|
| Effect of Sodium Silicate Modulus on Properties of Red Mud Alkali-Activated Cementitious Materials |
| Received:February 19, 2020 Revised:February 25, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：doi：10.3969/j.issn.1007-7545.2020.09.021 |
| KeyWord:red mud; modulus; alkali-activated; mechanical properties; micro mechanism |
| Author | Institution |
| DANG Hai-xiao |
北京工业大学 交通工程北京市重点实验室 |
| ZHANG Jin-xi |
北京工业大学 交通工程北京市重点实验室 |
| WANG Jian-gang |
北京工业大学 交通工程北京市重点实验室 |
|
| Hits: 1951 |
| Download times: 1873 |
| Abstract: |
| In order to explore recovery and utilization of red mud, red mud based alkali-activated cementitious materials were prepared with sintered red mud as active materials and different modulus of water glass solution as activator. Mechanical properties and pore structure characteristics of cementitious materials were tested. Micro mechanism was explored by XRD, SEM and DTA. The results show that modulus of water glass has a big influence on properties of cementitious materials. Water glass with modulus of 0.96 has the best excitation effect, and compressive strength reaches 10.21 MPa in 28 d. Main source of strength of hardened specimen is calcium silicate hydrate. Higher strength materials have more fine microstructures and much more alkali-activated products. |
| Close |