Román Martínez Carlos, Nuñez de la Rosa Yamid E, Estrada Luna Daniela, Baldovino Jair Arrieta, Jordi Bruschi Giovani
Applied Geotechnical Research Group, Department of Civil Engineering, Universidad de Cartagena, Cartagena de Indias 130015, Colombia.
Faculty of Engineering and Basic Sciences, Fundación Universitaria Los Libertadores, Bogotá 110231, Colombia.
Materials (Basel). 2023 Jul 13;16(14):4983. doi: 10.3390/ma16144983.
The porosity-to-cement index (η/C) has been extensively applied to study the evolution of different types of soil stabilization. However, this index has still not been used to characterize soils cemented with crushed limestone waste (CLW). In this sense, this paper sought to analyze the applicability of the porosity-to-cement index over the unconfined compressive strength (qu) and initial stiffness at small deformations (Go) of clayey soil improved with CLW and Portland cement. In addition, a microstructural analysis (SEM and EDX tests) was also conducted. CLW addition increased soil strength and stiffness over time. Moreover, qu and Go compacted mixtures containing CLW have established a distinctive correlation. Chemical microanalyses have uncovered a complex interfacial interaction between the soil, cement, and fine CLW particles, leading to a notable reduction in porosity.
孔隙率与水泥指数（η/C）已被广泛应用于研究不同类型土壤稳定化的演变。然而，该指数仍未用于表征用碎石灰石废料（CLW）胶结的土壤。从这个意义上讲，本文旨在分析孔隙率与水泥指数对用CLW和波特兰水泥改良的黏性土的无侧限抗压强度（qu）和小变形初始刚度（Go）的适用性。此外，还进行了微观结构分析（扫描电子显微镜和能谱分析测试）。随着时间的推移，添加CLW提高了土壤的强度和刚度。此外，含有CLW的压实混合物的qu和Go之间建立了独特的相关性。化学微观分析揭示了土壤、水泥和细CLW颗粒之间复杂的界面相互作用，导致孔隙率显著降低。
