An experimental investigation was undertaken to evaluate the potential use of poplar by-products in cement mortars. Two by-products from poplar processing were studied: sawdust (from sawing wood) and milled fibres (from wood waste obtained during cutting). Poplar fibres and sawdust were incorporated into mortars as sand volume substitution with rates ranging from 0 to 100%. Before introduction into the mortar, poplar aggregates were characterized (morphology and water absorption). It appeared that these wood aggregates absorb very quickly a large amount of water (up to 200%). The introduction of these poplar by-products has significant effects on the composite properties in both fresh and hardened states. It was noted that the workability of the mixtures with the poplar wood varies with the substitution rate. The inhibition of cement setting with poplar sawdust is characterized by maturity tests and affects the mechanical properties of mortars. In addition, increasing the poplar aggregates content causes a continuous increase of the material porosity, which leads to a decrease in density. Besides, it appears that the incorporation of poplar aggregates into mortars also decrease their thermal conductivities, which would help to reduce building heat losses. A significant decrease in the mechanical properties of poplar-based mortars was also noted, related to the rate of fibres or sawdust introduced into mixtures. The hydration disturbances, the high internal porosity of the wood particles and their low density can explain these lower mechanical strengths. However, despite these disturbances, the valorisation of poplar wood by-products remains possible in cementitious materials for the manufacture of concrete masonry blocks.

进行了一项实验研究，以评估杨木副产品在水泥砂浆中的潜在用途。研究了来自杨木加工的两种副产品：锯末（锯木）和磨碎的纤维（锯切过程中产生的木材废料）。将白杨纤维和锯末掺入砂浆中，作为砂体积的替代物，掺量范围为0％至100％。在引入砂浆之前，先对杨树聚集体进行了表征（形貌和吸水率）。这些木材聚集体似乎很快吸收了大量的水（高达200％）。这些杨树副产物的引入对新鲜状态和硬化状态下的复合材料性能均具有显着影响。注意到与杨木的混合物的可加工性随替代率而变化。杨木锯末对水泥凝结的抑制作用是通过成熟度测试来表征的，并且会影响砂浆的机械性能。另外，增加杨树聚集体的含量导致材料孔隙率的连续增加，这导致密度降低。此外，似乎将杨树骨料掺入砂浆中也会降低其热导率，这将有助于减少建筑物的热损失。还注意到杨木基砂浆的机械性能显着下降，这与引入混合物中的纤维或木屑的速率有关。水合扰动，木材颗粒的内部高孔隙率和较低的密度可以解释这些较低的机械强度。但是，尽管有这些干扰，