植物纤维增强生土材料结构与性能

Structure and Properties of Stabilized Earth Materials Modified by Plant Fiber

在分析改性前后植物纤维表面性状差异的基础上,研究了植物纤维改性状况、种类和掺量对黄河泥沙基生土材料力学性能、耐水性和微观结构的影响.结果表明：黄麻纤维和秸秆纤维经过改性作用后,其表面积和粗糙度显著提高;当改性黄麻纤维掺量（体积分数）为0.8%~1.2%时,生土材料的力学性能和耐水性均显著提高;当掺入原状黄麻纤维时,生土材料的抗压强度随着其掺量的增加而降低;当掺入原状和改性秸杆时,生土材料的耐水性随着其掺量的增加而降低;改性黄麻纤维与基体材料之间黏结紧密,能起到增强生土材料的作用.

Effects of surface morphology and dosage of plant fiber on the mechanical property, water resistance and microstructure of stabilized earth materials prepared by the Yellow River sediment were discussed. The results show that based on the analysis of morphology differentia, surface area and roughness of the modified plant fiber increase obviously compared with the control. Mechanical properties and water resistance of stabilized earth materials improve obviously, when the modified jute fiber content（by volume） is in the 0.8%-1.2%. Relatively, the compressive strength of the stabilized earth materials decreases with the increasing of dosage of original jute fiber, the water resistance declines with the increasing of dosage of original and modified straw fiber. SEM morphology analysis of cross section indicates that modified jute fiber bonds closely with the matrix materials.