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Review on the Expansion Mechanism of Cement Paste Mixed with MgO-type Expansion Agent |
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Abstract: In this paper, the research origin of MgO-type expansion agent(MEA), the state of study on expansion mechanism of cement paste mixed with MEA, the factors, such as curing temperature, MgO calcination system and verities of cement effecting of cement paste mixed with MEA on the expansion performance were reviewed. And the expansion mechanism of cement paste mixed with MEA was discussed. The deficiency of current mechanism is confusing the conceptions between MgO hydration and expansion mechanism in cement paste and the expansion mechanism of cement paste mixed with MEA, which is severely hindering the development of the expansion mechanism of cement paste mixed with MEA and disadvantage to instruct practical engineering. Only the expansion mechanism of cement paste mixed with MEA can fully instruct practice engineering, whereas, it is essential to investigate the hydration and expansion mechanism of MgO in cement and properties of cement paste effecting of cement paste mixed with MEA on the expansion performance to perfect the mechanism.
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Received: 20 April 2009
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