Influence of hemp shiv, cement, and water content on the properties of lightweight hemp composites produced using different sizes of hemp shiv

IF 1.4 4区工程技术

Revista de la Construccion Pub Date : 2022-01-01 DOI:10.7764/rdlc.21.3.570

M. Şahin

引用次数: 0

Abstract

This study investigated the production and properties of lightweight hemp composites produced using waste industrial hemp stems cultivated in Turkey. Hemp stems were separated from their fibers and fragmented to obtain hemp shiv aggregates in the laboratory. Twelve mixtures were prepared with varied volumetric ratios of hemp: cement (H:C) and hemp: water (H: W) using different sizes of hemp shiv. The influence of mix proportions on the physical and mechanical properties of hemp composites were investigated. Besides, microstructure of hemp composites was examined. The hemp composites produced were in the apparent density range of 312 to 928 kg/m3 and exhibited 0.20 to 1.24 MPa compressive strength. The water absorptions of samples were in the range of 3.47 and 8.50 kg/m2.h1/2. The apparent density and compressive strength of hemp composites decreased with the increase of H:C ratio, but this situation is the opposite for increase of H: W ratio and hemp shiv size. Besides, increase in H:C ratio or hemp shiv size caused higher water absorptions.

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用不同尺寸的大麻叶制备轻质大麻复合材料，研究了大麻叶、水泥和含水量对其性能的影响

本研究考察了利用土耳其种植的废工业大麻茎生产的轻质大麻复合材料的生产和性能。大麻茎从纤维中分离出来，碎片化，在实验室中获得大麻叶聚集体。采用不同尺寸的大麻杆，制备了不同体积比的大麻:水泥(H:C)和大麻:水(H: W)的12种混合物。研究了不同配比对大麻复合材料物理力学性能的影响。此外，还对大麻复合材料的微观结构进行了检测。制备的大麻复合材料表观密度为312 ~ 928 kg/m3，抗压强度为0.20 ~ 1.24 MPa。样品的吸水率为3.47 ~ 8.50 kg/m2. h2 /2。麻料复合材料的表观密度和抗压强度随着H:C比的增大而减小，而H: W比和麻料尺寸的增大则相反。此外，H:C比的增加或麻叶尺寸的增大均会导致吸水率的增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Revista de la Construccion 工程技术-工程：土木

CiteScore

2.30

自引率

21.40%

发文量

期刊介绍： The Journal of Construction is aimed at professionals, constructors, academics, researchers, companies, architects, engineers, and anyone who wishes to expand and update their knowledge about construction. We therefore invite all researchers, academics, and professionals to send their contributions for assessment and possible publication in this journal. The publications are free of publication charges. OBJECTIVES The objectives of the Journal of Construction are: 1. To disseminate new knowledge in all areas related to construction (Building, Civil Works, Materials, Business, Education, etc.). 2. To provide professionals in the area with material for discussion to refresh and update their knowledge. 3. To disseminate new applied technologies in construction nationally and internationally. 4. To provide national and foreign academics with an internationally endorsed medium in which to share their knowledge and debate the topics raised.