Published Date 1 July 2016, Vol.114:6–14,doi:10.1016/j.conbuildmat.2016.03.137
Title
Physical and mechanical properties of wood-gypsum composites from demolition material in rehabilitation works
Author
M.J. Morales-Conde a,,
C. Rodríguez-Liñán b
M.A. Pedreño-Rojas b
aInstituto Universitario de Arquitectura y Ciencias de la Construcción, Escuela Técnica Superior de Arquitectura, Universidad de Sevilla, Avenida Reina Mercedes, n 2, 41012 Sevilla, Spain
bDepartamento de Construcciones Arquitectónicas 1, Escuela Técnica Superior de Arquitectura, Universidad de Sevilla, Avenida Reina Mercedes, n 2, 41012 Sevilla, Spain
Received 17 December 2015. Revised 11 March 2016. Accepted 23 March 2016. Available online 29 March 2016.
Highlights
•
An experimental characterization of the physical and mechanical properties of wood-gypsum composites is shown.
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The additives used consisted of wood shavings and sawdust from wood waste mixed in various proportions.
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The results showed that increasing the amount of wood waste reduced density, Shore C hardness and thermal conductivity.
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In addition, the mechanical properties of the composite material were, in general, lower than in the reference samples.
Abstract
This paper presents the results of an experimental characterization of the physical and mechanical properties of wood-gypsum composites. The additives used consisted of wood shavings and sawdust from wood waste mixed in various proportions. The results showed that increasing the amount of wood waste reduced density and Shore C hardness. It was also observed that a rise in the percentage of wood waste slightly lowered thermal conductivity. This fall was more pronounced in the compounds containing wood shavings than in those with sawdust in the same proportion. In addition, the mechanical properties of the composite material were lower than in the reference samples. A 40% addition yielded a decrease in flexural strength of 61% for samples with sawdust (S40) and 65% for samples with wood shavings (WS40). Regarding mechanical resistance to compression, the compound with sawdust waste at 40% (S40) saw a reduction of 71% and 78% for the compound with wood shavings at 40% (WS40).
Published Date January 2016, Vol.60:84–107,doi:10.1016/j.ecolind.2015.06.020
Title
Biodiesel-TBL+: A new hierarchical sustainability assessment framework of PC&I for biodiesel production – Part I
Author
S. Bautista a,b,c,,,
P. Narvaez a,
M. Camargo b,
O. Chery b
L. Morel b
aGrupo de Procesos Químicos y Bioquímicos, Department of Chemical and Environmental Engineering, Universidad Nacional de Colombia, Cra 30 45-03, Bogotá, Colombia
bERPI (Equipe de Recherche des Processus Innovatifs), Nancy, France
cGrupo de Investigación en Agua y Desarrollo Sostenible, Department of Environmental Engineering, Universidad Central, Bogotá, Colombia
Received 25 March 2015. Revised 11 June 2015. Accepted 16 June 2015. Available online 9 July 2015.
Highlights
•
A new framework for the sustainability assessment of biodiesel is proposed.
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Politic and technologic dimensions are integrated to the sustainability assessment.
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The framework consists of dimensions, principles, criteria and indicators (PC&I).
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The PC&I proposed in this work can be potentially applied to specific contexts.
Abstract
Sustainability assessment of biodiesel production is a topic of increasing importance due to the interest of governments to define sovereignty strategies and diversification of their energy matrix, and to set up the impact of biofuels production. In this context, this work aims to propose a hierarchical structure of sustainability assessment that integrates dimensions of sustainable development with principles, criteria and indicators (PC&I). The method employed to define the hierarchical structure was a comprehensive literature review, based on information search strategy and classification. About 400 documents were reviewed and 103 documents were ultimately selected, including laws, policy documents, certificates, directives and other normative documents and papers published in peer-reviewed journals. The first result of the analysis was the need to strengthen identification of the sustainable development assessment, adding the political and technological dimensions to the three traditional dimensions, social, economic and environmental, studied in this kind of evaluation. The second result was the proposal of a hierarchical framework for the sustainability assessment of biodiesel production, organized in four levels: the first level comprises the five dimensions associated with sustainable development evaluation, the second includes 13 principles, the third contains 40 criteria and the fourth level corresponds to a set of indicators that describes each criterion. Outcomes of this work provide a foundation for further discussion of sustainability assessments for biodiesel production and its potential application in specific contexts.
Published Date November 2011, Vol.19(10):2151–2168,doi:10.1016/j.simpat.2011.06.006 Title A system dynamics analysis of food supply chains – Case study with non-perishable products Author
Sameer Kumar,
Anvar Nigmatullin
Opus College of Business, University of St. Thomas, 1000 LaSalle Avenue, Minneapolis, MN 55403-2005, USA
Received 4 July 2010. Revised 21 June 2011. Accepted 29 June 2011. Available online 5 August 2011.
Abstract
The purpose of this study is to examine the non-perishable product food supply chain performance under a monopolistic environment. A system dynamics approach was used to study the behavior and relationships within a supply chain for a non-perishable product, and to determine the impact of demand variability and lead-time on supply chain performance. The proposed model facilitates identification and study of the critical components of the overall supply chain, allowing for the creation of an efficient and sustainable supply chain network. The modeling also provides a tool to generate multiple business situations for effective strategic planning and business decision-making.
Highlights
► Quantifies impact of demand variability and lead time on performance of a food supply chain. ► Modeling generates multiple business situations for improved supply chain configuration. ► Proposed framework illustrates potential of system dynamics in supply chain design.
