Çetin Mustafa Yasin, Bağrıaçık Baki, Annagür Hatice Merve, Topoliński Szymon
Department of Civil Engineering, Faculty of Engineering, Çukurova University, Adana 01330, Turkey.
Department of Civil Engineering, Faculty of Engineering, Toros University, Mersin 33140, Turkey.
Polymers (Basel). 2024 May 7;16(10):1306. doi: 10.3390/polym16101306.
The geotechnical properties of clay soil and its mixtures with different proportions (0.75%, 0.85%, 1%, and 1.15%) of Agar Gum biopolymer and Ferrochromium Slag (0.25%, 0.50%, 0.75%, and 1%), having various curing times and freeze-thaw cycles, were studied through a series of soil mechanical tests to investigate possibilities to improve its undesired/problematic plasticity, compaction, and shear strength characteristics. The results revealed that treatment with an optimal ratio of 1% Agar Gum and 1% Ferrochromium Slag alone, as well as together with, improved the geotechnical properties of the clay soil considerably. Both the unconfined and shear strength properties, along with the cohesion and internal friction angle, increased as much as 47 to 173%, depending on the curing time. The higher the curing time, the higher the shear strength, cohesion, and internal friction angle are up to 21 days. Deteriorating the soil structure and/or fabric, freeze-thaw cycles, however, seem to have an adverse effect on the strength. The higher the freeze-thaw cycle, the lower the shear strength, cohesion, and internal friction angle. Also, some improvements in the plasticity and compaction properties were determined, and environmental concerns regarding Ferrochromium Slag usage have been addressed.
通过一系列土壤力学试验，研究了粘土及其与不同比例（0.75%、0.85%、1%和1.15%）的琼脂胶生物聚合物和铬铁渣（0.25%、0.50%、0.75%和1%）的混合物在不同养护时间和冻融循环下的岩土工程特性，以探讨改善其不良/有问题的可塑性、压实性和抗剪强度特性的可能性。结果表明，单独使用1%琼脂胶和1%铬铁渣的最佳比例进行处理，以及两者一起使用，都能显著改善粘土的岩土工程特性。根据养护时间的不同，无侧限强度和抗剪强度特性以及内聚力和内摩擦角提高了47%至173%。养护时间越长，抗剪强度、内聚力和内摩擦角越高，直至21天。然而，冻融循环似乎会破坏土壤结构和/或结构，对强度产生不利影响。冻融循环次数越多，抗剪强度、内聚力和内摩擦角越低。此外，还确定了可塑性和压实性的一些改善情况，并解决了有关铬铁渣使用的环境问题。
