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53 records – page 1 of 6.

Bonding Performance of Adhesive Systems for Cross-Laminated Timber Treated with Micronized Copper Azole Type C (MCA-C)

https://research.thinkwood.com/en/permalink/catalogue2200
Year of Publication
2020
Topic
Design and Systems
Connections
Material
CLT (Cross-Laminated Timber)
Author
Lim, Hyungsuk
Tripathi, Sachin
Tang, Juliet
Publisher
ScienceDirect
Year of Publication
2020
Country of Publication
Netherlands
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
Design and Systems
Connections
Keywords
Preservatives
Micronized Copper Azole-Type C
Bonding Performance
Delamination Tests
Block Shear Tests
Adhesives
Block Shear Strength
Wood Failure Percentage
Language
English
Research Status
Complete
Series
Construction and Building Materials
Summary
The feasibility of manufacturing cross-laminated timber (CLT) from southern yellow pine (United States grown) treated with micronized copper azole type C (MCA-C) preservative was evaluated. Lumber (2x6 visually graded no. 2 boards) was treated to two retention levels (1.0 and 2.4 kg/m3 ), planed to a thickness of 35 mm, and assembled along with an untreated control group using three adhesive systems following product specifications: melamine formaldehyde (MF), resorcinol formaldehyde (RF), and one-component polyurethane (PUR). Block shear and delamination tests were conducted to examine the bonding performance in accordance with ASTM D905 and ASTM D2559 Standards, respectively. One-way analysis of variance and Kruskal-Wallis H test were conducted to evaluate the effects of preservative retention and adhesive type on block shear strength (BSS) and wood failure percentage (WFP). Regardless of adhesive type, the 1.0 kg/m3 retention treatment significantly lowered BSS compared to the untreated control. CLT composed of the laminations treated at 2.4 kg/m3 maintained BSS when PUR and RF were used but not MF. The average WFP of each CLT configuration ranged from 89% to 99%. The untreated CLT specimens did not experience any delamination under accelerated weathering cycles. The delamination rates of the treated specimens assembled using MF and RF increased with the preservative retention level, while PUR provided delamination rates less than 1% to the laminations treated at both levels. These combined data suggest that, under the conditions tested, PUR provided overall better bonding performance than MF and RF for MCA-C treated wood.
Online Access
Free
Resource Link
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Development Of CLT Products with Improved Fire Performance

https://research.thinkwood.com/en/permalink/catalogue2598
Year of Publication
2020
Topic
Design and Systems
Fire
Material
CLT (Cross-Laminated Timber)
Author
He, Guangbo
Feng, Martin
Roussiere, Fabrice
Organization
FPInnovations
Year of Publication
2020
Country of Publication
Canada
Format
Report
Material
CLT (Cross-Laminated Timber)
Topic
Design and Systems
Fire
Keywords
Fire Resistance
Adhesives
Bond Durability
Bonding
Treated Wood
Language
English
Research Status
Complete
Summary
The fire resistance of cross-laminated timber (CLT) could be improved by treating the lamina with fire retardants. The major issues with this technology are the reduced bondability of the treated lamina with commercial adhesives. This study assessed several surface preparation methods that could improve the bondability and bond durability of fire-retardant treated wood with two commercial adhesives. Four surface preparation methods, including moisture/heat/pressure, surface planing, surface chemical treatment, and surface plasma treatment were assessed for their impact on the bondability and bond durability of lodgepole pine lamina. The block shear test results indicated that all surface preparation methods were somewhat effective in improving bond performance of fire-retardant treated wood compared to the untreated control wood samples, depending on the types of fire retardants and wood adhesives applied in the treatment process and bonding process. The selection of surface preparation, fire retardant, and wood adhesive should be considered interactively to obtain the best bond properties and fire performance. It may be possible to effectively bond the treated lamina with PUR adhesive without any additional surface preparation for the fire retardant used in the treatment at FPInnovations.
Online Access
Free
Resource Link
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Solutions for Upper Mid-Rise and High-Rise Mass Timber Construction: Fire Performance of Cross-Laminated Timber with Adhesives Conforming to 2018 edition of ANSI/APA PRG-320

https://research.thinkwood.com/en/permalink/catalogue2091
Year of Publication
2019
Topic
Fire
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Dagenais, Christian
Ranger, Lindsay
Bénichou, Noureddine
Organization
FPInnovations
Year of Publication
2019
Country of Publication
Canada
Format
Report
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Fire
Keywords
Mid-Rise
High-Rise
Adhesives
Temperature
Charring Rate
Language
English
Research Status
Complete
Summary
The objective of this research is to evaluate CLT face-bonded with adhesives that meet the new 2018 ANSI/APA PRG 320 with respect to elevated temperature requirements and their effects on the resulting charring rates when exposed to the standard time-temperature curve of CAN/ULC S101 (similar exposure to ASTM E119)...
Online Access
Free
Resource Link
Less detail

Fire Performance of Cross-Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue2227
Year of Publication
2019
Topic
Fire
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems

Structural Performance Analysis of Cross-Laminated Timber-Bamboo (CLTB)

https://research.thinkwood.com/en/permalink/catalogue2415
Year of Publication
2019
Topic
Design and Systems
Material
CLT (Cross-Laminated Timber)
Other Materials
Application
Floors
Walls
Wood Building Systems

Mechanical Properties of Cross-laminated Timber (CLT) Panels Composed of Treated Dimensional Lumber

https://research.thinkwood.com/en/permalink/catalogue2423
Year of Publication
2019
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Walls
Floors
Author
Tripathi, Sachin
Publisher
Mississippi State University
Year of Publication
2019
Country of Publication
United States
Format
Thesis
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Walls
Floors
Topic
Mechanical Properties
Keywords
Panels
Rolling Shear
Preservative
Adhesives
Southern Yellow Pine
Out-of-Plane Load
Language
English
Research Status
Complete
Online Access
Free
Resource Link
Less detail

Use of Northern Hardwoods in Glued-laminated Timber: A Study of Bondline Shear Strength and Resistance to Moisture

https://research.thinkwood.com/en/permalink/catalogue2427
Year of Publication
2019
Topic
Moisture
Design and Systems
Material
Glulam (Glue-Laminated Timber)
Application
Wood Building Systems

Fire Resistance of Unprotected Cross-Laminated Timber (CLT) Floor Assemblies Produced in the USA

https://research.thinkwood.com/en/permalink/catalogue2507
Year of Publication
2019
Topic
Fire
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
Floors
Wood Building Systems

Influence of Strand Size, Board Density, and Adhesive Type on Characteristics of Oriented Strand Lumber Boards Manufactured from Pine Strands

https://research.thinkwood.com/en/permalink/catalogue2511
Year of Publication
2019
Topic
Design and Systems
Mechanical Properties
Material
OSL (Oriented Strand Lumber)
Application
Beams

Fire Safety Challenges of Tall Wood Buildings - Phase 2: Task 5 – Experimental Study of Delamination of Cross Laminated Timber (CLT) in Fire

https://research.thinkwood.com/en/permalink/catalogue1211
Year of Publication
2018
Topic
Fire
Connections
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems

53 records – page 1 of 6.