Rapid chloride permeability test (RCPT) was conducted to check the concrete resistance against chloride ions penetration. Durability tests were conducted and comparison of the % of loss in mass and % of loss in strength for concrete samples subjected to acid attack, sulphate attack, alkaline attack tests were also carried out. Non-Destructive tests such as Ultra Sonic Pulse Velocity (UPV) and rebound hammer tests were conducted to assess the quality of these mixes. Compressive and split-tensile strength studies were conducted on cubes (150mmx150mmx150mm) and cylinders (150mmx300mm) at 7, 14 & 28 days of curing. Trials on partial replacing cement with fly ash content of 33% and GGBS of 40% has also been carried out. This research gives the experimental results on strength and durability studies of concrete carried out on samples obtained from RMC Plant by making use of manufactured sand containing (50% of crushed sand and 50% of the crushed rock fines) as replacement for natural sand. The strength and durability concerns about using 100% manufactured sand along with mineral admixtures in RMC plant needs to be addressed through suitable experimental demonstrations. Ready mix concrete (RMC) is playing vital role in fast-track construction particularly in Tire-II cities in India. To meet the intensifying demand of fine aggregate in construction sector, manufactured sand has become a viable alternative to the river sand. However, in this study, the authors considered the formation and development of cracks, the load began to be cracked, the load began to be damaged and the order of the cracks appearing in single-layer and multi-layer steel fiber concrete beams both in testing method and ANSYS numeri-cal simulation method, in which, considering the nonlinearity of materials with a size of 0.15×0.2×2.2m single layer beam and a size of 0.15×0.3×2.2m double layers beam, in the case of steel fiber concrete layer is below the normal concrete layer. Multi-layer beam structure has been studied in various forms of static and dynamic problems. With normal concrete beams that need to be repaired due to damage during use, the steel fiber concrete layer is poured over or be-low the normal concrete layer, forming laminated beam structure. however, single-layer and multi-layer concrete beams, there are additional parameters that affect the formation and development of cracks with the participation of steel fibers in concrete and changes in content of steel fibers in concrete. In the study of cracking of concrete beams, cracks are formed and devel-oped depending on many different parameters: size of beam cross section, reinforced concrete material, effective load, calculation method, testing methods, etc.
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