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Development of Continuous Composite Joints on the Basis of Polymer Mortar with Matched Properties

https://research.thinkwood.com/en/permalink/catalogue688
Year of Publication
2014
Topic
Mechanical Properties
Design and Systems
Material
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Application
Beams
Author
Kaestner, Martin
Jahreis, Markus
Hädicke, Wolfram
Rautenstrauch, Karl
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Timber-Concrete Composite
Application
Beams
Topic
Mechanical Properties
Design and Systems
Keywords
High-Tech Timber Beam
polymer concrete
Pull-Out Tests
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
For demanding applications with increased requirements in terms of load-carrying capacity and long spans, the HighTech Timber Beam® (HTB) – a hybrid composite beam made of glulam and high-performance materials – was developed at the Bauhaus University in cooperation with a local SME [1]. The applicability of the High-Tech Timber Beam® for TCC constructions (Timber-ConcreteComposite) is examined in ongoing research. In former investigations several studies with new technologies and materials for rehabilitation and strengthening of historic timber structures were carried out at the Bauhaus University [3]. Within those studies, several formulations of glue-mortar based on epoxy resin and mineral fillings (hereinafter also referred to as PC – polymer concrete) were developed to implement a direct and continuous bond between timber and reinforcing materials or elements (for instance LVL, CFRP lamellas, bars made of GFRP or steel). The different mixtures of PC were adjusted to their application purposes through a range of modifications to the composition and detailed material analysis.
Online Access
Free
Resource Link
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High-Tech Timber Beam® - A High-Performance Hybrid Beam System Made of Composites and Timber

https://research.thinkwood.com/en/permalink/catalogue568
Year of Publication
2014
Topic
Design and Systems
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Application
Beams
Author
Kaestner, Martin
Hädicke, Wolfram
Jahreis, Markus
Rautenstrauch, Karl
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
LVL (Laminated Veneer Lumber)
Application
Beams
Topic
Design and Systems
Mechanical Properties
Keywords
polymer concrete
Fibre Reinforced Plastics
Reinforcement
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
Wood in Europe, especially in Germany, is a good available row material. It has a high load capacity and stiffness in comparison to the low death weight. Timber is traditionally used for bending beams and columns with low processing. Since it is a natural material, there are variations in properties and quality. There is a demand for homogenisation for using in modern engineering and for the exploitation of the good properties of timber. Therefore, the timber is sliced, sorted and remounted as glued laminated timber or even as veneer lumber, to eliminate defects, knots or cracks. For increased requirements in terms of load-carrying capacity and long spans, a hybrid composite beam made of glulam and highperformance materials was developed at the Bauhaus University Weimar in cooperation with a local SME. The main material of the developed High-Tech Timber Beam is still glulam with more than 90 % of the girders volume. Replacing one or two lamellas at the bottom side of the glulam by laminated veneer lumber (LVL) allows a significant homogenization of the timber beams properties. For upgrading the compression zone of the bending beam, the upper lamella of the glulam is replaced by a decking of polymer concrete (PC). This is made of a mineral mixture with a special grain-size distribution and a binder on base a of 2-component epoxy resin. The PC has a high compression strength and also a high stiffness because of its high rate of filling with mineral grits.
Online Access
Free
Resource Link
Less detail