Influence of a hybrid combination of steel and polypropylene fibers on concrete toughness

Guo, Hui; Jiang, Linzhi; Tao, Junlin; Chen, Yu; Zheng, Zhiqin; Jia, Baohua

doi:10.1016/j.conbuildmat.2020.122132

Cited by 41 publications

(9 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…e area enclosed by the stress-strain curve of each test block is calculated by integrating the stress-strain curve of each test block, and this area is the corresponding bending toughness of the test block [26]. In this paper, the area enclosed by the PC block curve is taken as the unit area, and the ratio of the toughness of each fiber concrete block to PC is the toughness ratio R x .…”

Section: Calculation Of Flexural Toughness Ratiomentioning

confidence: 99%

Study on Mechanical Properties and Optimum Fiber Content for Basalt/Polyacrylonitrile Hybrid Fiber Reinforced Concrete

Zeng

Chen

et al. 2022

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

In order to obtain the design method of hybrid fiber reinforced concrete with better mechanical properties, the hybrid effect of fiber and the optimal fiber dosage are studied. In this paper, basalt fiber (B fiber) and polyacrylonitrile fiber (P fiber) were adopted. The mechanical properties such as compressive strength, splitting tensile strength, and bending toughness of concrete specimens with different fiber volumes were tested. The compressive strength, compressive modulus of elasticity, tensile strength, flexural capacity, and bending stress-strain curves of concrete with different fiber volumes were obtained, and the coefficient of hybrid effect and the ratio of toughness were calculated accordingly. The results show that the addition of fiber has little effect on the compressive modulus of elasticity of concrete, and the tensile strength, flexural strength, and toughness ratio are significantly increased, but the compressive strength is slightly decreased. The mechanical properties of hybrid fiber reinforced concrete, such as compressive strength, tensile strength, flexural strength, and toughness ratio, are better than those of single fiber reinforced concrete. The analysis of the fiber hybrid effect coefficient shows that there is a good hybrid effect between the two types of fibers. When the volume contents of B fiber and P fiber are, respectively, 0.15% and 0.11%, the comprehensive mechanical property of fiber reinforced concrete is the best. Meanwhile, the mechanical properties of the early-age concrete (3 d and 7 d) with this admixture are better than those of the plain concrete.

show abstract

Section: Calculation Of Flexural Toughness Ratiomentioning

confidence: 99%

Study on Mechanical Properties and Optimum Fiber Content for Basalt/Polyacrylonitrile Hybrid Fiber Reinforced Concrete

Zeng

Chen

et al. 2022

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…Fracture toughness is the ability to characterize the ability of a material to stop crack extension, and the fracture toughness properties of concrete have been investigated using threepoint loading tests on notched beams [47][48][49]. Concrete compressive toughness is an important indicator for analyzing the energy dissipation capacity of a material and is related to the area under the uniaxial compressive stressstrain curve of concrete [50].…”

Section: Compressive Toughness and The Ideal Stiffnessmentioning

confidence: 99%

Compressive Toughness Loss Rate and Softening Characteristic Analysis of Pasture Fiber-Rubber Powder Concrete

Wang

Yang

2022

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

To develop the utilization of pasture fibers and waste tire rubber powder, the effect of different blending levels of modified pasture fibers (2 kg/m3, 3 kg/m3, and 4 kg/m3) on the loss rate of compressive toughness and softening characteristics of rubber powder concrete was studied. In addition, RapidAir457 system imaging analysis and microscopic electron microscope photo analysis were carried out to analyze the distribution pattern of modified pasture fibers and rubber powder in concrete. The results show that the peak load of concrete is higher than other pasture fiber dosing test groups when 3 kg/m3 is incorporated in 20 mesh and 60 mesh rubber powder. With the increase of pasture fiber content, the compressive toughness loss of MC60 group and MC80 group increased first and then decreased. The softening curve analysis showed that MC-3 was more capable of absorbing damage energy in the strain range of 0.0005–0.0009 than the MC-2 group. According to the RapidAir457 system imaging analysis, the pasture fibers form a web-like organization inside the concrete when the pasture fiber is mixed at 3 kg/m3.

show abstract

“…e PPF is separated from the cement before the ultimate stress is reached due to the weak bending between cement and fibre. As a result, it is not easy to achieve the best synergistic effect [24,79]. To this end, the bond performance between PPF and cement should be enhanced, so as to reduce the width of ITZ between PPF and cement.…”

Section: Bonding Properties Of Polypropylene Fibre Cement Matrixmentioning

confidence: 99%

“…e PPF-reinforced concrete has better toughness than the plain concrete [24,25]. When PPF is used in concrete, the toughness of pavement can be significantly strengthened [7].…”

Section: Introductionmentioning

confidence: 99%

Review on the Durability of Polypropylene Fibre‐Reinforced Concrete

Liu

Wang

Cao

et al. 2021

Advances in Civil Engineering

View full text Add to dashboard Cite

Polypropylene fibre (PPF) is a kind of polymer material with light weight, high strength, and corrosion resistance. The crack resistance of concrete can be improved by adding PPFs. PPF can optimize the pore size distribution of concrete. As a result, the durability of concrete is significantly enhanced since PPF can block the penetration of water or harmful ions in concrete. This paper summarizes the influence of polypropylene fibre on the durability of concrete, including drying shrinkage, creep, water absorption, permeability resistance, chloride ion penetration resistance, sulfate corrosion resistance, freeze-thaw cycle resistance, carbonation resistance, and fire resistance. The authors analysed the effects of fibre content, fibre diameter, and fibre hybrid ratio on these durability indexes. The durability property of concrete can be further improved by combining PPFs and steel fibres. The drawbacks of PPF in application in concrete are the imperfect dispersion in concrete and weak bonding with cement matrix. The methods to overcome these drawbacks are to use fibre modified with nanoactive powder or chemical treatment. At last, the authors give the future research prospects of concrete made with PPFs.

show abstract

Influence of a hybrid combination of steel and polypropylene fibers on concrete toughness

Cited by 41 publications

References 34 publications

Study on Mechanical Properties and Optimum Fiber Content for Basalt/Polyacrylonitrile Hybrid Fiber Reinforced Concrete

Study on Mechanical Properties and Optimum Fiber Content for Basalt/Polyacrylonitrile Hybrid Fiber Reinforced Concrete

Compressive Toughness Loss Rate and Softening Characteristic Analysis of Pasture Fiber-Rubber Powder Concrete

Review on the Durability of Polypropylene Fibre‐Reinforced Concrete

Contact Info

Product

Resources

About