Study on Expansion of Cement-Based Material with Addition of Magnesium Oxide
| Periodical | Materials Science Forum (Volumes 610 - 613) |
|---|---|
| Main Theme | Materials Research |
| Edited by | Zhongwei Gu, Yafang Han, Fusheng Pan, Xitao Wang, Duan Weng and Shaoxiong Zhou |
| Pages | 968-974 |
| DOI | 10.4028/www.scientific.net/MSF.610-613.968 |
| Citation | Ke Chen et al., 2009, Materials Science Forum, 610-613, 968 |
| Online since | January, 2009 |
| Authors | Ke Chen, Chang Hui Yang, Fang Wu, Jian Xiong Ye, Shu Ang Zhao, Xiao Bin Xiang |
| Keywords | Calcium, Expansion, Heavy Burning, Light Burning, MgO Expanding Agent, Sulphoaluminate Expanding Agent |
| Price | US$ 28,- |
In this paper, the influence of the types and addition dose of MgO expanding agent and the age of cement on expansion value and expansion performance of cement based material added with MgO expanding agent was systematically studied.The expansion characteristics of cement based material added with MgO expanding agent or calcium sulphoaluminate expanding agent were compared. The expansion of such material increases with the addition dose of MgO expanding agent and cement mortar age. During the test period, the expansion of cement based material increases continuously. The light-burned MgO expanding agent modified by CaO expanding agent is able to increase the 28d expansion of such material effectively. The temperature of calcination for the heavy-burned MgO expanding agent is higher than that of light-burned one, thus the heavy-burned MgO expanding agent has a rather dense structure with slow hydration rate and gives a small expansion of the cement based material at early age, showing an obvious expansion delay. The calcium sulphoaluminate expanding agent gives most expansion of the material in the early 28d and there is small expansion at middle and later age of the material.
