Faculty Publications
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Item Influence of Superplasticizers on Blended Cement and Their Effect on Flow Characteristics by Incorporating PGBS as Partial Replacement for Fine Aggregates(Springer Science and Business Media Deutschland GmbH, 2021) Arpitha, D.; Sudarshan, V.J.; Thilak Kumar, Y.T.; C, C.Currently the upsurge practice of the mineral admixtures as an alternative for cement to cut down the carbonic gas emission, to reduce the cement cost, and to progress some technical recitals is truly the indispensable novelty advanced in construction industry. Mortars with different w/c require the use of appropriate and compatible chemical admixtures to achieve desirable consistency. The principal tactic delivered to contest in contradiction to this exertion is to choose the furthermost effective twosome cement–superplasticizer, facilitating to attain a determined water reduction, an enhanced flow, and an adequate rheology. Processed Granulated Blast Furnace Slag (PGBS) incorporated as partial replacement for Fine Aggregates (FA) along with different types of Superplasticizers (SP) for different dosages, which were chemically based on Lignosulfonate (LS), Sulphonated Naphtha Formaldehyde (SNF), and Polycarboxylate Ether (PCE), was used to check the behavior of flow characteristics in this work. The fusion of Portland pozzolana cement (PPC) along with partial replacement of fine aggregates has resulted to understand the better flow interaction between the cementitious materials and under different water–cement ratio (w/c). © 2021, Springer Nature Singapore Pte Ltd.Item Study on Compatibility Issues and Flow Behavior of Copper Slag-Based Mortars(Springer Science and Business Media Deutschland GmbH, 2021) Thilak Kumar, Y.T.; Arpitha, D.; Sudarshan, V.J.; C, C.; Puttaswamy, N.With the growing constructions industries, sand availability has become a headache for the builders and engineers. In this paper an attempt has been made to understand the flow characteristics of partially replaced copper slag (10, 20, 30, and 40%) in mortars with varied water binder ratio (0.35, 0.4, and 0.45) for different percentages of superplasticizers dosage (0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, and 2.0). Thus, the test results drawn help to identify the optimum dosage of superplasticizer required for different percentage replacement of fine aggregates and water binder ratio and understand the flow behavior characteristics of mortars. © 2021, Springer Nature Singapore Pte Ltd.Item Study on Processed Granulated Blast Furnace Slag as a Replacement for Fine Aggregates for the Greener Global Construction(Springer Science and Business Media Deutschland GmbH, 2023) Arpitha, D.; C, C.; Kappadi, P.As innovation in concrete technology advances and the environment weakens, it is currently evident that the boundless utilization of construction materials and its initial expense being the common determination model has become a routine with regard to the past. Since there is great interest for raw materials and natural resources are rare, it is expected to utilize a high volume of alternative materials in concrete that would be monetarily beneficial like crushed sand, blast furnace slag, etc. An experimental investigation was carried out to examine the behaviour of mortars incorporating partial volumes of secondary material to fine aggregates. Processed granulated blast furnace slag (PGBS), newly processed slag which had overcome the limitations of granulated blast furnace slag obtained as a by-product during the extraction of steel was tested for fine aggregate (FA) replacement. Several combinations of mortar mixes were prepared using Lignosulfonate (LS), Sulphonated Naphthalene Formaldehyde (SNF) and Polycarboxylate Ether (PCE)-based superplasticizers (SP) for 0 and 50% replacement levels of FA by PGBS to recognize the feasible optimum dosage of SP required to achieve desired flow characteristics of mortars. Based on the optimum dosage of SP and w/c obtained, mortar cubes were prepared and cured for 3, 7, and 28 days. These cubes were tested for compressive strength periodically, the results revealed that PCE-based SP exhibited better performance concerning flow behaviour and strength gain parameters along with the effective reduction in w/c for both 0 and 50% FA replaced mixes. PGBS exhibited higher strength when compared to 0% replaced mixes though there was a slight increase in water content required for the cohesive mix. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.Item Suitability study of processed granulated blast furnace slag (PGBS) as fine aggregate replacement in mortar exposed to the marine environment(Elsevier Ltd, 2023) Salihi, A.; Arpitha, D.; C, C.With the increasing demand for infrastructures and other buildings in all over the world the demand for natural sand as fine aggregates is growing. Various parts of the world are facing an acute shortage of natural aggregate. Despite that, every year, millions of tons of industrial waste are being produced and dumped, which is a good alternative for natural aggregate. This paper is mainly about the partial replacement of advanced and processed form of GBS (generated in steel plants) call as PGBS (Processed Granulated Blast Furnace Slag) which has similar properties as natural sand, as fine aggregate (FA) and to find out the effects on mortar mixes exposed to the marine environment. Mortar cubes and prisms were prepared with the following percentages of PGBS (10%, 30%, 50%) compared to normal mixes (0%). The specimens were exposed to the marine environment and normal water conditions. Harden properties like compressive strength and drying shrinkage of mortar were observed for 7, 14, 28 and 90 days. The study mainly focused on drying shrinkage, which is a significant issue in today's concrete industries. The study finds out that drying shrinkage and compressive strength properties of mortar improved by an increase in the percentage of PGBS and recommends suitable use of PGBS in mortar mixes. © 2023 Elsevier Ltd. All rights reserved.