Effect of Activator Type on the High-Temperature Properties of Alkali-Activated Slag Cementing Fluid
The type of activator has a significant impact on the performance of alkali-activated slag, and there is little research on the effect of activator type on the high-temperature performance of alkali-activated slag. The effects of activator type on the thickening time, compressive strength, and rheological properties of alkali-activated slag under a high-temperature condition were studied in this article. Six activators were designed using Ca(OH)<sub>2</sub>, Na<sub>2</sub>CO<sub>3</sub>, and Na<sub>2</sub>SO<sub>4</sub> and their combination. The results show that there are obvious differences for the thickening time, compressive strength, and rheological properties of alkali-activated slag with different activators. In addition, the effect of activator type on AAM performance at elevated temperatures is distinct from that observed at room temperature. Among alkali-activated slag with six different activators, Ca(OH)<sub>2</sub>-Na<sub>2</sub>SO<sub>4</sub>-activated slag has the best performance by considering the properties of thickening time, strength, and rheology under high temperatures. The low alkalinity of Na<sub>2</sub>SO<sub>4</sub>, producing NaOH by the reaction of Ca(OH)<sub>2</sub> and Na<sub>2</sub>SO<sub>4</sub>, and the reaction rate of Ca(OH)<sub>2</sub> and Na<sub>2</sub>SO<sub>4</sub> can easily be controlled by the retarder, which may be responsible for the excellent performance of Ca(OH)<sub>2</sub>-Na<sub>2</sub>SO<sub>4</sub>-activated slag.
Authors
- Shenglai Guo
- Yuanhai Zhang (ORCID: https://orcid.org/0009-0004-5387-9503)
- Danzhu Zheng (ORCID: https://orcid.org/0000-0003-4965-5385)
- Yang Li (ORCID: https://orcid.org/0000-0003-4308-6716)
- Ye Zhang (ORCID: https://orcid.org/0000-0003-2033-7164)
- Rong Wang (ORCID: https://orcid.org/0000-0002-7157-6037)
- Jiajun Tang (ORCID: https://orcid.org/0000-0003-0178-0603)
Institutions
- China University of Petroleum, Beijing (CN)
- GA Drilling (Slovakia) (SK)
- China University of Petroleum, East China (CN)
- University of Tulsa (US)
- China National Petroleum Corporation (China) (CN)
Publication Details
- Journal
- ACS Omega
- Published
- 2024-12-18
- DOI
- https://doi.org/10.1021/acsomega.4c08483
- Citations
- 2
- Primary Topic
- Concrete and Cement Materials Research
- Type
- article
- Field-Weighted Citation Impact
- 0.52
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Shandong Province