Effect of metakaolin on the structural build-up of cement paste

Author(s): Dajun Zhou, Qiang Yuan, Haomin Jiang, Jianwei Peng, Zhonghan Wang and Yang Liu
Paper category: Proceedings
Book title:4th International Symposium on Design, Performance and Use of Self-Consolidating Concrete
Editor(s): Caijun Shi & Zuhua Zhang, Hunan University, China
Kamal Henri Khayat, Hunan University, China
Missouri University of Science & Technology, USA
ISBN:978-2-35158-204-6
e-ISBN:978-2-35158-205-3
Publisher: RILEM Publications SARL
Publication year:2018
Pages:91-104
Total Pages:14
Language : English

Abstract: Static yield stress is an important rheological parameter of cement-based materials. The growth of static yield stress is often used to characterize the structural build-up/thixotropy of cement-based materials, which is crucial for the stability, shape-holding capacity and multi-layer casting. In this paper, static yield stress was measured every 15 min over 127 min. The dynamic yield stress and calorimetric curves were also measured. Cement pastes containing metakaolin (MK) and silica fume (SF) were studied. Results showed that the addition of MK increases the rate of structural build-up more than that of SF. This may because that paste with MK has higher mechanical efficiency of CSH than that with SF.

Online publication : 2018
Publication type : full_text
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