期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 229, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2019.116923
关键词
Hydration; Pore structure; Early age; Limestone powder wastes; Impedance
资金
- National Key R&D Program of China [2017YFB0310000]
- China Ministry of Science and Technology [2015CB655101]
- National Natural Science Foundation of China [51602229]
- Jiangsu Province Natural Science Foundation [BK20181187]
- State Key Laboratory of High Performance Civil Engineering Materials [2018CEM011]
This work systematically investigates the early hydration process and pore structure evolution of high limestone powder wastes content blended cement pastes by non-contact impedance measurement and microstructural tests. According to the evolution of impedance response, the early hydration process of blende cement pastes can be divided into four stages, denominated as dissolution, acceleration, dynamic balance and hardened stages, respectively. Dynamic balance stage not present in hydration process of pure cement, is a characteristic hydration stage for blended cement pastes. Furthermore, fractal approach for predicting the evolution of pore structure is proposed originally, based on the impedance results. (C) 2019 Elsevier Ltd. All rights reserved.
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