Effect of Surface Treatment on the Transport Properties of Hardened Sulphoaluminate Cement Pastes after Carbonation
- DOI
- 10.2991/978-94-6463-658-1_67How to use a DOI?
- Keywords
- Sulphoaluminate cement; surface treatment; carbonation; transport properties
- Abstract
Sulphoaluminate (CSA) cement has the advantage of fast-hardening and high early-strength, but the carbonation resistance is relatively poor. In order to enhance the impermeability of carbonated CSA cement pastes, this paper investigates the effects of ethyl orthosilicate (TEOS) surface treatment with and without the pretreatment of calcium formate solution (10 wt.%) on the impermeability of carbonated CSA cement pastes. The results showed that the TEOS surface treatment without pretreatment would reduce the water absorption of the uncarbonated CSA cement pastes by only ~ 6.3%, and water absorption of the carbonated CSA cement pastes was reduced even less, as respected. However, the water absorption of (un)carbonated CSA cement pastes was significantly reduced by the TEOS treatment with the pretreatment of calcium formate solution (by ~ 38.7% and ~ 42.7%, respectively). Rietveld analysis of their X-ray diffraction patterns showed that the pretreatment of calcium formate solution would significantly reduce the content of ettringite of hardened CSA cement pastes by 63%, and increase the amorphous amount by 40%. The further surface treatment of TEOS would hardly change the phase assemblage any more. This means that the pretreatment of calcium formate solution could be an important reason for the reduction in the water absorption. A new method that can significantly enhance the impermeability of carbonated CSA cement pastes is proposed, which can provide an important basis for surface strengthening and durability enhancement of in-service CSA cement structures.
- Copyright
- © 2025 The Author(s)
- Open Access
- Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.
Cite this article
TY - CONF AU - Minghao Mu AU - Xiaojun Hao AU - Hongbo Cao AU - Chongyu Huang PY - 2025 DA - 2025/03/03 TI - Effect of Surface Treatment on the Transport Properties of Hardened Sulphoaluminate Cement Pastes after Carbonation BT - Proceedings of the 2024 10th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2024) PB - Atlantis Press SP - 655 EP - 666 SN - 2352-5401 UR - https://doi.org/10.2991/978-94-6463-658-1_67 DO - 10.2991/978-94-6463-658-1_67 ID - Mu2025 ER -