Experimental investigation was carried out through selection and testing of materials, determination of concrete mixture proportions, and preparation and testing of various fresh concretes.
Ordinary (ASTM Type I or CSA Type 10) portland cement, crushed granite stone, pit sand, noncrystalline amorphous rice husk ash (RHA), tap water, poly-carboxylic acid-based high-range water reducer (HRWR), and a synthetic air-entraining admixture (AEA) were used to produce various SCC. Crushed granite stone and pit sand were selected as coarse and fine aggregates, respectively, whereas rice husk ash was used as a supplementary cementing material. Prior to use in preparing concrete mixtures, the component materials were tested for a number of physical properties. These properties were useful to judge the suitability of the constituent materials. In addition, most of these properties were directly used in mixture proportioning of different concretes. The physical properties of the concrete materials are given in Table 1.
Table 1: Physical Properties of Constituent Materials