New generation fine aggregate for using in high performance concrete

The paper presents an experimental procedure for using of washed crushed stone sand in the mix design of high-performance concrete for precast tunnel segments and underground tremie concrete for diaphragm wall structures. The mix designs for artificial washed crushed sand and river sand were developed for achieving desired workability of concrete for smooth casting of the structure. the proportions of coarse aggregate and fine aggregate of both the concrete mix designs were optimized to achieve the rheology of concrete. The more variation observed in the results of fresh and hardened properties of both the mixes. It has been observed that concrete mix design made by artificial crushed stone sand gives better results of fresh concrete, hardened concrete and achieved better results of durability parameters as compared to concrete mix designs with river sand. The comparison of material properties, workability, cube compressive strengths, RCPT, permeability and NT Build tests values are presented in this article.