Interfacial Transition Zone Micro-Structure of Light-Burnt MgO Concrete

Xia Chen; Hua Quan Yang; Yong Zhen Zuo; Yan Shi; Kai Tao Xiao

doi:10.4028/www.scientific.net/AMR.415-417.514

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 415-417Interfacial Transition Zone Micro-Structure of...

Interfacial Transition Zone Micro-Structure of Light-Burnt MgO Concrete

Abstract:

The computed tomography was introduced to track the development of cracks in cement matrix and Interfacial Transitional Zone (ITZ) of MgO concrete under load to failure and EDS and BEI was employed to investigate the enrichment characteristics of elements in vicinity of ITZ area. Results indicated that cracks intended to extend along boundary of ITZ area which aggravated ITZ as the weak link of concrete structure. The morphology of products of hydration in ITZ area and cement matrix was similar but differed in amount, size and crystal features. Elements Ca, Si, Al and Mg had tendency to enrich in ITZ zone but differed in accumulation extent in orders. MgO was non-uniformly distributed in concrete, fully mixed in construction though, richer in cement matrix than in ITZ, yet MgO later inclined to migrate to ITZ area and the gap in between was mitigated with in-depth hydration.

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Periodical:

Advanced Materials Research (Volumes 415-417)

Pages:

514-518

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.415-417.514

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Online since:

December 2011

Authors:

Xia Chen, Hua Quan Yang, Yong Zhen Zuo, Yan Shi, Kai Tao Xiao

Keywords:

Concrete, Crack, Failure, Interfacial Transitional Zone, Light-Burnt MgO

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References

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