ABSTRACT
ABSTRACT: The paper presents results furnished by a national research program developed at the Technical University of Cluj-Napoca in cooperation with specialists from INCERC Cluj-Napoca Branch, in order to implement self-compacting concrete in the Romanian precast concrete industry. Mixes for C50/60, C40/50 and C30/37 strength classes with cement CEM I 52.5R, cement and silica fume or cement and limestone filler have been designed and tested, and properties in fresh and hardened state have been evaluated. Mix constituents (sand, gravel) are materials currently in use in a local precast concrete plant and admixtures (HRWR) and additions (silica fume) are provided by Sika Romania Ltd. Mixture proportions and parameters such as cement type, cement content, w/c ratio and concrete strength class are discussed with respect to the limit values specified in Romanian Standard SR EN 206-1: 2006, for durability reasons.
