Thermophysical properties of stabilised soil building blocks

Adam, Erwan; Jones, Paul

doi:10.1016/0360-1323(94)00041-p

Cited by 83 publications

(29 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…With regards to unfired earth construction, Heath et al [6] have recently shown that there is structural potential for utilizing commercially manufactured unfired bricks but concluded that additional research needs to be carried out into structural behaviour and methods for minimizing moisture susceptibility. This project therefore examines an innovative, sustainable, natural earth product to assess its initial performance against an extensive series of mechanical and analytical laboratory tests [7].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic, Molecular and Mechanical Testing Diagnostics in Natural Fibre Reinforced, Polymer-Stabilized Earth Blocks

Galán-Marín

Rivera-Gómez

Bradley

2013

International Journal of Polymer Science

View full text Add to dashboard Cite

The aim of this research study was to evaluate the influence of utilising natural polymers as a form of soil stabilization, in order to assess their potential for use in building applications. Mixtures were stabilized with a natural polymer (alginate) and reinforced with wool fibres in order to improve the overall compressive and flexural strength of a series of composite materials. Ultrasonic pulse velocity (UPV) and mechanical strength testing techniques were then used to measure the porous properties of the manufactured natural polymer-soil composites, which were formed into earth blocks. Mechanical tests were carried out for three different clays which showed that the polymer increased the mechanical resistance of the samples to varying degrees, depending on the plasticity index of each soil. Variation in soil grain size distributions and Atterberg limits were assessed and chemical compositions were studied and compared. X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), and energy dispersive X-ray fluorescence (EDXRF) techniques were all used in conjunction with qualitative identification of the aggregates. Ultrasonic wave propagation was found to be a useful technique for assisting in the determination of soil shrinkage characteristics and fibre-soil adherence capacity and UPV results correlated well with the measured mechanical properties.

show abstract

Section: Introductionmentioning

confidence: 99%

Ultrasonic, Molecular and Mechanical Testing Diagnostics in Natural Fibre Reinforced, Polymer-Stabilized Earth Blocks

Galán-Marín

Rivera-Gómez

Bradley

2013

International Journal of Polymer Science

View full text Add to dashboard Cite

show abstract

“…Their very low environmental impact is thanks to the little energy needed during the building stage and the thorough recyclability of almost all of their building materials, which are often completely natural and compatible [5]. In addition, raw-earth constructions perform well thermally [11][12][13][14][15][16][17]; allowing the buildings good thermal insulation capacities and thermo-hygrometric comfort of the indoor environments, including sound insulation [18]. In this way, raw-earth constructions have been encouraged during recent years, especially in those countries where they could be an easily accessible and economically attractive resource due to the climatic and economic conditions, , joining well to the local traditional architecture.…”

Section: Introductionmentioning

confidence: 99%

Cob Construction in Italy: Some Lessons from the Past

et al. 2010

View full text Add to dashboard Cite

Raw earth is a construction material unknown to most people. Nowadays, raw-earth constructions are an area of growing interest, both for rescuing the heritage and for a rediscovered environmentally friendly building and eco-sustainability material. However, because raw-earth constructions are a forgotten technique, we find problems of a lack of skilled people at all levels in this area, from designers to masons, as well as problems of how to carry out compatible conservation works on earthen heritage. This paper tries to fill the gap for a peculiar historic earthen building technology, namely cob (or bauge), which is present in Macerata in the center of Italy. Results are presented on regaining possession of the material and constructional aspects and their initial structural resources, and guidelines are given on how to improve the manufacturing process to reuse the cob technique for construction and for how to accurately work on it for a compatible and sustainable conservation.

show abstract

“…for specific heat of conventional block and ceramic tiles with 1,000 to 2,000 kg m −3 variable density (Table 12). For chemically stabilized raw soil blocks (lime and cement) made from soils with similar characteristics to those studied here, Adam and Jones (1995) . Therefore, inverted relation between thermal conductivity and block density is noticed.…”

Section: Physical and Mechanical Propertiesmentioning

confidence: 99%

Mechanical and thermal behaviors of stabilized compressed earth blocks

Ferreira

Ulhôa

2016

Cieng

View full text Add to dashboard Cite

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.

show abstract

Thermophysical properties of stabilised soil building blocks

Cited by 83 publications

References 1 publication

Ultrasonic, Molecular and Mechanical Testing Diagnostics in Natural Fibre Reinforced, Polymer-Stabilized Earth Blocks

Ultrasonic, Molecular and Mechanical Testing Diagnostics in Natural Fibre Reinforced, Polymer-Stabilized Earth Blocks

Cob Construction in Italy: Some Lessons from the Past

Mechanical and thermal behaviors of stabilized compressed earth blocks

Contact Info

Product

Resources

About