Mechanical Properties of Polyvinyl Alcohol Fiber-Reinforced Concrete Composite Containing Fly Ash and Nano-SiO2

2018 ◽  
Vol 10 (6) ◽  
pp. 769-778 ◽  
Author(s):  
Peng Zhang ◽  
Shidong Fu ◽  
Kaixuan Zhang ◽  
Tianhang Zhang
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Fly Ash ◽  
Polyvinyl Alcohol ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Nano Sio2 ◽  
Polyvinyl Alcohol Fiber

scholarly journals Experimental Study on Hybrid Effect Evaluation of Fiber Reinforced Concrete Subjected to Drop Weight Impacts

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2563 ◽  
Author(s):  
Jun Feng ◽  
Weiwei Sun ◽  
Hongzhou Zhai ◽  
Lei Wang ◽  
Haolin Dong ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Polyvinyl Alcohol ◽  
Impact Energy ◽  
Steel Fiber ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Hybrid Effect ◽  
Polyvinyl Alcohol Fiber ◽  
The Impact

In this paper, the impact energy potential of hybrid fiber reinforced concrete (HFRC) was explored with different fiber mixes manufactured for comparative analyses of hybridization. The uniaxial compression and 3-point bending tests were conducted to determine the compressive strength and flexural strength. The experimental results imply that the steel fiber outperforms the polypropylene fiber and polyvinyl alcohol fiber in improving compressive and flexural strength. The sequent repeated drop weight impact tests for each mixture concrete specimens were performed to study the effect of hybrid fiber reinforcement on the impact energy. It is suggested that the steel fiber incorporation goes moderately ahead of the polypropylene or polyvinyl alcohol fiber reinforcement in terms of the impact energy improvement. Moreover, the impact toughness of steel-polypropylene hybrid fiber reinforced concrete as well as steel-polyvinyl alcohol hybrid fiber reinforced concrete was studied to relate failure and first crack strength by best fitting. The impact toughness is significantly improved due to the positive hybrid effect of steel fiber and polymer fiber incorporated in concrete. Finally, the hybrid effect index is introduced to quantitatively evaluate the hybrid fiber reinforcement effect on the impact energy improvement. When steel fiber content exceeds polyvinyl alcohol fiber content, the corresponding impact energy is found to be simply sum of steel fiber reinforced concrete and polyvinyl alcohol fiber reinforced concrete.

Study of Crack Resistance Property of Polyvinyl Alcohol Fiber Reinforced Concrete

2011 ◽  
Vol 287-290 ◽  
pp. 178-182 ◽  
Author(s):  
Kai Tao Xiao ◽  
Jia Zheng Li ◽  
Hua Quan Yang
Keyword(s):  
Elastic Modulus ◽  
Reinforced Concrete ◽  
Polyvinyl Alcohol ◽  
Crack Resistance ◽  
Drying Shrinkage ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Polyvinyl Alcohol Fiber ◽  
Resistance Property ◽  
Pva Fiber

The strength, ultimate tensile value, compressive elastic modulus and drying shrinkage of polyvinyl alcohol fiber reinforced concrete were studied by tests, and its crack resistance property was also studied by plate method and temperature stress testing machine. The test results showed that PVA fiber could improve the tensile strength and ultimate tensile value of concrete, lower its compressive elastic modulus and drying shrinkage, restrain its early plastic shrinkage and drying shrinkage cracks, reduce its cracking temperature and improve the crack resistance property of concrete, moreover, the effect of long PVA fiber was better.

scholarly journals Mechanical Properties of Nano SiO2 and Carbon Fiber Reinforced Concrete after Exposure to High Temperatures

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3773 ◽  
Author(s):  
Linsong Wu ◽  
Zhenhui Lu ◽  
Chenglong Zhuang ◽  
Yu Chen ◽  
Ruihua Hu
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
High Temperature ◽  
Carbon Fiber ◽  
Fiber Reinforced Concrete ◽  
Experimental Result ◽  
Fiber Reinforced ◽  
Nano Sio2 ◽  
Residual Properties ◽  
Carbon Fiber Reinforced

This study presents the key mechanical and residual properties after high-temperature of different Nano SiO2 carbon fiber-reinforced concrete (NSCFRC) mixtures. A total of seven NSCFRC mixtures incorporating 0%–0.35% of carbon fiber by volume of concrete and 0%–2% Nano SiO2 by weight of the binder were studied. The key mechanical properties such as compressive strength, tensile strength, and flexural strength of NSCFRC with 0.25% carbon fiber and 1% NS were 6.8%, 20.3%, and 11.7% higher than PC (0% CFs, 0% NS), respectively. Scanning Electron Microscopy (SEM) shows that Nano SiO2 reduced the internal porosity and increased the compactness of the concrete matrix. Furthermore, the experimental result demonstrates that NSCFRC can improve the mechanical properties of concrete after high-temperature and equations were obtained to describe the evolution of residual properties at elevated temperatures. Results suggested that the effect of carbon fibers on the residual properties of concrete after high-temperature is less than steel fiber and polypropylene fiber. It was also indicated that adding appropriate Nano SiO2 to concrete is an effective means to improve the residual performance after high-temperature.

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