Study on Steel and polypropylene hybrid fiber reinforced concrete–  A review

Increasing demand and inadequate materials availability leads the researchers to find alternate materials. In general, hybrid fiber is nothing but mixture of two or more fibers. In this review, various properties of steel fibers and polypropylene fibers were studied. In order to study the physical and mechanical properties of steel fiber, polypropylene fiber and other materials used in concrete, various tests such as Slump cone test, Compaction factor, Compressive strength , flexural strength etc., were used. Hybrid fibers have the tendency to control cracks at different levels. Workability of concrete get reduced due to more addition of steel fibers.The addition of steel fiber and polypropylene fiber results in an increase of 12 to 14.30% compressive strength, 33 to 36.6% increase in flexural strength and 9 to 10.16% increase in split tensile strength. Addition of most favorable amount 0.9 to 1% of steel fiber and 0.9 to 1% of polypropylene fiber gives maximum compressive strength up to 41.67 to 42.68%. Split tensile strength increases by increasing the fiber content in concrete but workability decreases when steel fiber content is increased in concrete.

Download Full-text

Mechanical properties of steel-polypropylene hybrid fiber reinforced concrete in building structure

Stavební obzor - Civil Engineering Journal ◽

10.14311/cej.2021.02.0037 ◽

2021 ◽

Vol 30 (2) ◽

Author(s):

Tao Zhang ◽

Deng Pan

Keyword(s):

Tensile Strength ◽

Compressive Strength ◽

Reinforced Concrete ◽

Performance Optimization ◽

Steel Fiber ◽

Polypropylene Fiber ◽

Fiber Reinforced Concrete ◽

Building Structure ◽

Fiber Reinforced ◽

Hybrid Fiber

This study mainly analyzed the effect of steel fiber (SF) mixed with polypropylene fiber (PF) on the performance optimization of concrete. Firstly, the steel fiber reinforced concrete (SFRC), polypropylene fiber reinforced concrete (PFRC) and steel-polypropylene hybrid fiber reinforced concrete (SP-HFRC) specimens were designed. Then, the slump experiment, compressive strength experiment, and tensile strength experiment were carried out. The results demonstrated that the increase of fibers reduced the slump, and the influence of PF on the slump was the largest, followed by SF and SP; when the content of SF was 1% and the content of PF was 0.1%, the compressive strength and tensile strength of the concrete were 73.16 MPa and 6.33 MPa, which was superior to the concrete mixed with single fiber. The experimental results demonstrate that SP-HFRC has a superiority in mechanical property and can be further promoted and applied in building structure.

Download Full-text

Orthogonal Experimental Study on Properties of Hybrid Fiber Reinforced Cement Mortar

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.168-170.456 ◽

2010 ◽

Vol 168-170 ◽

pp. 456-459

Author(s):

Hai Yan Yuan ◽

Shui Zhang ◽

Guo Zhong Li

Keyword(s):

Compressive Strength ◽

Flexural Strength ◽

Steel Fiber ◽

Cement Mortar ◽

Polypropylene Fiber ◽

Fiber Reinforced ◽

Hybrid Fiber ◽

Factors Affecting ◽

Fiber Fraction ◽

Reinforced Cement

By adopting the method of orthogonal experimental design, the effect of three independent variables, that is steel fiber fraction, polypropylene fiber fraction and silica fume fraction on the compressive strength, flexural strength and shrinkage of cement mortar was studied. The results indicate that steel fiber is one of the most important factors affecting compressive strength and shrinkage, and polypropylene fiber is one of the most important factors affecting flexural strength and shrinkage of cement mortar. By using deviation analysis to analyze the orthogonal experiment results, the optimized mix proportion of hybrid fiber reinforced cement mortar is determined. The hybrid effect of steel fiber and polypropylene fiber on the properties of cement mortar is discussed.

Download Full-text

Experimental Study on Axial Tensile Strength of Low Volume Fraction of Ternary Hybrid Fiber Reinforced Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.906.329 ◽

2014 ◽

Vol 906 ◽

pp. 329-334

Author(s):

Yu Ting Zhu ◽

Dong Tao Xia ◽

Bo Ru Zhou

Keyword(s):

Tensile Strength ◽

Compressive Strength ◽

Steel Fiber ◽

Polypropylene Fiber ◽

Strength Test ◽

Splitting Tensile Strength ◽

National Standard ◽

Fiber Reinforced ◽

Hybrid Fiber ◽

Advantages And Disadvantages

In this paper, according to the national standard and testing methods,the direct tension strength,splitting tensile strength and cubic compressive strength test were carried out for 8 different groups of hybrid fiber (containing steel fiber, macro-polypropylene fiber and dura fiber) reinforced HPC specimens.The results showed that when the volume proportion of ternary hybrid fiber was less than 1%, there was not obvious influence for the concrete compressive strength, but the splitting tensile strength increased by 26% ~ 69%; the ratio between splitting tensile strength and compressive strength for HFRC increased to 1/12~1/9. When added 0.7% steel fiber, 0.19% macro-polypropylene fiber and 0.11% dura fiber, the confounding effect was the best. Based on the advantages and disadvantages of tensile splitting strength and direct tensile strength test and the results of tests, the concept of equivalent tensile strength and calculative formula was put forward .

Download Full-text

Experimental Behaviour of Fiber Reinforced Reactive Powder Concrete

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.a1010.1291s419 ◽

2019 ◽

Vol 9 (1S3) ◽

pp. 454-459 ◽

Cited By ~ 2

Keyword(s):

Tensile Strength ◽

Compressive Strength ◽

Flexural Strength ◽

Polypropylene Fiber ◽

Chloride Diffusion ◽

Sisal Fiber ◽

Reactive Powder Concrete ◽

Coir Fiber ◽

Split Tensile Strength ◽

Reactive Powder

In this paper various mix proportions of Reactive Powder Concretes were formulated using ordinary Portland cement, Fly ash, Micro silica, Silica Fume, Quartz powder etc and these concretes were subjected to strength test. The best mix was selected for further in depth study with fibers like Sisal fiber, Coir fiber, Hair fiber and Polypropylene fiber mixed Reactive Powder Concrete and the various tests have been performed Cube Compressive strength, Cylinder Compressive strength, Flexural strength, Split Tensile strength, Shear test, Water absorption, Sorptivity and Chloride diffusion etc. As a result, fiber incorporated concrete shows increasing Flexural strength, splitting tensile strength, and shear strength up to 30% as compared to control RPC and gives minimal decrease in compressive strength by the addition of fibers. These characteristics make it as a promising material for casting non structural elements such as pressure pipes, flooring tiles, Partition panels, door and window frames. It can also be used as repair materials.

Download Full-text

Research on compressive strength of hybrid fiber reinforced concrete based on orthogonal design

E3S Web of Conferences ◽

10.1051/e3sconf/202126102019 ◽

2021 ◽

Vol 261 ◽

pp. 02019

Author(s):

Tu-Sheng He ◽

Meng-Qian Xie ◽

Yang Liu ◽

San-Yin Zhao ◽

Zai-Bo Li

Keyword(s):

Compressive Strength ◽

Reinforced Concrete ◽

Prediction Model ◽

Steel Fiber ◽

Volume Fraction ◽

Polypropylene Fiber ◽

Fiber Reinforced Concrete ◽

Fiber Reinforced ◽

Concrete Compressive Strength ◽

Hybrid Fiber

The influence of steel fiber and polypropylene fiber mixed on compressive strength of high performance concrete (HPC) was studied. The steel fiber content (0.5%, 1.0%, 1.5%, 2.0%) (volume fraction, the same below), polypropylene fiber content (0.05%, 0.1%, 0.15%, 0.2%) and length (5mm, 6.5mm, 12mm, 18mm) were studied by L16 (45) orthogonal test for 28d ages, the range analysis and variance analysis of the test results are carried out, and the prediction model of compressive strength of hybrid fiber reinforced concrete was established. The results show that: The significant influence factor of concrete compressive strength is the volume fraction of polypropylene fiber, while the length of polypropylene fiber and the volume fraction of steel fiber are not significant; the concrete compressive strength with polypropylene fiber shows negative hybrid effect; The prediction model of compressive strength of hybrid fiber reinforced concrete has high accuracy, and the average relative errors is 2.96%.

Download Full-text

Experimental Investigation on Mechanical Properties of Hybrid Fiber Reinforced Quaternary Cement Concrete

Journal of Engineered Fibers and Fabrics ◽

10.1177/155892501501000407 ◽

2015 ◽

Vol 10 (4) ◽

pp. 155892501501000

Author(s):

Ramesh Kanagavel ◽

K. Arunachalam

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Compressive Strength ◽

Impact Resistance ◽

Polypropylene Fiber ◽

Fiber Reinforced Concrete ◽

Fiber Reinforced ◽

Cement Concrete ◽

Split Tensile Strength ◽

Polypropylene Fiber Reinforced Concrete

Mechanical properties of quaternary blending cement concrete reinforced with hybrid fibers are evaluated in this experimental study. The steel fibers were added at volume fractions of 0.5%, 1%, and 1.5 % and polypropylene fibers were added at 0.25% and 0.5% by weight of cementitious materials in the concrete mix individually and in hybrid form to determine the compressive strength, split tensile strength, flexural strength and impact resistance for all the mixes. The experimental results revealed that fiber addition improves the mechanical properties and also the ductility and energy absorption of the concrete. The results also demonstrate that the hybrid steel – polypropylene fiber reinforced concrete performs better in compressive strength, split tensile strength, flexural strength and impact resistance than mono steel and mono polypropylene fiber reinforced concrete.

Download Full-text

Experimental Study on Mechanical Properties and Fractal Dimension of Pore Structure of Basalt–Polypropylene Fiber-Reinforced Concrete

Applied Sciences ◽

10.3390/app9081602 ◽

2019 ◽

Vol 9 (8) ◽

pp. 1602 ◽

Cited By ~ 8

Author(s):

Ditao Niu ◽

Daguan Huang ◽

Hao Zheng ◽

Li Su ◽

Qiang Fu ◽

...

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Compressive Strength ◽

Fractal Dimension ◽

Pore Structure ◽

Polypropylene Fiber ◽

Splitting Tensile Strength ◽

Fiber Reinforced Concrete ◽

Hybrid Fibers ◽

Air Content

This study investigates the effects of basalt–polypropylene fibers on the compressive strength and splitting tensile strength of concrete and calculates the fractal dimension of the pore structure of concrete by using a fractal model based on the optical method. Test results reveal that hybrid fibers can improve the compressive strength and splitting tensile strength of concrete, and the synergistic effect of the hybrid fibers is strongest when the contents of basalt fiber (BF) and polypropylene fiber (PF) are 0.05% each, and that the maximum increments in compressive strength and splitting tensile strength are 5.06% and 9.56%, respectively. The effect of hybrid fibers on splitting tensile strength is greater than on compressive strength. However, hybrid fibers have adverse effects on mechanical properties when the fiber content is too high. The pore structure of basalt–polypropylene fiber-reinforced concrete (BPFRC) exhibits obvious fractal characteristics, and the fractal dimension is calculated to be in the range of 2.297–2.482. The fractal dimension has a strong correlation with the air content and spacing factor: the air content decreases significantly whereas the spacing factor increases with increasing fractal dimension. In addition, the fractal dimension also has a strong positive correlation with compressive strength and splitting tensile strength. Therefore, the fractal dimension of the pore structure can be used to evaluate the microscopic pore structure of concrete and can also reflect the influence of the complexity of the pore structure on the macroscopic mechanical properties of concrete.

Download Full-text

Influence of polypropylene fiber on early strength of self-compacting concrete

MATEC Web of Conferences ◽

10.1051/matecconf/201925801020 ◽

2019 ◽

Vol 258 ◽

pp. 01020

Author(s):

Rahmi Karolina ◽

Abdiansyah Putra Siregar

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Compressive Strength ◽

Flexural Strength ◽

Polypropylene Fiber ◽

Fiber Content ◽

Polypropylene Fibers ◽

Self Compacting Concrete ◽

Concrete Technology ◽

Early Strength

One of the development of concrete technology in construction’s world is Self-Compacting Concrete. Self-Compacting Concrete (SCC) is an innovative concrete that able to “flow” and condensed by gravity and its own weight with little vibration or even without a vibration device at all. However, these concrete still have deficiencies like general concrete that is weak to tensile. To increase the tensile strength of the concrete is by adding fiber into the mix. One type of fiber that can be used as an additive to the mix is Polypropylene fibers. This study aims to determine the effect of adding polypropylene fibers to the mechanical properties and characteristics of SCC concrete and to know the optimal polypropylene fiber content in the manufacture of Self Compacting Concrete. Fiber addition variations are 0 kg / m3; 0.25 kg / m3; 0.5 kg / m3 and 0.75 kg / m3. The result of the research showed that the variation of 0.5 kg / m3 and 0.75 kg / m3 addition of fibers didn’t fulfill the requirements to be categorized as a SCC concrete. The results of hard concrete test showed the highest compressive strength that is on the SCC PP concrete of 22.31 MPa at the age of 1 day and 46.24 at the age of 28 days. The highest strength is on the SCC 0.25 PP concrete of 6.52 MPa at the age of 1 day and 10.07 at the age of 28 days. The highest flexural strength is on the SCC 0.25 PP concrete of 6.76 at the age of 1 day and 8.60 at the age of 28 days.

Download Full-text

Study on Mechanical Properties of Hybrid Polypropylene-Steel Fiber RPC and Computational Method of Fiber Content

Materials ◽

10.3390/ma13102243 ◽

2020 ◽

Vol 13 (10) ◽

pp. 2243

Author(s):

Chunling Zhong ◽

Mo Liu ◽

Yunlong Zhang ◽

Jing Wang ◽

Dong Liang ◽

...

Keyword(s):

Tensile Strength ◽

Compressive Strength ◽

Steel Fiber ◽

Polypropylene Fiber ◽

Area Ratio ◽

Fiber Content ◽

Splitting Tensile Strength ◽

Optimum Content ◽

Pore Area ◽

Reactive Powder

On the basis of determining the optimum content of polypropylene fiber reactive powder concrete (RPC), the influence of different steel fiber content on the compressive strength and splitting tensile strength of hybrid polypropylene-steel fiber RPC was studied. The particle morphology and pore parameters of hybrid polypropylene-steel fiber RPC were analyzed by combining scanning electron microscope (SEM) with image-pro plus (IPP) software. The results showed that the RPC ductility can be further improved on the basis of polypropylene fiber RPC, the compressive strength and splitting tensile strength of polypropylene fiber. The optimum content of hybrid polypropylene-steel fiber RPC is 0.15% polypropylene fiber, 1.75% steel fiber. Hybrid polypropylene-steel fiber RPC is mainly composed of particles with small particle size. The particle area ratio first increased and decreased with the increase of steel fiber content, and the maximum steel fiber content is 1.75%. The pore area ratio first decreased and increased with the increase of steel fiber content, and the pore area ratio is the smallest when the steel fiber content is 1.75%. The calculation methods of polypropylene fiber content and steel fiber content and 28-day RPC compressive strength and splitting tensile strength are proposed to select polypropylene fiber content and steel fiber content flexibly according to different engineering requirements, which can provide important guidance for the popularization and application of RPC in practical engineering.

Download Full-text