Experimental Investigation on Plastic Shrinkage Characteristics of Self-compacting Concrete with Mineral Admixtures and Steel Fibers

The aim of this work is to evaluate the effectiveness of mineral admixtures and steel fibers on the plastic shrinkage of Self-compacting concrete (SCC). SCC is a highly flowable concrete without any segregation used in both dynamic and static states. For the production of sustainable SCC, appropriate supplementary cementitious materials (SCMs) are added. An optimum percentage of Fly ash, GGBS, Silica fumes, and steel fibers are incorporated. The workability test and compressive strength test of SCC mixes were done. ASTM C1579-based mould is used for the plastic shrinkage test is also carried out. Plastic shrinkage is the volumetric contraction of fresh contract due to the escape of water from the surface of the concrete. The test results of normal conventional SCC and SCC with optimum SCMs incorporated with steel fibers were compared. CRR (crack reduction ratio) was determined and it was 83, 78 and 73% respectively for MFS30, MGS30, MSS30 compared to that MF30, MG30, MS10 respectively.