Abstract
Magnesium phosphate cement (MPC) belongs to the family of chemically bonded phosphate ceramics and exhibits certain outstanding qualities. The current study investigated the effects of steel slag powder (SSP) on the properties of MPC mortar. MPC mortar specimens with different content of SSP were prepared and their workability, mechanical properties and water resistance were tested. Moreover, microstructure and phase composition of MPC paste were examined by Scanning Electronic Microscopic (SEM) and X-ray diffraction (XRD) techniques. It was found that the incorporation of SSP can promote early hydration rate. A significant improvement in the later stage mechanical strength was observed but early strength was reduced. Water resistance of MPC mortar specimens was improved by increasing the percentage of SSP from 0% to 30%. Finally, XRD and SEM analysis of MPC pastes corroborated with the mechanical strength results and confirmed the formation of secondary reaction products along with the main hydration products struvite and residual magnesia.
| Original language | English |
|---|---|
| Pages (from-to) | 140-147 |
| Number of pages | 8 |
| Journal | Construction and Building Materials |
| Volume | 195 |
| DOIs | |
| Publication status | Published - 20 Jan 2019 |
| Externally published | Yes |
Keywords
- Magnesium phosphate cement
- Scanning electron microscopy
- Steel slag powder
- Water resistance
- X-ray diffraction
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- General Materials Science