Full Characterization of Erisma uncinatum Warm Wood Specie

Abstract

Wood is a material that for years has been used by man for a variety of purposes, particularly in rural and civil constructions. For the possibility of shortages of some wood species, the characterization of other little known species as alternatives is necessary. This research aimed to determine, with the aid of the Brazilian standard NBR 7190, physical and mechanical properties of Cambará rosa or Cedrinho wood (Erisma uncinatum Warm), and with the support of regression models (linear, exponential, geometric, logarithmic) based on analysis of variance (ANOVA), to estimate the values of strength and stiffness as a function of apparent density, for the density being a property of easy determination. Were obtained 12 determinations by physical and mechanical propertie, resulting in 204 experimental results. The mechanical properties of Erisma uncinatum Warm presented performance compatible with other species used in civil construction, but not being considered a high strength wood. By means of regression models to estimate the strength and stiffness values, it was found that no property can be estimated by the apparent density.

Influence of treatment with water-soluble CCB preservative on the physical-mechanical properties of brazilian tropical timber

“…Only CV calculated for tensile strength parallel to grain exceeded the limit stipulated by ABNT NBR 7190 28 . Strength in compression parallel to grain (f c0 ) obtained in this work, for the two treatment conditions, were higher than that presented by Lahr et al 31 . The same applies to strength in tension parallel to grain (f t0 ), to hardness parallel to grain (f H0 ), to conventional strength on static bending test (f M ) and to toughness (W).…”

“…According to Lahr et al 31 about complete characterization of Erisma uncinatum Warm, apparent density for this species at 12% moisture is 0.68 g/cm 3 , very close to the values found for the untreated material and with CCB-treated pieces. By Tukey's test, CCB treatment process did did not affect significantly apparent density of Cambará.…”

Properties of Eucalyptus umbra Wood for Timber Structures

“…For wood use as structural element in construction of bridges [7], trusses [8] among others [9], physical and mechanical properties are the most important [10][11][12].…”

Influence of Reinforcement on Wood Tensile Strength Submitted to Weathering

“…These wood species are suitable for structural purposes, such as, for beams. (Lahr et al, 2016;Coimbra et al, 2018). Forty-eight (48) test specimens were prepared to evaluate tensile strength parallel to grain, according to Annex B of Brazilian Standard ABNT NBR 7190 (1997).…”

“…Some works have characterized Erisma uncinatum species, though the studies didn't consider applying preservative treatment or any reinforcement on the wood surface. As a result, the studies found out values of tensile strength parallel to the grain [f t0 ] of 58 MPa and 45 MPa (Dias and Lahr, 2004;Lahr et al, 2016).…”