Plasticity is an essential property of clay that determines its suitability for water filtration. There are no published works on the plastic behavior of clays from the study locations. The plastic behavior of seven Nigerian clays was examined using plasticity indices and compressive stress parameters in relation to chemical compositions and moisture content. The objective is to determine plastic behavior of some Nigerian clays and their suitability in production of Expanded Clay Aggregates (ECA) for water filters. Compressive stresses and deformation parameters were determined experimentally and compared theoretically. Atterberg limits (D 4318) were used to determine the plasticity indices. Chemical compositions of the samples were examined with XRF and correlated with plasticity and mineral contents of the clays. The clays are aluminosilicates with SiO₂/Al₂O₃ ratio of 1.61 to 3.03 and plastic indices of 8 to 49. Low plastic indices (8–11) and low compressive stresses parameters were observed for kaolinite clays (0.002 MPa) due to their low affinity for water while zeolite rich clays showed high plastic indices (46 and 49) for Obowo and Minna and sharp difference in their compressive stresses parameters (0.15 and 0.03 MPa) at optimum moisture contents of 57% and 53%, respectively. Despite varying moisture content, chemical and mineral compositions, all curves showed similar trends apart from kaolinites at 40% moisture content. Relationships exist among microstructural properties, chemical composition, moisture content, compressive strength, and plasticity indices of the clays. The plastic behaviors show they are suitable for development of ECA for water filters.

可塑性是粘土的一个基本特性，决定了其是否适合水过滤。目前还没有关于研究地点粘土塑性行为的发表著作。使用与化学成分和水分含量相关的塑性指数和压应力参数检查了七种尼日利亚粘土的塑性行为。目的是确定一些尼日利亚粘土的塑性行为及其在生产水过滤器用膨胀粘土骨料 (ECA) 中的适用性。压应力和变形参数通过实验确定并进行理论比较。阿特伯格极限 (D 4318) 用于确定塑性指数。使用 XRF 检查样品的化学成分，并将其与粘土的可塑性和矿物质含量相关联。该粘土为硅铝酸盐，SiO ₂ /Al ₂ O ₃比为 1.61 至 3.03，塑性指数为 8 至 49。由于高岭石粘土 (0.002 MPa) 的特性，观察到低塑性指数 (8-11) 和低压应力参数。 Obowo 和 Minna 对水的亲和力较低，而富含沸石的粘土则表现出较高的塑性指数（46 和 49），并且在最佳含水量分别为 57% 和 53% 时，它们的压应力参数（0.15 和 0.03 MPa）存在显着差异。尽管水分含量、化学和矿物成分各不相同，但除了水分含量为 40% 的高岭石外，所有曲线都显示出相似的趋势。粘土的微观结构特性、化学成分、含水量、抗压强度和塑性指数之间存在关系。塑料行为表明它们适合开发用于水过滤器的 ECA。