Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8947087 | Construction and Building Materials | 2018 | 11 Pages |
Abstract
Adding cement in to reinforce soft soil has been a widely used technique in engineering projects. However, there exist great concerns over the issues of low early strength and massive resources consumption. This study tested a composite alkaline activator of sulfate and alkali aluminate in cemented soil by Unconfined Compressive Strength (UCS) test. Multiple analyses of X-ray Diffraction (XRD), Fourier Transform infrared spectroscopy (FT-IR), Thermo Gravity Analysis (TGA), Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS) and Mercury Intrusion Porosimetry (MIP) were carried out to explore the activation mechanisms of the activator under different additions over curing periods. Test results revealed that UCS of stabilized soil was greatly improved in especially early periods with proper activator dosages. Hydration and pozzolanic reaction extents were accelerated with proper additions, while significant retardation for products of hydration and pozzolanic products was observed with excessive dosages.
Related Topics
Physical Sciences and Engineering
Engineering
Civil and Structural Engineering
Authors
Fei Xu, Hua Wei, Wenxun Qian, Yuebo Cai,