Effect of Polypropylene Fibres on the Thermal Conductivity of Lightweight Foamed Concrete

Jhatial, Ashfaque Ahmed; Goh, Wan Inn; Mohamad, Noridah; Alengaram, U. Johnson

doi:10.1051/matecconf/201815003008

Cited by 29 publications

(20 citation statements)

References 16 publications

(15 reference statements)

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“…Previous research indicated that relatively high thermal conductivity reduction with polypropylene, as compared to AR-glass, kenaf, steel and oil palm fibres [ 36 ] and steel fibres would not likely increase the concrete thermal conductivity [ 214 ]. Other findings also showed the polypropylene fibres reduced concrete thermal conductivity [ 132 ].…”

Section: Properties Of Frfcmentioning

confidence: 99%

Fibre-Reinforced Foamed Concretes: A Review

et al. 2020

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Foamed concrete (FC) is a high-quality building material with densities from 300 to 1850 kg/m3, which can have potential use in civil engineering, both as insulation from heat and sound, and for load-bearing structures. However, due to the nature of the cement material and its high porosity, FC is very weak in withstanding tensile loads; therefore, it often cracks in a plastic state, during shrinkage while drying, and also in a solid state. This paper is the first comprehensive review of the use of man-made and natural fibres to produce fibre-reinforced foamed concrete (FRFC). For this purpose, various foaming agents, fibres and other components that can serve as a basis for FRFC are reviewed and discussed in detail. Several factors have been found to affect the mechanical properties of FRFC, namely: fresh and hardened densities, particle size distribution, percentage of pozzolanic material used and volume of chemical foam agent. It was found that the rheological properties of the FRFC mix are influenced by the properties of both fibres and foam; therefore, it is necessary to apply an additional dosage of a foam agent to enhance the adhesion and cohesion between the foam agent and the cementitious filler in comparison with materials without fibres. Various types of fibres allow the reduction of by autogenous shrinkage a factor of 1.2–1.8 and drying shrinkage by a factor of 1.3–1.8. Incorporation of fibres leads to only a slight increase in the compressive strength of foamed concrete; however, it can significantly improve the flexural strength (up to 4 times), tensile strength (up to 3 times) and impact strength (up to 6 times). At the same time, the addition of fibres leads to practically no change in the heat and sound insulation characteristics of foamed concrete and this is basically depended on the type of fibres used such as Nylon and aramid fibres. Thus, FRFC having the presented set of properties has applications in various areas of construction, both in the construction of load-bearing and enclosing structures.

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Section: Properties Of Frfcmentioning

confidence: 99%

Fibre-Reinforced Foamed Concretes: A Review

et al. 2020

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“…Steel, in the shape of steel bars, is known to be strong in tension, has been used to reinforce the concrete, such that reinforced concrete withstands the tension loads. But with the steel bar reinforcement, the weight of structural element increases thus exerting more self-weight or dead load on the structure (Jhatial et al, 2018). To reduce the dead load, Fibre Reinforced Concrete (FRC) was introduced.…”

Section: Literature Reviewmentioning

confidence: 99%

Effect of steel fibres on the compressive and flexural strength of concrete

Jhatial¹,

Sohu²,

Bhatti³

et al. 2018

Int. j. adv. appl. sci.

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Concrete, which is made of cement, fine and coarse aggregates and water, is the most used building material in the world. It's durable, strength and ease of availability have been its main advantages. Concrete is strong in compression while it is known to be weak in tensile. Over the years different methods and materials have been utilized to reinforce concrete to overcome such weakness. Fibre reinforcement has shown considerable improvement in the properties of concrete. Therefore, in this study, M20 grade concrete was reinforced with steel fibres which were added at a volume fraction of 1%, 2%, 3%, 4% and 5% and compared with a control sample with no steel fibres. The effect on the workability of concrete with the steel fibre reinforcement was determined as well as the effect on flexural and compressive strengths concrete. Based on the results, the reinforcement of steel fibres had a significant adverse impact on the workability, with the increase in fibre content, the workability decreased. On the other hand, a significant enhancement was observed in the mechanical properties of concrete with the addition of steel fibres, achieving higher strength than the control sample. The highest compressive and flexural strength was gained with the addition of 3%, a further increase in fibre content decreased the strength. Therefore, the optimum dosage of steel fibres was determined to be 3%. Although the compressive and flexural strengths are still higher at 5% reinforcement compared to controlled sample.

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“…Polypropylene is a polymerized version of propylene which is a by-product of petroleum refining [12]. PP fibre is a unique thermoplastic polymer and is categorized as synthetically organic fibre.…”

Section: Polypropylene (Pp) Fibresmentioning

confidence: 99%

“…Jhatial et al, [12] studied the effect of PP fibres on the compressive strength and thermal conductivity of 1600 kg/m 3 density lightweight foamed concrete. Three percentages of PP fibres, i.e., 0.20%, 0.25% and 0.30% were added into the foamed concrete and compared with control sample.…”

Section: Polypropylene (Pp) Fibresmentioning

confidence: 99%

Influence of Fibre Length on the Behaviour of Polypropylene Fibre Reinforced Cement Concrete

et al. 2018

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Concrete being a mixture of cement, aggregates (fine and coarse) and water, can be used in vast range of applications. It has excellent durability and availability which are its main advantages. Though, concrete is strong in compression it is comparatively weak in tensile loading. Over the years various materials have been used to reinforce concrete to withstand the tensile stresses. Polypropylene fibre is one such fibre which comes in varied sizes, is nowadays being utilized to reinforce concrete. In this study, three PP fibres were used at 0.20%, 0.25% and 0.30% content by weight. The flexural and compressive strengths were determined. Based on the results, it was observed with increase in size of fibre the compressive strength decreased significantly though it was still higher than the controlled sample. The length of PP fibres had significant effect on the compressive strength and flexural strength of concrete. Short PP fibres showed relatively higher compressive strength but lower flexural strength when higher fibre content is used, while long PP fibres achieved lower compressive strength but higher flexural strength than shorter PP fibres. The optimum dosage for both PP fibre sizes was 0.25% at which it achieved increased strength as compared to control sample.

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Effect of Polypropylene Fibres on the Thermal Conductivity of Lightweight Foamed Concrete

Cited by 29 publications

References 16 publications

Fibre-Reinforced Foamed Concretes: A Review

Fibre-Reinforced Foamed Concretes: A Review

Effect of steel fibres on the compressive and flexural strength of concrete

Influence of Fibre Length on the Behaviour of Polypropylene Fibre Reinforced Cement Concrete

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