B.E. in civil engg
M.E. in Structural Engg
Ph.D. in Civil Engg
RESEARCH, TEACHING, or OTHER INTERESTS
Civil and Structural Engineering, Building and Construction, Waste Management and Disposal, Multidisciplinary
49
Scopus Publications
Scopus Publications
Strength studies on concrete using e-plastic waste as coarse aggregate Subashree Paramasivan, Thenmozhi Rajagopal, L Bandodkar, A Gaonkar, N Gaonkar, et al. Global Nest Journal, 2023 <p>As an important resource for the IT sector and due to the extremely hazardous elements it contains and the low recycling rate, e-plastic waste management and recycling are growing swiftly. E-plastic waste utilization reduces aggregate costs, landfill costs and energy prices. Rapid population growth coexisted with industrialization and a dynamic shift in the volume of garbage produced. These dangerous wastes and other types of waste represent a serious threat to the ecosystem as well as human health. Therefore, the issue of efficient waste management is essential to the preservation of the environment, human health and livelihood. Concrete coarse aggregate made from plastic and recovered e-waste is being tested for feasibility. Testing was done to find out the characteristics of electronic plastic waste when used as coarse aggregate (2%, 4%, 6%, &amp; 8%). These characteristics included specific gravity, water absorption, fineness test, compressive strength, tensile strength and flexural strength of the concrete.</p>
Experimental study on geopolymer concrete with partial replacement of bethamcherla waste stone powder Global Nest Journal, 2023 <p>The process of making portland cement uses up a lot of resources and has a harmful environment effect since it produces a lot of greenhouse emissions. The by-product of the stone cutting and polishing industries is Bethamcharla waste Stone Powder (BWSP). Each industry produces an average of one tonne of waste each year, which is then simply deposited on the plains of Bethamcharla. In order to convince civil engineers to employ this new industrial waste material in Geopolymer Concrete (GPC), this research will examine the effects of substituting BWSP for Ground Granulated Blast-furnace Slag (GGBFS). Experimental investigations were conducted toward issues relating to strength. In the amounts of 20, 40 &amp; 60 % by weight of GGBFS, the BWSP was employed as a substitute. Initial total mixes are prepared during the experimental inquiry with varying molarities of 8, 10, 12, 14, and 16 as well as changes to the mix proportions. According to the trials, the 16 molarity and 1:1.32:3.1 (GGBFS: FA: CA) mix with alkaline solution delivered preferable outcomes, allowing for the fullest possible use of BWSP in the mix. The current study provides information on the behaviour of BWSP in Geopolymer Concrete. As determined by the study, the minimum strength of concrete (M25) cannot be affected while using 60% BWSP with 16 molarity for construction.</p>
PREDICTION OF COMPRESSIVE STRENGTH OF SINTERED FLY ASH AGGREGATE CONCRETE USING ARTIFICIAL NEURAL NETWORKING Revista Romana De Materiale Romanian Journal of Materials, 2022
Behaviour of sintered fly ash aggregates and steel fibers on rein-forced concrete slabs subjected to punching , Ranjith Babu B, Thenmozhi R, and Revista De La Construccion, 2022 In this study the optimum replacement percentage of sintered fly ash aggregates in M30 grade of concrete was identified based on 28 days cubical compressive strength value. The optimum replacement of Sintered Fly ash Aggregates (SFA) is 40 %. Before identifying the optimum replacement percentage, the SFAs were tested for suitability test such as crushing strength test, impact test and water absorption test. Further, the optimum 40 % SFAs in concrete is tested for punching shear on the Reinforced Concrete (RC) slabs for a dimension of 1000 mm x 1000 mm x 100 mm. In addition to know the effect of steel fibers in RC slabs subjected to punching. A hook ended steel fibers having an aspect ratio of 55, 80 and 100 is selected and varied by volume of concrete for the punching shear values on RC slabs. The RC slabs concrete contains aspect ratio of steel fibers 55 is varied for 0.25 %, 0.5 %, 0.75 % and 1 % for volume of concrete. In addition to that a constant volume of steel fiber 0.5 % is selected for the aspect ratios of 80 and 100 for the punching shear tests. The punching shear values for the RC slabs shows that partial replacement of SFAs and steel fibers in concrete enhances the punching shear strength. These experimental tested results are compared with finite element programming (ABAQUS) and international codes such as IS 456 and ACI 2011. The experimental punching shear results were higher when compared to international codes.
Characterization and behavior of basalt fiber-reinforced lightweight concrete Nagarajan Divyah, Rajagopal Thenmozhi, Meyappan Neelamegam, Ramaiah Prakash Structural Concrete, 2021 The improvised construction techniques and utilization of industrial wastes in manufacturing concrete play a major role in sustainability. The artificially manufactured aggregates are gaining importance in the present era. The use of fibers as secondary reinforcement is greatly pronounced. Sintered fly ash aggregate concrete and normal aggregate concrete with and without basalt fiber with 28 days compressive strength of 30 Mpa were cast and tested. The stress–strain curve of the lightweight concrete has a lower modulus of elasticity when compared with the normal aggregate concrete. A simple linear relationship has been developed between the mechanical properties using regression analysis. The water absorption and void ratio had a direct relationship with the sorptivity and ponding of concrete. The strength and durability aspects of the lightweight aggregate concrete had better agreement with the requirements of the structural lightweight concrete. Strict adherence to codal provisions with respect to strength and durability can be made for improvised behavior.
Experimental and numerical studies on punching shear strength of concrete slabs containing sintered fly ash aggregates , Ranjith Babu B., Thenmozhi R, and Revista De La Construccion, 2021 This paper presents experimental and numerical investigations on M30 Grade of concrete containing 40% of sintered fly ash aggregates (SFAs) on the punching behaviour of reinforced concrete (RC) slabs. Two 1000 x 1000 x 100 mm reinforced concrete slabs were cast and subjected to punching tests. The experimental results were compared with creating a nonlinear finite element programme using ABAQUS. This 3D Finite element analyses were performed with the appropriate modelling of element size and the constitutive modelling of concrete. The material parameters of the damaged plasticity model in ABAQUS were calibrated based on the test results of slab – plate connection. The comparison between experimental and numerical results indicates that the calibrated model correctly predicts the punching shear response of the slabs. A modification of 0.4 is introduced in MC2010 code.
An investigation of key mechanical and durability properties of coconut shell concrete with partial replacement of fly ash Ramaiah Prakash, Rajagopal Thenmozhi, Sudharshan N. Raman, Chidambaram Subramanian, Nagarajan Divyah Structural Concrete, 2021 This study investigated the effect of adding fly ash on the mechanical and durability characteristics of coconut shell (CS) concrete. Two different mixes were developed, one with CS and the other with conventional aggregate and CS as coarse aggregate. Cement was replaced with Class F fly ash in terms of weight at 0, 10, 20, and 30% in both mixes. Test result showed that the CS concrete with 10% fly ash replacement level exhibited the highest compressive and tensile strength. The addition of fly ash decreased the porosity of CS concrete due to its fineness and increased hydration products in the matrix at later ages. Additionally, it also improved the weak aggregate interfacial transition zone of CS lightweight concrete. Thus, the fly ash addition in CS concrete showed lower values of water absorption, permeable voids, sorptivity, and chloride permeability. Furthermore, the increasing content of fly ash addition improved the durability characteristics of CS concrete considerably.
Characterization of eco-friendly steel fiber-reinforced concrete containing waste coconut shell as coarse aggregates and fly ash as partial cement replacement Ramaiah Prakash, Rajagopal Thenmozhi, Sudharshan N. Raman, Chidambaram Subramanian Structural Concrete, 2020 This study investigates the effect of steel fiber addition into eco‐concrete made with fly ash, an industrial by product, as partial cement replacement material, and coconut shell, an agricultural waste, as coarse aggregates, on the mechanical properties. Two different mixes were developed, one with coconut shell only as coarse aggregates, and the other with both conventional aggregates and coconut shell as coarse aggregates. The cement content was replaced with class F fly ash at 10% by weight. Steel fibers of 0.25, 0.5, 0.75, and 1.0% by volume of concrete were used. The properties investigated were slump, density, ultrasonic pulse velocity, compressive strength, split tensile strength, flexural strength, and modulus of elasticity (MOE). The findings indicated that the addition of steel fibers resulted in a reduced slump and slightly increased density in the fresh concrete mixes. Meanwhile, enhancements of up to 39% compressive strength and 17% MOE were also obtained. A substantial improvement in split tensile strength and flexural strength were also observed. Steel fiber addition also significantly reduced the brittleness of concrete containing coconut shell. The outcomes of the experiment revealed that steel fiber addition yielded a positive result on the mechanical properties of coconut shell concrete.
Characterisation and utilisation of sugarcane bagasse ash as pozzolanic material and its effect on mechanical strength of concrete Journal of Environmental Protection and Ecology, 2020
Experimental study on self compacting concrete (M25) with 25% fly ash incorporating 10% replacement of coconut-shell as coarse aggregate Nature Environment and Pollution Technology, 2015
Experimental studies of flexural torsional buckling of laterally unbraced cold-formed lipped channel beams Journal of Structural Engineering India, 2015
Treatment of dairy waste water using biodegradable materials in UASB reactor and measuring biogas production Asian Journal of Microbiology Biotechnology and Environmental Sciences, 2015
Experimental behaviour of waste tyre rubber aggregate concrete under impact loading Iranian Journal of Science and Technology Transactions of Civil Engineering, 2014
Ecosystem approach for restoration of polluted tanks Pollution Research, 2014
Behaviour of hybrid ferrocement slabs subjected to impact Journal of Structural Engineering India, 2014
Flexural-torsional buckling tests of cold-formed lipped channel beams under restrained boundary conditions International Journal of Engineering and Technology, 2014
Experimental study on the behaviour of axially loaded double skinned hollow steel tubular columns in-filled with self compacting concrete Pollution Research, 2013
Sustainable concrete using high volume fly ash from thermal power plants Ecology Environment and Conservation, 2013
Prediction of impact energy absorption using modified regression theory Life Science Journal, 2013
Industrial and environmental application of high volume fly ash in concrete production Nature Environment and Pollution Technology, 2013
