Materials Reports  2019, Vol. 33 Issue (z1): 264-268 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Study on the Performance of Steel Slag and Fly Ash Modified Magnesium Phosphate Cements Under Different Curing Condition |
| DENG Kai1, LI Hongbin2, LI Xiang3, WU Kai3
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1 Technology Research and Development Center, China Resources Cement Holdings Limited, Guangzhou 510460
2 Sichuan Institute of Building Research,Chengdu 610081
3 School of Material Science and Engineering, Tongji University, Shanghai 201804 |
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Abstract Utilizing solid waste in preparing magnesium phosphate cement (MPC) can reduce its cost, and it is an important way to improve the performance. In this study, the effect of MgO to phosphate ratio on the setting time, fluidity and mechanical properties of prepared MPC were investigated. The performance of MPC containing steel slag and fly ash under different curing conditions were characterized. Results showed that: with the increase of M/P, the fluidity of MPC decreased and the setting time was shortened significantly. The compressive strength of MPC reached the highest at the M/P of 3. The samples made with steel slag showed poorer water resistance compared with that of fly ash blended system. The shrinkage of MPC mortar was also increased by increasing the amount of steel slag and fly ash when the specimens were cured in the air. However, the incorporation of steel slag and fly ash could reduce the shrinkage as the specimens stored in water, and the samples even exhibit expansion at late age.
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Published: 05 July 2019
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| About author:: Kai Deng is a senior engineer and deputy engineer of China Resources Cement Technology Research and Development Center, he engaged in the production and research of special cement and assembly building. He has participated in the 13th Five-Year Plan, 863 and other topics of the country. He has published 6 monographs and more than 10 papers.Xiang Li is a master student of Tongji University and has received outstanding graduates from Shanghai in 2016. He has participated in the 13th Five-Year Plan of National Key Research and Development. His main research direction is to prepare cement-based composite materials based on hydrogel, he has published a paper. |
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