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Research paper thumbnail of INFLUÊNCIA DA SEÇÃO TRANSVERSAL NA VELOCIDADE ULTRA-SÔNICA NA MADEIRA DE Eucalyptus citriodora

This paper reports the variation of ultrasonic velocity in the cross-section of Eucalyptus citrio... more This paper reports the variation of ultrasonic velocity in the cross-section of Eucalyptus citriodora. Ultrasonic measurements were taken with an experimental V-Meter 54 kHz and 150 kHz apparatus. Tests were carried out with initial cross- section of 12 cm x 12 cm, varying until 12 cm x 1 cm and constant length (50 cm). The results showed that longitudinal ultrasonic

Research paper thumbnail of The influence of cement type and admixture on life span of reinforced concrete utility poles subjected to the high salinity environment of Northeastern Brazil, studied by corrosion potential testing

Cerâmica, 2004

... corrosão. A. Joukoski I, II ; KF Portella II ; O. Baron II ; CM Garcia II ; GR Vergés I, II ;... more ... corrosão. A. Joukoski I, II ; KF Portella II ; O. Baron II ; CM Garcia II ; GR Vergés I, II ; A. Sales II ; JF de Paula III. ... aggregates. Another mixture was batched with CPV-ARI RS (high-early-strength Portland cement, with sulfur resistance). ...

Research paper thumbnail of Relationship between density and ultrasonic velocity in Brazilian tropical woods

Research paper thumbnail of Co-disposição de lodo centrifugado de Estação de Tratamento de Água (ETA) em matriz de concreto: método alternativo de preservação ambiental

Research paper thumbnail of Signatura: BR0504380

Research paper thumbnail of A influência do tipo de cimento e adição na vida útil de postes de concreto armado submetidos ao ambiente de alta salinidade do Nordeste do Brasil, estudada pela técnica de potencial de corrosão

Research paper thumbnail of Velocidade ultra-sônica em função da variação do comprimento de peças de madeira

Research paper thumbnail of Desempenho elétrico de concreto armado com cimento Portland composto com pozolana, CPII-Z 32, em função do envelhecimento por íons cloreto. Parte I, estudo da corrosão da armadura.♦

Research paper thumbnail of Carbon footprint of coarse aggregate in Brazilian construction

Research paper thumbnail of Avaliação da retenção de CCA em postes de eucalipto deteriorados

Research paper thumbnail of Caracterização físico-química da cinza do bagaço da cana-de-açúcar visando o seu uso em argamassas e concretos como substituto do agregado miúdo

Research paper thumbnail of Assessment of mechanical properties of wood using an ultrasonic technique

Research paper thumbnail of AVALIAÇÃO DE PROPRIEDADES MECÂNICAS DE MADEIRA POR MEIO DE ULTRA-SOM

... celular. Segundo KABIR et al. ... De acordo com MCDONALD et al. (1990), altas correlações têm... more ... celular. Segundo KABIR et al. ... De acordo com MCDONALD et al. (1990), altas correlações têm sido observadas entre os módulos de elasticidade obtidos a partir das técnicas de ondas acústicas (Ed) e flexão estática (MOE). É ...

Research paper thumbnail of Moisture content effect on ultrasonic velocity in Goupia glabra

Materials Research-ibero-american Journal of Materials, 2005

... Fabiana Goia Rosa de Oliveira I, * ; Marcela Candian II ; Francieli F. Lucchette II ; José Lu... more ... Fabiana Goia Rosa de Oliveira I, * ; Marcela Candian II ; Francieli F. Lucchette II ; José Luis ... I University of São Paulo, São Carlos - SP, Brazil II Department of Civil Engineering, UFSCar ... is exceeded and free water is present in cellular cavities, the material's porosity takes over as ...

Research paper thumbnail of The influence of cement type and admixture on life span of reinforced concrete utility poles subjected to the high salinity environment of Northeastern Brazil, studied by corrosion potential testing (A influência do tipo de cimento e adição na vida útil de postes de concreto armado submetidos ao ...

Reinforced concrete structures installed in coastal zones have constantly been threatened by envi... more Reinforced concrete structures installed in coastal zones have constantly been threatened by environmental damaging elements. The chloride ion is known as one of the most aggressive of these elements, causing, among other damages, corrosion of the steel reinforcement and then degradation of the concrete matrix. The goal of this work was to determine the influence of cement type on the

Research paper thumbnail of Study of the Influence of Cement Type, Cement Content and Concrete Cover Thickness on the Resistance and Durability of Concretes Subjected to Chloride Ion Aging

Synopsis: Reinforced concrete structures constructed in coastal zones have constantly been threat... more Synopsis: Reinforced concrete structures constructed in coastal zones have constantly been threatened by environmental damaging elements. The chloride ion is known as one of the most aggressive of these elements, causing, among other damages, corrosion of the steel reinforcement and degradation of concrete. The goal of this work was to determinate the influence of the cement type and cement content,

Research paper thumbnail of Mechanical properties of concrete produced with a composite of water treatment sludge and sawdust

Construction and Building Materials, 2011

In developing countries such as Brazil, the wastes generated in the decanters and filters of wate... more In developing countries such as Brazil, the wastes generated in the decanters and filters of water treatment plants are discharged directly into the same rivers and streams that supply water for treatment. Another environmental problem is the unregulated discard of wood wastes. The lumber and wood products industry generates large quantities of this waste, from logging to the manufacture of

Research paper thumbnail of NONDESTRUCTIVE EVALUATION OF WOOD USING ULTRASONIC TECHNIQUE

Maderas. Ciencia y tecnología, 2002

ABSTRACT This paper reports on a study of the application of ultrasound waves in wood with the pu... more ABSTRACT This paper reports on a study of the application of ultrasound waves in wood with the purpose of evaluating the mechanical properties of Pinus taeda. Tests were carried out to determine the properties of density at 12% moisture content (ρ ap, 12%) and ...

Research paper thumbnail of Concretos com cinza do bagaço da cana-de-açúcar: avaliação da durabilidade por meio de ensaios de carbonatação e abrasão

Ambiente Construído (Online), 2011

Research paper thumbnail of Efeito do comprimento do corpo-de-prova na velocidade ultra-sônica em madeiras

Revista Árvore, 2006

Resumen: O presente artigo apresenta um estudo sobre a varia????o da velocidade ultra-s??nica lon... more Resumen: O presente artigo apresenta um estudo sobre a varia????o da velocidade ultra-s??nica longitudinal em fun????o do comprimento da pe??a de madeira. As esp??cies utilizadas foram: pinus caribaea (Pinus caribaea var. caribaea) eucalipto citriodora (Eucalyptus ...

Research paper thumbnail of INFLUÊNCIA DA SEÇÃO TRANSVERSAL NA VELOCIDADE ULTRA-SÔNICA NA MADEIRA DE Eucalyptus citriodora

This paper reports the variation of ultrasonic velocity in the cross-section of Eucalyptus citrio... more This paper reports the variation of ultrasonic velocity in the cross-section of Eucalyptus citriodora. Ultrasonic measurements were taken with an experimental V-Meter 54 kHz and 150 kHz apparatus. Tests were carried out with initial cross- section of 12 cm x 12 cm, varying until 12 cm x 1 cm and constant length (50 cm). The results showed that longitudinal ultrasonic

Research paper thumbnail of The influence of cement type and admixture on life span of reinforced concrete utility poles subjected to the high salinity environment of Northeastern Brazil, studied by corrosion potential testing

Cerâmica, 2004

... corrosão. A. Joukoski I, II ; KF Portella II ; O. Baron II ; CM Garcia II ; GR Vergés I, II ;... more ... corrosão. A. Joukoski I, II ; KF Portella II ; O. Baron II ; CM Garcia II ; GR Vergés I, II ; A. Sales II ; JF de Paula III. ... aggregates. Another mixture was batched with CPV-ARI RS (high-early-strength Portland cement, with sulfur resistance). ...

Research paper thumbnail of Relationship between density and ultrasonic velocity in Brazilian tropical woods

Research paper thumbnail of Co-disposição de lodo centrifugado de Estação de Tratamento de Água (ETA) em matriz de concreto: método alternativo de preservação ambiental

Research paper thumbnail of Signatura: BR0504380

Research paper thumbnail of A influência do tipo de cimento e adição na vida útil de postes de concreto armado submetidos ao ambiente de alta salinidade do Nordeste do Brasil, estudada pela técnica de potencial de corrosão

Research paper thumbnail of Velocidade ultra-sônica em função da variação do comprimento de peças de madeira

Research paper thumbnail of Desempenho elétrico de concreto armado com cimento Portland composto com pozolana, CPII-Z 32, em função do envelhecimento por íons cloreto. Parte I, estudo da corrosão da armadura.♦

Research paper thumbnail of Carbon footprint of coarse aggregate in Brazilian construction

Research paper thumbnail of Avaliação da retenção de CCA em postes de eucalipto deteriorados

Research paper thumbnail of Caracterização físico-química da cinza do bagaço da cana-de-açúcar visando o seu uso em argamassas e concretos como substituto do agregado miúdo

Research paper thumbnail of Assessment of mechanical properties of wood using an ultrasonic technique

Research paper thumbnail of AVALIAÇÃO DE PROPRIEDADES MECÂNICAS DE MADEIRA POR MEIO DE ULTRA-SOM

... celular. Segundo KABIR et al. ... De acordo com MCDONALD et al. (1990), altas correlações têm... more ... celular. Segundo KABIR et al. ... De acordo com MCDONALD et al. (1990), altas correlações têm sido observadas entre os módulos de elasticidade obtidos a partir das técnicas de ondas acústicas (Ed) e flexão estática (MOE). É ...

Research paper thumbnail of Moisture content effect on ultrasonic velocity in Goupia glabra

Materials Research-ibero-american Journal of Materials, 2005

... Fabiana Goia Rosa de Oliveira I, * ; Marcela Candian II ; Francieli F. Lucchette II ; José Lu... more ... Fabiana Goia Rosa de Oliveira I, * ; Marcela Candian II ; Francieli F. Lucchette II ; José Luis ... I University of São Paulo, São Carlos - SP, Brazil II Department of Civil Engineering, UFSCar ... is exceeded and free water is present in cellular cavities, the material's porosity takes over as ...

Research paper thumbnail of The influence of cement type and admixture on life span of reinforced concrete utility poles subjected to the high salinity environment of Northeastern Brazil, studied by corrosion potential testing (A influência do tipo de cimento e adição na vida útil de postes de concreto armado submetidos ao ...

Reinforced concrete structures installed in coastal zones have constantly been threatened by envi... more Reinforced concrete structures installed in coastal zones have constantly been threatened by environmental damaging elements. The chloride ion is known as one of the most aggressive of these elements, causing, among other damages, corrosion of the steel reinforcement and then degradation of the concrete matrix. The goal of this work was to determine the influence of cement type on the

Research paper thumbnail of Study of the Influence of Cement Type, Cement Content and Concrete Cover Thickness on the Resistance and Durability of Concretes Subjected to Chloride Ion Aging

Synopsis: Reinforced concrete structures constructed in coastal zones have constantly been threat... more Synopsis: Reinforced concrete structures constructed in coastal zones have constantly been threatened by environmental damaging elements. The chloride ion is known as one of the most aggressive of these elements, causing, among other damages, corrosion of the steel reinforcement and degradation of concrete. The goal of this work was to determinate the influence of the cement type and cement content,

Research paper thumbnail of Mechanical properties of concrete produced with a composite of water treatment sludge and sawdust

Construction and Building Materials, 2011

In developing countries such as Brazil, the wastes generated in the decanters and filters of wate... more In developing countries such as Brazil, the wastes generated in the decanters and filters of water treatment plants are discharged directly into the same rivers and streams that supply water for treatment. Another environmental problem is the unregulated discard of wood wastes. The lumber and wood products industry generates large quantities of this waste, from logging to the manufacture of

Research paper thumbnail of NONDESTRUCTIVE EVALUATION OF WOOD USING ULTRASONIC TECHNIQUE

Maderas. Ciencia y tecnología, 2002

ABSTRACT This paper reports on a study of the application of ultrasound waves in wood with the pu... more ABSTRACT This paper reports on a study of the application of ultrasound waves in wood with the purpose of evaluating the mechanical properties of Pinus taeda. Tests were carried out to determine the properties of density at 12% moisture content (ρ ap, 12%) and ...

Research paper thumbnail of Concretos com cinza do bagaço da cana-de-açúcar: avaliação da durabilidade por meio de ensaios de carbonatação e abrasão

Ambiente Construído (Online), 2011

Research paper thumbnail of Efeito do comprimento do corpo-de-prova na velocidade ultra-sônica em madeiras

Revista Árvore, 2006

Resumen: O presente artigo apresenta um estudo sobre a varia????o da velocidade ultra-s??nica lon... more Resumen: O presente artigo apresenta um estudo sobre a varia????o da velocidade ultra-s??nica longitudinal em fun????o do comprimento da pe??a de madeira. As esp??cies utilizadas foram: pinus caribaea (Pinus caribaea var. caribaea) eucalipto citriodora (Eucalyptus ...

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