生物聚合物是天然来源的聚合物,对环境友好,碳中性和能源强度较低的添加剂,可用于各种岩土工程应用。像黄原胶这样的生物聚合物,角叉菜胶,壳聚糖,琼脂,结冷胶和明胶已显示出改善路基强度的潜力,抗侵蚀性,作为运河衬砌和斜坡稳定。但是对纤维素基生物聚合物的研究很少,特别是微晶纤维素(MCC),它们在岩土工程和地质环境工程中的应用。在这项研究中,MCC对高岭土岩土性质选择的影响,一个弱者,高度可压缩的粘土,比如它的液体和塑料极限,压实行为,变形行为,无侧限抗压强度(UCS)和时效,被调查。MCC以土壤干重的0.5、1.0、1.5和2%的剂量使用,样品制备采用干混法。结果表明,液限略有增加11%,但塑性指数比未处理的高岭土高近74%。MCC使处理后的土壤更坚硬,这反映在变形模量上,随着处理样品的剂量和年龄的增加。高岭土的UCS随掺量和固化时间的增加而增加。在90天固化期,对于2%MCC的剂量观察到最大UCS。处理过的高岭土的刚度和强度随着老化而增加,这表明MCC可以成为潜在的土壤稳定剂。
Biopolymers are polymers of natural origin and are environmentally friendly, carbon neutral and less energy-intense additives that can be used for various geotechnical applications. Biopolymers like xanthan gum, carrageenan, chitosan, agar, gellan gum and gelatin have shown potential for improving subgrade strength, erosion resistance, and as canal liners and in slope stabilization. But minimal research has been carried out on cellulose-based biopolymers, particularly microcrystalline cellulose (MCC), for their application in geotechnical and geo-environmental engineering. In this study, the effect of MCC on select geotechnical properties of
kaolin, a weak, highly compressible clay soil, like its liquid and plastic limits, compaction behavior, deformation behavior, unconfined compression strength (UCS) and aging, was investigated. MCC was used in dosages of 0.5, 1.0, 1.5 and 2% of the dry weight of the soil, and the dry mixing method was adopted for sample preparation. The results show that the liquid limit increased marginally by 11% but the plasticity index was nearly 74% higher than that of untreated
kaolin. MCC rendered the treated soil stiffer, which is reflected in the deformation modulus, which increased with both dosage and age of the treated sample. The UCS of
kaolin increased with dosage and curing period. The maximum UCS was observed for a dosage of 2% MCC at a 90-day curing period. The increase in stiffness and strength of the treated
kaolin with aging points out that MCC can be a potential soil stabilizer.