Study on the Mechanism of Magnesium Sulfate to Cement and C-S-H Gel
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 SO42- 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.
Chaohe Chen, Yong Huang and Guangfan Li
X. J. Li "Study on the Mechanism of Magnesium Sulfate to Cement and C-S-H Gel", Advanced Materials Research, Vols. 243-249, pp. 4687-4690, 2011