Relationship between Crystalline Size, Activity and Expansive Properties of MgO Expansive Agent

DOI

10.2991/iccet-15.2015.250How to use a DOI?

Keywords

MgO expansive agent; calcination temperature; crystalline size; activity; expansive property

Abstract

The quantitative relationships between the calcination temperature and the crystalline characterization, the activity and the expansive properties of MgO expansive agent were explored through XRD-Scherrer formula, the citric acid method and the length measurement method. The results show that, under the same heat preservation time conditions, there exists exponential relationship between crystalline size and calcination temperature of MgO expansive agent, and exists linear relationship between the activity value of MgO expansive agent and the crystalline size of MgO crystal. Before 28 curing days, the expansion ratios of cement pastes possess logarithmic relationship with the activities of MgO expansive agent, while with the increase of curing age, specimens containing MgO of high activity values show faster increase rates in expansion ratio in 60~180d, and the relationship between the expansion ratio and the activity value of MgO expansive agent becomes more complicated.

Copyright

© 2015, 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/).

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TY  - CONF
AU  - Hua Li
AU  - Yongsheng Zhang
AU  - Qian Tian
AU  - Anqun Lu
PY  - 2015/11
DA  - 2015/11
TI  - Relationship between Crystalline Size, Activity and Expansive Properties of MgO Expansive Agent
BT  - Proceedings of the 5th International Conference on Civil Engineering and Transportation 2015
PB  - Atlantis Press
SP  - 1338
EP  - 1343
SN  - 2352-5401
UR  - https://doi.org/10.2991/iccet-15.2015.250
DO  - 10.2991/iccet-15.2015.250
ID  - Li2015/11
ER  -