Examinando por Autor "Melane Lavado, Alberto"

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Characterization of Three Types of Recycled Aggregates from Different Construction and DemolitionWaste: An Experimental Study forWaste Management
(MDPI, 2023-02-19) Saiz Martinez , Pablo; Ferrández Vega, Daniel; Melane Lavado, Alberto; Zaragoza Benzal, Alicia
Achieving sustainable management and efficient use of natural resources stands out as one of the goals included in the Goals for Sustainable Development in the 2030 Agenda. The construction sector is currently far from presenting an efficient model in terms of treating waste generated by it. Variations in the physical and chemical properties of recycled aggregates coming from construction and demolition waste are one of the main reasons of their limited use in the production of construction materials. This research presents a physicochemical characterization of three different types of recycled aggregates coming from different types of waste: concrete, ceramic and mixed. Physical characterization shows that recycled concrete aggregate has better physical properties compared with mixed recycled aggregate and ceramic recycled aggregate, which makes it more suitable for use in masonry mortars and concrete, due to its higher dry density (2210.33 kg/m3), its lower content of fines (5.17%), its lower friability coefficient (24.60%), and its water absorption coefficient (6.70%). Chemical characterization shows that none of the tested recycled aggregates contains traces of harmful chemical agents that exceed the limits established by the reference regulations. Finally, the statistical analysis shows good homogeneity for these raw materials, obtaining low coefficients of variation and values within the recommended in each of the calculated confidence intervals.
Different Ways to Access Knowledge for Sustainability-Oriented Innovation. The Effect of Foreign Direct Investment
(MDPI, 2018-11-14) Melane Lavado, Alberto; Álvarez Herranz, Agustín
Sustainability-oriented innovation (SOI), which displays an intention to develop a product or service that contributes to economic, environmental, and social sustainability, has drawn growing institutional and academic attention, due to the general consideration that innovation is an essential part of achieving sustainability. For developments of this nature, it is considered that foreign direct investment (FDI) helps companies to meet the requirements demanded by SOI, however, they show different cooperation patterns, and so it is not known what path they must take to achieve it. In this context, this paper uses comparative analysis to try to shed light on the possible differences in the paths taken to achieve SOI by companies with and without FDI, taking into account their different form of knowledge management. To achieve this objective, it has been necessary to build new sustainability indicators (economic, environmental, and social) that allow the evaluation of the sustainability of these processes, considering the sustainability objectives that guided companies towards innovation. Using a logit model for 5897 Spanish companies during the period 2009–2014, this paper contributes both theoretically and empirically to emerging research into the opening of sustainable innovation. It provides a better understanding of the different channels for accessing knowledge for SOI, and examining these channels through absorptive capacity and cooperation, according to its age and size