Thermal and mechanical properties of gypsum–cement foam concrete: effects of surfactant

Samson, Gabriel; Phelipot-Mardelé, Annabelle; Lanos, Christophe

doi:10.1080/19648189.2016.1177601

Cited by 24 publications

(21 citation statements)

References 12 publications

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“…The thermal performance of porous materials has been investigated since the last decade by [ 204 , 205 , 206 , 207 ]. The effect of pozzolan, density, foamer content, aggregate mineralogy and microstructural factors on conductivity are the scope of [ 208 ].…”

Section: Properties Of Frfcmentioning

confidence: 99%

Fibre-Reinforced Foamed Concretes: A Review

et al. 2020

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Foamed concrete (FC) is a high-quality building material with densities from 300 to 1850 kg/m3, which can have potential use in civil engineering, both as insulation from heat and sound, and for load-bearing structures. However, due to the nature of the cement material and its high porosity, FC is very weak in withstanding tensile loads; therefore, it often cracks in a plastic state, during shrinkage while drying, and also in a solid state. This paper is the first comprehensive review of the use of man-made and natural fibres to produce fibre-reinforced foamed concrete (FRFC). For this purpose, various foaming agents, fibres and other components that can serve as a basis for FRFC are reviewed and discussed in detail. Several factors have been found to affect the mechanical properties of FRFC, namely: fresh and hardened densities, particle size distribution, percentage of pozzolanic material used and volume of chemical foam agent. It was found that the rheological properties of the FRFC mix are influenced by the properties of both fibres and foam; therefore, it is necessary to apply an additional dosage of a foam agent to enhance the adhesion and cohesion between the foam agent and the cementitious filler in comparison with materials without fibres. Various types of fibres allow the reduction of by autogenous shrinkage a factor of 1.2–1.8 and drying shrinkage by a factor of 1.3–1.8. Incorporation of fibres leads to only a slight increase in the compressive strength of foamed concrete; however, it can significantly improve the flexural strength (up to 4 times), tensile strength (up to 3 times) and impact strength (up to 6 times). At the same time, the addition of fibres leads to practically no change in the heat and sound insulation characteristics of foamed concrete and this is basically depended on the type of fibres used such as Nylon and aramid fibres. Thus, FRFC having the presented set of properties has applications in various areas of construction, both in the construction of load-bearing and enclosing structures.

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Section: Properties Of Frfcmentioning

confidence: 99%

Fibre-Reinforced Foamed Concretes: A Review

et al. 2020

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“…11 Mechanically foamed gypsum materials usually have poor mechanical properties 12,13 and are mostly used as soundabsorbing materials. Nevertheless, Samson et al 14 found that material with better mechanical properties (up to 2 MPa) can be made with the proper choice of SAS.…”

Section: Introductionmentioning

confidence: 99%

Environmentally friendly lightweight gypsum-based materials with waste stone dust

Krejsová

Heralová

Doleželová

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part L:

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Gypsum is one of the most environmentally friendly binders and consequently its importance in building industry is increasing. New applications are being sought and new materials are being developed. A lightweight gypsum material foamed by waste stone dust was designed and tested. The amount of stone dust, a waste product formed during the cutting and polishing of decorative stones, is becoming serious problem in some countries. When the stone dust contains calcium carbonate, it can be used for gypsum foaming to produce cheap, environmentally attractive material. The physical and mechanical properties of lightweight gypsum-based materials with different amounts of stone dust were designed and tested. The material with largest amount of waste stone dust attained a bulk density under 600 kg/m 3 and compressive strength of 1.1 MPa, with a thermal conductivity of 0.117 W/m.K. These properties are sufficient for use of the material as a thermal insulating plaster, as the core of thermal insulating gypsum boards or in lightweight blocks for inner walls and partitions. Life cycle cost analyses was performed for the most favourable material and was compared with aerated autoclaved concrete, which is a common commercial product with similar properties.

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“…The figure clearly indicates that the prepared FAAG in this study is capable of achieving either lower thermal conductivity or higher compressive strength than other existing foamed products. For instance, the FAAG developed in this study outperformed the cement-gypsum binders (Samson et al, 2017), the contaminated dredged river sediment foamed concrete (Yang et al, 2020) and the magnesium phosphate cement-based foamed concrete (Li et al, 2019) in terms of the strength (Figure 11). At the same time, the FAAG also presents slightly higher thermal conductivity but greater strength than some foamed products such as black dustbased autoclaved aerated concrete (Maneewan et al, 2019) and fly-ash based foamed geopolymer (Feng et al, 2015).…”

Section: Thermal Conductivitymentioning

confidence: 85%

Waste Glass Reuse in Foamed Alkali-Activated Binders Production: Technical and Environmental Assessment

et al. 2020

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Waste glass is a type of construction and demolition waste, which carries significant environmental burdens and can be recycled. In this study, a foamed alkali-activated glass (FAAG) via the use of milled waste glass was synthesized in low-temperature (i.e., 80°C). The influence of foaming agent (i.e., aluminum powder) content on the foaming process of samples was investigated and optimized in view of their performance. The optimum mix formulation, which is FAAG with 10% aluminum powder was then selected, and followed by the measurement of the water-resistance and absorption, impact resistance and thermal conductivity of the prepared FAAG. X-ray diffraction was also involved to identify the phase formation within the samples. Finally, the environmental impacts related to the preparation of 1 kg FAAG were obtained. Results shows that a type of more sustainable FAAG compared with the commercial product was successfully developed in low-temperature, revealing the low thermal conductivity of ∼0.13 W/(mK) with a density of ∼0.59 g/cm 3 and compressive strength of ∼5.52 MPa, which is 97% higher than the commercial product. Meanwhile, in addition to a foaming agent, aluminum powder is also acting as a key component in the geopolymerization of samples, facilitating the formation of aluminosilicate that provides strength.

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Thermal and mechanical properties of gypsum–cement foam concrete: effects of surfactant

Cited by 24 publications

References 12 publications

Fibre-Reinforced Foamed Concretes: A Review

Fibre-Reinforced Foamed Concretes: A Review

Environmentally friendly lightweight gypsum-based materials with waste stone dust

Waste Glass Reuse in Foamed Alkali-Activated Binders Production: Technical and Environmental Assessment

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