Improved Mechanical and Fatigue Durability of Cement-Stabilized Recycled Concrete Aggregate–Lateritic Soil Using Natural Rubber Latex

This study explores the efficacy of Natural Rubber Latex (NRL) as an additive in enhancing the mechanical properties and durability of cement-stabilized Recycled Concrete Aggregate (RCA) and Lateritic Soil (LS) blends for pavement applications. The research focused on determining the optimal NRL content and evaluating the performance of the stabilized blends under environmental stress represented by wetting–drying (w-d) cycles. Unconfined Compressive Strength (UCS) and Indirect Tensile Strength (ITS) tests were conducted alongside Scanning Electron Microscopy (SEM) to assess the microstructural integrity of the materials. The results demonstrated that the inclusion of NRL at a 5% rubber-to-cement (r/c) ratio significantly improved the initial UCS, ITS, fatigue life, and durability performance of the RCA:LS blends. The 70:30 RCA:LS blend outperformed the 50:50 blend, indicating a composition-dependent response to NRL addition. The findings suggest NRL's potential in sustainable pavement construction, with implications for enhancing strength in stabilized pavement materials.