Abstract
High-quality-shotcrete (HQSC) began to be applied on the site of New Bullet Train Projects in fiscal year 1997 about ten years ago. A viscous characteristic when it is fresh, the use realities of the fine aggregate, the strength characteristic, and the strength characteristic of hardened materiales have been examined for HQSC. Authors have examined the water retention characteristic of powders and the fine aggregate from the result of the fine aggregate data and the test mixing on 119 sites. This report describes the result of the examination about the influence of the water retention characteristic on the fresh properties of HQSC.
