EVALUATION OF HEMP STRAW AND FIBRE STRENGTH
EVALUATION OF HEMP STRAW AND FIBRE STRENGTH
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发表时间：
2014
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通讯作者：
R. Berzins;A. Kakitis;U. Bērziņš;J. Čukurs
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作者：
R. Berzins;A. Kakitis;U. Bērziņš;J. Čukurs
近年来，人们对在复合材料应用中使用天然材料越来越感兴趣，其中纤维素材料在泡沫石膏基质中得到增强。其结果是环保的低密度建筑材料，具有高拉伸和压缩强度、良好的隔热和隔音性能。大麻（Cannabis sativa L.）纤维是天然纤维，其性能随植物生长地区气候条件、肥料、植物密度、收获时间和预处理工艺流程的不同而不同。本研究的目的是评估大麻秸秆和纤维的强度，以将其用于石膏加固。建立了在两个平行平面之间压缩样品的纵向和横向应力的大麻秸秆抗压强度。结果表明，‘Bialobrzeskie’品种纵向抗压强度平均为19.5 MPa，横向强度平均为1.33 MPa。品种“Futura 75”的纵向抗压强度为 23.1 MPa，横向强度为 1.32 MPa，品种“Santhica 27”的值为 26.4 MPa 和 1.55 MPa。确定了适合增强泡沫石膏纤维拉伸强度的大麻品种。各个样品的拉伸强度范围为 273 MPa 至 715 MPa。
In recent years, there is a growing interest for the use of natural materials in composite applications, where cellulose materials are reinforced in foam gypsum matrix. A result is environmentally friendly low density building material, which can show high tensile and compressive strength, good heat and sound insulation properties. Hemp (Cannabis sativa L.) fibres are natural fibres and their properties vary according to the plant growing regional climatic conditions, fertilizers, plant density, harvesting time and pre-treatment technological processes. The objective of the present research was to evaluate hemp straw and fibre strength to use them for gypsum reinforcement. Hemp straw compressive strength of longitudinal and transverse stresses compressing the samples between two parallel planes was established. The results show that the variety 'Bialobrzeskie' longitudinal compressive strength is 19.5 MPa on average, but the transversal strength of 1.33 MPa. Variety 'Futura 75' shoved longitudinal compressive strength 23.1 MPa, while the transverse strength is 1.32 MPa and variety 'Santhica 27' showed the values 26.4 MPa and 1.55 MPa. The hemp varieties that are suitable for reinforcement of foam gypsum fiber tensile strength were determined. The tensile strength of individual samples ranged from 273 MPa to 715 MPa.