Fibre-Reinforced Clay Blended with By-Product Cementitious Materials

Clayey soils experience strength and volume changes due to moisture and temperature variations. High cement content improves their mechanical properties, but environmental concerns call for greener techniques using industrial by-products and synthetic fibers. This study investigates polypropylene and glass fiber-reinforced cement-clay mixtures with GGBS, lime, and micro silica. Tests on unconfined compressive strength, linear expansion, and microstructure reveal that increasing fiber content enhances strength while reducing linear expansion. Fiber-reinforced mixtures meet ASTM standards for minimum compressive strength after 7 and 14 days of curing. This eco-friendly approach has potential for various subgrade reinforcement applications.