Experimental Study on Flexural Strength of Polyvinyl Alcohol (PVA) Fiber Reinforced Cementitious Composites

2010 ◽  
Vol 150-151 ◽  
pp. 1013-1016 ◽  
Author(s):  
Shu Guang Liu ◽  
Cun He ◽  
Chang Wang Yan ◽  
Hai Jun Jiang
Keyword(s):  
Fly Ash ◽  
Flexural Strength ◽  
Polyvinyl Alcohol ◽  
Silica Fume ◽  
Volume Fraction ◽  
Cementitious Composites ◽  
Research Findings ◽  
Substitution Ratio ◽  
Pva Fiber ◽  
Fiber Reinforced Cementitious Composites

Flexural strength of cementitious composites containing polyvinyl alcohol (PVA) fiber, fly ash (FA) and silica fume (SF) is studied in this paper. The parameters studied include volume fraction of fiber, the substitution ratio of cement by fly ash and the substitution ratio of cement by both silica fume and fly ash, which have an influence on the compressive strength and flexural strength of cementitious composites. The research findings show that with the increase of volume fraction of fiber, the flexural strength of cementitious composites are improved .When the volume fraction of fiber rises from 0 to 2% ,the flexural strength increases by 51.8%. When the volume fraction of fiber remains 2%, cement substitution with fly ash reduces the flexural strength of cementitious Composites, while which is improved by cement substitution with both silica fume and fly ash.

Water Permeability of Polyvinyl Alcohol (PVA) Fiber Reinforced Cementitious Composites

2010 ◽  
Vol 150-151 ◽  
pp. 1009-1012
Author(s):  
Shu Guang Liu ◽  
Cun He ◽  
Chang Wang Yan ◽  
Xiao Ming Zhao
Keyword(s):  
Fly Ash ◽  
Polyvinyl Alcohol ◽  
Penetration Depth ◽  
Silica Fume ◽  
Water Permeability ◽  
Volume Fraction ◽  
Cementitious Composites ◽  
Research Findings ◽  
Pva Fiber ◽  
Fiber Reinforced Cementitious Composites

The water permeability of cementitious composites containing polyvinyl alcohol (PVA) fiber, fly ash (FA) and silica fume (SF) is studied in this paper. The parameters studied include volume fraction of PVA fiber, cement substitution with fly ash and cement substitution with both silica fume and fly ash. The research findings show that with the increase of volume fraction of PVA fiber, the penetration depth of cementitious composites is decreased. The penetration depth increases with the addition of FA and SF. Conclusions were drew that PVA fiber, FA and SF have an obvious influence on the water permeability.

Experimental Study on Early Anti-Cracking Properties of Polyvinyl Alcohol Fiber Reinforced Cementitious Composites

2010 ◽  
Vol 34-35 ◽  
pp. 1445-1448 ◽  
Author(s):  
Shu Guang Liu ◽  
Cun He ◽  
Chang Wang Yan ◽  
Xiao Ming Zhao
Keyword(s):  
Polyvinyl Alcohol ◽  
Crack Width ◽  
Fiber Volume Fraction ◽  
Volume Fraction ◽  
Cementitious Composites ◽  
Fiber Volume ◽  
Polyvinyl Alcohol Fiber ◽  
Maximum Crack ◽  
Pva Fiber ◽  
Fiber Reinforced Cementitious Composites

This paper mainly studies early anti-cracking of cementitious composites containing polyvinyl alcohol (PVA) fiber and fly ash (FA). The PVA fibers were added at the volume fractions of 0%, 0.25%, 0.5%, 1.0% and 2.0%. The percentages of FA used in the experiment were 0% and 15%. Experimental results show that the maximum crack width and total crack area can be reduced with the increase of volume fraction of PVA fiber, and that no crack appeared at the volume fraction of 2.0%. The reducing tendency of crack width and total crack area kept constant with addition of FA, but reducing amplitude decreased. When the PVA fiber volume fraction remains constant, the early anti-cracking properties of cementitious composites containing PVA fiber and common cement are superior to one containing PVA fiber and FA. Conclusions can be drawn that the early anti-cracking properties of cementitious composites can be improved by PVA fiber.

scholarly journals Influence of polyvinyl alcohol fiber and fly ash content on compressive creep properties of high ductility cementitious composites

2021 ◽  
Vol 272 ◽  
pp. 02014
Author(s):  
Bo Chen ◽  
Liping Guo ◽  
Lihui Zhang ◽  
Wenxiao Zhang ◽  
Yin Bai ◽  
...  
Keyword(s):  
Fly Ash ◽  
Polyvinyl Alcohol ◽  
Fiber Volume Fraction ◽  
Volume Fraction ◽  
Ash Content ◽  
Creep Model ◽  
High Ductility ◽  
Fiber Volume ◽  
Leading Role ◽  
Pva Fiber

The influence of polyvinyl alcohol (PVA) fiber volume fraction and fly ash content on the creep behavior of high ductility cementitious composites (HDCC) under compression was investigated. For this investigation, the creep behavior of four HDCC groups with cube compressive strength of 30–50 MPa, PVA fiber volume fraction of 1.5% and 2.0%, and fly ash content of 60% and 80% at 7 d and 28 d loading periods, respectively, were evaluated. A compressive creep model, which reflects the loading age and holding time, was established. The results revealed that when the load was applied at 7 d and 28 d, and then maintained for 245 d, the specific creep of HDCC ranged from 95×10-6/ MPa to 165×10-6/ MPa and from 59×10-6/ MPa to 135 × 10−6/ MPa, respectively. The corresponding creep coefficients ranged from 1.48 to 2.25 and from 1.10 to 1.94, respectively. The PVA fiber volume fraction and fly ash content were the main factors affecting the specific creep of HDCC, which increased with increasing fiber fraction and fly ash content. Under short-term loading, the fiber volume fraction played a leading role in the specific creep, and the fly ash content played the leading role during long-term loading. Furthermore, the specific creep and creep coefficient decreased significantly with increasing loading age. The classical creep model described by a power exponent function is suitable for HDCC.

Study on the Preparation of Green and Environmentally Friendly High Toughness Cementitous Composites with Large Amount of Fly Ash

2020 ◽  
Vol 996 ◽  
pp. 97-103
Author(s):  
Xiang Rong Cai ◽  
Bai Quan Fu ◽  
Zhi Gang Liu
Keyword(s):  
Fly Ash ◽  
Flexural Strength ◽  
Strain Hardening ◽  
Cementitious Composites ◽  
Special Focus ◽  
Type I ◽  
Flexural Performance ◽  
High Toughness ◽  
Four Point Bending ◽  
Pva Fiber

In order to reduce the environmental burden and the energy consumption of PVA fiber reinforced high toughness cementitious composites, special focus is placed on the influence of fly ash type and content and curing type on the flexural performance of high toughness cementitious composites through four-point bending tests. The high toughness cementitious composites without fly ash have been used in the program for comparison purpose. The tests results show that, compared with the basic high toughness cementitious composites, the flexural strength decreases and the deflection increases with the s/b increasing when the fly ash is added. The increase in fly ash content results in an improvement of strain hardening property and increases in both flexural strength and deflection, which show that fly ash is benefit to the pseudo strain hardening performance. However the effects of fly ash type and curing type are not obvious on the load but obvious on the deflection. The deflection of high toughness cementitious composites with type I fly ash or water curing is higher than that of type II or standard curing. It is demonstrated that all the high toughness cementitious composites studied in this paper exhibit strain-hardening and multiple cracking through adding fly ash.

Properties of Steel Fiber Reinforced Geopolymer

2015 ◽  
Vol 659 ◽  
pp. 143-148 ◽  
Author(s):  
Rachamongkon Wongruk ◽  
Smith Songpiriyakij ◽  
Piti Sukontasukkul ◽  
Prinya Chindaprasirt
Keyword(s):  
Fly Ash ◽  
Flexural Strength ◽  
Silica Fume ◽  
Steel Fibre ◽  
Steel Fiber ◽  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Steel Fibers ◽  
Flexural Performance

In this study, the mechanical properties of steel fibre reinforced geopolymer (SFRG) are investigated. The geopolymer is consisted of fly ash, silica fume and activator solution, sodium silicate and sodium hydroxide. Five mix proportions of fly ash and silica fume are varied to study the effect of fly ash/silica fume ratios (FA/SF). This experimental series focus mainly on flexural strength and flexural toughness performance of SFRG. Hooked-ends steel fibers are used at 0.5% and 1% by volume fractions. The experiment is carried out based on ASTM C1609 (beam specimens) for flexural performance. The results showed that fibre can significantly enhance the both flexural strength and toughness of geopolymer. The enhancement also increases with the increasing fibre volume fraction.

Effect of polypropylene fibre on flexural properties of concrete composites containing fly ash and silica fume

2012 ◽  
Vol 226 (2) ◽  
pp. 177-181 ◽  
Author(s):  
P Zhang ◽  
Q Li ◽  
Z Sun
Keyword(s):  
Fly Ash ◽  
Flexural Strength ◽  
Silica Fume ◽  
Modulus Of Elasticity ◽  
Volume Fraction ◽  
Flexural Modulus ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Polypropylene Fibre ◽  
Flexural Properties

The application of fly ash and silica fume in concrete composites by blending synchronously can improve the mechanical properties of concrete composites. However, the concrete composite becomes much brittle with the usage of fly ash and silica fume. Polypropylene fibre is often used to improve the ductility of concrete composites. This article discusses the effect of polypropylene fibre on the flexural properties of concrete composites containing fly ash and silica fume. Results reveal that the addition of polypropylene fibre can increase the flexural strength and decrease the flexural modulus of elasticity of the concrete composite containing fly ash and silica fume evidently. Furthermore, it is indicated that an increase in the fibre volume fraction leads to an increase in the flexural strength and a decrease in the flexural modulus of elasticity when the fibre volume fraction is not beyond 0.12 per cent. Polypropylene fibre seems to play an important role to improve the ductility of concrete composites containing fly ash and silica fume.

scholarly journals Effect of SIFRCCs with Varying Steel Fiber Volume Fractions on Flexural Behavior

2020 ◽  
Vol 10 (6) ◽  
pp. 2072
Author(s):  
Seungwon Kim ◽  
Cheolwoo Park ◽  
Yongjae Kim
Keyword(s):  
Flexural Strength ◽  
Fiber Volume Fraction ◽  
Volume Fraction ◽  
Flexural Behavior ◽  
Cementitious Composites ◽  
Fiber Reinforced ◽  
Fiber Volume ◽  
Conventional Concrete ◽  
Volume Fractions ◽  
Fiber Reinforced Cementitious Composites

Conventional concrete is a brittle material with a very low tensile strength as a result of compressive strength and tensile strain. In this study, the flexural behavior characteristics of slurry-infiltrated fiber-reinforced cementitious composites (SIFRCCs) based on slurry-infiltrated fiber concrete (SIFCON), such as high-performance fiber-reinforced cementitious composites (HPFRCCs), were analyzed to maximize the fiber volume fraction and increase resistance to loads with very short working times (such as explosions or impacts). For extensive experimental variables, one fiber aspect ratio and three fiber volume fractions (6%, 5%, and 4%) were designed, and the flexural toughness and strength were figured out with respect to variables. A maximum flexural strength of 45 MPa was presented for a fiber volume fraction of 6%, and it was found that by increasing the fiber volume fraction the flexural strength and toughness increased. The test results with respect to fiber volume fraction revealed that after the initial crack, the load of SIFRCCs frequently increased because of the high fiber volume fraction. In addition to maximum strength, acceptable strength was found, which could have a positive effect on brittle fractures in structures where an accidental load is applied (such as an impact or explosion).

scholarly journals Cement-Based Materials Containing Graphene Oxide and Polyvinyl Alcohol Fiber: Mechanical Properties, Durability, and Microstructure

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 638 ◽  
Author(s):  
Wenguang Jiang ◽  
Xiangguo Li ◽  
Yang Lv ◽  
Mingkai Zhou ◽  
Zhuolin Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Flexural Strength ◽  
Polyvinyl Alcohol ◽  
Mechanical Strength ◽  
Mechanical Performance ◽  
Control Sample ◽  
Corrosion Condition ◽  
Cement Based Materials ◽  
Strength And Durability ◽  
Pva Fiber

The influence of graphene oxide (GO) and polyvinyl alcohol (PVA) fiber on the mechanical performance, durability, and microstructure of cement-based materials was investigated in this study. The results revealed that compared with a control sample, the mechanical strength and durability of cement-based materials were significantly improved by adding PVA fiber and GO. The compressive and flexural strength at 28 d were increased by 30.2% and 39.3%, respectively. The chloride migration coefficient at 28 d was reduced from 7.3 × 10−12 m2/s to 4.3 × 10−12 m2/s. Under a sulfate corrosion condition for 135 d, the compressive and flexural strength still showed a 13.9% and 12.3% gain, respectively. Furthermore, from the Mercury Intrusion Porosimetry (MIP) test, with the incorporation of GO, the cumulative porosity decreased from more than 0.13 cm3/g to about 0.03 cm3/g, and the proportion of large capillary pores reduced from around 80% to 30% and that of medium capillary pores increased from approximately 20% to 50%. Scanning electron microscope (SEM) images showed a significant amount of hydration products adhering to the surface of PVA fiber in the GO and PVA fiber modified sample. The addition of GO coupling with PVA fiber in cement-based materials could promote hydration of cement, refine the microstructure, and significantly improve mechanical strength and durability.

scholarly journals Effect of different PVA and steel fiber length and content on mechanical properties of CaCO3 whisker reinforced cementitious composites

2019 ◽  
Vol 69 (336) ◽  
pp. 200 ◽  
Author(s):  
M. Cao ◽  
C. Xie ◽  
L. Li ◽  
M. Khan
Keyword(s):  
Mechanical Properties ◽  
Crack Resistance ◽  
Fiber Length ◽  
Large Deflection ◽  
Steel Fiber ◽  
Flexural Behavior ◽  
Cementitious Composites ◽  
Hybrid Fiber ◽  
Pva Fiber ◽  
Fiber Reinforced Cementitious Composites

In this paper, calcium carbonate (CaCO3) whisker as a fiber reinforcement is mixed with steel and PVA fiber to form a multiscale hybrid fiber reinforced cementitious composites (MHFRCC). ASTM standard and post-crack strength techniques are performed to evaluate the mechanical properties of MHFRCC. The 1.25 % long steel fiber, 0.55 % short PVA fiber and 2.0 % CaCO3 whisker specimens showed the best flexural behavior before L/600 deflection. However, 1.5 % long steel fiber, 0.4 % long PVA fiber and 1.0 % CaCO3 whisker specimens presented better crack resistance after L/600 deflection. It is revealed that flexural parameters increase as comprehensive reinforcing index increase. The result showed that the CaCO3 whisker and short PVA fiber provided crack resistance effect at micro-scale and mainly play a dominate role in inhibiting micro-cracking. However, long steel fiber and long PVA fiber showed a better bridging effect of macro cracks at a large deflection.

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