Verified email at srecwarangal.ac.in
Professor and Head-Department of Civil Engineering
SR University, Telangana, India
Dr.R.Gobinath is presently serving as Professor and Head of the Department, Civil Engineering of SR University, Telangana, India and also a member of Center for Construction Materials and Methods division. He completed his PhD in the field of Environmental Geotechnology and Disaster Management from Center for Disaster Management and Mitigation, VIT, Vellore, M.E in Environmental Management from College of Engineering, Guindy, Anna University and BE in Civil engineering from Bharathiar University. He had handled several under graduate course in Civil and Environmental engineering including Project management, smart materials and structures, Geosynthetics, Engineering Mechanics etc and also presently handling elective courses related to Disaster Management and Intellectual Property rights in various Universities.
His research interests includes Sustainable materials, Construction Materials, Landslide mitigation and Management, Soil Bioengineering, Engineering Education, Geotechnology, Environmental Geotechnology, Sustainable Development, Sustainable construction technologies, he had handled several projects related to this domains in various levels. He also had executed good number of consultancy projects related to Geotechnical and environmental engineering for various organisations.
B.E- Civil Engineering (2001), Bharathiar University
M.E- Environmental Management (2007), College of Engineering, Guindy, Anna University
PhD ( Environmental Geotechnology), VIT University, Vellore, India
Sustainable materials, Construction Materials, Landslide mitigation and Management, Soil Bioengineering, Engineering Education, Geotechnology, Environmental Geotechnology, Sustainable Development, Sustainable construction technologies
This project work involves obtaining sustainable construction materials without depleting the natural resources and by using non convetional material development techniques. It involves lot of analysis, simulation based works and the work is initiated under the aegies of Center for Construction Methdos and Materials of SR University
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P. Murthi, K. Poongodi, P. O. Awoyera, R. Gobinath, and R. Saravanan
Silicon, ISSN: 1876990X, eISSN: 18769918, Pages: 1949-1956, Published: 1 August 2020 Springer Science and Business Media LLC
This study determined the strength properties of high-performance concrete (HPC) produced using ternary blended cement, based on Nano-silica (NS) and bagasse ash (BA) addition to Portland cement. Several mix proportions, based on random mix design, were considered based on the substitution of constituent materials. Fine aggregate was comprised of 60% river sand and 40% recycled aggregate (RA), coarse aggregate used was crushed rock for the development of M50, M60 and M70 grades of concrete. The replacement of cement by BA causes slowdown initial strength development, but increased the setting time of concrete. In order to improve the performance of HPC at early stage, NS was considered as third admixture for developing ternary binder blend in the concrete. The effect of NS and BA on fresh and hardened HPC were investigated and presented. The results indicated that the incorporation of NS reduced setting time and increased the early age strength development significantly. Thus, it was concluded that the addition of NS with mean particle size of 12 nm is suitable as an additional binder for improving the early age performance of HPC.
P. O. Awoyera, I. I. Akinwumi, V. Karthika, R. Gobinath, R. Gunasekaran, N. Lokesh, M. Manikandan, and T. Narmatha
Silicon, ISSN: 1876990X, eISSN: 18769918, Pages: 1779-1785, Published: 1 August 2020 Springer Science and Business Media LLC
By the recent global research developments, a lot of natural and artificial materials that are normally discarded and landfilled, are continually investigated for potential construction applications. In this study, the mechanical and durability properties of lightweight self-compacting concrete produced using pumice, ground granulated blast furnace slag (GGBS), rice husk ash (RHA) and precipitated silica, was investigated. A detailed experimental design was performed, which entailed reducing the water powder ratio, and use of viscosity modifying admixture, for enhancing the fresh SCC quality. The experimental process involved assessment of mechanical and durability properties of concrete mixtures. The results have shown that compressive and flexural strength of SCC made with lightweight aggregate are improved using mineral blended cement. Also, same mix, but with pumice as coarse aggregate gave higher split-tensile strength than other mixtures. This study deduced that pozzolanic reactivity and filler action of supplementary cementitious materials used, enhanced the resistance of the mixtures to deterioration when exposed to aggressive environment.
R Archana Reddy, A Sivakrishna, R Gobinath, and D Ramesh Babu
IOP Conference Series: Materials Science and Engineering, ISSN: 17578981, eISSN: 1757899X, Volume: 872, Published: 26 June 2020 IOP Publishing
P Murthi, K Poongodi, R Gobinath, and R Saravanan
IOP Conference Series: Materials Science and Engineering, ISSN: 17578981, eISSN: 1757899X, Volume: 872, Published: 26 June 2020 IOP Publishing
M. Muthuraman, R. Anuradha, P.O. Awoyera, and R. Gobinath
Engineering Structures, ISSN: 01410296, eISSN: 18737323, Volume: 207, Published: 15 March 2020 Elsevier BV
Abstract The demand for lightweight materials in construction has become very popular due to its flexibility and economical importance. Cold-formed steel beams and columns are used for provision of lightweight, durable and cost-efficient structures, and its usage also helps to optimize the construction time. Cold-formed steel section exhibits post-buckling strength, in which hot rolled section is deficient. However, more theoretical background on design and behavior of cold form section is still required, especially when it is subjected to axial loading. Thus, this paper presents numerical and theoretical behavior of pin -jointed cold-formed steel (CFS) column section (built-up battened Lip channel) under axial loading. The numerical modeling was done by using ABAQUS 6.10 software. Based on American Iron and Steel Institute (AISI) specifications, two types of sections were selected for single lipped channel, and it was ensured that the selected chord spacing permits both moment of inertia about the major axis and minor axis are equal. The numerical and theoretical study were done using a varying batten number and section slenderness ratio. The ultimate loads were obtained under the two approaches, for the lipped channel built-up columns, and were compared for the effective section proposed. From the results, the prediction of buckling mode and the failure load of the column were found to be stable and approximately relevant to the FEM results from slenderness ratio ranging from 20 to 60. Also, flexural buckling of all column sections occurred about the axis parallel to the webs, where there is an opportunity for composite action.
International Journal of Scientific and Technology Research, eISSN: 22778616, Pages: 3666-3674, Published: February 2020
K. Thangapandi, R. Anuradha, N. Archana, P. Muthuraman, O. Awoyera Paul, and R. Gobinath
KSCE Journal of Civil Engineering, ISSN: 12267988, eISSN: 19763808, Pages: 596-602, Published: 1 February 2020 Springer Science and Business Media LLC
Various challenges encountered in the construction industry has led to the production of concrete, with not just high strength, but also with enhanced durability properties. Several research works have been carried out using replacement of constituent materials and introduction of various admixtures in concrete. Alccofine is one of such promising micro fine material. This study investigates the performance of hardened concrete using nano materials. Effects of alccofine (AL) and zinc oxide (ZnO) on the durability and strength of hardened concrete were explored. Series of tests were conducted by substituting cement by weight with 10% AL and adding ZnO in proportions, 0.25%, 0.5%, 0.75% and 1%. Based on the results obtained, the strength properties of concrete reduced as cement replacement level rose beyond 10%. The durability performance of the concrete, in terms of rapid chloride permeability, water permeability test, sea water attack and chloride resistance, was within acceptable limist, even as the ZnO was increased. This study has generally proposed a sustainable solution to produce durable concrete that could have useful aaplication in the construction industry.
Ravindran Gobinath, Isaac Ibukun Akinwumi, Olaniyi Diran Afolayan, Saravana Karthikeyan, Murugasamu Manojkumar, Sivaraj Gowtham, and Ayyasamy Manikandan
Silicon, ISSN: 1876990X, eISSN: 18769918, Pages: 357-363, Published: 1 February 2020 Springer Science and Business Media LLC
Many unsuitable soils for construction purposes can be made suitable by using unconventional soil stabilizers. This study investigates the effects of banana fibre-reinforcement of a soil stabilized with sodium silicate on the geotechnical properties of the composite. It involved the application of 1% sodium silicate with varying proportion (0.1, 0.2, 0.3, 0.4 and 0.5%) of banana fibre to a gravelly sand. Index properties, unconfined compression, direct shear, split-tensile and California bearing ratio (CBR) tests were determined for the stabilized soil and the reinforced soil samples. The results show that the plasticity index, unconfined compressive strength (UCS), shear strength, split-tensile strength and CBR of the specimens stabilized with sodium silicate increased with increasing percentage of banana fibre content. The application of 0.5% banana fibre strengthened the soil - the UCS increased by 445%, shear strength by 80%, split tensile strength by 194% and the soaked CBR increased by 1083%. The banana fibre-reinforcement of the sodium silicate stabilized sandy soils made the stabilized soil become suitable for road pavement application as sub-base material.
Paul O. Awoyera, Oyinkansola Awobayikun, Ravindran Gobinath, and Emmanuel I. Ugwu
International Journal of Engineering Research in Africa, ISSN: 16633571, eISSN: 16634144, Pages: 78-91, Published: 2020 Trans Tech Publications, Ltd.
Various national and international standards recommend potable water for mixing concrete; however, the availability of potable water is virtually a daunting task in some developing communities. Concrete workers in such environments tend to utilize any available water for mixing concrete, and this may be detrimental to the quality of the concrete being produced. This study investigates the rheological, mineralogical and strength variability of concrete due to construction water impurities. Water samples were collected from four different construction sites within Southwestern region of Nigeria for production of concrete. The physical and chemical properties of the waters were determined so as to measure their rate of contamination, prior to their use for mixing concrete. The rheological properties of the fresh concrete, compressive strength, split tensile strength, and microscale features of hardened concrete, that were produced with each water sample were determined. From the results, the rheological features of concrete were found not to be affected by water impurities, however, the mechanical test results revealed about 10% reduction in strength between concrete made with water having least and higher concentration of impurities. Also, it was evident from the microscale tests that the water impurities do alter the hydration rate of concrete, which results in strength reduction. The study suggests pretreatment of concrete mixing water before use in order to avoid its damaging effect on concrete life.
G. Sangeetha, B. Arun kumar, A. Srinivas, A. Siva Krishna, R. Gobinath, and P. O. Awoyera
Advances in Intelligent Systems and Computing, ISSN: 21945357, eISSN: 21945365, Volume: 1048, Pages: 849-862, Published: 2020 Springer Singapore
P. O. Awoyera, J. O. Akinmusuru, A. Shiva Krishna, R. Gobinath, B. Arunkumar, and G. Sangeetha
Advances in Intelligent Systems and Computing, ISSN: 21945357, eISSN: 21945365, Volume: 1048, Pages: 197-207, Published: 2020 Springer Singapore
B. Arun Kumar, G. Sangeetha, A. Srinivas, P. O. Awoyera, R. Gobinath, and V. Venkata Ramana
Advances in Intelligent Systems and Computing, ISSN: 21945357, eISSN: 21945365, Volume: 1057, Pages: 677-690, Published: 2020 Springer Singapore
K Thangapandi, R Anuradha, P. O Awoyera, R Gobinath, N Archana, M Berlin, and Olalusi B. Oladimeji
Silicon, ISSN: 1876990X, eISSN: 18769918, Published: 2020 Springer Science and Business Media LLC
Despite several studies focusing on producing sustainable concrete with nonconventional materials, there are short-term and long-term lapses in behavior of some of the concretes. This study, with a main focus on durability performance, explores strength and behavior of manufactured sand concrete containing alcofine and zinc oxide in severe environmental conditions. Alcofine and zinc oxide were added to the mixture at 10% and 2% by weight of cement, respectively. Manufactured Sand was used as a partial replacement for river sand at 25%, 50%, 75% and 100%. The compressive strength, split tensile strength and flexural strength of the concrete were determined after standard curing regimes. Durability tests, entailing exposure of concrete to acid attack, sea water, water absorption, sulphate attack, water permeability and rapid chloride penetration, were also performed. The results show that mixture made with 50% manufactured sand 10 %Alccofine and 0.5% Zinc oxide replacement, demonstrated better durability.
Murthi Palanisamy, Poongodi Kolandasamy, Paul Awoyera, Ravindran Gobinath, Sivaraja Muthusamy, Thirumalai Raja Krishnasamy, and Amelec Viloria
Journal of Materials Research and Technology, ISSN: 22387854, Published: 2020 Elsevier BV
Abstract Liquid substance intrusion into concrete is one of the issues that gradually damage its physical and structural integrity. The permeability properties of lightweight self-consolidating concrete containing coconut shell aggregate was investigated in this study. A partial replacement of crushed rock (granite) with coconut shell from 0 to 100% in step of 25% was considered for the mixtures. Rice husk ash (RHA) and Silica fume (SF) were considered for developing binary and ternary blended self-consolidating concrete with total powder content of 450 kg/m3 and 550 kg/m3. The testing of concrete involved the saturated water absorption, sorptivity and chloride ingress, which were used to examine the permeability properties of the concrete developed. The laboratory investigations showed encouraging results with better performance up to 75% replacement of crushed granite with coconut shell aggregate.
P. O. Awoyera, S. Karthik, P. R. M. Rao, and R. Gobinath
Innovative Infrastructure Solutions, ISSN: 23644176, eISSN: 23644184, Published: 1 December 2019 Springer Science and Business Media LLC
Of many fast growing grasses around the world, bamboo has been persistently investigated as a possible reinforcing element in concrete. In addition to the existing knowledge on the subject, this study has performed an experimental and numerical analysis of flexural behaviour of large-scale bamboo-reinforced concrete beams containing crushed sand. The crushed sand was used as complete replacement of natural river sand at 0 and 100%, while bamboo was substituted for steel reinforcement bars at 50 and 100%. Other concrete ingredients cement, granite, and mixing water were kept constant. Curing of hardened beams was by immersion in water for 28, 56, and 84 days’ regimes. Finite element/numerical modelling and analysis of beams was performed using ABAQUS software. A nonlinear model analysis with static loading was considered with a predefined 3D model. The concrete fracture pattern was smeared crack, in the mode I. The results showed that a partial (50%) or total (100%) replacement of steel with bamboo and total replacement of natural river sand with crushed sand gave somewhat similar performance in flexure as the control beams. As expected, steel-reinforced beams were better in terms of strength across all curing regimes; however, members reinforced with 50% bamboo, although with about 14% lesser strength but having minimal deformation and crack propagation, can also be a sustainable alternative for construction. Overall, the results somewhat validate the obtained experimental flexural strength of the beams.
K. Poongodi, P. Murthi, P. O. Awoyera, and R. Gobinath
IOP Conference Series: Materials Science and Engineering, ISSN: 17578981, eISSN: 1757899X, Volume: 561, Published: 12 November 2019 IOP Publishing
International Journal of Innovative Technology and Exploring Engineering, eISSN: 22783075, Pages: 33-38, Published: November 2019 Blue Eyes Intelligence Engineering and Sciences Engineering and Sciences Publication - BEIESP
he mechanical properties of pavement quality concrete using recycled concrete aggregate (RCA) obtained from the concrete debris as coarse aggregate (CA) are experimentally determined and presented in this paper. M40 grade concrete was tested with conventional granite CA before adding RCA and then CA was replaced by RCA at the rate of 10, 20, 30, 40 and 50%. The concrete was tested in fresh state by slump and compaction factor (CF) value to evaluate variations in workability. The compressive strength and flexural strength of concrete were conducted to ascertain performance in hardened state. The water absorption test was conducted as a part of durability test. The gradual reduction of slump value was noticed after adding RCA as aggregate in concrete. The slump value had been maintained by substituting the superplastizer without varying the w/c ratio. The strength properties were calculated after 3, 7 and 28 days curing. No significant reduction of strength was observed up to the 30% replacement of RCA and the strength was reduced by adding more than 30% of RCA. From the results obtained in this investigation, it was concluded that the RCA could be used up to 40% as CA for pavement quality concrete.
Paul O. Awoyera, Adeyemi Adesina, and Ravindran Gobinath
Australian Journal of Civil Engineering, ISSN: 14488353, Pages: 85-95, Published: 3 July 2019 Informa UK Limited
ABSTRACT There are limitations that are associated with recycled aggregate concrete (RAC), with regards to strength, durability and micro scale features. These have led to the use of artificial admixtures for modifying concrete properties. This review dwells on the use of fillers to improve the mechanical and microstructural properties of RAC. Fillers are sourced naturally or processed from industrial and construction sector wastes, and they are added into concrete to modify or enhance its workability, strength and micro scale properties. Despite the increasing use of aggregate sourced from construction and demolition activities for the production of fresh concrete, studies have shown that the strength, among other properties of the new concrete are inferior to that of conventional concrete. To take care the defects resulting from recycled aggregate in fresh and hardened concrete, various filler materials are used in the concrete. The performance of various fillers previously used in RAC is highlighted and recommendations were made for further studies and applications.
S. Thahira Banu, G. Chitra, P. O. Awoyera, and R. Gobinath
Australian Journal of Structural Engineering, ISSN: 13287982, Pages: 198-203, Published: 3 July 2019 Informa UK Limited
ABSTRACT Generally, it is known that concrete and its embedded steel reinforcement progressively deteriorate when exposed to aggressive environments, yet when this defect deepens it leaves the concrete structure in unserviceable state. Therefore, the current study aims to evaluate the bending characteristics of corroded fly ash based fibre retrofitted concrete beams. Thus, the study attempts to measure the corrosion inhibition characteristics of fibre retrofitted reinforced concrete beams. Aside beams produced with conventional materials, other beams were produced with fly ash fixed at 30% replacement of Ordinary Portland Cement. Beams were cured in water for up to 34 days before they were induced in simulated corrosive environment. Some corroded beams were retrofitted with basalt fibre and others with sisal fibre, before being subjected to bending test. Despite the evident deterioration resulting from corrosion, the results clearly indicated that the fibres provided additional strengths to the corroded beams, with basalt fibre producing better response to loading at about 18% capacity than control beam before failure. Basalt fibre has been found to enhance the structural bending capacity of corroded member.
International Journal of Recent Technology and Engineering, eISSN: 22773878, Pages: 445-452, Published: May 2019
S. Anandaraj, Jessy Rooby, P.O. Awoyera, and R. Gobinath
Construction and Building Materials, ISSN: 09500618, Volume: 197, Pages: 862-870, Published: 10 February 2019 Elsevier BV
K. Rajesh Kumar, R. Gobinath, G. Shyamala, Emelec Viloria, and Noel Varela
Materials Today: Proceedings, eISSN: 22147853, Pages: 664-670, Published: 2019 Elsevier BV
Abstract The research is undertaken to study the combined reinforcing and stabilizing effect of Eco sand, Metakaolin added with Polypropylene fibers in silty soil obtained from Nilgris district. In this work, an effort is made to obtain the impact of adding polypropylene fibers in fixed ratios (eco sand10%_metakaolin 5%) tandem with two novel stabilizing agents in various proportions (polypropylene fiber 0.1% & 0.2%) is the effects of non-traditional additives on the geotechnical properties of soils have been the focus of much investigation in recent years. It has been well established that the plasticity index and also the size, shape, and arrangement of soil particles will affect the treatment process of natural soils with additives. Stabilization of soils that are subjected to a regular variation in the temperature requires the most probable selection of suitable stabilizers and admixtures to improve the strength of the soil. This study investigates the resistance of the Nilgiris soil over the freeze–thaw reaction. The soil is stabilized with Eco Sand, Metakaolin, and polypropylene fiber (synthetic fiber). The index and engineering properties of the soil were determined in the laboratory. The soil is stabilized with two variants of an equal proportion of EcoSand-10%, Metakaolin-5%, and varying the polypropylene fiber in a proportion of 0.1% and 0.2% with the weight of the soil. UCS test was conducted for the virgin sample as well as the sample after four freeze–thaw cycles. The soil sample is kept at 0° for 24 h and later at 28° for 24 h to complete a cycle. It is determined that the admixtures added has increased the resistance of the soil over the freeze–thaw reaction after the cycles. The polypropylene fiber has increased the bonding of soil, and hence it stabilizes the soil during a large periodical variation in the temperature of the soil.
A. Adesina, P.O. Awoyera, A. Sivakrishna, K. Rajesh Kumar, and R. Gobinath
Materials Today: Proceedings, eISSN: 22147853, Pages: 391-395, Published: 2019 Elsevier BV
Abstract The increasing running costs of buildings due to the corresponding high energy usage has called for a need to find innovative alternatives to reduce the energy demand of buildings. Advances in material technology in the last two decades have shown that the incorporation of phase change materials (PCMs) into the most used building material in the world (i.e. concrete) is one of the ways to tackle the building energy problem. Phase change materials are capable of absorbing and releasing energy based on the temperatures they are exposed to. However, as it is well known that the incorporation of any material into concrete alter its performance, the incorporation of PCMs is not an exception. Therefore, it orders to foster more awareness about the innovative ways to ensure the sustainability of buildings and the construction industry in general, this overview was carried out to present the effect of PCMs on various properties of concrete. This overview gives a summary of the effect of PCMs on fresh, mechanical and durability properties of concrete. Conclusions from this overview show that the incorporation of PCMs has some detrimental effect on the mechanical and some durability properties of concrete. Nevertheless, in addition to the thermal advantage of incorporating PCMs into concrete, cracks due to thermal cracking are prevented.
Journal of Engineering Science and Technology, ISSN: 18234690, Pages: 2386-2398, Published: 2019
R. Gobinath, G. Raja, E. Prasath, G. Shyamala, Amelec Viloria, and Noel Varela
Materials Today: Proceedings, eISSN: 22147853, Pages: 657-663, Published: 2019 Elsevier BV
Abstract The rapid growth in industrialization and population leads to generation of large quantity of wastes, some materials were containing high silica contents is damped as a waste. In this study such damped silica wastes from various industries is collected and subjected to studies as a stabilizing material for black cotton soils, such assorted materials are Fly ash, GGBS, Rice husk ash, Precipitated silica and Calcium chloride. By effective nanoparticle studies like SEM, EDAX, presence of silica, aluminum and magnesium proportion in each industrial waste is formulated. From the result of nanoparticle analysis novel silica combination prepared by composition of all those materials based on cementanious action mineral presence. In before studies one or two combinations only used as stabilizer but in this paper a new group bearing binder combination is designed and their behavior with chosen geo material and its respective engineering, strength and hydraulic properties is studied by Constantine combination proportion to 20% to weight of soil. Properties such as California bearing ratio (CBR), and North Dakota of the soils were determined with the addition of stabilizers. From the results engineering properties of the poor engineering graded soil were improved is clearly visualized. For the normal soil and effective result binder proportion, a comparison in finite element analysis using PLAXIS is carried out for footing study. Finally, the study showed that exact cementanious mineral combination from industrial waste could improve the geotechnical properties of highly inorganic soil.
P.O. Awoyera, A. Adesina, A. Sivakrishna, R. Gobinath, K. Rajesh Kumar, and A. Srinivas
Materials Today: Proceedings, eISSN: 22147853, Pages: 40-43, Published: 2019 Elsevier BV
Abstract Alkali activated binders (AAB) are gaining huge research attention in recent years, due to their potential to totally be used in a zero-cement composite. Ordinary Portland cement (OPC) is characterized by high energy usage and carbon emission from its production process, which thus shows the need for AAB development. AAB are a sustainable replacement for OPC, as they can be produced from waste materials generated by various industrial processes. This paper explored the properties of different types of waste used as a solitary and binary combination for AAB, alongside their effects on the resulting composites. A general summary of the opportunities of AABs are also discussed. It was concluded that, with more research and developments dedicated to the field of AAB, AAB can be practical replacement of OPC for large-scale applications in the near future.
S. Anandaraj, Jessy Rooby, Gobinath Ravindran, Arun Kumar Beerala, Vikram Mulukalla, and Swathi Koduri
Proceedings of IEEE International Conference on Intelligent Computing and Communication for Smart World, I2C2SW 2018, Pages: 357-363, Published: December 2018 IEEE
Modern construction material research is picking impetus in the recent two decades; a greater number of admixtures and combinations were tried by bountiful researchers across the globe. In this work an attempt is made to obtain the strength characteristics by using Soft computing techniques in the marble and quarry dust impregnated concrete. Strength characteristics of concrete is studied with reference to the addition of the above-mentioned admixtures and the results were given as input parameters. 28 days compressive strength of concrete with varying marble and quarry dust content is utilized as input data for the neural network and a model is created which is used to predict the strength. To prepare the ANN model the results are taken and the values obtained are mean square propagation and the testing, training, validation and for overall propagation the values are 0.99793, 0.99577, 0.9927 and 0.99073 and the best validation performance is 0.023295 at epoch 7 respectively for MD and for QD the values are 0.9974, 0.94374, 0.94445 and 0.947 and the best validation performance is 0.035578 at epoch 4 respectively. It is found that neural network can be utilized effectively to predict the strength characteristics of concrete.
K. Poongodi, P. Murthi, M. Shivaraj, Arun Kumar Beerala, Sangeetha Gaikadi, A. Srinivas, and R. Gobinath
Proceedings of IEEE International Conference on Intelligent Computing and Communication for Smart World, I2C2SW 2018, Pages: 364-370, Published: December 2018 IEEE
In this experimental investigation, lightweight self-consolidating concrete (LWSCC) was developed with coconut shell as coarse aggregate. The effect of coconut shell aggregate (CSA) on bond strength and impact strength of Rice Husk Ash (RHA) based binary blended and RHA + Silica fume (SF) based ternary blended Self consolidating concrete (SCC) were determined. The bond strength was determined through pull-out test and the impact strength was calculated using falling weight test. The concrete mix was developed with the total powder content of 450 kg/m3. The coarse aggregate content was replaced by CSA in the gradation of 0%, 25%, 50%, 75% and 100% in the designated SCC. The investigation revealed that the bond and impact strength of CSA based LWSCC were comparable to current code practice and other lightweight concretes. The experimental data obtained was used to develop an ANN model for predicting the strength characteristics of fresh or hardened concrete. The high regression values obtained during training the neural network models reveals high accuracy and were predicting the strength characteristics very similar to the experimental results.
Palanisamy Murthi, Paul Awoyera, Palanisamy Selvaraj, Devi Dharsana, and Ravindran Gobinath
Australian Journal of Civil Engineering, ISSN: 14488353, Pages: 122-128, Published: 3 July 2018 Informa UK Limited
ABSTRACT Environmental degradation is a major challenge in the developing countries, which are caused due to unmanaged solid waste, or improper disposal. This study investigates the effect of using silica mineral waste (eco sand) as aggregate in a green high strength concrete, in which properties such as workability, strength, failure mode, and morphology were determined. There was low slump and compacting factor in all the concrete mixtures, however, strength properties were improved with the incorporation of eco sand as a replacement of conventional fine aggregate. Higher strength properties were achieved in the eco sand concrete than the reference mixtures, which occurred at an optimum eco sand content of 25%. The morphology and failure mode of the eco sand concrete showed that there was a significant compactness and constituents parking in the matrix.
International Journal of Engineering and Technology(UAE), eISSN: 2227524X, Issue: 3.34 Special Issue 34, Pages: 300-304, Published: 2018
Ecology, Environment and Conservation, ISSN: 0971765X, Pages: 909-915, Published: 2018
Ecology, Environment and Conservation, ISSN: 0971765X, Pages: 353-357, Published: 2018
IET Conference Publications, Volume: 2018, Issue: CP750, Published: 2018
Revista Romana de Materiale/ Romanian Journal of Materials, ISSN: 15833186, eISSN: 2457502X, Pages: 208-213, Published: 2018
G. P. Ganapathy, R. Gobinath, I. I. Akinwumi, S. Kovendiran, M. Thangaraj, N. Lokesh, S. Muhamed Anas, R. Arul murugan, P. Yogeswaran, and S. Hema
International Journal of Civil Engineering, ISSN: 17350522, eISSN: 23833874, Pages: 401-409, Published: 1 May 2017 Springer Science and Business Media LLC
R. Gobinath, G. P. Ganapathy, I. I. Akinwumi, S. Kovendiran, S. Hema, and M. Thangaraj
Journal of Central South University, ISSN: 20952899, eISSN: 22275223, Pages: 2688-2694, Published: 1 October 2016 Springer Science and Business Media LLC
The suitability of using precipitated silica (PS) from the burning of rice husk was investigated to improve the geotechnical engineering properties of a black cotton soil. A laboratory experimental program consisting of series of specific gravity, Atterberg limits, compaction, California bearing ratio (CBR), unconfined compression and consolidation tests was conducted on the untreated and PS treated soil samples. The application of PS to the soil significantly changed its properties by reducing its plasticity and making it more workable, improving its soaked strength, and increasing its permeability and the rate at which the soil gets consolidated. An optimal PS content of 50%, which provided the highest soaked strength, is recommended for the improvement of the subgrade characteristics of the BC soil for use as a pavement layer material.
Journal of Chemical and Pharmaceutical Sciences, ISSN: 09742115, Pages: 770-774, Published: October-December 2015
Journal of Chemical and Pharmaceutical Sciences, ISSN: 09742115, Pages: 790-792, Published: October-December 2015
Journal of Materials and Environmental Science, ISSN: 20282508, Pages: 2681-2687, Published: 2015
Pollution Research, ISSN: 02578050, Pages: 179-186, Published: 2015
Pollution Research, ISSN: 02578050, Pages: 209-214, Published: 2015
Clay Research, ISSN: 02557193, eISSN: 09744509, Pages: 59-65, Published: 2015
International Journal of Earth Sciences and Engineering, ISSN: 09745904, Pages: 1526-1531, Published: 2015
International Journal of Earth Sciences and Engineering, ISSN: 09745904, Pages: 1514-1519, Published: 2015
Ecology, Environment and Conservation, ISSN: 0971765X, Pages: 1333-1337, Published: 2014
Pollution Research, ISSN: 02578050, Pages: 79-88, Published: 2014
Ecology, Environment and Conservation, ISSN: 0971765X, Pages: 385-390, Published: 2013
Tiam-Ting Tee, Lee Tin Sin, R. Gobinath, Soo-Tueen Bee, David Hui, A.R. Rahmat, Ing Kong, and QingHong Fang
Composites Part B: Engineering, ISSN: 13598368, Pages: 238-247, Published: April 2013 Elsevier BV
It was found that the addition of montmorillonite (MMT) at low amount (<5 phr) exhibited reinforcing effect in neat PVOH, whereas higher amount can cause agglomeration leading to decrease of mechanical strength. Nevertheless, such inferior effect is not observed when MMT added in 50% PVOH–starch blends with the tensile strength increased in relation to the amount of MMT added. Besides, higher enthalpy of melting was detected in MMT added PVOH–starch blends via differential scanning calorimetry. This indicates that addition of MMT in PVOH–starch blend showed favorable molecular bonding interactions. From the morphology analysis, PVOH and starch seemed to interact in homogenous condition through the exfoliation of MMT as observed. It was also found that the infrared wavenumber of the hydroxyl group for both neat PVOH and 50% PVOH–starch samples reduced gradually with the increasing amount of MMT. The addition of MMT has shown the ‘‘red shift’’ effect indicating the formation of hydrogen bonding induced by MMT. In conclusion, the blending of MMT in both PVOH and PVOH–starch are favorable to produce superior properties of the resulting blends.
Gobinath Ravindran and R. Nagendran
Journal of Urban and Environmental Engineering, eISSN: 19823932, Pages: 29-36, Published: 2010 Journal of Urban and Environmental Engineering
Baskar Ganeshkumar, R. Gobinath, and N. Mahendran
Proceedings - 2009 International Conference on Computer Engineering and Technology, ICCET 2009, Pages: 569-573, Published: 2009 IEEE
Sustainable development is widely practiced by many engineers, academicians and policy makers for making the industries environmental friendly, to obtain sustainability in any industry there are many methods. Resources utilized in an industry should be identified properly in various processes and its utilization is to be optimized to increase the environmental performance of the industry. Ecomapping is a visual, simple and practical tool to analyze, manage, and communicate the environmental performance of industries in developing economies. Ecomapping is creative and helps small SME’s to implement environmental management systems like ISO 140001 and EMAS. Ecomap if properly employed will increase the sustainability of the industries and also helps in reducing the resource utilization and enhances the productivity. Even though the Ecomapping can be done manually, using GIS will enhance the productivity, enables clear detailing of resource identification and mapping. This paper provides an insight into Ecomapping, its advantages, preparing ecomap for an industry using GIS.
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Anna University, Chennai
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