Published Paper Details:

This investigation explores the utilization of Ultra-fine in the production of high- performance Concrete (HPC) with gives early age strength for concrete. The study examines the early development of compres ive strength after casting, alongside as es ing variations in workability and the retention thereof in mix preparation. Moreover, it investigates the compres ive strain behaviour, flexural parameters, resistance to acid at ack, early age shrinkage, and select durability properties of the resultant optimal concrete mixes. Microstructural modifications are evaluated using Scan ing Electron Microscopy (SEM) tests. The incorporation of Ultrafine led to a reduction in fresh properties beyond certain ad ition percentages. Notably, substituting part of Cement with Ultrafine in HPC mixes demonstrated significant enhancements in mechanical and durability aspects. The ad ition of Ultrafine, when combined with fly ash at optimal quantities, notably improved the early age strength of concrete while moderately enhancing other mechanical properties. However, it was observed that the use of selected mineral admixtures under a multiple blend system increased early age shrinkage-induced stres levels and concrete brit lenes . Nonetheles , an improvement in microstructure was observed, characterized by a denser hydrated matrix of ering enhanced homogeneity and improved bonding with ag regates. Furthermore, an increase in strength-governing hydration phases was evidenced with the optimal ad ition of ultrafine. The combination of Ultrafine and Fly ash significantly enhanced durability behaviour, at ributed to microstructural refinement through pore refinement.