Micro-mechanism of Shear Strength and Water Stability Enhancement of Montmorillonite by Microwave Heating

Microwave heating potentially reinforces the muddy intercalation to eliminate slope failure. Montmorillonite has worst water resistance among components, which is a primary facet of inducing This study investigates mechanism shear strength and stability enhancement montmorillonite heated by microwave oven muffle furnace from room temperature 800 °C. Results show that mineralogical evolution can be divided into three stages: temperature-300 °C, 300-600 600-800 more efficient in heat treatment than makes dehydroxylated earlier. It worth noting hot spots formed inside specimens during treatment. significantly promotes montmorillonite, where maximum increases are 39.94% cohesion at 600 °C 20.54% internal friction angle 700 due rough surfaces large particles produced dehydroxylation Mg-Al spinel synthesis, significant degree disorder state MMT after also plays vital role. The microwave-heated over 500 presents good integrity immersion test 24 h. Considering behavior stability, we believe most reasonable interval for microwaves 500-600°C.