Characterization and Structural Performance in Bending of CLT Panels Made from Small-Diameter Logs of Loblolly/Slash Pine

Baño, Vanesa; Daniel, Godoy,; Figueredo, Diego; Vega, Abel Betanzos

doi:10.3390/ma11122436

Cited by 18 publications

(7 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In [ 15 , 16 , 17 ], the authors also combined different species of wood with the same final conclusion of low-grade, high-grade timber distribution for inner and outer parts of the glulam timber, respectively. Furthermore, this conclusion has been recently extended to CLT (Cross Laminated Timber) panels [ 18 ]. In [ 16 ], when a high-grade wood such as Merpauh was used for the outer planks, improvements of the modulus of elasticity between 117% and 157% were achieved.…”

Section: Introductionmentioning

confidence: 95%

Experimental and Numerical Analysis of Mixed I-214 Poplar/Pinus Sylvestris Laminated Timber Subjected to Bending Loadings

et al. 2020

View full text Add to dashboard Cite

The structural use of timber coming from fast growing and low-grade species such as poplar is one of the current challenges in the wood value chains, through the development of engineering products. In this work, a qualitative comparison of the behavior of mixed glued laminated timber made of pine in their outer layers and of poplar in their inner layers is shown and discussed. Single-species poplar and pine laminated timber have been used as control layouts. The investigation includes destructive four-point bending tests and three non-destructive methodologies: finite elements numerical model; semi-analytical model based on the Parallel Axes theorem and acoustic resonance testing. An excellent agreement between experimental and numerical results is obtained. Although few number of samples have been tested, the results indicate that the use of poplar as a low-grade species in the inner layers of the laminated timber can be a promising technology to decrease the weight of the timber maintaining the good mechanical properties of pine. Likewise, the need for the use of the shear modulus in both experimental measurements and numerical analysis is suggested, as well as the need to reformulate the vibration methodology for non-destructive grading in the case of mixed timber.

show abstract

Section: Introductionmentioning

confidence: 95%

Experimental and Numerical Analysis of Mixed I-214 Poplar/Pinus Sylvestris Laminated Timber Subjected to Bending Loadings

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The mean values obtained for the panels in all treatments were exceeding the results reported in the literature. Baño et al (2018) studied CLT panels made of Pinus Loblolly wood and polyurethane adhesive. The dimensions of the panels were 0.381 x 0.102 m, similar to the panels of this study and the mean value obtained for density was 388 kg.m -³.…”

Section: Physical Propertiesmentioning

confidence: 99%

Performance of cross laminated timber panels made of Pinus oocarpa and Coffea arabica waste

Furtini

Santos

Garcia

et al. 2021

View full text Add to dashboard Cite

The growth of the civil construction sector, made necessary to develop alternative products made of sustainable materials. Within this context came the cross laminated timber panels (CLT), which are formed by gluing veneer arranged at 90°, which provide high strength and great versatility, as constructive elements. This research aimed to evaluate the chemical properties of the particles of both materials and evaluate the performance of CLT panels made with Pinus oocarpa and waste wood from Coffea arabica. The panels were made with three orthogonal layers with veneer of pine and coffee wood, using the phenol-formaldehyde (PF) adhesive with a spread rate of 0.35kgm -² and the hydraulic press with a pressure of 1,2×10 7 N.m -2 for 15 min. The physical, mechanical properties, acoustic and thermal performance of the panels were evaluated. There was a significant difference for water absorption in 2 and 24 hours. The panels produced only with coffee wood waste showed the lowest water absorption rates, corresponding to 10.2 and 33.3%, in 2 and 24 hours. In relation to the MOE, the panels made with varied veneer were statistically equivalent to each other and the panels made of pine blades showed a MOE corresponding to 3,33×10 7 N.m -2 . The same trend was observed for MOR, since the average value obtained for pine panels, corresponding to 1,35x10 8 N.m -2 was significantly higher. Panels made of coffee veneer and pine veneer showed no delamination. With regard to acoustic and thermal evaluation, all panels met the minimum requirements indicated in the standards, with emphasis on coffee wood waste, associated or not with pine wood.

show abstract

“…EWPs such as laminated veneer lumber (LVL), plywood, oriented strand board (OSB), and mass timber products such as glue-laminated timber (Glulam), cross laminated timber (CLT), and structural composite lumber (SCL) that are used in building construction have been around for decades, for instance. Since the application of mass timber products in the construction of tall buildings is of interest to the industry and the research community these days, several studies have evaluated different aspects of these products [ 13 , 14 , 15 ]. Additionally, limited work has been conducted on developing wood-based composite sandwich panels with three-dimensional cores for use in building envelopes.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Wood Composite Sandwich Panels as a Promising Renewable Building Material

2021

View full text Add to dashboard Cite

During this study, full-size wood composite sandwich panels, 1.2 m by 2.4 m (4 ft by 8 ft), with a biaxial corrugated core were evaluated as a building construction material. Considering the applications of this new building material, including roof, floor, and wall paneling, sandwich panels with one and two corrugated core(s) were fabricated and experimentally evaluated. Since primary loads applied on these sandwich panels during their service life are live load, snow load, wind, and gravity loads, their bending and compression behavior were investigated. To improve the thermal characteristics, the cavities within the sandwich panels created by the corrugated geometry of the core were filled with a closed-cell foam. The R-values of the sandwich panels were measured to evaluate their energy performance. Comparison of the weight indicated that fabrication of a corrugated panel needs 74% less strands and, as a result, less resin compared to a strand-based composite panel, such as oriented strand board (OSB), of the same size and same density. Bending results revealed that one-layer core sandwich panels with floor applications under a 4.79 kPa (100 psf) bending load are able to meet the smallest deflection limit of L/360 when the span length (L) is 137.16 cm (54 in) or less. The ultimate capacity of two-layered core sandwich panels as a wall member was 94% and 158% higher than the traditional walls with studs under bending and axial compressive loads, respectively. Two-layered core sandwich panels also showed a higher ultimate capacity compared to structural insulated panels (SIP), at 470% and 235% more in bending and axial compression, respectively. Furthermore, normalized R-values, the thermal resistance, of these sandwich panels, even with the presence of thermal bridging due to the core geometry, was about 114% and 109% higher than plywood and oriented strand board, respectively.

show abstract

Characterization and Structural Performance in Bending of CLT Panels Made from Small-Diameter Logs of Loblolly/Slash Pine

Cited by 18 publications

References 27 publications

Experimental and Numerical Analysis of Mixed I-214 Poplar/Pinus Sylvestris Laminated Timber Subjected to Bending Loadings

Experimental and Numerical Analysis of Mixed I-214 Poplar/Pinus Sylvestris Laminated Timber Subjected to Bending Loadings

Performance of cross laminated timber panels made of Pinus oocarpa and Coffea arabica waste

Evaluation of Wood Composite Sandwich Panels as a Promising Renewable Building Material

Contact Info

Product

Resources

About