Lightweight masonry bricks produced from wood industry waste

ABSTRACT The main objective of this work was to investigate the use of cement-wood composites to produce lightweight masonry elements, aiming to reduce environmental damages arising from the disposal of the sawdust originated from wood sawing process. Physical (moisture content, water absorption, void ratio and specific gravity) and mechanical (compressive strength and dynamic Young’s modulus) properties of different cement:sand, cement:sand:sawdust and cement:sawdust mix proportions were evaluated. Specific gravity, moisture content, water absorption and compressive strength of 90 × 90 × 190 mm bricks, produced from selected mix proportions, were determined and compared to the requirements of the Brazilian standards for masonry elements. The satisfactory results obtained indicate that lightweight masonry bricks produced with wastes from wood industry have the potential to become an alternative for traditional building materials.

摘要
本研究的核心目标为探究水泥基木材复合材料（cement-wood composites）制备轻质砌体构件的应用可行性，以期缓解木材锯切工序产生的锯屑处置所引发的环境破坏。本研究对多种水泥-砂、水泥-砂-锯屑及水泥-锯屑配合比下的材料物理性能（含水率、吸水率、孔隙率与比重）与力学性能（抗压强度、动态杨氏模量（dynamic Young’s modulus））开展了测试评估。针对经筛选的配合比制备的90×90×190毫米砌体砖，本研究测定了其比重、含水率、吸水率与抗压强度，并与巴西砌体构件相关标准的要求进行了比对。本次研究获得的优异结果表明，以木材工业废弃物制备的轻质砌体砖，有望成为传统建筑材料的替代方案。