Deflection hardening behavior and elastic modulus of one-part hybrid fiber-reinforced geopolymer composites

2019 ◽  
Vol 5 (2) ◽  
pp. 37-51
Author(s):  
Yazan Alrefaei ◽  
Jian-Guo Dai
Keyword(s):  
Elastic Modulus ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Hardening Behavior ◽  
Geopolymer Composites

scholarly journals Experimental Research on Uniaxial Compression Constitutive Model of Hybrid Fiber-Reinforced Cementitious Composites

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2370
Author(s):  
Tao Cui ◽  
Haoxiang He ◽  
Weiming Yan
Keyword(s):  
Elastic Modulus ◽  
Constitutive Model ◽  
Peak Stress ◽  
Fiber Reinforced Concrete ◽  
Forward Peak ◽  
Peak Strain ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Stress Strain ◽  
Element Analysis

In order to establish accurate compressive constitutive model of Hybrid Fiber-Reinforced Concrete (HFRC), 10 groups of HFRC specimens containing polyvinyl alcohol (PVA), polypropylene (PP), and steel fibers are designed and compressive testing is conducted. On the basis of summarizing and comparing the existing research, accuracy of various stress-strain constitutive model is compared and the method of calculating fitting parameters is put forward, peak stress, peak strain, and elastic modulus of specimens with different fiber proportion are analyzed, the calculation expressions of each fitting parameter are given. The results show that, under the condition that the volume of the hybrid fiber is 2% with the proportion of the steel fiber increase, the strength of the specimen increases, the peak strain decreases slightly, and the elastic modulus increases significantly. In specimens mixed with PVA-PP hybrid fiber, with the increase of PVA fiber proportion, the peak stress and elastic modulus of the material are improved, and the peak strain are decreased. The existing stress-strain expressions agree well with the tests. Accuracy of exponential model proposed in this paper is the highest, which can be applied in engineering and nonlinear finite element analysis of components.

Sulfate resistance of hybrid fiber reinforced metakaolin geopolymer composites

2020 ◽  
Vol 183 ◽  
pp. 107689 ◽  
Author(s):  
Liang Guo ◽  
Yueyue Wu ◽  
Fang Xu ◽  
Xintong Song ◽  
Jiayuan Ye ◽  
...  
Keyword(s):  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Sulfate Resistance ◽  
Metakaolin Geopolymer ◽  
Geopolymer Composites

Investigation on Mode I Fracture Behavior of Hybrid Fiber-Reinforced Geopolymer Composites

2019 ◽  
Vol 44 (10) ◽  
pp. 8545-8555 ◽  
Author(s):  
Neha P. Asrani ◽  
G. Murali ◽  
Hakim S. Abdelgader ◽  
K. Parthiban ◽  
M. K. Haridharan ◽  
...  
Keyword(s):  
Fracture Behavior ◽  
Mode I ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Mode I Fracture ◽  
Geopolymer Composites

scholarly journals Study on Mechanical Properties and Constitutive Equation of Hybrid Fiber Reinforced Cementitious Composites Under Static Loading

2016 ◽  
Vol 10 (1) ◽  
pp. 482-491 ◽  
Author(s):  
Huixian Yang ◽  
Jing Li ◽  
Yansheng Huang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Steel Fiber ◽  
Cementitious Composites ◽  
Peak Strain ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Stress Strain ◽  
Fiber Reinforced Cementitious Composites

The Quasi-static mechanical properties of hybrid fiber (steel fiber and Polyvinyl alcohol (PVA) fiber) reinforced cementitious composites (HFRCC(SP)) were investigated by compressive and tensile experiments. The compressive strength, peak strain, elastic modulus and tensile strength are studied as compared with that of engineered cementitious composite (ECC). Study results indicate that steel fibers can improve the compressive and tensile strength of HFRCC(SP) but the peak strain of HFRCC(SP) decreases. The formulas modified based on codes are proposed to calculate compressive peak strain, elastic modulus and tensile strength. The relationship between tensile strain at peak load and tensile strength of HFRCC with different volume fractions of polyethylene fiber and steel fiber were studied and the tensile stress-strain relation was presented. The parameters k1 and k2 of constitutive formulas for fiber reinforced high strength concrete presented by Mansur are modified to describe the stress-strain curve of HFRCC(SP), the modified formulas show good agreement with the experimental results.

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