Influence of Curing Temperature on the Deformation properties of Magnesium Oxide Micro-expansive Concrete
- DOI
- 10.2991/iccte-16.2016.91How to use a DOI?
- Keywords
- Curing temperature,magnesium oxide,free expansion rate,hydration rate,migration rat
- Abstract
The influence of curing temperature on the deformation properties of magnesium oxide(MgO) micro-expansive concrete were studied.Hydration mechanism and expansion characteristics of magnesium oxide(MgO) in cement paste were analyzed by XRD DSC-TG and SEM. Results indicated.Curing temperature had a great effect on free expansion ratio of MgO mortar, the higher the curing temperature, the bigger the early expansion, the sooner the inflation curves to stabilize.The rising of curing temperature accelerated the hydration rate of MgO and the formation of Mg(OH)2 crystals, because the increased temperature accelerated migration rate of Mg2+and OH-after the MgO hydrating ,and made the formation of Mg(OH)2 crystal to be accelerated accordingly and expansion effect in advance.With the risng of curing temperature, there were some changes in microstructure of Mg(OH)2,which the short lamellar crystals turned into fibrous.
- Copyright
- © 2016, 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 - Yun Dong AU - Jianfeng Zhang AU - Xia Chen AU - Huaquan Yang PY - 2016/01 DA - 2016/01 TI - Influence of Curing Temperature on the Deformation properties of Magnesium Oxide Micro-expansive Concrete BT - Proceedings of the 2016 International Conference on Civil, Transportation and Environment PB - Atlantis Press SP - 552 EP - 558 SN - 2352-5401 UR - https://doi.org/10.2991/iccte-16.2016.91 DO - 10.2991/iccte-16.2016.91 ID - Dong2016/01 ER -