The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Reza Mirzabeygi - One of the best experts on this subject based on the ideXlab platform.
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wood Wool cement board using mixture of eucalypt and poplar
Industrial Crops and Products, 2011Co-Authors: Alireza Ashori, Taghi Tabarsa, Khadijeh Azizi, Reza MirzabeygiAbstract:Abstract This study was carried out to explore the possibility of making cement-bonded wood–Wool composite building products using eucalypt (Eucalyptus camaldulensis) and poplar (Populus deltoides). The experimental design consisted of three treatments – ratio of wood–Wool mixture, percentage concentration of cement, and calcium chloride (CaCl2). The mechanical properties in terms of modulus of rupture (MOR), modulus of elasticity (MOE) and internal bond (IB) strength were investigated. The ratios of wood–Wool to cement were 40:60 and 60:40 by weight. The addition of the woody material to cement clearly reduced the maximum hydration temperature and increased the time to maximum temperature. Eucalypt was generally less compatible with cement than poplar wood. Test results showed that boards made with poplar wood–Wools had superior properties compared to the eucalypt and mixed wood–Wools. The presence of eucalypt in mixture of woody materials typically resulted in decrease in mechanical properties. It has been noted that a dose of 5% of CaCl2 by weight of cement can enhance the effect of cement. Application of Duncan's Multiple Range Test for the mean values of the results showed that the effects of all variables and their interactions on the mechanical properties in terms of MOR, MOE and IB were highly significant (p ≤ 0.01%). The mechanical properties of most produced boards were found to satisfy the minimum requirements of ISO standard.
Alireza Ashori - One of the best experts on this subject based on the ideXlab platform.
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wood Wool cement board using mixture of eucalypt and poplar
Industrial Crops and Products, 2011Co-Authors: Alireza Ashori, Taghi Tabarsa, Khadijeh Azizi, Reza MirzabeygiAbstract:Abstract This study was carried out to explore the possibility of making cement-bonded wood–Wool composite building products using eucalypt (Eucalyptus camaldulensis) and poplar (Populus deltoides). The experimental design consisted of three treatments – ratio of wood–Wool mixture, percentage concentration of cement, and calcium chloride (CaCl2). The mechanical properties in terms of modulus of rupture (MOR), modulus of elasticity (MOE) and internal bond (IB) strength were investigated. The ratios of wood–Wool to cement were 40:60 and 60:40 by weight. The addition of the woody material to cement clearly reduced the maximum hydration temperature and increased the time to maximum temperature. Eucalypt was generally less compatible with cement than poplar wood. Test results showed that boards made with poplar wood–Wools had superior properties compared to the eucalypt and mixed wood–Wools. The presence of eucalypt in mixture of woody materials typically resulted in decrease in mechanical properties. It has been noted that a dose of 5% of CaCl2 by weight of cement can enhance the effect of cement. Application of Duncan's Multiple Range Test for the mean values of the results showed that the effects of all variables and their interactions on the mechanical properties in terms of MOR, MOE and IB were highly significant (p ≤ 0.01%). The mechanical properties of most produced boards were found to satisfy the minimum requirements of ISO standard.
Timo Karki - One of the best experts on this subject based on the ideXlab platform.
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Environmental assessment of recycled mineral Wool and polypropylene utilized in wood polymer composites
Resources Conservation and Recycling, 2015Co-Authors: Olli Väntsi, Timo KarkiAbstract:Abstract Environmental performance is an important promotive factor in the future use of wood polymer composites. In this study, the environmental effects of replacing virgin glass fibers with recycled mineral Wool fibers, as well as replacing virgin polypropylene with recycled polypropylene are investigated. Furthermore, the environmental performance of two different end-of-life options for composite waste, incineration for energy use and landfill deposition is evaluated. The recycled mineral Wool was found to have better environmental performance compared to glass fiber in every impact category assessed. The utilization of recycled polypropylene proved to be advantageous in global warming potential and abiotic depletion categories. It was found that the end-of-life management of composite waste has an important role in the environmental performance of composites. Incineration of composite waste for energy use had better performance compared to landfill deposition in all the categories assessed, except for global warming potential. It is concluded that while the environmentally optimal recycling method for polypropylene waste must be evaluated case by case, recycled mineral Wool seems to provide an environmentally superior option to glass fiber in wood polymer composite applications where properties obtainable by the use of a mineral filler are required.
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utilization of recycled mineral Wool as filler in wood polypropylene composites
Construction and Building Materials, 2014Co-Authors: Olli Väntsi, Timo KarkiAbstract:Abstract The construction and demolition (C&D) industry is a major source of waste. Environmental regulations and laws have been implemented in many countries to improve and encourage the recycling of C&D waste. To meet tightened regulations, new C&D waste recycling methods must be developed. Mineral Wool is a waste fraction that is currently considered un-recyclable. In this study, the mechanical and moisture resistance properties of wood plastic composites utilizing recycled mineral Wool as filler are presented. According to the findings, the addition of recycled mineral Wool improved the moisture resistance properties of the composites noticeably, but a decrease in some mechanical properties was observed.
Pete Walke - One of the best experts on this subject based on the ideXlab platform.
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an experimental investigation into the comparative hygrothermal performance of wall panels incorporating wood fibre mineral Wool and hemp lime
Energy and Buildings, 2018Co-Authors: Eshra Latif, R M H Lawrence, Andrew Shea, Pete WalkeAbstract:Three wall panels of identical calculated U-value were simultaneously assessed in a large dual environmental chamber under a number of steady state and dynamic hygrothermal boundary conditions. This study used large-scale wall elements under identical controlled conditions in order to eliminate uncontrollable variables normally encountered in full-scale studies. The following panels were tested: Mineral Wool Panel, Wood Fibre Panel and the Biond Panel (an assembly of wood fibre and hemp-lime). Within the limits of the error range of the calculation, the measured U-value was same for all test panels when assessed under steady state and dynamic hygrothermal boundary conditions. It was however observed that in a boundary condition simulating intermittent heating, the Biond panel showed the highest heat storing and releasing capability whereas the Mineral Wool Panel showed the lowest. In terms of moisture management, the Biond panel exhibited the highest moisture dampening ability within the panel structure. Higher thermal and hygric inertia of the Biond panel may be useful in mitigating overheating of dwellings and reducing interstitial condensation.
L Coderch - One of the best experts on this subject based on the ideXlab platform.
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physicochemical aspects of the liposome Wool interaction in Wool dyeing
Langmuir, 2004Co-Authors: Meritxell Marti, Leonid I Barsukov, J Fonollosa, Jose Luis Parra, Stanislav V Sukhanov, L CoderchAbstract:Despite the promising application of liposomes in Wool dyeing, little is known about the mechanism of liposome interactions with the Wool fiber and dyestuffs. The kinetics of Wool dyeing by two dyes, Acid Green 27 (hydrophobic) and Acid Green 25 (hydrophilic), were compared in three experimental protocols: (1) without liposomes, (2) in the presence of phosphatidylcholine (PC) liposomes, and (3) with Wool previously treated with PC liposomes. Physicochemical interactions of liposomes with Wool fibers were studied under experimental dyeing conditions with particular interest in the liposome affinity to the fiber surface and changes in the lipid composition of the Wool fibers. The results obtained indicate that the presence of liposomes favors the retention of these two dyes in the dyeing bath, this effect being more pronounced in case of the hydrophobic dye. Furthermore, the liposome treatment is accompanied by substantial absorption of PC by Wool fibers with simultaneous partial solubilization of their polar lipids (more evident at higher temperatures). This may result in structural modification of the cell membrane complex of Wool fibers, which could account for a high level of the dye exhaustion observed at the end of the liposome dyeing process.
