Development and Characterization of a Micro-Concrete Based on Wood Waste from Sawmills

Rachel Raïssa Ngono Mvondo, René Oum Lissouck, Sophie Grigoletto
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Abstract

An experimental study was carried out to evaluate the feasibility of using concrete compositions containing waste wood for structural and non-structural building applications. First, the inert and wood aggregates used in the composite design were characterized. Five compositions containing a reference, 50% and 100% of wood particles were then produced and characterized in terms of physical and mechanical performance (e.g., apparent density, abrasion, compressive strength, and flexural strength). The selected specimens were used for additional experimental tests. These included water absorption and thermal tests. Increasing wood waste content considerably lower compressive and flexural strengths while improving the thermal insulation quality of wood waste-cement composite. The durability assessment of selected compositions further showed that the abrasion resistance of manufactured specimen decreased by adding wood waste in the cement matrix while there was an increase of the capillarity absorption coefficients. It appears that the incorporation of waste wood particles into mortars decrease their thermal conductivities to 0.3 W/mK. The use of wood waste treated by a lime solution improves the studied properties.
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基于锯木厂木材废料的微混凝土的开发与表征
我们开展了一项实验研究,以评估在结构性和非结构性建筑应用中使用含废旧木材的混凝土成分的可行性。首先,对复合设计中使用的惰性和木质骨料进行了鉴定。然后生产了五种含有参考、50% 和 100%木质颗粒的组合物,并对其物理和机械性能(如表观密度、耐磨性、抗压强度和抗折强度)进行了表征。选定的试样用于其他实验测试。这些试验包括吸水性和热试验。增加木质废料的含量大大降低了抗压强度和抗折强度,同时提高了木质废料-水泥复合材料的隔热性能。对所选成分进行的耐久性评估进一步表明,在水泥基质中添加木质废料后,制造试样的耐磨性下降,而毛细管吸收系数却增加了。看来,在灰泥中加入废木屑会将其导热系数降低到 0.3 W/mK。使用经石灰溶液处理的废木料可改善所研究的特性。
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