ABSTRACT

The water/cement (w/c) ratio plays a critical role in the strength development of stabilised materials. The mechanical and durability properties of pavement materials are affected by the w/c ratio. The high water absorption of construction and demolition (C&D) materials, along with the importance of moisture content in achieving the targeted compaction density for these materials requires investigation of their optimum water/cement ratio, particularly for their usage in granular pavement layers. In this research, two types of cement being General purpose Portland cement and General purpose Blended cement were used to stabilise C&D materials. Geotechnical testing undertaken included grading, plasticity, maximum dry density, California Bearing Ratio and Unconfined Compressive Strength. By monitoring and limiting the w/c ratio of the blends, the UCS of cured cement-stabilised samples were analysed. The impact of moisture content on the performance of cemented gel under tension and flexural loading was characterised using the four-point beam test.

摘要

水/水泥 (w/c) 比在稳定材料的强度发展中起着至关重要的作用。路面材料的机械性能和耐久性能受水灰比的影响。建筑和拆除 (C&D) 材料的高吸水率，以及水分含量对于实现这些材料的目标压实密度的重要性，需要研究它们的最佳水/水泥比，特别是它们在颗粒路面层中的使用。在这项研究中，使用了两种类型的水泥，即通用波特兰水泥和通用混合水泥来稳定 C&D 材料。进行的岩土测试包括分级、可塑性、最大干密度、加州承载比和无侧限抗压强度。通过监测和限制混合物的水灰比，分析了固化后的水泥稳定样品的 UCS。使用四点梁试验表征了含水量对胶合凝胶在拉伸和弯曲载荷下性能的影响。