Mechanical, sound and thermal properties of recycled expanded polystyrene concrete reinforced with 0.5% to 5.5% kenaf fibre

2021 ◽  
pp. 1-14
Author(s):  
Chen Zi Mun ◽  
Kok Zee Kwong ◽  
Foo Wei Lee ◽  
Jee Hock Lim
Keyword(s):  
Thermal Properties ◽  
Expanded Polystyrene ◽  
Kenaf Fibre

scholarly journals The Utilization of Recycled Masonry Aggregate and Recycled EPS for Concrete Blocks for Mortarless Masonry

Materials ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 1923 ◽  
Author(s):  
Tereza Pavlu ◽  
Kristina Fortova ◽  
Jakub Divis ◽  
Petr Hajek
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Masonry Wall ◽  
Expanded Polystyrene ◽  
Mechanical And Thermal Properties ◽  
Concrete Mixtures ◽  
Wall Structures ◽  
Different Types ◽  
Concrete Blocks ◽  
Recycled Masonry

The main aim of this paper is to carry out the environmentally based enhancement of a concrete mixture containing recycled materials whilst considering natural resource consumption as well as mechanical and thermal property levels. The developed concrete is intended to be used in mortarless masonry wall structures. Ten concrete mixtures with different types and replacement rates of recycled masonry aggregate and recycled expanded polystyrene were prepared, and their mechanical and thermal properties were experimentally investigated. It was found that the use of recycled masonry aggregate led to better thermal properties while maintaining sufficient mechanical properties. On the contrary, the addition of recycled expanded polystyrene did not significantly affect the thermal properties of concrete, but the mechanical properties considerably declined. For this reason, the recycled masonry aggregate is suitable to use as an aggregate for concrete masonry blocks for wall structures.

scholarly journals Study about concrete with recycled expanded polystyrene

2019 ◽  
Vol 12 (6) ◽  
pp. 1390-1407 ◽  
Author(s):  
C. H. R. CARVALHO ◽  
L. A. C. MOTTA
Keyword(s):  
Compressive Strength ◽  
Thermal Properties ◽  
Thermal Performance ◽  
Large Volume ◽  
Large Scale ◽  
Expanded Polystyrene ◽  
Low Density ◽  
Structural Walls ◽  
Physical Density

Abstract This work studied the properties of lightweight concretes with addition of expanded polystyrene (EPS) for structural walls applications. EPS for being a material produced on a large scale and has low density, produces a large volume of waste. These residues are not reused, especially in Brazil. Given that, in order to perform a comparison of the performance of concrete with adding of EPS in pearls and recycled, it have been manufactured five concrete types, a control without addition of EPS and four other samples with two different percentages of EPS. The mechanical (compressive strength) and physical (density, voids content, absorption by immersion and capillarity) properties were evaluated, and tests were carried out to evaluate the thermal performance of the mixtures studied. The concretes with EPS presented compressive strength less than the reference concrete, however, the absorption for capillarity and thermal properties was better in concretes with EPS. It is concluded that it is feasible to replace the EPS in pearls by recycled EPS, due to the close results found.

scholarly journals Effect of Chemically Treated Kenaf Fibre on Mechanical and Thermal Properties of PLA Composites Prepared through Fused Deposition Modeling (FDM)

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3299
Author(s):  
Aida Haryati ◽  
Nadlene Razali ◽  
Michal Petrů ◽  
Mastura Taha ◽  
Noryani Muhammad ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Polymer Matrix ◽  
Chemical Treatment ◽  
Natural Fibre ◽  
Silane Treatment ◽  
Electron Micrograph ◽  
Scanning Electron Micrograph ◽  
Kenaf Fibre ◽  
Reinforcing Agent ◽  
Scanning Electron

Natural fibre as a reinforcing agent has been widely used in many industries in this era. However, the reinforcing agent devotes a better strength when embedded with a polymer matrix. Nevertheless, the characteristic of natural fibre and polymer matrix are in contrast, as natural fibre is hydrophilic, while polymer is hydrophobic in nature. Natural fibre is highly hydrophilic due to the presence of a hydroxyl group (-OH), while polymer matrix has an inherent hydrophobic characteristic which repels water. This issue has been fixed by modifying the natural fibre’s surface using a chemical treatment combining an alkaline treatment and a silane coupling agent. This modifying process of natural fibre might reduce the attraction of water and moisture content and increase natural fibre surface roughness, which improves the interfacial bonding between these two phases. In this paper, the effect of alkaline and silane treatment has been proven by performing the mechanical test, Scanning Electron Micrograph (SEM), and Fourier Transform Infrared spectrometry (FTIR) to observe the surface structure. The chemical compositions and thermal properties of the composites have been obtained by performing Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA) tests. 1.0% silane treatment displayed better strength performance as compared to other composites, which was proven by performing Scanning Electron Micrograph (SEM). The assumption is that by enduring chemical treatment, kenaf fibre composites could develop high performance in industry applications.

scholarly journals Manufacturing of porous refractories from Iraqi Kaolin by adding expanded polystyrene waste

2018 ◽  
Vol 16 (37) ◽  
pp. 118-126
Author(s):  
Shihab A. Zaidan
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Linear Shrinkage ◽  
Expanded Polystyrene ◽  
Apparent Porosity ◽  
Final Outcome ◽  
Modulus Of Rupture ◽  
Mechanical And Thermal Properties ◽  
Polystyrene Waste

Fabrication of porous clay refractory insulating specimens from Iraqi kaolin with different percentage of Expanded Polystyrene (EPS) waste crumbs additions were investigated. After mixing and forming by hand molding, the specimens was dried and fired at 1300 oC. The structural, physical, mechanical and thermal properties of the refractory insulating products were measured. Maximum addition of EPS (1.25 wt%) lead to reduce the linear shrinkage to less than 1.7% and increased apparent porosity up to 50 %. As well as, the density, Modulus of rupture and thermal conductivity were reduced to 1.39 g/cm3, 4.1 MPa and 0.21 W/m.K, respectively. The final outcome, addition of EPS showed good results in the formation of pores without distorting the dimensions of specimens and without any cracks. In addition, it is possible to use these thermal insulators at temperatures up to 1300 oC.

scholarly journals Thermal and Dynamic Properties of Woven Kenaf/Carbon Fibre Reinforced Epoxy Hybrid Composite

2019 ◽  
Author(s):  
Humaira Alias Aisyah ◽  
Md. Tahir Paridah ◽  
Salit Mohammad Sapuan ◽  
Abdan Khalina ◽  
Omer Berk Berkalp ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Carbon Fibre ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Dynamic Properties ◽  
Fibre Composite ◽  
Carbon Fibre Composite ◽  
Kenaf Fibre ◽  
Pure Carbon ◽  
Woven Kenaf

The effects of carbon fiber hybridisation on the thermal properties of woven kenaf reinforced epoxy composites kenaf fibre were studied. Woven kenaf hybrid composites at the different weave designs of plain and satin, and fabric count of 5 × 5 and 6 × 6 were manually prepared by vacuum infusion technique. Thermal properties of pure carbon fibre and hybrid composites were conducted by using thermogravimetric analyser (TGA) and differential scanning calorimeter (DSC). It was found that at high kenaf fibre content showed better thermal stability while the highest thermally stable was found in pure carbon fibre composite. The TG and DTG results showed that the amount of residue decreased in plain-designed hybrid composite compared to satin-designed hybrid composite. The DSC data revealed that the presence of woven kenaf increase decomposition temperature.

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