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Concrete Design of concrete filled steel tube should not only meet the requirements of self-compacting, but also need suitable expansion properties. On the basis of working performance requirement, study impact of expansive agent on concrete working performance, strength and expansion properties, preparation of C60 concrete filled steel to meet the self-compacting and expansion properties. Expander should not be too much, otherwise working performance and strength will be affected. Meanwhile study the correlation between restrained expansion and free expansion of expansive concrete, and analyze the mechanism of expansive concrete

Preparation and Expansion Properties Analysis of C60 Expansive Self-compacting Concrete