The Experts below are selected from a list of 287895 Experts worldwide ranked by ideXlab platform
Domenico Gallipoli - One of the best experts on this subject based on the ideXlab platform.
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advances in the use of biological stabilisers and hyper compaction for sustainable earthen Construction Materials
Reddy B. V. Venkatarama & Mani Monto & Walker Pete (Eds.). (2019). Earthen dwellings and structures. Singapore: Springer pp. 191-201 Springer transact, 2019Co-Authors: Sravan Muguda, P N Hughes, Celine Perlot, Agostino Walter Bruno, Charles E. Augarde, George Lucas, Alessia Cuccurullo, Domenico GallipoliAbstract:In the majority of cases, earthen Construction Materials for real buildings require amendment to deliver suitable material properties, which could be some additional strength or resilience to erosion. In modern earthen Construction, in India, Australia and other parts of the world, cement and lime have been successfully used as stabilisers, providing both strength and durability benefits. However, the use of cement is detrimental to the green credentials of earthen Construction Materials, due to the large carbon footprint of that material’s manufacture and, for some time, researchers have been motivated to find more appropriate stabilisers and manufacturing methods. In this paper, we present recent findings from two projects that are linked by this motivation and involve the study of bio-based stabilisers and alternative manufacturing methods for in situ and unit-based Materials. Results are presented from laboratory testing of strength and durability of a range of Materials, bio-stabilisers and manufacturing processes, indicating that there could be viable alternatives to cement and lime, certainly for many current uses of earthen Construction Materials.
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mechanical properties of biopolymer stabilised soil based Construction Materials
Geotechnique Letters, 2017Co-Authors: Sravan Muguda, Samuel John Booth, P N Hughes, Celine Perlot, Agostino Walter Bruno, Charles E. Augarde, Domenico GallipoliAbstract:Soil-based Construction Materials are of interest as structural building Materials due to their green credentials, as well as being present in many historical structures. For effective conservation of the latter, and to motivate greater uptake for new Construction, understanding of the mechanical and hydraulic properties of these Materials is in need of improvement. Earthen Construction Materials can be considered to be manufactured unsaturated soils, and advances in understanding can be made by considering them from a geotechnical point of view. This paper presents initial results from a major programme of testing, seeking improved properties for earthen Construction Materials, where unusual organic compounds have been employed as stabilisers. Two gums (guar and xanthan) used as stabilisers for a soil mixture are shown to have significant effects on certain mechanical properties, some of which can be explained, and other aspects which are in need of further investigation.
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mechanical properties of biopolymer stabilised soil based Construction Materials
Geotechnique Letters, 2017Co-Authors: Sravan Muguda, Samuel John Booth, P N Hughes, Celine Perlot, Agostino Walter Bruno, Charles E. Augarde, Domenico GallipoliAbstract:Soil-based Construction Materials are of interest as structural building Materials due to their green credentials, as well as being present in many historical structures. For effective conservation of the latter, and to motivate greater uptake for new Construction, understanding of the mechanical and hydraulic properties of these Materials is in need of improvement. Earthen Construction Materials can be considered to be manufactured unsaturated soils, and advances in understanding can be made by considering them from a geotechnical point of view. This paper presents initial results from a major programme of testing, seeking improved properties for earthen Construction Materials, where unusual organic compounds have been employed as stabilisers. Two gums (guar and xanthan) used as stabilisers for a soil mixture are shown to have significant effects on certain mechanical properties, some of which can be explained, and other aspects which are in need of further investigation.
Sravan Muguda - One of the best experts on this subject based on the ideXlab platform.
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advances in the use of biological stabilisers and hyper compaction for sustainable earthen Construction Materials
Reddy B. V. Venkatarama & Mani Monto & Walker Pete (Eds.). (2019). Earthen dwellings and structures. Singapore: Springer pp. 191-201 Springer transact, 2019Co-Authors: Sravan Muguda, P N Hughes, Celine Perlot, Agostino Walter Bruno, Charles E. Augarde, George Lucas, Alessia Cuccurullo, Domenico GallipoliAbstract:In the majority of cases, earthen Construction Materials for real buildings require amendment to deliver suitable material properties, which could be some additional strength or resilience to erosion. In modern earthen Construction, in India, Australia and other parts of the world, cement and lime have been successfully used as stabilisers, providing both strength and durability benefits. However, the use of cement is detrimental to the green credentials of earthen Construction Materials, due to the large carbon footprint of that material’s manufacture and, for some time, researchers have been motivated to find more appropriate stabilisers and manufacturing methods. In this paper, we present recent findings from two projects that are linked by this motivation and involve the study of bio-based stabilisers and alternative manufacturing methods for in situ and unit-based Materials. Results are presented from laboratory testing of strength and durability of a range of Materials, bio-stabilisers and manufacturing processes, indicating that there could be viable alternatives to cement and lime, certainly for many current uses of earthen Construction Materials.
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mechanical properties of biopolymer stabilised soil based Construction Materials
Geotechnique Letters, 2017Co-Authors: Sravan Muguda, Samuel John Booth, P N Hughes, Celine Perlot, Agostino Walter Bruno, Charles E. Augarde, Domenico GallipoliAbstract:Soil-based Construction Materials are of interest as structural building Materials due to their green credentials, as well as being present in many historical structures. For effective conservation of the latter, and to motivate greater uptake for new Construction, understanding of the mechanical and hydraulic properties of these Materials is in need of improvement. Earthen Construction Materials can be considered to be manufactured unsaturated soils, and advances in understanding can be made by considering them from a geotechnical point of view. This paper presents initial results from a major programme of testing, seeking improved properties for earthen Construction Materials, where unusual organic compounds have been employed as stabilisers. Two gums (guar and xanthan) used as stabilisers for a soil mixture are shown to have significant effects on certain mechanical properties, some of which can be explained, and other aspects which are in need of further investigation.
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mechanical properties of biopolymer stabilised soil based Construction Materials
Geotechnique Letters, 2017Co-Authors: Sravan Muguda, Samuel John Booth, P N Hughes, Celine Perlot, Agostino Walter Bruno, Charles E. Augarde, Domenico GallipoliAbstract:Soil-based Construction Materials are of interest as structural building Materials due to their green credentials, as well as being present in many historical structures. For effective conservation of the latter, and to motivate greater uptake for new Construction, understanding of the mechanical and hydraulic properties of these Materials is in need of improvement. Earthen Construction Materials can be considered to be manufactured unsaturated soils, and advances in understanding can be made by considering them from a geotechnical point of view. This paper presents initial results from a major programme of testing, seeking improved properties for earthen Construction Materials, where unusual organic compounds have been employed as stabilisers. Two gums (guar and xanthan) used as stabilisers for a soil mixture are shown to have significant effects on certain mechanical properties, some of which can be explained, and other aspects which are in need of further investigation.
Mitchell Jones - One of the best experts on this subject based on the ideXlab platform.
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engineered mycelium composite Construction Materials from fungal biorefineries a critical review
Materials & Design, 2020Co-Authors: Mitchell Jones, Andreas Mautner, Stefano Luenco, Alexander Bismarck, Sabu JohnAbstract:Abstract Mycelium composites are an emerging class of cheap and environmentally sustainable Materials experiencing increasing research interest and commercialisation in the EU and USA for Construction applications. These Materials utilise natural fungal growth as a low energy bio-fabrication method to upcycle abundant agricultural by-products and wastes into more sustainable alternatives to energy intensive synthetic Construction Materials. Mycelium composites have customisable material properties based on their composition and manufacturing process and can replace foams, timber and plastics for applications, such as insulation, door cores, panelling, flooring, cabinetry and other furnishings. Due to their low thermal conductivity, high acoustic absorption and fire safety properties outperforming traditional Construction Materials, such as synthetic foams and engineered woods, they show particular promise as thermal and acoustic insulation foams. However, limitations stemming from their typically foam-like mechanical properties, high water absorption and many gaps in material property documentation necessitate the use of mycelium composites as non- or semi-structural supplements to traditional Construction Materials for specific, suitable applications, including insulation, panelling and furnishings. Nonetheless, useful material properties in addition to the low costs, simplicity of manufacture and environmental sustainability of these Materials suggest that they will play a significant role in the future of green Construction.
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waste derived low cost mycelium composite Construction Materials with improved fire safety
Fire and Materials, 2018Co-Authors: Everson Kandare, Mitchell Jones, T Bhat, Tien Huynh, Richard K K Yuen, Chun H Wang, Sabu JohnAbstract:Mycelial growth attracts academic and commercial interest because of its ability to upcycle agricultural and industrial wastes into economical and environmentally sustainable composite Materials using a natural, low-energy manufacturing process able to sequester carbon. This study aims to characterise the effect of varying ratios of high silica agricultural and industrial wastes on the flammability of mycelium composites, relative to typical synthetic Construction Materials. The results reveal that mycelium composites are safer than the traditional Construction Materials considered, producing much lower average and peak heat release rates and longer time to flashover. They also release significantly less smoke and CO2, although CO production fluctuated. Rice hulls yielded significant char and silica ash which improved fire performance, but composites containing glass fines exhibited the best fire performance because of their significantly higher silica concentrations and low combustible material content. Higher concentrations of glass fines increased volume-specific cost but reduced mass-specific and density-specific costs. The findings of this study show that mycelium composites are a very economical alternative to highly flammable petroleum-derived and natural gas-derived synthetic polymers and engineered woods for applications including insulation, furniture, and panelling.
Sabu John - One of the best experts on this subject based on the ideXlab platform.
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engineered mycelium composite Construction Materials from fungal biorefineries a critical review
Materials & Design, 2020Co-Authors: Mitchell Jones, Andreas Mautner, Stefano Luenco, Alexander Bismarck, Sabu JohnAbstract:Abstract Mycelium composites are an emerging class of cheap and environmentally sustainable Materials experiencing increasing research interest and commercialisation in the EU and USA for Construction applications. These Materials utilise natural fungal growth as a low energy bio-fabrication method to upcycle abundant agricultural by-products and wastes into more sustainable alternatives to energy intensive synthetic Construction Materials. Mycelium composites have customisable material properties based on their composition and manufacturing process and can replace foams, timber and plastics for applications, such as insulation, door cores, panelling, flooring, cabinetry and other furnishings. Due to their low thermal conductivity, high acoustic absorption and fire safety properties outperforming traditional Construction Materials, such as synthetic foams and engineered woods, they show particular promise as thermal and acoustic insulation foams. However, limitations stemming from their typically foam-like mechanical properties, high water absorption and many gaps in material property documentation necessitate the use of mycelium composites as non- or semi-structural supplements to traditional Construction Materials for specific, suitable applications, including insulation, panelling and furnishings. Nonetheless, useful material properties in addition to the low costs, simplicity of manufacture and environmental sustainability of these Materials suggest that they will play a significant role in the future of green Construction.
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waste derived low cost mycelium composite Construction Materials with improved fire safety
Fire and Materials, 2018Co-Authors: Everson Kandare, Mitchell Jones, T Bhat, Tien Huynh, Richard K K Yuen, Chun H Wang, Sabu JohnAbstract:Mycelial growth attracts academic and commercial interest because of its ability to upcycle agricultural and industrial wastes into economical and environmentally sustainable composite Materials using a natural, low-energy manufacturing process able to sequester carbon. This study aims to characterise the effect of varying ratios of high silica agricultural and industrial wastes on the flammability of mycelium composites, relative to typical synthetic Construction Materials. The results reveal that mycelium composites are safer than the traditional Construction Materials considered, producing much lower average and peak heat release rates and longer time to flashover. They also release significantly less smoke and CO2, although CO production fluctuated. Rice hulls yielded significant char and silica ash which improved fire performance, but composites containing glass fines exhibited the best fire performance because of their significantly higher silica concentrations and low combustible material content. Higher concentrations of glass fines increased volume-specific cost but reduced mass-specific and density-specific costs. The findings of this study show that mycelium composites are a very economical alternative to highly flammable petroleum-derived and natural gas-derived synthetic polymers and engineered woods for applications including insulation, furniture, and panelling.
Niels J Jerrum - One of the best experts on this subject based on the ideXlab platform.
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corrosion behavior of Construction Materials for intermediate temperature steam electrolysers
Advanced Materials Research, 2013Co-Authors: Aleksey Valerievich Nikiforov, Irina Petrushina, Jens Oluf Jense, Niels J JerrumAbstract:Different corrosion resistant stainless steels, nickel-based alloys, pure nickel, Ta-coated stainless steel (AISI 316L), niobium, platinum and gold rods were evaluated as possible Materials for use in the intermediate temperature (200-400 °C) acidic water electrolysers. The corrosion resistance was measured under simulated conditions (molten KH2PO4) corresponding to the proton-conducting solid acids or transition metal phosphates as electrolytes. It was shown that, unlike at temperatures below 200 °C, gold is unstable with respect to corrosion in molten KH2PO4. Platinum demonstrated high corrosion resistance and the anodic and cathodic limits were for the first time found for the electrolyte. Nickel, niobium, Inconel®625, Hastelloy®C-276 and Ta-coated stainless steel (AISI 316L) demonstrated high corrosion stability and can be recommended as Construction Materials for bipolar plates.
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corrosion behaviour of Construction Materials for high temperature steam electrolysers
International Journal of Hydrogen Energy, 2011Co-Authors: Aleksey Valerievich Nikiforov, Erik Christense, A L Tomasgarcia, Irina Petrushina, Niels J JerrumAbstract:Abstract Different types of commercially available stainless steels, Ni-based alloys as well as titanium and tantalum were evaluated as possible metallic bipolar plates and Construction Materials. The corrosion resistance was measured under simulated conditions corresponding to the conditions in high temperature proton exchange membrane (PEM) steam electrolysers. Steady-state voltammetry was used in combination with scanning electron microscopy and energy-dispersive X-ray spectroscopy to evaluate the stability of the mentioned Materials. It was found that stainless steels were the least resistant to corrosion under strong anodic polarisation. Among alloys, Ni-based showed the highest corrosion resistance in the simulated PEM electrolyser medium. In particular, Inconel® 625 was the most promising among the tested corrosion-resistant alloys for the anodic compartment in high temperature steam electrolysis. Tantalum showed outstanding resistance to corrosion in selected media. On the contrary, passivation of titanium was weak, and the highest rate of corrosion among all tested Materials was observed for titanium at 120 °C.