Research and Application of Slag–Nanosilica Stabilizer for Silt Subgrade

With the rapid development of construction and road engineering, accumulation silting waste soil is becoming more serious. In order to recycle silt, a new type stabilizer was developed in this study improve its mechanical properties applicability on roads. The optimal ratio components determined by orthogonal test grey correlation analysis. effects macroscopic silt were investigated unconfined compressive strength (UCS) split test. water stability freeze–thaw cycle carried out durability performance stabilized soil. Scanning electron microscopy (SEM) X-ray diffraction (XRD) methods used effect microstructure mechanism silt. results showed that mixture quicklime: nanosilica: slag = 32:3:65. Adding 10% reasonable effective method strengthen which has characteristics high strong early period. addition will result hydration reaction, pozzolanic cation exchange surface particles with enhance intermolecular force particles, reduce porosity soil, connection between particles.