|
Microstructure and strength behavior of steel slag mortar containing waste sand |
|---|---|
| รหัสดีโอไอ | |
| Creator | J. Chanet |
| Title | Microstructure and strength behavior of steel slag mortar containing waste sand |
| Contributor | A. Jansamoot, A. Kerdkla, J. Ayawanna, S. Chaiyaput, N. Kingnoi |
| Publisher | The Microscopy Society of Thailand |
| Publication Year | 2563 |
| Journal Title | Microscopy and Microanalysis Research - The Journal of The Microscopy Society of Thailand |
| Journal Vol. | 33 |
| Journal No. | 1 |
| Page no. | 13-17 |
| Keyword | mortar, sand, steel slag, cement, compressive strength, microstructure |
| URL Website | https://ph02.tci-thaijo.org/index.php/mmres/index |
| Website title | Microscopy and Microanalysis Research - The Journal of The Microscopy Society of Thailand |
| ISSN | 2651-2297 (online) |
| Abstract | This study deals with the production of mortars containing steel slag (SS) as replacement of Ordinary Portland Cement (OPC) and mortars containing waste sand (WS) as an ordinary construction sand (CS). Four compositions of the mortar mixes of OPC:CS, OPC:WS, SS:CS and SS:WS were prepared in a weight ratio of 1:2.75 using a fixed water content of 0.485 by weight. The compressive strength and microstructure of samples from different aging time for 1, 7, 14 and 28 days in air and lime water were evaluated. The WS containing mortars showed higher flow percent values and longer setting time than the ordinary CS containing mortars. The compressive strength values of OPC mortars using CS mortars was better than those of slag mortars using CS and WS. The compressive strength increases with an increase in the curing time, the highest strength was 28 days-curing. Also, the mortars curing in air had higher compressive strength than the mortars curing in lime water. The observed microstructure revealed crystal-like calcium silicate hydrate (CSH) phase promoting strength in OPC mortars. Meanwhile, calcium hydroxide (Ca(OH)2)-like crystals and needle-like ettringite crystals were observed in the slag mortars with low strength of the slag mortars both curing in air and lime water. |
