate, s teel fiber volume fraction and matrix composition on the dynamic mechanical prop erties and fracture pattern of ECO-RPC were researched.The results showed that ECO-RPC has strain rate strengthen effect. Peak stress and strain at peak stres s increase with the increase of strain rate.The dynamic mechanical prope rties of fiber reinforced ECO-RPC are superior to those of ECO-RPC matrix and ECO-RPC with fiber shows great toughness and ductility during the course of fra cture.The composition effects of ultra-fine industrial waste give benefit for t he matrix micro-structure and strengthen the bond between fiber and matrix so a s to make fracture pattern change from brittleness to toughness.
- ecological reactive powder concrete /
- ultra-fine industrial waste /
- steel fiber /
- dynamic mechanical properties strain rate /