The development of new empirical apparatuses for evaluation fresh properties of self-consolidating mortar: Theoretical and experimental study

Self-Consolidating Concrete (SCC) and Self-Consolidating Mortar (SCMO) contain unique properties such as filling ability, passing ability, and segregation resistance, differentiating them from ordinary concretes. Little changes in SCMO and SCC ingredients bring about major changes in their workability and segregation. The behavior of fresh SCMO depends on variable factors such as water to cement ratio, gradation and moisture content of aggregates, type of mineral additives, dosage and type of superplasticizer and other chemical admixtures. In addition, evaluation of fresh properties of the SCMO requires simple and fast methods. In this study, based on the flow velocity and volume to surface ratio method, new apparatuses were developed to evaluate the fresh properties of SCMO. Mini J-ring, mini U-box, and mini L-box were used to measure passing ability parameters. Mini slump, mini Orimet, new mini V-funnel and mini V-funnel were used to measure filling ability and mini column segregation was used to measure segregation of self-consolidating mortars. The relationships between critical areas of mentioned methods are considered. The Experimental set-up method was used to record the fresh properties. In addition, 27 different mortar mixtures were prepared to verify the test methods. Results show that flow velocity and volume to surface ratio were appropriate criteria to design new apparatuses to measure fresh properties of self consolidating mortar. (C) 2018 Elsevier Ltd. All rights reserved.