Analysis of Thermal Insulation Building Materials Based on Natural Fibers

Florea, Iacob; Manea, Daniela Lucia

doi:10.1016/j.promfg.2019.02.207

Cited by 55 publications

(28 citation statements)

References 5 publications

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“…Several studies have been carried out to investigate the incorporation of wool fibers in cementitious materials to improve the thermal insulation properties [6,7,8,9]. However, only a few studies, described next, have incorporated wool fibers with the purpose of improving the mechanical performance of cementitious composites.…”

Section: Introductionmentioning

confidence: 99%

Rendering Mortars Reinforced with Natural Sheep’s Wool Fibers

2019

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The susceptibility of rendering mortars to cracking is a complex phenomenon. Fibers have been incorporated in mortars to ensure the durability of the render and can improve the flexural strength, fracture toughness, and impact resistance of the mortars. Aside from the better cracking performance of fiber reinforced mortars, natural fibers have been a path to reducing the environmental impacts of construction materials. Recycling has high sustainability-related potential as it can both mitigate the amount of waste being inadequately disposed and reduce the consumption of natural raw materials. Studies on the incorporation of waste in civil engineering materials have been growing, and recycled fibers may be feasible to incorporate in mortars. Natural fibers are considered as a viable replacement for synthetic ones. Several studies have investigated vegetal fibers in cementitious composites. However, only a few have focused on the incorporation of waste animal-based fiber. The aim of this work is to analyze the feasibility of the use of natural sheep’s wool fibers on the reinforcement of mortars and in particular to improve their cracking behavior. For this purpose, two different binders were used: cement and cement-lime mortars were produced. The incorporation of 10% and 20% (in volume) of 1.5 cm and 3.0 cm wool fibers was analyzed. The results show that the incorporation of wool fibers increased the ductility of the mortars and improved their mechanical properties.

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Section: Introductionmentioning

confidence: 99%

Rendering Mortars Reinforced with Natural Sheep’s Wool Fibers

2019

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“…Konsumsi energi pada bangunan didominasi penggunaan energi untuk penerangan, penyejuk udara, pemanas ruangan, dan penggunaan alat elektronik lainnya. Bangunan mengkonsumsi energi sebesar 47,6% dan menghasilkan emisi CO2 sebesar 44,6% [2] .…”

Section: Pendahuluanunclassified

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et al. 2021

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Pemakaian material insulasi termal pada bangunan menjadi topik penting dalam upaya efesiensi konsumsi energi listrik. Material insulasi termal berbasis serat alam menjadi alternatif dari serat sisntetis yang banyak digunakan sekarang ini. Kestabilan termal material pembentuk menjadi penting untuk diketahui sebagai dasar kelayakan sebagai material insulasi termal. Kayu kelapa sawit (KKS) dan serat rami (SR) mempunyai potensi sebagai bahan baku material insulasi termal dari serat alam. Penelitian ini bertujuan untuk mengkaji stabilitas termal kayu kelapa sawit dan serat rami sebagai bahan baku material insulasi termal berbasis serat alam. Partikel kayu kelapa sawit dan serat rami mendapat perlakuan sebelum diuji. Kayu kelapa sawit direndam dalam air panas 100 0 C selama 30 menit dan serat rami dalam larutan NaOH 5% dengan waktu yang sama. Pengujian thermogravimetric analysis (TGA) dan diferensial scanning clorimetry (DSC) dilakukan untuk mendapatkan karakteristik termal kedua bahan baku. Pengujian dilakukan untuk kedua serat, tanpa, dan dengan perlakuan. Pengujian TGA menghasilkan KKS dan SR dengan perlakuan memiliki kestabilitas termal yang lebih baik dibandingkan KKS dan SR tanpa perlakuan. KKS dan SR dengan perlakuan memiliki kestabilan termal maksimal temperatur 377 0 C dan 399 0 C. Analisis DSC dari KKS dan SR dengan perlakuan memperlihatkan temperatur puncak pada 409 0 C dan 408 0 C. Stabilitas termal serat akan meningkat dengan perlakuan dibandingkan serat tanpa perlakuan. Kata kunci : Material insulasi termal, kayu kelapa sawit, serat rami, TGA, DSC Study of the thermal stability of raw materials for thermal insulation materials based on natural fibers: palm wood and ramie fiber

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“…The recent years, the application and research of natural-based and reused/recycled thermal insulation materials are growing. The most common natural raw materials for thermal insulation are flax, hemp, sheep wool, corn husk, cotton, coconut husk [8][9][10][11]. Some sustainable insulation reaches the thermal insulation performance [12], durability, usability, or mechanical properties of artificial insulations, but these properties usually not combined in one product [13].…”

Section: Research Motivationmentioning

confidence: 99%

Effect of drying method on compressive strength of straw-based thermal insulations

Fenyvesi¹,

Csanády²

2021

MST

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Most of the thermal insulations in the construction industry market based on fossil raw material or need a huge amount of production energy. Nowadays, sustainable thermal insulation products are more popular, and the demand for these products on the market is increasing. Some of them reach the main material properties of artificial ones but usually not all. Today the reaction to fire is another big challenge in this field. In many cases, producers use chemicals that can increase fire resistance, but on the other hand, increase the environmental impact of insulations too. It is also hard to find a binder which provides proper mechanical parameters and durability and is environmentally friendly too. During our scientific research on environmentally friendly thermal insulation materials, which is running for 4 years, we found that silicate-based adhesives meet many of these criteria mentioned above. In this article, the mechanical properties of straw-based insulation bonded with silicate binder were investigated. The effect of conventional and microwave drying on compressive strength were compared to found the optimal hardening process of binders. During the experiments, straw was applied in a natural state, natural stem length distribution and without microstructure and surface modification. The used binder is a simple silicate-based binder (potassium silicate) without any modification agent. Conventional drying needs a longer time, and during it, many cracks form in the early age of the hardened binder. It is because of shrinkage and the differences in the rigidity of the binder along its cross-section. Besides, the straw stems swell when exposed to moisture (from binder), and after drying they shrink, which decreases the quality of the bond between stems and binder. The microwave drying evenly heats the various points of the specimen, so it is not generated such big differences in shrinkage. The contact between stems and binder are also better. Due to these effects, the microwave dried specimens reached the limit required for step resistance, and they had three-time higher average compressive strength than we got by the conventional drying of the same raw material.

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Analysis of Thermal Insulation Building Materials Based on Natural Fibers

Cited by 55 publications

References 5 publications

Rendering Mortars Reinforced with Natural Sheep’s Wool Fibers

Rendering Mortars Reinforced with Natural Sheep’s Wool Fibers

Untitled

Effect of drying method on compressive strength of straw-based thermal insulations

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