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Development of Preservative-Treated ...

Ayanleye, Samuel Oluwafemi.

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Development of Preservative-Treated Cross-Laminated Timber and Lignin-Reinforced Polyurethane-Adhesive for Glued Laminated Timber.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Development of Preservative-Treated Cross-Laminated Timber and Lignin-Reinforced Polyurethane-Adhesive for Glued Laminated Timber./
Author:	Ayanleye, Samuel Oluwafemi.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
Description:	161 p.
Notes:	Source: Dissertations Abstracts International, Volume: 85-02, Section: B.
Contained By:	Dissertations Abstracts International85-02B.
Subject:	Forestry. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30570984
ISBN:	9798380116152

Development of Preservative-Treated Cross-Laminated Timber and Lignin-Reinforced Polyurethane-Adhesive for Glued Laminated Timber.
Ayanleye, Samuel Oluwafemi.

Development of Preservative-Treated Cross-Laminated Timber and Lignin-Reinforced Polyurethane-Adhesive for Glued Laminated Timber. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 161 p.

Source: Dissertations Abstracts International, Volume: 85-02, Section: B.

Thesis (Ph.D.)--Mississippi State University, 2023.

This item must not be sold to any third party vendors.

Interest in the use of mass timber in building and construction is growing worldwide, this is due to the structural integrity and reduced environmental footprint of timber-based structures. Concerns associated with the biological and environmental degradation of mass timber necessitate the development of adequate protection strategies to ensure the durability of these products. Preservative treatment is a proven technique that increases the durability and performance of wood in-service and can also be applied to large-sized timber panels such as cross-laminated timber (CLT). Therefore, this study focused on investigating the feasibility of treating prefabricated 3- and 5-layer CLT panels with Copper-azole type C (CA-C) and micronized copper azole (MCA) preservatives. Further, we studied the effects of panel layup and thickness on the preservative impregnation in CLT. Based on the experimental results, we found adequate preservative penetration and retention in the treated 3- and 5-layer CLT panels, particularly in CA-C treated panels. Also, the lengthwise layup shows better treatment results in both CA-C and MCA-treated panels. In addition to the preservative-treatment of CLT panels, this dissertation covers the development of lignin-reinforced polyurethane adhesive (PUR) for bonding glue-laminated timber (Glulam). Herein, the glulam were fabricated and bonded using lignin-reinforced PUR at different wt% (1, 2, and 3) and tested for shear strength, wood failure and delamination. The lignin-treated PUR samples showed improved adhesion properties via high shear strength and reduced delamination compared to the control specimens. Thus, the lignin-reinforced PUR adhesive shows great potential as a bio-based and environment-friendly wood adhesive for producing glulam used in structural applications.

ISBN: 9798380116152Subjects--Topical Terms:

895157
Forestry.
Subjects--Index Terms:

Cross-laminated timber

Development of Preservative-Treated Cross-Laminated Timber and Lignin-Reinforced Polyurethane-Adhesive for Glued Laminated Timber.
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100 1 $a Ayanleye, Samuel Oluwafemi. $3 3762970
245 1 0 $a Development of Preservative-Treated Cross-Laminated Timber and Lignin-Reinforced Polyurethane-Adhesive for Glued Laminated Timber.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2023
300 $a 161 p.
500 $a Source: Dissertations Abstracts International, Volume: 85-02, Section: B.
500 $a Advisor: Shmulsky, Rubin.
502 $a Thesis (Ph.D.)--Mississippi State University, 2023.
506 $a This item must not be sold to any third party vendors.
520 $a Interest in the use of mass timber in building and construction is growing worldwide, this is due to the structural integrity and reduced environmental footprint of timber-based structures. Concerns associated with the biological and environmental degradation of mass timber necessitate the development of adequate protection strategies to ensure the durability of these products. Preservative treatment is a proven technique that increases the durability and performance of wood in-service and can also be applied to large-sized timber panels such as cross-laminated timber (CLT). Therefore, this study focused on investigating the feasibility of treating prefabricated 3- and 5-layer CLT panels with Copper-azole type C (CA-C) and micronized copper azole (MCA) preservatives. Further, we studied the effects of panel layup and thickness on the preservative impregnation in CLT. Based on the experimental results, we found adequate preservative penetration and retention in the treated 3- and 5-layer CLT panels, particularly in CA-C treated panels. Also, the lengthwise layup shows better treatment results in both CA-C and MCA-treated panels. In addition to the preservative-treatment of CLT panels, this dissertation covers the development of lignin-reinforced polyurethane adhesive (PUR) for bonding glue-laminated timber (Glulam). Herein, the glulam were fabricated and bonded using lignin-reinforced PUR at different wt% (1, 2, and 3) and tested for shear strength, wood failure and delamination. The lignin-treated PUR samples showed improved adhesion properties via high shear strength and reduced delamination compared to the control specimens. Thus, the lignin-reinforced PUR adhesive shows great potential as a bio-based and environment-friendly wood adhesive for producing glulam used in structural applications.
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650 4 $a Wood sciences. $3 3168288
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653 $a Glue-laminated timber
653 $a Mass timber
653 $a Polyurethane adhesive
653 $a Preservative treatment
653 $a Shear strength
690 $a 0478
690 $a 0746
710 2 $a Mississippi State University. $b Department of Sustainable Bioproducts. $3 3762971
773 0 $t Dissertations Abstracts International $g 85-02B.
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791 $a Ph.D.
792 $a 2023
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30570984