Mechanical and thermal properties, and comparative life-cycle impacts, of stabilised earth building products

Narayanaswamy, Abhilash Holur; Walker, Peter; Reddy, B. V. Venkatarama; Heath, Andrew; Maskell, Daniel

doi:10.1016/j.conbuildmat.2020.118096

Cited by 34 publications

(15 citation statements)

References 23 publications

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“…Miranda et al [18] used two alkaline-activated floor mortars, and their results showed that a significant mechanical strength improvement was obtained in terms of the compression and shear behavior of the formulated materials. According to Narayanaswamy et al [19], alkali-activated compacted earth blocks appear to be very promising for reducing the global warming potential for the construction sector. Omar Sore et al [20] evaluated the feasibility of CEB stabilization with a geopolymer made from a mixture of metakaolin solution and sodium hydroxide.…”

Section: Introductionmentioning

confidence: 99%

Formulation of Compressed Earth Blocks Stabilized by Glass Waste Activated with NaOH Solution

et al. 2021

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Due to the increase in demand for building materials and their high prices in most developing countries, many researchers are trying to recycle waste for use as secondary raw materials. The aim of this study is the optimization of a mixture of compressed earth blocks based on two sediments. These sediments were tested through the Vicat test to determine the proportion of each one and the optimal water content. The mixtures were treated by adding 10% of blast furnace slag and different proportions of dissolved glass in a NaOH solution. The results indicated that the mixture of 70% Oran sediments with 30% Sidi Lakhdar sediments treated with 4% glass waste produced a CEB (compressed earth block) with high compressive strength with low porosity. In addition, formulated CEBs have a very good resistance to water immersion.

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Section: Introductionmentioning

confidence: 99%

Formulation of Compressed Earth Blocks Stabilized by Glass Waste Activated with NaOH Solution

et al. 2021

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“…Esta seleção resultou em uma base de dados composta por 35 publicações [1], [9], [10], [12] a [20], [23] a [27], [29], [30], [33], [34], [36], [37], [41], [43] a [50], [51] a [54]. As publicações foram classificadas segundo as seguintes informações: região geográfica na qual o ensaio foi realizado, classificação do solo (arenoso, siltoso ou argiloso), presença ou não de cimento (caso haja, o valor da porcentagem), forma de moldagem do componente construtivo, teor de umidade durante aplicação dos ensaios, tipo de ensaio térmico efetuado e propriedades físico-químicas e térmicas disponíveis (massa específica, condutividade térmica, calor específico, difusividade térmica e efusividade térmica).…”

Section: Metodologiaunclassified

Condutividade térmica do material construtivo solo-cimento: um estudo bibliométrico

Silva¹,

Milani²

2022

Xix Encontro Nacional De Tecnologia Do Ambiente Construído

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Os sistemas construtivos com terra carecem de normas brasileiras específicas para desempenho térmico. Logo, o objetivo foi realizar um estudo bibliométrico sobre a condutividade térmica do solo-cimento e as demais propriedades físicas que a afetam. Executou-se um levantamento de dados com foco em dois sistemas construtivos: blocos de terra comprimido (BTC) e taipa de pilão. Constatou-se um intervalo para condutividade térmica variando entre 0,7 a 1,1 (W/m.K). O parâmetro de engenharia que exerceu maior influência foi a forma de moldagem do material, que acarreta em mudanças da massa específica e da capacidade térmica do componente construtivo.

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“…Dynamic compaction alone or together with chemical instillation using several additives has been shown to considerable improve the mechanical performance of cement as stabilizer of compressed earth blocks (CEB) [4]. In contrast, compaction increases thermal conductivity [5]. If any additive is added to the CEB in order to improve or enhance particular characteristics, then the CEB are referred to as stabilized compressed earth blocks Many types of stabilizing agents are known [6], [7], although not much research appears to be available, the most tried ones are: cement, lime, gypsum and bitumen (mineral products), animal products, manufactured products and natural fibers (e.g., plant fibers).…”

Section: Introductionmentioning

confidence: 99%

Influence of Palm Oil Mesocarp Fibres on the Thermal Properties of Cement-Stabilized Compressed Earth–Based Brick

Nafu

Loic²,

Elvis³

et al. 2022

EJENG

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The harsh tropical climatic conditions and rapid deterioration of building strictly from soil have rendered one billion people in developing countries homeless. To alleviate this situation the effect of Palm oil mesocarp fibres was investigated on the thermal properties of cement-stabilized earth brick. Fibres were extracted and pretreated with warm distilled water at 100 °C diluted with 2% NaOH and oven dry at 105 °C for 24 hours. Sedimentary test, grain size, and elementary Analysis were conducted on the soil resulting in clayey soil which has a good insulation property. The soil was stabilized with 10% cement by mass reinforced with fibres. Nine different samples formulation of ten each were made with fibres content 0%, 0.25%, 0.5%, 0.75%, 1%, 1.25%, 1.5%, 2%, and 2.5% using a mold of size (100×100×50) mm and cured for 28 days. Thermal effusivity, volume calorific capacity, thermal conductivity, and thermal diffusivity of the samples were investigated using the tiny hot plate method and a computing algorithm estimation error. It resulted that the thermal effusivity, volume calorific capacity, thermal conductivity, and thermal diffusivity were 2.18242×103 J/M2K1/2 to 1.02716×103 J/M2K1/2, 2.64×106 J/M3K to 1.23×106 J/M3K, 1.81 W/mK to 0.82 W/Mk and 7.05×10-7 m2s-1 to 6.83×10-7 m2s-1 respectively with an optimal yield at 2.5% fibres concentration.

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Mechanical and thermal properties, and comparative life-cycle impacts, of stabilised earth building products

Cited by 34 publications

References 23 publications

Formulation of Compressed Earth Blocks Stabilized by Glass Waste Activated with NaOH Solution

Formulation of Compressed Earth Blocks Stabilized by Glass Waste Activated with NaOH Solution

Condutividade térmica do material construtivo solo-cimento: um estudo bibliométrico

Influence of Palm Oil Mesocarp Fibres on the Thermal Properties of Cement-Stabilized Compressed Earth–Based Brick

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