A Study on the Activation of Carbide Slag Cementitious Materials
- 10.2991/coal-18.2018.44How to use a DOI?
- filling material, orthogonal testing, hydration mechanism, microscopic analysis
This research used orthogonal testing methods to study the effect of stimulator content on the properties of carbide slag (CS) cementitious materials. Range and variance analyses reveal that different stimulators do not significantly affect the consistencies and setting times of these cementitious materials, but influenced considerably their flexural and compressive strengths; the influence decreases in the order: NaOH> CaCl2> Na2SO4> Na2SiO3. Further analyses show that the strengths of these cementitious materials increase with increasing NaOH content, and decrease with increasing CaCl2 content. When the mass ratio of Na2SO4: Na2SiO3: CaCl2: NaOH was 1: 1: 0: 5, the stimulators exhibited the best activating effect. X-ray diffraction (XRD) and Scanning electron microscope (SEM) analyses showed that the 28-day hydration products contain large amounts of ettringite (AFt), calcium silicate hydrate (C-S-H), calcium aluminate hydrate (C-A-H), and small amounts of unreacted Ca(OH)2 and quartz. These hydration products increased the strengths of these cementitious systems.
- © 2018, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Mingyue Wu AU - Xiangming Hu AU - Qian Zhang AU - Weimin Cheng AU - Lin Xin AU - Yanyun Zhao PY - 2018/10 DA - 2018/10 TI - A Study on the Activation of Carbide Slag Cementitious Materials BT - Proceedings of the 9th China-Russia Symposium "Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protection" (COAL 2018) PB - Atlantis Press SP - 235 EP - 242 SN - 2352-5401 UR - https://doi.org/10.2991/coal-18.2018.44 DO - 10.2991/coal-18.2018.44 ID - Wu2018/10 ER -