The Development of Semi-Selfcompacting Concrete as a Filling Material for Composite Structures
By T. Yamato, T. Azuma, K. Watanabe and S. Shiraishi

Concrete Jounal, Vo.41, No.7, Jul. 2003


Synopsis
We developed economic concrete to fill up in steel-concrete composite structures of immersed tunnel elements. This concrete can be provided the required compactability with few supplementary vibrations, and is less costly and gives easier production control, construction control and quality control than self-compacting concrete. We define the concrete as "Semi-selfcompacting Concrete as a Filling Material", and describe as semi-selfcompacting concrete below. Because performance and compactability of the semi-selfcompacting concrete with a slump flow of approximately 500 mm executed various experiments, We confirmed that it was superior concrete in utility.
Keywords:
semi-selfcompacting concrete as a filling material, composite structure, immersed tunnel

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