ABSTRACT

Faidherbia albida is a typical emblematic species of African dryland areas. In Chad, it is used for many purposes, but very little is known about the technological properties of its wood, which sometimes leads to inappropriate uses. This work consisted to study the physical and mechanical properties of this wood, collected in the Sahelian and Sudanian chadian zone. As well as the impact study of the sampling areas of these properties. The result obtained shows that, the density, infradensity; modulus of elasticity, compression strength were significantly higher in the Sahelian zone than in the Sudanian zone, i.e. 508 and 409 kg·m⁻³; 5555 and 23.7 MPa, compared to 444 and 359 kg·m⁻³; 4150 and 19.6 MPa. The total tangential shrinkage, total volumetric shrinkage, fibre saturation point; static bending strength were significantly lower in wood from the Sahelian zone compared to the Sudanian zone, i.e. 4.6%, 7.7%, 23.7%; 42.5 MPa, compared to 6.6%, 9.5%, 28.9%; 52.6 MPa. The total radial shrinkage values obtained were not significantly different between the two provenances (mean: 3.1%).

摘要

Faidherbia albida是非洲旱地地区典型的标志性物种。在乍得，它被用于多种用途，但人们对其木材的技术特性知之甚少，这有时会导致不当使用。这项工作包括研究在萨赫勒和苏丹乍得地区采集的这种木材的物理和机械特性。以及对这些属性的采样区域的影响研究。得到的结果表明，密度，亚密度；萨赫勒地区的弹性模量、抗压强度明显高于苏丹地区，分别为508和409 kg·m ⁻³；5555 和 23.7 MPa，与 444 和 359 kg·m 相比^-3; 4150 和 19.6 MPa。总切向收缩率、总体积收缩率、纤维饱和点；与苏丹地区相比，萨赫勒地区木材的静态弯曲强度明显较低，分别为 4.6%、7.7%、23.7%；42.5兆帕，对比6.6%、9.5%、28.9%；52.6兆帕。获得的总径向收缩值在两个来源之间没有显着差异（平均值：3.1%）。