Effect of repeated wetting and drying on withdrawal capacity and corrosion of nails in treated and untreated timber

Yermán, Luis; Ottenhaus, Lisa-Mareike; Montoya, Camilo Soto; Morrell, Jeffrey J.

doi:10.1016/j.conbuildmat.2021.122878

Cited by 14 publications

(5 citation statements)

References 6 publications

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“…Traditional water-borne preservatives, which contain toxic substances such as chromium and arsenic, have been generally replaced by alternative preservatives such as alkaline copper quaternary (ACQ), copper azole (CuAz), micronized copper quaternary (MCQ) and boron-based preservatives (Janin et al 2011;Caldeira et al 2010). Organic solvent-borne preservatives are also an application trend (Yerman et al 2021). According to Chinese standard GB/T 27651 − 2011 (2011), preservative-treated wood can be generally divided into ve grades from C1 to C5 depending on use classes.…”

Section: Introductionmentioning

confidence: 99%

Permeability of wood impregnated with polyethylene wax emulsion in vacuum

Liu

Kong

Wang

et al. 2023

Polymer

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Section: Introductionmentioning

confidence: 99%

Permeability of wood impregnated with polyethylene wax emulsion in vacuum

Liu

Kong

Wang

et al. 2023

Polymer

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“…Most timber buildings are designed to exclude moisture, but some elements may be subjected to wetting and must be supplementally protected with preservatives to provide acceptable service life. Many of these preservatives are water-based products that may accelerate fastener corrosion and eventually the loss of mechanical properties of the timber connection [4]. For this reason, most preservative suppliers recommend the use of either stainless steel or hot-dip-galvanized fasteners.…”

Section: Introduction 123mentioning

confidence: 99%

“…Wen Feng, School of Civil Engineering, The University of Queensland, Australia, w.feng1@uq.net.au4 Lisa-Mareike Ottenhaus, School of Civil Engineering, The University of Queensland, Australia, l.ottenhaus@uq.edu.au…”

mentioning

confidence: 99%

Impact of Moisture Cycling on Screw Withdrawal Capacity of Treated and Untreated Radiata Pine

Yermán

Yan

Feng

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

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The increased use of wood products for construction has intensified the need to understand how moisture affects the mechanical properties of timber connections. The withdrawal capacity of dowel-type fasteners, such as screws, needs to be measured, or estimated, for the design of timber systems having connections with axially loaded dowel-type fasteners. The influence of the moisture content changes on the timber is often examined, but its effect on the mechanical performance of connections is poorly considered, including the design codes. This work examined changes in the screw withdrawal capacity in light organic solvent preservative-treated and untreated Radiata pine with type 17 screws inserted perpendicular and parallel to the grain and subjected to repeated wetting and drying cycles. A comparison of the screw withdrawal capacities with those predicted from Australian and European codes was performed. The results presented here are part of a larger project that includes the study of embedment strength and lateral resistance in combination with different wood treatments and pine species.

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“…Apart from the aforementioned characteristics, Yermán et al [ 49 ] evaluated the withdrawal resistance of nails in modified and unmodified pine wood in terms of cyclic moisture changes. The results indicated that under moisture fluctuations, nail withdrawal ability seems to be lost owing to a combination of corrosion and the mechano-sorptive process of the nails backing out with alternating wetting and drying.…”

Section: Introductionmentioning

confidence: 99%

Withdrawal Performance of Nails and Screws in Cross-Laminated Timber (CLT) Made of Poplar (Populus alba) and Fir (Abies alba)

et al. 2022

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Cross-laminated timber (CLT) can be used as an element in various parts of timber structures, such as bridges. Fast-growing hardwood species, like poplar, are useful in regions where there is a lack of wood resources. In this study, the withdrawal resistance of nine types of conventional fasteners (stainless-steel nails, concrete nails and screws, drywall screws, three types of partially and fully threaded wood screws, and two types of lag screws), with three loading directions (parallel to the grain, perpendicular to the surface, and tangential), and two layer arrangements (0-90-0° and 0-45-0°) in 3-ply CLTs made of poplar as a fast-growing species and fir as a common species in manufacturing of CLT was investigated. Lag screws (10 mm) displayed the highest withdrawal resistance (145.77 N), whereas steel nails had the lowest (13.13 N), according to the main effect analysis. Furthermore, fasteners loaded perpendicular to the grain (perpendicular to the surface and tangential) had higher withdrawal resistance than those loaded parallel to the grain (edge). In terms of the layer arrangement, fasteners in CLTs manufactured from poplar wood (0-45-0°) had the greatest withdrawal resistance, followed by CLTs manufactured from poplar wood in the (0-90-0°) arrangement, and finally, those made from fir wood in the (0-90-0°) arrangement. The fastener type had the most significant impact on the withdrawal resistance, so changing the fastener type from nails to screws increased it by about 5–11 times, which is consistent with other studies. The results showed that poplar, a fast-growth species, is a proper wood for manufacturing CLTs in terms of fastener withdrawal performance.

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Effect of repeated wetting and drying on withdrawal capacity and corrosion of nails in treated and untreated timber

Cited by 14 publications

References 6 publications

Permeability of wood impregnated with polyethylene wax emulsion in vacuum

Permeability of wood impregnated with polyethylene wax emulsion in vacuum

Impact of Moisture Cycling on Screw Withdrawal Capacity of Treated and Untreated Radiata Pine

Withdrawal Performance of Nails and Screws in Cross-Laminated Timber (CLT) Made of Poplar (Populus alba) and Fir (Abies alba)

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