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On sampling collection procedure effectiveness for forest soil characterization
Castro, Ana Cristina Meira; Meixedo, João Paulo; Santos, Jorge M.; Góis, Joaquim; Bento-Gonçalves, António; Vieira, António; Lourenço, LucianoOne of the most important measures to prevent wild forest fires is the use of prescribed and controlled burning actions as it reduce the fuel mass availability. The impact of these management activities on soil physical and chemical properties varies according to the type of both soil and vegetation. Decisions in forest management plans are often based on the results obtained from soil-monitoring campaigns. Tho...
Insignificant impact of prescribed fire on surface soil in a Pinus pinaster pla...
Castro, Ana Cristina Meira; Shakesby, R.; Marques, J. Espinha; Santos, N.; Šmid, M.; Meixedo, João Paulo; Teixeira, J.; Chaminé, Helder I.; Doerr, S. H.Following a prescribed fire in a Pinus pinaster forest site located in the north-west Portugal, monitoring of any changes in selected soil characteristics and soil hydrology was undertaken to assess the effects of burning on the following: pH, electrical conductivity, water content, organic carbon and porosity. Thirty plots were established on a regular grid. At each sample plot before and after the fire, sampl...
An integrated recycling approach for GFRP pultrusion wastes: recycling and reus...
Castro, Ana Cristina Meira; Carvalho, João P.; Ribeiro, M. C. S.; Meixedo, João Paulo; Silva, Francisco J. G.; Fiúza, António; Dinis, M. L.In this study, efforts were made in order to put forward an integrated recycling approach for the thermoset based glass fibre reinforced polymer (GPRP) rejects derived from the pultrusion manufacturing industry. Both the recycling process and the development of a new cost-effective end-use application for the recyclates were considered. For this purpose, i) among the several available recycling techniques for t...
Mix design process of polyester polymer mortars modified with recycled GFRP was...
Ribeiro, M. C. S.; Fiúza, António; Castro, Ana Cristina Meira; Silva, Francisco J. G.; Dinis, M. L.; Meixedo, João Paulo; Alvim, Mário RuiIn this study, the effect of incorporation of recycled glass fibre reinforced plastics (GFRP) waste materials, obtained by means of shredding and milling processes, on mechanical behaviour of polyester polymer mortars (PM) was assessed. For this purpose, different contents of GFRP recyclates, between 4% up to 12% in weight, were incorporated into polyester PM materials as sand aggregates and filler replacements...
Characterization of soils in an area of prescribed fire
Santos, N.; Šmid, M.; Castro, Ana Cristina Meira; Marques, J. Espinha; Meixedo, João Paulo; Góis, Joaquim; Chaminé, Helder I.; Vivas, A.; Carvalho, E.The prescribed fire is a technique that is often used, it has several advantages. Pedological and hydropedological techniques were tested to assess the prescribed fire changes may cause in soils. This work was performed in Tresminas area (Vila Pouca de Aguiar, Northern Portugal), during February and March 2011. In the present study we applied several techniques. For the field sampling was followed the ISO 10381...
Análise e comparação da utilização de métodos de Análise de Componentes Princip...
Castro, Ana Cristina Meira; Santos, Jorge; Meixedo, João Paulo; Góis, JoaquimNeste trabalho apresentam-se os resultados da analise e comparação da utilização da Análise de Componentes Principais Clássica (ACP) e a Análise de Componentes Principais Robusta (ACPR) na descrição da relação entre a profundidade de um solo florestal e as alterações em quatro propriedades geoquímicas fundamentais. Os resultados obtidos reconhecem que, neste tipo de dados e cala local, a utilização da ACPR deve...
New End-Use Application for GFRP Recyclates as Reinforcement for Concrete-Polym...
Castro, Ana Cristina Meira; Ribeiro, Maria Cristina; Fiúza, António; Dinis, Maria de Lurdes; Silva, Francisco G.; Meixedo, João PauloGlass fibre-reinforced plastics (GFRP), nowadays commonly used in the construction, transportation and automobile sectors, have been considered inherently difficult to recycle due to both: cross-linked nature of thermoset resins, which cannot be remolded, and complex composition of the composite itself, which includes glass fibres, matrix and different types of inorganic fillers. Presently, most of the GFRP was...
PLSR Models for Mechanical Strengths of Concrete Composite Materials Reinforced...
Castro, Ana Cristina Meira; Ribeiro, M. C. S.; Meixedo, João Paulo; Silva, Francisco J. G.; Alvim, Mário Rui; Fiúza, António; Dinis, M. L.In this paper, we present two Partial Least Squares Regression (PLSR) models for compressive and flexural strength responses of a concrete composite material reinforced with pultrusion wastes. The main objective is to characterize this cost-effective waste management solution for glass fiber reinforced polymer (GFRP) pultrusion wastes and end-of-life products that will lead, thereby, to a more sustainable compo...
Characterization of soils in an area of prescribed fire
Santos, N.; Šmid, M.; Castro, Ana Cristina Meira; Marques, J. Espinha; Meixedo, João Paulo; Góis, Joaquim; Chaminé, Helder I.; Vivas, AntónioThe prescribed fire is a technique that is often used, it has several advantages. Pedological and hydropedological techniques were tested to assess the prescribed fire changes may cause in soils. This work was performed in Tresminas area (Vila Pouca de Aguiar, Northern Portugal), during February and March 2011. In the present study we applied several techniques. For the field sampling was followed the ISO 10381...
Some reflections on acquisition, processing and analysis of statistical data in...
Castro, Ana Cristina Meira; Meixedo, João PauloBeyond the classical statistical approaches (determination of basic statistics, regression analysis, ANOVA, etc.) a new set of applications of different statistical techniques has increasingly gained relevance in the analysis, processing and interpretation of data concerning the characteristics of forest soils. This is possible to be seen in some of the recent publications in the context of Multivariate Statist...
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