Anlysis on Freeze-Thaw Cycling Damage of Layered Hybrid Fiber Reinforced Concrete

2012 ◽  
Vol 226-228 ◽  
pp. 1743-1746
Author(s):  
Dong Qing He ◽  
Bo Liu
Keyword(s):  
Reinforced Concrete ◽  
Damage Model ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Damage Propagation ◽  
Freeze Thaw ◽  
Damage Process

Based on the least squares theory and a damage variable , a damage model is formed for the freeze-thaw degradation of the layered hybrid fiber reinforced concrete (LHFRC). By the model the degradation equations for the LHFRC and the plain concrete(PC) are regressed with the experimental data, which are identical in the initial phase and different in the damage propagation phase and the is used to describe the damage process of concrete subjected to freeze-thaw cycles. The of LHFRC is smaller than that of PC in the damage propagation phase. Furthermore, the frost resistance of LHFRC is stronger than that of PC due to steel fibers and polypropylene fibers having retarded the degradation of concrete.

scholarly journals Blast-Resistant Performance of Hybrid Fiber-Reinforced Concrete (HFRC) Panels Subjected to Contact Detonation

2019 ◽  
Vol 10 (1) ◽  
pp. 241
Author(s):  
Wenjin Yao ◽  
Weiwei Sun ◽  
Ze Shi ◽  
Bingcheng Chen ◽  
Le Chen ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Blast Resistance ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Hybrid Fiber ◽  
Hybrid Effect ◽  
Pva Fiber ◽  
Resistance Performance

This paper experimentally investigates the blast-resistant characteristics of hybrid fiber-reinforced concrete (HFRC) panels by contact detonation tests. The control specimen of plain concrete, polypropylene (PP), polyvinyl alcohol (PVA) and steel fiber-reinforced concrete were prepared and tested for characterization in contrast with PP-Steel HFRC and PVA-Steel HFRC. The sequent contact detonation tests were conducted with panel damage recorded and measured. Damaged HFRC panels were further comparatively analyzed whereby the blast-resistance performance was quantitively assessed via damage coefficient and blast-resistant coefficient. For both PP-Steel and PVA-Steel HFRC, the best blast-resistant performance was achieved at around 1.5% steel + 0.5% PP-fiber hybrid. Finally, the fiber-hybrid effect index was introduced to evaluate the hybrid effect on the explosion-resistance performance of HFRC panels. It revealed that neither PP-fiber or PVA-fiber provide positive hybrid effect on blast-resistant improvement of HFRC panels.

scholarly journals Experimental Study on Durability of Hybrid Fiber-Reinforced Concrete in Deep Alluvium Frozen Shaft Lining

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 725
Author(s):  
Zhishu Yao ◽  
Yu Fang ◽  
Ping Zhang ◽  
Xianwen Huang
Keyword(s):  
Corrosion Resistance ◽  
Reinforced Concrete ◽  
Reference Group ◽  
Fiber Reinforced Concrete ◽  
Test Results ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Freeze Thaw ◽  
Thaw Cycle ◽  
Shaft Lining

This article proposes hybrid fiber-reinforced concrete (HFRC) mixed with polyvinyl alcohol fiber (PVA) and polypropylene steel fiber (FST) as a wall construction material to improve the bearing capacity and durability of frozen shaft lining structures in deep alluvium. According to the stress characteristics and engineering environment of the frozen shaft lining, the strength, impermeability, freeze–thaw damage, and corrosion resistance are taken as the evaluation and control indexes. The C60 concrete commonly used in freezing shaft lining is selected as the reference group. Compared to the reference group, the test results show that the compressive strength of HFRC is similar to that of the reference concrete, but its splitting tensile strength and flexural strength are higher; according to the strength test, the optimum mixed content of 1.092 kg/m3 PVA and 5 kg/m3 FST are obtained. According to the impermeability test results, the mixing of PVA and FST can improve the impermeability resistance of concrete. For the freeze–thaw cycle test results, the mixing of PVA and FST can improve the frost resistance of concrete; based on the 120 days sulfate corrosion test, the mixing of PVA and FST will improve the corrosion resistance of concrete.

Synergistic Effects and Cracking Bending Strength for Steel-Polypropylene Hybrid Fiber Reinforced Concrete

2013 ◽  
Vol 652-654 ◽  
pp. 1237-1241
Author(s):  
Guo Dong Mei ◽  
Xiao Fan Liu ◽  
Ji Xiang Li ◽  
Wen Fu Duan
Keyword(s):  
Reinforced Concrete ◽  
Synergistic Effect ◽  
Bending Strength ◽  
Steel Fiber ◽  
Synergistic Effects ◽  
Polypropylene Fiber ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Hybrid Fiber

The cracking bending strength for steel-polypropylene hybrid fiber reinforced concrete (HFRC) had been studied based on experimental test. the inicial cracking strength achieve significant improvement compare to plain concrete, and the highest increase is 16.7%. There is a synergistic effect exist when steel fiber is 1.0% in volume or polypropylene fiber is 0.1% in volume, and the synergistic effect raise to vertex (1.043) when both of those two requirements are fulfilled.

Experimental Study on Fiber Reinforced Concrete

2008 ◽  
Vol 400-402 ◽  
pp. 391-394
Author(s):  
Ming Hui Wei ◽  
Yi Ping Liu ◽  
Li Qun Tang ◽  
Xiao Qing Huang
Keyword(s):  
Reinforced Concrete ◽  
Cost Estimation ◽  
Steel Fiber ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Polymer Fiber ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Hybrid Fiber ◽  
Polymer Modified Concrete

Flexure behaviors of plain concrete (PC), steel fiber reinforced concrete (SFRC), polymer modified concrete (PMC), steel fiber reinforced and polymer modified concrete (SFRPMC) and hybrid fiber reinforced concrete (HFRC) with steel fiber and polymer fiber are studied in this paper, flexure tests were carried out and flexure strengths of the five different materials with different mixture ratios were measured and compared. Flexure ductility of PC, PMC, SFRC, and SFRPMC were calculated and compared. In addition, considering performance and cost estimation comprehensively, HFRC is recommended, preliminary tests show that HFRC may be one of the potential materials for bridge pavement.

Freeze/Thaw Durability of Carbon Fiber Reinforced Concrete

2012 ◽  
Vol 174-177 ◽  
pp. 816-820
Author(s):  
Xin Yuan ◽  
Guo Hua Zhu ◽  
Liang Yu
Keyword(s):  
Elastic Modulus ◽  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Paired Comparison ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Freeze Thaw ◽  
Increasing Trend ◽  
Carbon Fiber Reinforced

An increasing trend towards the demand for resisting to Freeze/thaw exposure has led to fibers being incorporated into concrete. This paper addresses the freeze/thaw durability of carbon fiber reinforced concrete by using a paired comparison test based upon relative dynamic elastic modulus and the rate of loss mass. The carbon fiber reinforced concrete was found to be more durable than plain concrete probably due to the high elastic modulus of carbon fiber. Durability is an important material property and carbon fiber reinforced concrete needs to be widely tested to gain confidence for use within the industry and this work shows future possibilities.

Study on Flexural Fatigue Performance and Damage Laws of Hybrid Fiber Reinforced Concrete

2010 ◽  
Vol 129-131 ◽  
pp. 1138-1141
Author(s):  
Meng Chen ◽  
Zhe An Lu ◽  
Zhi Gang Ren ◽  
You Zou
Keyword(s):  
Reinforced Concrete ◽  
Plain Concrete ◽  
Single Step ◽  
Fiber Reinforced Concrete ◽  
Fatigue Performance ◽  
Fatigue Properties ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Flexural Fatigue ◽  
Fatigue Experiment

The flexural fatigue experiment of plain concrete (C) and Steel - Polypropylene Hybrid Fiber Reinforced Concrete (HFRC) is carried out to study the flexural fatigue performance and damage laws under cyclic loading. With the strain gauges pasted on the bottom of the specimens, the strain is collected by dynamic acquisition instrument.We obtain the fatigue life and the maximum strain - cyclic ratio ( ) curves by counting and analyzing the results of fatigue experiment ,which move forward a single step for analysis of fatigue damage laws of HFRC. The study would provide reference for flexural fatigue properties of HFRC.

scholarly journals On the mechanical response of Hybrid Fiber Reinforced Concrete with Recycled and Industrial Steel Fibers

2017 ◽  
Vol 147 ◽  
pp. 286-295 ◽  
Author(s):  
Antonio Caggiano ◽  
Paula Folino ◽  
Carmine Lima ◽  
Enzo Martinelli ◽  
Marco Pepe
Keyword(s):  
Reinforced Concrete ◽  
Mechanical Response ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
Fiber Reinforced ◽  
Hybrid Fiber

Experimental Research on the Freeze-Thaw Resistance of Basalt Fiber Reinforced Concrete

2014 ◽  
Vol 919-921 ◽  
pp. 1912-1915 ◽  
Author(s):  
Xiao Chun Fan ◽  
Di Wu ◽  
Hu Chen
Keyword(s):  
Elastic Modulus ◽  
Reinforced Concrete ◽  
Fly Ash ◽  
Mass Loss ◽  
Basalt Fiber ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Engineering Applications ◽  
Freeze Thaw

Basalt fiber reinforced concrete has excellent basic mechanical properties. It has become a hot topic of engineering studies. Based on the freeze-thaw resistance of durability indices, through the comparative experiment on the dynamic elastic modulus and mass loss of plain concrete and basalt fiber reinforced concrete in the freeze-thaw cycles, this paper had discussed the impact of basalt fiber on the freeze-thaw resistance of concrete, and have considered whether the specimens were mixed with fly ash. The results showed that basalt fibers can improve the freeze-thaw resistance of concrete specimens significantly. After 100 freeze-thaw cycles, the dynamic elastic modulus of basalt fiber reinforced concrete specimens was 1.47 times as much as that of plain concrete specimens, and mass loss of basalt fiber reinforced concrete specimens was 0.64 times as much as that of plain concrete specimens. Fly ash had an influence on the freeze-thaw resistance of basalt fiber reinforced concrete. In engineering applications, the mixing amount of fly ash should be taken into consideration. This research had a certain reference value on the engineering applications of basalt fiber reinforced concrete.

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