麦秸秆加筋材料抗拉性能的实验研究

加筋作用取决于筋材间的交织作用、筋土间的摩擦作用,以及加筋材料自身的抗拉性能。利用扫描电镜观察天然和经高分子材料SH胶浸泡后麦秸秆的结构,发现麦秸秆孔隙中渗入了胶液,并在麦秸秆的内外表面形成了胶膜。通过拉伸实验,测试了无茎节和1茎节麦秸秆在天然、浸海水、浸胶及浸胶后再浸海水4种工况下的极限拉力和极限延伸率。结果表明,无茎节麦秸秆的极限拉力和极限延伸率均高于1茎节麦秸秆的;浸胶与天然麦秸秆、浸胶干燥后再浸海水与直接浸海水的麦秸秆相比,前者的极限拉力和极限延伸率均高于后者,说明SH胶浸泡麦秸秆,使其抗拉性能得到增强。

Research on tensility of wheat straw for reinforced material

Strength and stability of reinforced soil depends on intercrossing and tensility of reinforced materials, and friction between reinforced material and soil. By means of SEM photos, it is observed that SH agent is infiltrated through the pore of wheat straw, and adhered to its surface. For studying its tensility, maximum tensile and elongation of wheat straw with one stem node and without stem node, is tested in the condition of original, soaked in sea water, marinated in SH agent, and soaked in sea water after marinating in SH agent. It has been certified that the maximum tensile and elongation of wheat straw without stem node is more than that of wheat straw with one stem node. Respectively comparison on the marinated in SH agent and original, and soaked in sea water after marinating in SH agent and soaked in sea water, the maximum tensile and elongation of wheat straw marinated in SH agent is more than that of original wheat straw. SH agent benefits to increase the tensility of wheat straw.