Influence of the geometric and material characteristics on the strength of glued joints made in chestnut timber

Otero-Chans, Dolores; Estévez-Cimadevila, Javier; Gutiérrez, Emilio Martín

doi:10.1016/j.matdes.2008.06.041

Cited by 23 publications

(5 citation statements)

References 3 publications

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“…The tensile strength is one of the basic parameters (apart from the shear and tear strength) determining the durability and reliability of a glued joint [ 60 , 63 ]. In the case of testing the modified resin itself, the f t value depends largely on the degree of packaging of the polymer molecules in its structure, and the chemical bonds formed during sonication and crosslinking reaction and their durability, as well as the presence of fillers—factors which thus influence the previously described parameters.…”

Section: Resultsmentioning

confidence: 99%

Physico-Mechanical and Rheological Properties of Epoxy Adhesives Modified by Microsilica and Sonication Process

Szewczak

Szeląg

2020

Materials

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Industrial waste from the production of metallic silicon and silicon–iron alloys, which includes silica fumes (microsilica), is subject to numerous applications aiming at its reuse in concrete and polymeric composites. Recycling solves the problem of their storage and adverse environmental impact. Six different formulas of epoxy resins were tested, differing in the type of polymer, the mixing process (sonication or not) and the presence of microsilica. The study showed that microsilica added to the epoxy resin changes its viscosity and free surface energy, and these are the parameters that determine the adhesion of the polymer to the concrete surface. Strength tests and SEM analysis have determined how microsilica molecules can penetrate the structure of polymer macromolecules by filling and forming temporary chemical bonds. Mixing the fillers with the adhesive was achieved by using a sonication process. The analysis of the obtained results showed that, depending on the initial composition of the polymer, the addition of microsilica can change the chemical, physical and mechanical properties of the hardened adhesive to varying degrees. In the case of adhesives used in the construction industry to strengthen and glue structural elements, these changes significantly affect the durability of the adhesive joints.

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Section: Resultsmentioning

confidence: 99%

Physico-Mechanical and Rheological Properties of Epoxy Adhesives Modified by Microsilica and Sonication Process

Szewczak

Szeląg

2020

Materials

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“…Moreover, while some authors have preferred to use a one-sided test set-up [22,41], others have chosen the two-sided set-up [42][43][44]. Jensen et al [45] have accurately described the mechanics of the two test set-ups.…”

Section: Adhesive Strength Of Bonded Rodsmentioning

confidence: 99%

Adhesives for on-site bonding: Characteristics, testing and prospects

Pizzo

Smedley²

2015

Construction and Building Materials

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“…Broughton and Hutchinson [9] investigated the influence of adhesive types on the behaviour of bonded steel rod joints and found that epoxy resin shows the best bearing capacity. Chans et al [10] investigated the influence of geometric and material characteristics on the performance of glued-in rod joints. The joint performance showed evident differences when the joint was parallel [11] and perpendicular [12] to the grain directions.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Fire Resistance of Glued-In Rod Timber Joints with Heat Resistant Modified Epoxy Resin

et al. 2020

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This paper presents an experimental evaluation of the fire resistance of glued-in rod timber joints using epoxy resin, with and without modification. A heat-resistant modified resin was designed by adding inorganic additives into the epoxy resin, aiming to improve the heat resistance. Joints that were made using the modified epoxy resin at room temperature showed a bearing capacity comparable to those with commercial epoxy resin. Twenty-one joint specimens with the modified epoxy resin and six with a commercial epoxy resin were tested in a fire furnace to evaluate the fire resistance. The main failure mode was the pull-out of the rod, which is typical in fire tests of this type of joints. As to the effects of the test parameters, this study considered the effects of adhesive types, sectional sizes, stress levels, and fireproof coatings. The test results showed that the fire resistance period of a joint can be evidently improved by modifying the resin and using the fireproof coating, as the improvements reached 73% and 35%, respectively, compared with the joint specimens with commercial epoxy resin. It was also found that, for all specimens, the fire resistance period decreased with an increase in the stress level and increased with an increase in the sectional sizes.

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Influence of the geometric and material characteristics on the strength of glued joints made in chestnut timber

Cited by 23 publications

References 3 publications

Physico-Mechanical and Rheological Properties of Epoxy Adhesives Modified by Microsilica and Sonication Process

Physico-Mechanical and Rheological Properties of Epoxy Adhesives Modified by Microsilica and Sonication Process

Adhesives for on-site bonding: Characteristics, testing and prospects

Experimental Investigation on the Fire Resistance of Glued-In Rod Timber Joints with Heat Resistant Modified Epoxy Resin

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