Influence of Aggregates on Cracking Sensitivity of Concrete

Abstract:

Concrete cracking sensitivity made from different aggregates was compared with employment of advanced temperature and stress test machine by tracking thermal and stress development of concrete with age and elements distribution in interfacial transition zone of each concrete was explored by SEM and EDS. Test results indicated that compressive strength of concrete made from basalt and limestone was greater than diorite and natural aggregate and crack resistance of concrete based on cracking sensitivity comparison in terms of cracking temperature varying from minus 0.3°C to minus 2.5°C as diorite, basalt, limestone and natural aggregate. Elements Ca and Mg were apparently accumulated in vicinity of ITZ and some reaction between limestone and cement matrix might have taken place which blurred the boundary between aggregates and cement matrix.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 3299-3302
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.3299
• Online since: October 2012
• Authors: Xia Chen, Jian Jun Yan, Hua Quan Yang
• Keywords: Aggregate, Concrete, Cracking Temperature, Sensitivity, Strength

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