Publications
Posted in International ConferencesProject NG_TPfibPublications

Integrated model for predicting the flexural capacity of concrete elements reinforced with non-corrodible discrete reinforcements

by CiviTestPosted on

Polypropylene fibres (PP) have been used mainly in non-structural applications for limiting crack width due to shrinkage effects of cement-based materials. Being insusceptible to corrosion, PP fibres can also be regarded as viable discrete reinforcement elements for the production of thin concrete elements. The relatively low elasticity modulus, tensile strength and almost frictional-based reinforcing nature of PP fibres have been…
Posted in International ConferencesProject NG_TPfibPublications

Urban furniture in fiber reinforcemenet concrete with high durability

by CiviTestPosted on

Within the scope of the “NG_TPfib” R&D project, Exporplás and CiviTest have, in the recent past, developed a new typology of polypropylene fibers for the production of urban furniture of high durability by eliminating conventional steel reinforcements susceptive to corrosion. This reinforcement replacement strategy also allows the development of lighter and more elegant urban furniture with complex geometries at competitive…
Posted in International ConferencesProject PreSlabTec

Thermal performance of steel and fibre reinforced concrete composite floor

by CiviTestPosted on

In general, steel and concrete composite floors tend to present a reduced functional performance (considering thermal and acoustic conditions), due to their low mass and to the high conductivity of the steel elements. By including components with high thermal insulation capacity in these structural systems, it is possible to maintain the structure lightness and not compromise the thermal performance. Within…
Posted in International Journals (ISI)Publications

A new strengthening technique for increasing the load carrying capacity of rectangular reinforced concrete columns subjected to axial compressive loading

by CiviTestPosted on

In this work, a new technique for the efficient confinement of reinforced concrete (RC) columns of rectangular crosssection is described and its effectiveness is assessed experimentally. This technique is based on the concept of applying strips of carbon fiber reinforced polymer (CFRP) wet layup sheets with a certain prestress level using a mechanical device. The influence of the cross-section aspect…
Posted in International ConferencesProject PreSlabTecPublications

Appraisal of MC2010 shear resistance approaches coupled with a residual flexural strength prediction model

by CiviTestPosted on

In the present work the predictive performance of the two approaches proposed by Model Code 2010 for the evaluation of the shear capacity of fiber reinforced concrete (FRC) elements flexurally reinforced with conventional steel bars is assessed considering a database (DBs) constituted by 80 FRC beams do not including conventional transverse reinforcements. The accuracy of these shear models is evaluated…
Posted in National Conferences

Ensaio à rotura de protótipo de edifício em lajes de betão auto-compactável reforçado com fibras

by CiviTestPosted on

O presente artigo descreve a investigação experimental realizada para avaliar as potencialidades da utilização de betão auto-compactável reforçado com fibras de aço (BACRFA) na construção de lajes fungiformes de edifícios de habitação e comércio, onde as fibras são o único reforço aplicado nas lajes. Para tal foi construído um protótipo deste tipo de edifícios, à escala 1:4, e ensaiado para condições de…
Posted in International Journals (ISI)Project NG_TPfibPublicationsSem categoria

Analytical bond model for general type of reinforcements of finite embedment length in cracked cement based materials

by CiviTestPosted on

In this work, a computational model for simulating the relevant mechanisms governing the pull-out of a discrete reinforcement embedded into cement based materials is described. The model accounts for the material and geometric properties of the reinforcement, which can include an anchored end, the interface between reinforcement and surrounding medium, and the relative inclination of the reinforcement to the crack…
Posted in International Journals (ISI)Publications

Shear strengthening of RC beams with thin panels of mortar reinforced with recycled steel fibres

by CiviTestPosted on

The use of thin cement based panels reinforced with relatively high content of Recycled Steel Fibres (RSF) for the shear strengthening of Reinforced Concrete (RC) beams is investigated in the present work. The mechanical properties of this Recycled Steel Fibre Reinforced Mortar (RSFRM) are characterised. The panels are produced by using a mixing technique similar to the one used in…
Posted in National Conferences

Desenvolvimento de painel sanduíche multifuncional para a reabilitação sustentável de edifícios porticados de betão armado: caracterização de componentes

by CiviTestPosted on

Esta comunicação apresenta um trabalho de investigação dedicado ao desenvolvimento de um painel sanduíche compósito multifuncional concebido para a reabilitação estrutural e térmica de edifícios porticados de betão armado construídos em Portugal a partir da década de 1960 e até meados da década de 1980. Este painel é composto essencialmente por três componentes que visam assegurar a multifuncionalidade pretendida, nomeadamente:…
Posted in National Conferences

Influência da corrosão no comportamento pós-fendilhação do betão reforçado com fibras de aço recicladas

by CiviTestPosted on

O betão reforçado com fibras de aço recicladas (BRFAR) possui elevadas potencialidades técnicas, ambientais e económicas para ser utilizado em aplicações estruturais, constituindo uma solução sustentável que promove a eficiência e durabilidade das estruturas e a sustentabilidade ambiental. A investigação da durabilidade do BRFAR é ainda escassa, nomeadamente, sobre os efeitos da corrosão das fibras no comportamento pré- e pós-fendilhação…

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