麻屑尺寸对麻石灰复合材料湿热及力学性能的影响

Influence of Hemp Shives Size on Hygro-Thermal and Mechanical Properties of a Hemp-Lime Composite.

作者信息

Brzyski Przemysław, Gładecki Mateusz, Rumińska Monika, Pietrak Karol, Kubiś Michał, Łapka Piotr

机构信息

Faculty of Civil Engineering and Architecture, Lublin University of Technology, 40 Nadbystrzycka St., 20-618 Lublin, Poland.

Institute of Heat Engineering, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, 21/25 Nowowiejska St., 00-665 Warsaw, Poland.

出版信息

Materials (Basel). 2020 Nov 27;13(23):5383. doi: 10.3390/ma13235383.

DOI:10.3390/ma13235383

PMID:33260830

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7730858/

Abstract

Different fractions of hemp shives are used in the mixtures of the hemp-lime composite. The market offers shives of different granulation. It depends on the type of industrial hemp and on the capabilities of decortication machines. The aim of the research presented in the article is to check differences in the mechanical and hygro-thermal properties of composites with different shives fractions. The research part of the paper presents the preparation method and investigation on hemp-lime composites. Apparent density, total porosity, thermal conductivity, capillary uptake, vapor permeability, specific heat, mass absorptivity, flexural and compressive strength were examined. The results confirm that the shives fraction influences the individual properties of the composites. Hemp-lime composites with fine shives are characterized by higher water absorption, thermal conductivity, mechanical strength, vapor permeability as well as lower capillary-lifting capacity and specific heat than composites with thick shives.

摘要

大麻秸秆的不同级分被用于大麻-石灰复合材料的混合物中。市场上提供不同粒度的秸秆。这取决于工业大麻的类型和去皮机的性能。本文所呈现的研究目的是检验具有不同秸秆级分的复合材料在力学和湿热性能方面的差异。论文的研究部分介绍了大麻-石灰复合材料的制备方法和研究情况。对表观密度、总孔隙率、热导率、毛细吸水、蒸汽渗透性、比热容、质量吸收率、抗弯强度和抗压强度进行了检测。结果证实，秸秆级分影响复合材料的各项性能。与含有粗秸秆的复合材料相比，含有细秸秆的大麻-石灰复合材料具有更高的吸水率、热导率、机械强度、蒸汽渗透性，以及更低的毛细上升能力和比热容。