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Now showing items 1-20 of 740

Ageing and Characterisation of PVC based compounds utilised for Exterior Applications in the Building Construction Field. Part 2: Artificial accelerated ageing with xenon light

Real, L. P.; Gardette, Jean-Luc (ELSEVIER, 2001)

This set of articles describes the behaviour of formulated polyvinylchorides in various conditions of photoageing, including exposition in artificial and in natural conditions. In this article, the modification of the ...
Ageing and Characterisation of PVC-based compounds utilised for Exterior Applications in the Building Construction Field. Part 1: Thermal ageing

Real, L. P.; Gardette, Jean-Luc (ELSEVIER, 2001)

One major problem encountered with polymeric materials is their sensitivity to outdoors weathering. Exposure to outdoors conditions leads to a degradation of the use properties of the material. This set of articles describes ...
Durabilidade de vernizes aplicados na protecção de madeira

Custódio, J.; Eusébio, M. I. (2003)

This communication is based on a work done in LNEC, which consisted in the study of the protection performance of varnishes applied in wood surfaces for exterior exposure. The objective of this work was to evaluate the ...
Artificial Simulated and Natural Weathering of Poly(vinyl Chloride) for outdoor applications: the evolution of the mechanical and molecular properties

Real, L. P.; Rocha, A.; Gardette, Jean-Luc (ELSEVIER, 2003)

The low cost and the good performance of poly(vinyl chloride) products make this polymer very suitable for applications in buildings, mainly in exterior applications, like window profiles, cladding structures and siding. ...
Production of powder-coated tpwpregs and composites

Nunes, J. P.; J. F. Silva; A.T. Marques; N. Crainic; Cabral-Fonseca, S. (Sage Publications, 2003-05)

Na eficiente and cost-effective dry coating process was developed to deposit polymer powders on continuous fibers and produce thermoplastic matrix towpregs to be processed into composites. The technological solutions used ...
A novel technique for the interface characterisation of glass fibre-polypropylene systems

Cabral-Fonseca, S.; M.C. Paiva; Nunes, J. P.; C.A. Bernardo (Elsevier, 2003-12)

In the present work, a new technique was developed to determine the interfacial properties of two opaque glass fibre/polypropylene (GF/PP) systems via fragmentation tests on single filament model composites. Fragmentation ...
Incorportion of Sludges from aWater Treatment Plant in Cement Mortars

Esteves, A.; Gonçalves, A. (2004)

The results of the characterization of the sludge from a Portuguese water treatment plant and their leachates are presented. Dewatered sludge contains basically water, calcium, aluminium and silica, with an organic matter ...
Durability of varnishes - are subjective assessments enough?

Custódio, J.; Eusébio, M. I.; Ribeiro Nunes, L. M. (2004)

This paper is based on a study of the protection performance of varnishes applied to a wooden substrate for outdoor exposure. The aim of the work was the evaluation of some of the test methods that are often used in the ...
DAMAGE ASSESSMENT AND DIAGNOSIS – Salvas Chapel, Sines

Gonçalves, T. D.; Delgado Rodrigues, J. (LNEC, 2004-02)

This report concerns Salvas Chapel, Sines, which was used as a case-study of the EU project COMPASS. It focuses the assessment of damage, diagnosis and advice for repair of salt decay anomalies. It concludes that capillary ...
DAMAGE ASSESSMENT AND DIAGNOSIS - St. Sebastian Church, Almada

Gonçalves, T. D.; Delgado Rodrigues, J. (LNEC, 2004-03)

This report concerns São Sebastião Church, Almada, which was used as a case-study of the EU project COMPASS. It focuses the assessment of damage, diagnosis and advice for repair of salt decay anomalies. It concludes that ...
DAMAGE ASSESSMENT AND DIAGNOSIS – Alhos-Vedros tide-mill, Moita

Gonçalves, T. D.; Delgado Rodrigues, J. (LNEC, 2004-03)

This report concerns Alhos-Vedros tide-mill, Moita, which was used as a case-study of the EU project COMPASS. It focuses the assessment of damage, diagnosis and advice for repair of salt decay anomalies. It concludes that, ...
DAMAGE ASSESSMENT AND DIAGNOSIS – Cloister of Santa Clara-a-Nova Monastery, Coimbra (lower damage)

Gonçalves, T. D.; Delgado Rodrigues, J. (LNEC, 2004-07)

This report concerns the cloister of Santa Clara-a-Nova Monatery, Coimbra, used as a case-study of the EU project COMPASS. It focuses the assessment of damage, diagnosis and advice for repair of salt decay anomalies. It ...
DAMAGE ASSESSMENT AND DIAGNOSIS - Cloister of Santa Clara-a-Nova Monastery, Coimbra (upper damage)

Gonçalves, T. D.; Delgado Rodrigues, J. (LNEC, 2004-08)

This report concerns the cloister of Santa Clara-a-Nova Monatery, Coimbra, used as a case-study of the EU project COMPASS. It focuses the assessment of damage, diagnosis and advice for repair of salt decay anomalies. It ...
DAMAGE ASSESSMENT AND DIAGNOSIS – Sé Nova, Coimbra

Gonçalves, T. D.; Delgado Rodrigues, J. (LNEC, 2004-08)

This report concerns the Sé Nova, Coimbra, which was used as a case-study of the EU project COMPASS. It focuses the assessment of damage, diagnosis and advice for repair of salt decay anomalies. It concludes that repair ...
Artificial simulated and natural weathering of polyvinylchloride for outdoor applications: the influence of the radiation and water in the changes of properties

Real, L. P.; Gardette, Jean-Luc; Rocha, A. (ELSEVIER, 2005)

Some artificial accelerated methods are currently used and accepted in the prediction of polymer lifetimes. However, in order to evaluate the durability of these materials, it is indispensable to reproduce the natural ...
Influence of ageing conditions on durability of PVC formulations in outdoor applications

Real, L. P. (BRE-ENBRI, 2005-06)

The state of the art in predicting weatherability lags far behind the need for such predictions. The exact prediction of the useful lifetime of a given polymer in a specific geographic location is still the dream of both ...
The Influence of Weathering Conditions in the Evolution of Molecular Properties of Poly(Vinyl Chloride) for Outdoor Applications. An Analytical Study Using Techniques of Surface Analysis (SEM and XPS)

Real, L. P.; Rego, A. M. B. (LNEC, 2006)

The main purpose of this paper is to present the results of a study intended to assess the deterioration condition of extruded hard PVC plates, for outdoor applications. The plates were subject to different ageing conditions, ...
Waterborne acrylic varnishes durability on wood surfaces for exterior exposure

Custódio, J.; Eusébio, M. I. (Elsevier B.V., 2006)

The protection performance of varnishes applied to two different wooden substrates (maritime pine and iroko) for outdoor exposure was investigated for eight different varnish systems (with and without colorants and two ...
Validação de programa informático para calibração de um calorímetro diferencial de varrimento e incerteza associada à determinação da entalpia de fusão

Real, L. P.; Ribeiro, A. (LNEC, 2006)

Procurou-se com a presente comunicação, apresentar uma metodologia de validação de um programa informático, desenvolvido no NMPC do LNEC especificamente para a calibração de um calorimetro diferencial de varrimento (DSC) ...
Tratamentos de superfície de madeira para melhoramento da adesão

Custódio, J.; Cruz, H.; Broughton, J. (2006)

Um requisito importante de uma junta colada, é a sua capacidade para manter um desempenho satisfatório durante a vida útil da estrutura, mesmo nas situações em que esta é exposta a condições extremas de temperatura e ...

Now showing items 1-20 of 740

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