Main properties of ultra-high performance fiber reinforced cement composites under couple effect of load and environment

作     者：Saly Fathy 顾春平 孙伟 Saly Fathy;Gu Chunping;Sun Wei

作者机构：东南大学材料科学与工程学院南京211189 Department of Civil EngineeringAlexandria UniversityAlexandria 21532Egypt 

基　　金：The Technical Research Program from NV Bekaert SA of Belgium (No. 8612000003) the National Natural Science Foundation of China (No. 50908047) 

出 版 物：《Journal of Southeast University(English Edition)》 (东南大学学报（英文版）)

年 卷 期：2012年第28卷第2期

页      码：184-189页

摘      要：This study aims to reveal the mechanism that how the content of steel fibers and strength grades affect the macro performance of the ultra-high performance fiber reinforced cementitious composite （UHPFRCC） and to study the UHPFRCC durability under the combined effect of loads and environments. Three types of high and ultra-high performance fiber reinforced cement composites with different strength grades （100, 150, 200 MPa） and different steel fiber volume fractions （0%, 1%, 2%, 3%） are prepared. The main properties of mechanical performance and short-term durability are studied. A preloading frame is designed to apply a four- point load external flexural stress with a stress selection ratio of 0.5 for UHPFRCC150 specimens. The results show that the growth in strength grade with a proper content of steel fiber greatly increases the strength and toughness of the HPFRCC and the UHPFRCC while decreasing the dry-shrinkage ratio. For the loaded specimens, the existence of steel fiber can reduce the negative influence of tensile stress on the Cl- penetration resistance of the UHPFRCC in addition to improving its ability to resist the freeze-thaw damage.

主 题 词：ultra-high performance fiber reinforced cementitious composite couple effect of load and environment mechanical properties durability 

学科分类：08[工学] 081304[081304] 0805[工学-能源动力学] 080502[080502] 0813[工学-化工与制药类] 

核心收录：

D　O　I：10.3969/j.issn.1003-7985.2012.02.010

馆 藏 号：203740365...