Repair of pre-damaged RC beams using hybrid fiber reinforced strain hardening cementitious composites

2021 ◽  
Vol 235 ◽  
pp. 112081
Author(s):  
Matheus Pimentel Tinoco ◽  
Flávio de Andrade Silva
Keyword(s):  
Strain Hardening ◽  
Cementitious Composites ◽  
Rc Beams ◽  
Fiber Reinforced ◽  
Hybrid Fiber

Study on the Mechanical Properties of High Performance Hybrid Fiber Reinforced Cementitious Composite (HFRCC) under Impact Loading

2014 ◽  
Vol 629-630 ◽  
pp. 79-84 ◽  
Author(s):  
Hui Xian Yang ◽  
Jing Li ◽  
Yan Sheng Huang
Keyword(s):  
Impact Loading ◽  
Material Properties ◽  
High Performance ◽  
Steel Fibers ◽  
Cementitious Composites ◽  
Peak Strain ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Dynamic Material Properties ◽  
Fiber Reinforced Cementitious Composites

The dynamic material properties of high performance hybrid fiber reinforced cementitious composites (HFRCC) with various volumetric fractions of steel and polyvinyl alcohol (PVA) fibers were studied by the Split Hopkinson Press Bar (SHPB) test. The results show that HFRCC with higher volumetric fraction of steel fibers are more sensitive to stain rate and the dynamic compressive strength increase more prominently with the strain rate increasing, but peak strain shows the opposite trend. The PVA fibers increase the ductility of HFRCC more effectively than steel fibers. Compared to PVA fiber reinforced cementitious composites (FRCC), HFRCC present better dynamic material properties under impact loading.

The Apparent Density, Tensile Properties and Drying Shrinkage of Ultra High Toughness Cementitious Composites

2011 ◽  
Vol 261-263 ◽  
pp. 223-227 ◽  
Author(s):  
Xiang Rong Cai ◽  
Bai Quan Fu ◽  
Shi Lang Xu
Keyword(s):  
Strain Hardening ◽  
Apparent Density ◽  
High Performance ◽  
Drying Shrinkage ◽  
Uniaxial Tensile ◽  
Cementitious Composites ◽  
Fiber Reinforced ◽  
High Toughness ◽  
High Performance Fiber ◽  
Pseudo Strain Hardening

A new class of high performance fiber reinforced cementitious composites called Ultra High Toughness Cementitious Composites (UHTCC) is developed in the last few years. It is a pseudo strain hardening material with maximum tensile strain capacity more than 3%, yet the fiber volume fraction no more than 2%. The multiple cracking patterns accompanying pseudo strain hardening behavior are obtained which implies high ductility, energy absorption capacity, and toughness. A remarkable characteristic distinguish it from conventional high performance fiber reinforced concrete is the maximum crack width of multiple cracks which is about 60µm under ultimate tensile load. Such micro-cracks are often small enough to prevent the intrusion of aggressive agents. From a durability point of view this composite can be considered as an effectively uncracked material. The performances of this new material, including the apparent density, the uniaxial tensile property, and the drying shrinkage performance, are experimental studied in this paper.

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