Influence on Strength and Durability Analysis of Concrete Incorporating Ultra Fine Slag
T. Jaya Krishna1, S. Venkatesh2, K. Murali3

1Mr.T.Jaya Krishna, M. Tech., Assistant Professor, Marri Laxman Reddy Institute of Technology and Management, Hyderabad (Telangana), India.
2Mr. S. Venkatesh, M.Tech. Student, Marri Laxman Reddy Institute of Technology and Management, Hyderabad (Telangana), India.
3Mr. K. Murali, M.Tech. Student, (Ph.D) Assistant Professor, Marri Laxman Reddy Institute of Technology and Management, Hyderabad (Telangana), India.

Manuscript received on 18 June 2019 | Revised Manuscript received on 25 June 2019 | Manuscript published on 30 June 2019 | PP: 453-456 | Volume-8 Issue-5, June 2019 | Retrieval Number: E6963068519/19©BEIESP
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Abstract: There have been enormous researches going on the use and utilization of industrial, agricultural and thermoelectric plant residues in the production of concrete. Production of high-performance concrete (HPC) plays an important role with different pozzolanic materials like fly ash, condensed silica fume, blast furnace slag, rise husk ash etc. There has been increase in the consumption of mineral admixture by cement and concrete industries. This rate is expected to increase day by day. The presence of mineral admixture in concrete is known to impart significant improvement in workability and durability in concrete. The present study involves the use of mineral admixture „ultrafine slag” as a cementitous material for cement and to evaluate the threshold limit of replacement of cement. Main aim of this work is to evaluate the flexural strength of High strength concrete by partial replacement of cement (0, 8, 10, 12, and 14%) with ultra-fine slag (Alccofine 1203) for M60 grade of concrete. OPC of 43grade from single source is used in this investigation. The addition of alccofine shows an early strength gaining properties with increase flexural strength of concrete. In the last millennium concrete had demanding requirements both in technical performance wise and economy wise and yet greatly varied in application from architectural masterpieces to the simplest of utilities. This study presents the results of an experimental investigation carried out to evaluate the flexural strength of concrete incorporated with ultrafine slag (alccofine) by studying the effects of different proportions of ultrafine slag in the mix and to find optimum dose of alccofine content in the mix. The concrete specimens were cured on normal moist curing under elevated atmospheric temperature for better heat of hydration. Main aim was confined to find the change of flexural strength of reinforced concrete beams. The flexural strength was determined at 7 ,14 and 28 days and comparisons were made for both plain concrete and reinforced cement concrete (R.C.C). Further experimental investigations were carried out to find the effect of steel fibers embedded in concrete along with ultra fine slag. Different durability analysis of concrete incorporating ultrafine slag was also carried out. The addition of alccofine shows an early strength gaining property. The combination of ordinary Portland cement (OPC) with alccofine was found to increase the compressive strength of concrete on all ages when compared to concrete made with ordinary Portland cement alone and has showed excellent durability characteristic with hydrochloric acid. Alccofine matches the dimensional realms of silica fume as it is finer than GGBS. Silica fume is hard to get hold of as it is imported from outside of India. Based upon the results of this research alccofine – 1203 can be proposed as the substitute for silica fume in partial replacement of concrete. Manufacturing of high-performance concrete (HPC), which is majorly used as building material in the major and huge infrastructure projects, is a daunting task.Though the recent advancements have conquered the hurdles of the preparation of high-performance concrete, the use of green materials such as Fly Ash and Rice Husk Ash is limited. Apart from the green materials, many conventional and mineral admixtures or micro materials are available in the market, which enhances the quality and performance of concrete such as Metakaoline, Alccofine and Silica Fume etc. The quality of concrete mix is assessed through various mechanical properties like compressive strength, flexural strength and split tensile strength and various durability tests like rapid chloride penetration test (RCPT), sorptivity test, chloride resistance test, accelerated corrosion test and sea water attack test are carried out to analyse the performance of HPC. The objective of this study is to evaluate the structural strength of high-performance concrete by utilizing green and pozzolanic material as supplementary cementitious material.
Keywords: High Performance Concrete, Alccofine, Steel Fibers, Flexural Strength

Scope of the Article: Concrete Engineering