Optimum lime content identification for lime-stabilised rammed earth

Ciancio, Daniela; Beckett, Chris; Carraro, J. Antônio H.

doi:10.1016/j.conbuildmat.2013.11.077

Cited by 152 publications

(57 citation statements)

References 20 publications

(1 reference statement)

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“…Specimens were tested at 28 days immediately after removal from the curing environment, pre venting re-equilibration to atmospheric conditions. This step was taken to ensure suction similarity between specimens; although usually not considered a pertinent factor governing the strength of cement-stabilised RE, suction was demonstrated to be a key contributor to strength in unstabilised and lime-stabilised RE [19,20]. Hence, suction equilibration was necessary to compare mix performance across stabilisers.…”

Section: Unconfined Compressive Strengthmentioning

confidence: 99%

Life cycle analysis of environmental impact vs. durability of stabilised rammed earth

Arrigoni

Beckett

Ciancio

et al. 2017

Construction and Building Materials

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Rammed earth (RE) has enjoyed a revival in recent decades due to the increasing awareness of environmental issues surrounding the building industry. Although RE in its traditional form is deemed a highly environmentally-friendly material, the same cannot be said for its modern stabilised counterpart. Comprehensive experimental procedures exist to estimate mechanical strength properties of stabilised RE (SRE). However, tests for material durability are far less common. Engineers and practitioners therefore assume that strength and durability are interchangeable properties, i.e. the stronger the material, the more durable. Inflated strengths are recommended to ensure adequate durability, leading to high environmental costs through excessive use of stabilisers. This paper rates the relevance of two acknowledged durability tests (accelerated erosion due to sprayed water and mass loss due to wire brushing) and relates outcomes to the strength and the environmental impact of several SRE mixes. The environmental impact of each mix was estimated using attributional and consequential life cycle assessment (LCA) approaches as well as an assessment of cumulative energy demand. Results demonstrated that it is possible to have durable SRE mixes without paying the cost of using environmentally-expensive stabilisers

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Section: Unconfined Compressive Strengthmentioning

confidence: 99%

Life cycle analysis of environmental impact vs. durability of stabilised rammed earth

Arrigoni

Beckett

Ciancio

et al. 2017

Construction and Building Materials

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“…Lime, cement and bitumen are commonly used additives for stabilization of expansive soils [1][2][3]. Recently, different additive materials such as fly ash, rice husk ash, silica fume, ladle furnace slag and geo fibers are used to improve some geotechnical properties of poor soils [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Marble Dust for Soil Stabilization

Yilmaz

Yurdakul

2017

Acta Phys. Pol. A

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Usage of marble dust was investigated for soil stabilization in the scope of utilization of waste material. Geotechnical properties, such as compaction, Atterberg limits, unconfined compressive strength of the mixtures and changes of these properties with the marble dust ratio were determined. From the test results it is seen that marble dust increases the mechanical properties of soil and application of dust wastes for soil stabilization will be an efficient practice in terms of solid waste management.

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“…Even though Portland cement is more used and researched regarding soil stabilization as constructing material, currently, other alternatives, as lime have been researched (RAHEEM et al, 2010;DEBOUCHA;HASHIM, 2011;OTI, KINUTHIA, 2012;CIANCIO;BECKETT;CARRARO, 2014;NAGARAJ et al, 2014). Either cement or lime have noticeable distinctions on their active mechanisms and choices depend on which soil type will be stabilized.…”

Section: -Introductionmentioning

confidence: 99%

Mechanical and thermal behaviors of stabilized compressed earth blocks

Ferreira

Ulhôa

2016

Cieng

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The effect of lime and Portland cement associated to sodium silicate (Na2SiO3) on the mechanical and thermal behavior of compressed earth blocks was analyzed. Mini panels were molded and their mechanical and thermal properties were determined in laboratory. For such, sandy and clayey soils were added with Portland cement and lime at 6% and 10% contents, and sodium silicate at dosage of 4%. The compressed earth blocks were cured in a humidity chamber for seven, 28, 56 and 91 days. At the ages of 28, 56 and 91 days the specimens were submitted to the compressive test and water absorption tests at seven days. The thermal conductivity was obtained by the guarded hot plate method and the specific heat value by the calorimeter method. Afterwards, the main thermophysical properties were calculated and analyzed by means of walls thermal behaviors. The best compressive strength and water absorption capacity results were reached by the sandy soil with addition of Portland cement or lime at 10% content, both added of sodium silicate. Regarding to the thermal behavior, the results pointed out that the stabilized compressed earth blocks reached the best thermal behavior when compared to the conventional ones under the same use conditions. Keywords: Stabilized earth, Soil-cement, Mechanical properties, Thermophysical properties. RESUMOFoi analisado o efeito da adição de cimento e cal associados ao silicato de sódio (Na2SiO3) sobre o comportamento mecânico e térmico de tijolos prensados de terra crua. Mini painéis foram moldados e suas propriedades mecânicas e térmicas foram determinadas em laboratório. Para tal, cimento Portland e cal, nas dosagens de 6% e 10% e silicato de sódio, na dosagem de 4% foram adicionados a dois tipos de solos, um arenoso e outro argiloso. Os tijolos foram curados em câmara úmida por sete, 28, 56 e 91 dias. Os ensaios de compressão simples foram realizados nas idades de 28, 56 e 91 dias e os de absorção de água aos sete dias. A condutividade térmica foi obtida pelo método da placa quente e o calor específico foi determinado por calorímetro. As principais propriedades termofísicas foram calculadas e analisadas por meio do comportamento térmico de paredes. Os melhores resultados em termos de compressão simples e absorção de água foram alcançados pela mistura solo arenoso e cimento ou cal na dosagem de 10% associados ao silicato de sódio. Os resultados apontaram que os tijolos prensados de terra crua alcançaram melhor comportamento térmico comparados aos tijolos cerâmicos convencionais.

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Optimum lime content identification for lime-stabilised rammed earth

Cited by 152 publications

References 20 publications

Life cycle analysis of environmental impact vs. durability of stabilised rammed earth

Life cycle analysis of environmental impact vs. durability of stabilised rammed earth

Evaluation of Marble Dust for Soil Stabilization

Mechanical and thermal behaviors of stabilized compressed earth blocks

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