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6 records – page 1 of 1.

The Charring Rate of Glulam Beams of Brazilian Wood Species

https://research.thinkwood.com/en/permalink/catalogue1771
Year of Publication
2016
Topic
Fire
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Author
Martins, Gisele
Munaiar Neto, Jorge
Calil Junior, Carlito
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Topic
Fire
Keywords
Charring Rate
Brazil
Density
Fire Test
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 5302-5309
Summary
The combustibility of timber is one of the factors that restrict the use of structural elements of wood in buildings in Brazil. This paper describes an experimental investigation of the charring rate of wood species. The charring rate is one of the key parameters for the design of load bearing timber structures. The purpose of this study is...
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Environmental Thermal Comfort of a Reduced Model Using Cross-Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue2695
Year of Publication
2020
Topic
Energy Performance
Material
CLT (Cross-Laminated Timber)
Application
Roofs
Author
Sampaio, Carlos
Terezo, Rodrigo
Motta, Guilherme
Silva, Leonardo
Júnior, Ilson Vassem
Publisher
SciELO
Year of Publication
2020
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Roofs
Topic
Energy Performance
Keywords
Precasting in Wood
Self-Supporting
Thermal Comfort
Environmental Factors
Brazil
Thermal Performance
Language
English
Research Status
Complete
Series
Engenharia Agrícola
Summary
The challenges for the use of the cross-laminated timber (CLT) system in the Brazilian agricultural market are significant. This study evaluated the thermal performance of fiber cement tiles associated with a CLT non-conventional structure compared to those of ceramic, fiber cement and aluminum roof tiles based on following thermal comfort indexes (i.e., black globe humidity index (BGHI), radiant heat load (RHL) and specific enthalpy) using physical conventional models of reduced-scale rural facilities under summer conditions. The non-conventional CLT model comprised closing walls and a lining that form a self-supporting structure with few air inlets. This model presented reduced thermal comfort indexes compared to the other conventional roofs. Moreover, the CLT model has an average black globe temperature (Tbg) of 32.9 °C, which was lower at all times compared to those of the other roofs. In conclusion, the roof with fiber cement tiles associated with the CLT structure exhibited the best performance in terms of thermal comfort, followed by the ceramic, fiber cement, and aluminum tiles. The study results allow a better understanding of the opportunities for CLT usage.
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Evaluation of Brazilian Reforestation Species in Glulam Beams Before and After Preservative Chemical Treatments

https://research.thinkwood.com/en/permalink/catalogue511
Year of Publication
2014
Topic
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Author
de Alcântara Segundinho, Pedro
Calil Neto, Carlito
Dias, Antonio
Calil Junior, Carlito
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Topic
Mechanical Properties
Keywords
Brazil
Static Bending Test
Chemical Treatment
Copper Chrome Arsenic
Copper Chrome Boron
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
Although the glulam is a product of the nineteenth century, there are few industries in Brazil. The high cost of the structural elements of glulam is committed at the time, its competitiveness with full tropical sawn timber and reforestation. Being a tropical country, we recommend the use of wood treated to prevent termites attack. This study aims to evaluate the resistance of glulam beams before and after being subjected to chemical treatments with pressure using CCA (Copper Chrome Arsenic) and CCB (Copper Chrome Boron). To that end, we tested 54 glulam beams with nominal dimensions of 9 cm x 9 cm x 200 cm, with wood harvested from forest plantations. These beams were subjected to static bending tests, according to Brazilian standard NBR 8458:1984. After analyzing the experimental data it was concluded that the glulam beams produced from wood of Pinus oocarpa had the best results, taking into account the combination wood-adhesive-treatment, because the physical properties remained the same before and after chemical treatment in fullcell method.
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Glued Laminated Timber in Brazil: Past - Present and Future

https://research.thinkwood.com/en/permalink/catalogue1789
Year of Publication
2016
Topic
Market and Adoption
Material
Glulam (Glue-Laminated Timber)
Author
Calil Neto, Carlito
Fujii, Rogerio
Takata, Alexander
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Topic
Market and Adoption
Keywords
Brazil
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 6081-6088
Summary
Almost half of Brazil's area is forest. Technologically manipulated and protected from natural disasters caused by fire, insects and diseases, forests will last forever. As older trees are removed, they are replaced by new trees to replenish the wood supply for future generations. The regeneration cycle, or support field, can easily overcome the...
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Thermo-Energetic Performance of Wooden Dwellings: Benefits of Cross-Laminated Timber in Brazilian Climates

https://research.thinkwood.com/en/permalink/catalogue2691
Year of Publication
2020
Topic
Energy Performance
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Nunes, Gustavo
Moura, Jorge Daniel de Melo
Güths, Saulo
Atem, Camila
Giglio, Thalita
Publisher
Elsevier
Year of Publication
2020
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Energy Performance
Keywords
Brazil
Eucalyptus
Thermo-Energetic Performance
Residential
Climate
Language
English
Research Status
Complete
Series
Journal of Building Engineering
Summary
This research focused on studies of the cross-laminated timber (CLT) construction system and, in particular, on an innovative panel composition of eucalyptus (Eucalyptus grandis) heartwood, which is considered in Brazil as a low-added-value material that is often discarded or used for less noble purposes. The aim of this study was to investigate the thermo-energetic performance of CLT panels for use in low-income housing under several different climate conditions. The research was based on the simulation method of the Brazilian Technical Regulation of Quality for the Energy Efficiency Level of Residential Buildings (RTQ-R). The results, based on 72 parametric simulations, proved that CLT panels made of eucalyptus heartwood have significant potential for thermo-energetic improvement in various housing types under diverse climatic conditions. The simulated envelope combinations showed that in Curitiba (bioclimatic zone 1), it is important to associate 5-layered CLT panels with 10 cm thermal insulation; in São Paulo (bioclimatic zone 3), the envelope should be provided with low solar absorptance and 5-layered CLT panels without thermal insulation; and in Belém (bioclimatic zone 8), in addition to the low solar absorptance in the envelope, the CLT panels should be composed of only three layers and without thermal insulation. It was concluded that the innovative CLT construction system with low-added-value eucalyptus heartwood is a very promising technology for Brazilian dwellings that are more energy efficient, with further studies on mechanical behavior being necessary for its consolidation in the country.
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Wooden Structures in Brazil: Present Situation and Perspectives

https://research.thinkwood.com/en/permalink/catalogue1170
Year of Publication
2014
Topic
Market and Adoption
Author
de Souza Junior, Hélio
Fernandes, Daniel
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Topic
Market and Adoption
Keywords
Brazil
Wood Usage
Construction
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
The use of wood for construction is increasing every year in Brazil. This paper gives an overview of the use of wood in Brazil with a short historical and geographical introduction followed by a number of examples of works by Ita Construtora, which will illustrate the market developments during the last 34 years of its existence. From a starting point of traditional constructions using wood from native forests, we moved on, in the 90s, to the execution of contemporary architecture works of more complex structure. This rich collection of experimentation will be the base for a new leap. Since 2008 we have started the production of glue-laminated eucalyptus timber. The freedom of form and the big dimensions of the parts change the way of thinking structures.
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6 records – page 1 of 1.