RANJITHA B TANGADAGI

@gitam.edu

Assistant Professor - Civil Engineering Department
GITAM Deemed to be University



           

https://researchid.co/ranjitha.tangadagi
21

Scopus Publications

Scopus Publications

  • Potential Use of Recycled Foundry Sand as Fine Aggregate in Self-Compacting Concrete: Sustainable Engineering Research
    Ranjitha B. Tangadagi and Panruti T. Ravichandran
    MDPI AG
    This research aims to identify an eco-friendly and low-mass substitute for fine aggregate (FA) in self-compacting concrete (SCC). The study specifically examines the potential of waste foundry sand (WFS) as an FA replacement. The primary objective is to explore the impact of processed WFS in SCC, addressing both the WFS disposal issues and enhancing the environmental performance of SCC. After collecting the WFS, it was sieved, segregated, washed thoroughly with water, and then oven dried to remove all clay, carbon, and hazardous content. Treated foundry sand (TFS) is utilized as a substitute for FA in SCC. This study examines the effects of TFS on SCC’s strength, flowability, durability, and microstructural characteristics. Various proportions of TFS are investigated, including replacing 0, 10, 20, 30, 40, and 50% of FA by weight with TFS in the concrete mixture. This research demonstrates that TFS can effectively replace FA in improving the flowability and passing ability of SCC. Furthermore, the findings on SCC’s strength and durability after incorporating TFS suggest that using 30–40% TFS is optimal, as it does not negatively impact the structural performance of SCC. Alternatively, the use of TFS in SCC results in a dense microstructure, improved gel formation, and better bonding of the constituents of ingredients used in SCC. Overall, the results of this study reveal that the use of TFS in SCC can help reduce the amount of waste and improve its sustainability. This also shows that the process can reduce the density of the mix.

  • Experimental Investigation on Stabilization of Soil Using Steel Slag: A Step Towards Sustainability
    Ranjitha B. Tangadagi, P. T. Ravichandran, and L. R. Manjunath
    AIP Publishing

  • Performance evaluation of hybrid fiber reinforced concrete on engineering properties and life cycle assessment: A sustainable approach
    Manish S. Dharek, Manjunatha M, Brijbhushan S, Jagadish Vengala, and Ranjitha B. Tangadagi
    Elsevier BV

  • A Comprehensive Review on the Use of Wastewater in the Manufacturing of Concrete: Fostering Sustainability through Recycling
    Manjunath Maddikeari, Bibhuti Bhusan Das, Ranjitha B. Tangadagi, Suman Roy, Priyanka Bangalore Nagaraj, and Manjunatha Lokanahally Ramachandra
    MDPI AG
    The primary aim of this review article is to find the influence of wastewater and its characteristics on recycling as an alternative to potable water for concrete preparation. On the other hand, scarcity, and the demand for freshwater for drinking are also increasing day by day around the globe. About a billion tons of freshwater is consumed daily for concrete preparation for various operations such as mixing and curing, to name a few. The rapid development of certain industries such as textile, casting, stone cutting, and concrete production has caused the water supply to be severely affected. Recycling wastewater in concrete offers various potential benefits like resource conservation, environmental protection, cost savings, and enhanced sustainability. This article reviews the effect of various types of wastewater on various physical and chemical properties of wastewater, rheological characteristics, strength, durability, and microstructure properties of concrete. It also explores the potential effects of decomposing agents on enhancing concrete properties. Currently, limited research is available on the use of various types of wastewater in concrete. Hence, there is a need to develop various methods and procedures to ensure that the utilization of wastewater and treated wastewater is carried out in the production of concrete in a sustainable manner. Although wastewater can reduce the workability of fresh concrete, it can also increase its strength and long-term performance of concrete. The use of various types of wastewater, such as reclaimed water and tertiary-treated wastewater, was found to be superior compared to those using industrial- or secondary-treated wastewater. Researchers around the globe agree that wastewater can cause various detrimental effects on the mechanical and physical properties of concrete, but the reductions were not significant. To overcome limited scientific contributions, this article reviews all the available methods of using various types of wastewater to make concrete economically and environmentally friendly. This research also addresses possible challenges with respect to the demand for freshwater and the water crisis.

  • Performance Evaluation of Self-Compacting Concrete Prepared Using Waste Foundry Sand on Engineering Properties and Life Cycle Assessment
    Ranjitha B. Tangadagi and P. T. Ravichandran
    MDPI AG
    The primary objective of this research is to utilize an industrial waste byproduct such as waste foundry sand (WFS) as an alternative for fine aggregate in self-compacting concrete (SCC). This research focuses on the use of WFS in SCC to enhance durability and mechanical properties, to find an alternative for fine aggregate in SCC, to reduce the disposal challenges of WFS, and to make SCC lightweight and environmentally friendly. Initially, WFS was treated with chemical (H2SO4), segregating, and sieving to remove the foreign matter and clay content. For this study, WFS is considered in varying percentages such as 0, 10, 20, 30, 40, and 50. For this investigation, M60 grade SCC is considered as per Indian standards and EFNARC guidelines. After that, this research focuses on tests on various fresh properties of SCC in each batch to find the flowability and passing ability of various mixes prepared using WFS. Similarly, the mechanical properties of SCC such as compressive, flexural, and split tensile strength tests were performed at 7, 28, and 90 days curing periods, respectively. Likewise, durability properties of SCC were found in all the mixes prepared using WFS such as water absorption, sorptivity, resistance to chemical attack, and chloride ion penetration; tests of these properties were performed at 28 and 90 days curing periods, respectively. Based on the experimental investigation of SCC, it was found that WFS can be used in M60 grade SCC as an alternative for fine aggregate up to 30% without compromising much on its properties. Finally, this establishes that using treated WFS in SCC helps in reducing the generation of waste and prevails as a meaningful utilization method. This research will also establish that the use of treated WFS will reduce the density and make SCC a lightweight, green, and sustainable material.


  • Utilization of industrial-based PVC waste powder in self-compacting concrete: A sustainable building material
    M Manjunatha, Dinesh Seth, Balaji KVGD, Suman Roy, and Ranjitha B Tangadagi
    Elsevier BV

  • Evaluation of Land Use/Land Cover Changes due to Urban Sprawl in Bengaluru Rural, Karnataka, India
    A. Bharath, M. Manjunatha, T. V. Reshma, Ranjitha B. Tangadagi, and Sifatullah Bahij
    Hindawi Limited
    The availability of productive land is significantly impacted by the global phenomenon of urbanization. The amount of land available for food production and other essential activities decreases as cities grow because the urban perimeter encroaches on rural and natural areas. Conducting research on urban sprawl analysis and land use land cover (LULC) change assessment is essential in ensuring sustainable urban growth. Bengaluru, a rapidly expanding metropolitan city, has a significant impact on the area around it, making it a prime location for this kind of study. In this study, authors sought to assess how urban sprawl affected LULC in the Bengaluru rural district that surrounds the city of Bengaluru. The study evaluated changes in LULC over a two-decade period using remote sensing data and GIS tools. Five LULC classes were used to categorize the study area: settlement, waterbody, vegetation, agriculture, and barren land. The maximum likelihood technique was used to classify Landsat images from three different time periods using the supervised image classification method in the ERDAS software. Accuracy assessment was used to gauge the classified images’ accuracy. The study’s important findings showed how the LULC classes in the study area have been negatively impacted by the urban sprawl. The study emphasizes the significance of ongoing research in LULC change assessment and urban sprawl analysis to ensure sustainable urban growth and safeguard the availability of productive land.


  • Assessment of LULC Changes for Hesaraghatta Watershed Using GIS Tools and Remote Sensed Data
    Bharath A., Manjunatha M., Ranjitha B. Tangadagi, Preethi S., and Mukund Dangeti
    Technoscience Publications
    Hesaraghatta watershed is one of the most vital and environmentally substantial watersheds in the Arkavathi basin. It has a freshwater lake created in the year 1894 across the Arkavathi River to quench the drinking water requirements of Bengaluru city. The watershed is facing significant stresses due to rapid urbanization and other developmental activities. For this study, an attempt is made to assess the distribution of various land use land cover classes and their temporal changes over 18 years using remote sensed data and GIS tools. The watershed is categorized into four land use land cover classifications: settlement, waterbody, vegetation, and bare soil. The maximum likelihood technique is utilized for the image classification and accuracy assessment is carried out to evaluate the accuracy of image classification. The outcome of the study revealed that there is a substantial change in land use land cover classes in the Hesaraghatta watershed.

  • Drainage morphometry based sub-watershed prioritization of Kalinadi basin using geospatial technology
    A Bharath, K Kiran Kumar, Ramesh Maddamsetty, M Manjunatha, Ranjitha B Tangadagi, and S Preethi
    Elsevier BV
    ABSTRACT Watershed management is an essential part to achieve sustainability. In the case of large watersheds, management and conservation practices cannot be implemented efficiently over the entire area due to inadequate human resources and financial support. Therefore, prioritizing the sub-watersheds and implementation of management practices would be a viable technique to ensure sustainability within the watershed. In this study, sub-watershed prioritization is carried out for the Kalinadi basin based on erosion susceptibility using morphometric analysis. SRTM DEM is used to extract stream network and delineate the sub-watersheds using ArcGIS software. Further, the Kalinadi basin is divided into eight sub-watersheds and morphometric analysis performed. In the current study, for prioritizing the sub-watersheds, nineteen morphometric parameters are considered which include linear, aerial and relief aspects. The results of linear, aerial and relief parameters of every sub-watershed are given with ranks based on their influence on soil erosion and then subjected to compound parameter analysis which is used to prioritize each sub-watershed. The morphometry-based prioritization findings demonstrate that Sub watershed-8 (SW-8), SW-4 and SW-5 face high risk, SW-6, SW-7 and SW-2 face medium risk whereas SW-3 and SW-1 face a low risk of soil erosion. The results can be used by the decision-making authorities to plan and implement the watershed management practices optimally to control soil erosion.

  • Influence of ZnO and TiO<inf>2</inf> on mechanical and durability properties of concrete prepared with and without polypropylene fibers
    T V Reshma, M Manjunatha, A Bharath, Ranjitha B Tangadagi, Jagadish Vengala, and LR Manjunatha
    Elsevier BV


  • Strength characteristics of concrete using coconut shell as a coarse aggregate - A sustainable approach
    Ranjitha B Tangadagi, M. Manjunatha, S. Preethi, A. Bharath, and T.V. Reshma
    Elsevier BV

  • The sustainable use of waste copper slag in concrete: An experimental research
    M. Manjunatha, T.V. Reshma, K.V.G.D. Balaji, A. Bharath, and Ranjitha B. Tangadagi
    Elsevier BV
    Abstract Industrialization is blossoming gradually and has uplifted the living standard of human beings. Now it became hazardous to environment, because of disposal challenges due to waste by-products. Manufacturing of copper-based products consumes natural resources, energy, it emits various greenhouse gasses to the environment and causes natural depletion. Whereas, construction industry consumes natural resources like, river sand, aggregate, wood, lime and clay to manufacture cement to name a few on a wide scale to build infrastructure. In this research, to reduce the resource consumption, to overcome the environmental challenges due to waste by-products, authors used waste copper slag. Authors attempted use of waste copper slag (WCS) as a substitute for river sand in M40 grade concrete. Similarly, poly propylene fibres (PPF) are used to study the effect of fibres on concrete prepared with WCS. This research concentrates on mechanical and fresh properties of concrete prepared with and without PPF on use of WCS as a partial replacement of river sand. Experimental findings indicate that, use of WCS improves the fresh properties of concrete linearly. Also, mechanical properties of concrete prepared with up to 60% WCS by weight of sand enhances strengths of concrete in marginal rate. Use of WCS as a substitute for river sand, helps in reducing the cost of concrete preparation and consumption of natural resources. This research helps researchers and practitioners in making concrete sustainable and eco-friendly by using WCS.

  • Strength and drying shrinkage of high strength self-consolidating concrete
    V. A. Shruthi, Ranjitha B. Tangadagi, K. G. Shwetha, R. Nagendra, C. Ranganath, Bharathi Ganesh, and C. L. Mahesh Kumar
    Springer Singapore

  • Creep characteristics of high strength self compacting concrete
    Ranjitha B. Tangadagi, V. A. Shruthi, Bharathi Ganesh, M. V. Vasudev, R. Nagendra, and C. Ranganath
    Springer Singapore

  • Prediction of temperature data for Ghataprabha sub-basin using change factor method


  • Sustainable effect of chemically treated aggregates on bond strength of bitumen


  • Utilization of steel slag as an eco-friendly material in concrete for construction


  • Environmental assessment for rainwater harvesting at gitam campus