Study on the Mechanism of Magnesium Sulfate to Cement and C-S-H Gel

Xiu Juan Li

doi:10.4028/www.scientific.net/AMR.243-249.4687

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 243-249Study on the Mechanism of Magnesium Sulfate to...

Study on the Mechanism of Magnesium Sulfate to Cement and C-S-H Gel

Abstract:

The microstructure of cement test block and the C-S-H gel attacked by magnesium sulfate is observed by means of scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS)and X-ray diffraction(XRD).It is found that the presence of Mg²⁺ makes C-S-H gel decalcify, dissolve and decompose, which thereby increasing the erosion of SO₄^2- on the concrete. The decomposition of C-S-H and the generation of M-S-H result in the loss of concrete strength and the ultimate destruction of concrete.

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Periodical:

Advanced Materials Research (Volumes 243-249)

Pages:

4687-4690

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.243-249.4687

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Online since:

May 2011

Authors:

Xiu Juan Li

Keywords:

Concrete, C-S-H Gel, Magnesium Sulfate, Mechanism

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References

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