Splitting Tensile Strength of Lightweight Foamed Concrete with Polypropylene Fiber

Foamed concrete is material that can be used in wide range of constructions and produced in high density. This investigation examined effect of chopped Polypropylene Fiber (PF) that mixed into admixture concerning strength of foamed concrete high density. Mechanical test were performed to measure effect of PF on improving compressive and splitting tensile strength. Result indicate that PF significantly improving compressive strength and behavior of PF where drawn into foamed concrete similarly with normal concrete. The fibrillated PF has been occurred and reduced the micro crack of matrix and prevented propagation crack growth. The presence of PF improved splitting tensile strength was not significantly. Influence of porous of foamed concrete is considered. Scanning Electron Microscope (SEM) exhibits condition microstructure of foamed concrete reinforced PF that alter microstructure, especially interfacial bonding due to PF presence.

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Mechanical Properties of Fiber Reinforced Lightweight Aggregate Concrete

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.477.274 ◽

2011 ◽

Vol 477 ◽

pp. 274-279 ◽

Cited By ~ 1

Author(s):

Yi Xu ◽

Lin Hua Jiang ◽

Hong Qiang Chu ◽

Lei Chen

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Compressive Strength ◽

Water Hyacinth ◽

Steel Fiber ◽

Polypropylene Fiber ◽

Lightweight Aggregate ◽

Splitting Tensile Strength ◽

Lightweight Aggregate Concrete ◽

Fiber Types

In this study, the effects of fiber types on the mechanical properties of lightweight aggregate concretes were investigated. Three types of fibers, namely, polypropylene fiber, steel fiber and water hyacinth (Eichhornia crassipes) fiber, and two types of lightweight aggregates, namely, expanded polystyrene and ceramsite were used. The compressive strength and splitting tensile strength of concretes were tested. The results show that both the compressive strength and the splitting tensile strength were improved by adding a reasonable volume of steel fiber and polypropylene fiber into LWAC. The addition of water hyacinth fiber had little effect on the compressive strength of LWAC, while a little increase was observed in the splitting tensile strength.

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Effect of Curing Method on Properties of Lightweight Foamed Concrete

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i2.29.14285 ◽

2018 ◽

Vol 7 (2.29) ◽

pp. 927 ◽

Cited By ~ 2

Author(s):

Bishir Kado ◽

Shahrin Mohammad ◽

Yeong Huei Lee ◽

Poi Ngian Shek ◽

Mariyana Aida Ab Kadir

Keyword(s):

Tensile Strength ◽

Compressive Strength ◽

Water Absorption ◽

Precast Concrete ◽

Construction Materials ◽

Splitting Tensile Strength ◽

Structural Members ◽

Lightweight Construction ◽

Foamed Concrete ◽

Curing Method

Lightweight construction is aimed to achieve a sustainable feature by reducing transportation frequency and construction materials usage during construction phase. Lightweight precast concrete may serve an alternative for the lightweight construction. There are rarely application can be found for structural members as lightweight panels always to be used for secondary or non-load bearing members. This paper presents an experimental study on properties (compressive strength, splitting tensile strength, water absorption) of lightweight foamed concrete (LFC) at two different curing methods. LFC with densities of 1500, 1700, and 1800 kg/m3, cement-sand ratio of 2:1 and water-cement ratio of 0.5 were investigated. The results showed LFC can be produced with the properties ofdensity range of 1500 to 1800 kg/m3 and corresponding compressive strength of 10 to 39 MPa. The higher the density of LFC, the less the water absorption for all the curing method considered, the highest and the lowest water absorption was 11.3% and 2.0% for 1500 kg/m3 cured in water and 1800 kg/m3 cured in air respectively. Compressive strength of LFC increases with age and density while water cured LFC has high compressive strength. Splitting tensile strength increases with density of LFC, but air cured LFC has more splitting tensile strength than water cured of the same density. The highest splitting tensile strength recorded was 3.92 MPa for 1800 kg/m3 cured in air, which was about 16% of its compressive strength at 28 days of curing age. These properties are important and can be applied to LFC precast structural members with air or water curing method which have less references for LFC in structural usage.

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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 .

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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.

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Properties of foamed concrete reinforced with hybrid fibres

MATEC Web of Conferences ◽

10.1051/matecconf/201816202012 ◽

2018 ◽

Vol 162 ◽

pp. 02012 ◽

Cited By ~ 2

Author(s):

Waleed Abbas ◽

Eethar Dawood ◽

Yahya Mohammad

Keyword(s):

Tensile Strength ◽

Compressive Strength ◽

Splitting Tensile Strength ◽

The Other ◽

Carbon Fibres ◽

Volumetric Fraction ◽

Polypropylene Fibres ◽

Concrete Mix ◽

Foamed Concrete ◽

Hardened Properties

The properties of foamed concrete reinforced with carbon fibres and hybrid fibres of carbon with polypropylene fibres has been studied. Various volumetric fractions of carbon fibres (0.5, 1 and 1.5%), hybrid fibres of carbon fibres (CF) with polypropylene fibres (PPF) as (1% CF + 0.5% PPF) & (0.5% CF + 1% PPF), also the mono polypropylene fibres as 1.5% PPF were used to reinforce foamed concrete mix. Fresh and hardened properties of all mixes included flowability, density, absorption, compressive strength, splitting tensile strength, and flexural strengths has been tested. Results showed that inclusion of carbon fibres up to 1% volumetric fraction may increase the compressive strength by about 36% higher than that of control mix. Whereas, the use of 1.5% carbon fibres exhibit significant increase in splitting and flexural tensile strengths by about 47 and 114%, respectively, compared to the reference mix. On the other hand, the hybridization of 1% CF + 0.5% PPF increased the splitting tensile strength and flexural strengths by 53% and 114%, respectively, compared with plain foamed concrete mix.

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Effects of Polypropylene Fiber on Plastic Shrinkage Crack and Mechanical Properties of Concrete

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.324-325.487 ◽

2006 ◽

Vol 324-325 ◽

pp. 487-490 ◽

Cited By ~ 1

Author(s):

Xue Ying Li ◽

Jing Zhao ◽

Wei Zhe Wang ◽

Alan Jiang

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Compressive Strength ◽

Crack Width ◽

Volume Fraction ◽

Polypropylene Fiber ◽

Splitting Tensile Strength ◽

Fiber Reinforced Concrete ◽

Shrinkage Crack ◽

Plastic Shrinkage

This paper reports on the mechanical properties and plastic shrinkage crack of concrete containing modified polypropylene fibera kind of new porous polypropylene fiber. Results of crack properties tests show that after adding modified polypropylene fiber, crack area, maximum crack width and average crack width of concrete decreased markedly. Results of mechanical properties show that flexural and splitting tensile strength of concrete with 1.0‰ modified polypropylene fiber volume fraction at 28 days increased 24% and 28% respectively compared to the reference concrete; Reticulate polypropylene fiber has less effects than modified polypropylene fiber on flexural and splitting tensile strength. Compressive strength of fiber reinforced concrete changed slightly, but flexural strength and splitting tensile strength increased, and the ratio of splitting tensile strength to compressive strength decreased.

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Contribution of Polypropylene Fibre in Improving Strength of Foamed Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.626.762 ◽

2012 ◽

Vol 626 ◽

pp. 762-768 ◽

Cited By ~ 7

Author(s):

Josef Hadipramana ◽

Abdul Aziz Abdul Samad ◽

Ahmad Mujahid Ahmad Zaidi ◽

Noridah Mohammad ◽

Noorwirdawati Ali

Keyword(s):

Tensile Strength ◽

Mechanical Test ◽

Polypropylene Fibre ◽

Splitting Tensile Strength ◽

Interfacial Bonding ◽

Normal Concrete ◽

Conventional Concrete ◽

Wide Range ◽

Strength Behavior ◽

Foamed Concrete

Foamed concrete as favorable substitution conventional concrete can be used in wide range of constructions. Usage the Polypropylene Fibre (denoted as PF) in this investigation examined contribution of PF on strength of foamed concrete. Mechanical test were performed to measure effect of PF on improving compressive and splitting tensile strength. Results indicate that PF significantly improving compressive and splitting tensile strength. Behavior of PF where drawn into foamed concrete similarly with normal concrete. The fibrillation and interfacial bonding between PF and matrix has been occurred and reduced the micro crack of matrix and prevented propagation crack growth. However influence of porous of foamed concrete is considered. Process of curing continuation 60 and 90 days indicate that interfacial adhesion is wider when cement hydration process is running. Scanning Electron Microscope (SEM) exhibits condition microstructure of foamed concrete added by PF alter the microstructure, especially interfacial bonding between PF and matrix.

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Mechanical Properties of Mortar Using Polypropylene Fibers

10.47363/jcert/2020(2)106 ◽

2020 ◽

pp. 1-4

Author(s):

Eethar Thanon Dawood ◽

◽

Tamara Waleed Ghanim ◽

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Compressive Strength ◽

Flexural Strength ◽

Volume Fraction ◽

Polypropylene Fiber ◽

Splitting Tensile Strength ◽

Experimental Results ◽

Polypropylene Fibers ◽

Low Volume

In the present paper the behavior of mortar reinforced with polypropylene fibers was studied. Different percentages of polypropylene fibers such as 0, 0.2, 0.4, 0.6 and 0.8% as volumetric fractions were used. Different properties which are flowability, density, compressive strength, flexural strength and splitting tensile strength were evaluated for all mix combinations. The experimental results indicated that a reduction in flowability was obtained with increased polypropylene fibers content. Besides, it can be concluded that the incorporation of polypropylene fiber may significantly reduce the density of mortar. The use of low volume fraction of polypropylene fiber improves the mechanical properties of HPM. Thus, the use of 0.2% of such fiber increases compressive strength by about (4-10%), at various ages.

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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.

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