R-based image analysis to quantify checking and shrinkage from wood wedges

Rocha-Sepúlveda, Manuel F.; Vega, Mario; Gendvilas,; Williams, Dean R; Harrison, Peter A.; Vaillancourt, René E.; Potts, Brad M.

doi:10.1007/s00107-021-01715-0

Cited by 5 publications

(1 citation statement)

References 28 publications

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“…A pattern of circular concentric rings centred on the pith was superimposed onto the CAD file to study the formation of tangential cracks on the end face. Image analysis was performed using the freely available software ImageJ, which has been used in other reference studies [36,37]. As shown in Figure 3(d), separated each 10 mm, 3 or 4 rings (depending on size) were overlaid: ring 1, named r1; ring 2, named r2; ring 3, named r3; ring 4, named r4; and like last ring, the perimeter without bark, named rp.…”

Section: Measurement Of Cracking On Log End-facesmentioning

confidence: 99%

Assessing Treatments to Mitigate End-Face Cracking in Air-Dried <em>Acacia dealbata </em>Logs

Suazo-Uribe,

Salvo-Sepúlveda,

Rosales

et al. 2024

Preprint

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Acacia dealbata Link, named Mimosa in Portugal, is an invasive hardwood species with potential for construction use, but research is limited. The available stock of small-diameter juvenile wood (sjw) logs can help reduce this gap, but tangential cracking at log ends challenges fastener connections. This study evaluated different treatments to control and reduce end-face cracking in sjw logs during air drying, an economical and environmentally friendly procedure. Extreme two-thirds of sixteen Mimosa logs were subjected to two treatments: one with longitudinal kerfs 15 mm deep along the length (2 and 3 kerfs) and the other with a hollow in the centre up to half the length (16 mm and 30 mm diameters). Over 219 days of air drying and compared with the central part, kerfing treatments significantly reduced outer wood tangential cracking (p &lt; 0.001), with the 3-kerf also reducing crack numbers (p &lt; 0.05) but increasing significantly cracks near the pith (p &lt; 0.01). The 30 mm central hollow significantly reduced central perforation cracking (p &lt; 0.05). Results suggest that a combined treatment approach could help mitigate cracking, enhancing the suitability of wild Mimosa logs for construction use.

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Section: Measurement Of Cracking On Log End-facesmentioning

confidence: 99%

Assessing Treatments to Mitigate End-Face Cracking in Air-Dried <em>Acacia dealbata </em>Logs

Suazo-Uribe,

Salvo-Sepúlveda,

Rosales

et al. 2024

Preprint

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Microstructural characterization of lime modified bagasse ash blended expansive clays using digital image analysis

Pradeep

Muthukumar

2023

Environ Earth Sci

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In the eld practice, industrial wastes are recommended for use in construction to achieve both environmental and economic bene ts. A novel technique of supplementing lime to the black cotton soil stabilized with bagasse ash is adopted to overcome the shortcomings of the black cotton soil stabilized with bagasse ash alone. The experiments have been conducted by adding lime to the black cotton soil mixed with varied percentages i.e., 0%, 5%, 10%, 15% and 20% of bagasse ash to ameliorate the properties of black cotton soil stabilized along with bagasse ash. Microstructural characterisation is done by X-ray Diffraction, Energy Dispersive X-Ray Spectroscopy coupled Field emission the scanning electron microscopy (FE-SEM) and Fourier Transform Infrared (FTIR) analyses were done to examine the changes caused by the additives. This phenomenon is keenly examined with FE-SEM images by analysing them using digital imaging technique. The imaging technique carried out using Image J, depicts the reduction in void spaces and identi ed that lime has a perceptible in uence in the formation of stable and dense structure of black cotton soil stabilized with bagasse ash rather than stabilizing the black cotton soil with bagasse ash alone. In extension to these studies new technique in analysing the shrinkage properties using Python was proposed and the results have been upheld with Image J measurements. Based on the analysis of experimental results, it was found that with inculcation of portlandite rich hydrated lime, better reactivity is resulted in enhancing the engineering characteristics of the black cotton soil rather than utilization of bagasse ash alone in the stabilization of black cotton soil

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Effect of site, silviculture and tree social status on internal checking variation in plantation-grown Eucalyptus nitens

Rocha-Sepúlveda,

Vega,

Williams

et al. 2024

Australian Forestry

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R-based image analysis to quantify checking and shrinkage from wood wedges

Cited by 5 publications

References 28 publications

Assessing Treatments to Mitigate End-Face Cracking in Air-Dried <em>Acacia dealbata </em>Logs

Assessing Treatments to Mitigate End-Face Cracking in Air-Dried <em>Acacia dealbata </em>Logs

Microstructural characterization of lime modified bagasse ash blended expansive clays using digital image analysis

Effect of site, silviculture and tree social status on internal checking variation in plantation-grown Eucalyptus nitens

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