I have obtained my Bacheoler’s degree from G.Pulla Reddy Engineering College, Kurnool, A.P and Master’s Degree in Computer Aided Structural Engineering from Jawaharlal Nehru Technological University, Anantapur. I am currently working as an Assistant Professor in the Department of Civil Engineering, Mahatma Gandhi Institute of Technology, affiliated to Jawaharlal Nehru Technological University, Hyderabad. I have 14 years of experience, which includes four years of industrial experience and ten years of teaching experience. I have published 9 research papers in International Journals. My interests include Innovative materials and techniques in concrete construction
Turkish Journal of Computer and Mathematics Education, 2021
The Construction industry is playing a vital role in the deterioration of the environment by depl... more The Construction industry is playing a vital role in the deterioration of the environment by depleting natural resources, utilizing huge quantities of energy from fossil fuels. Conventional concrete production which uses cement as a constituent is one of the major contributors to emissions of greenhouse gases. Usage of Alkali-activated concrete is gaining importance in the recent past since it imparts less carbon footprint on the environment. Other eco-friendly alternative solutions can be adopted to reduce the depletion of resources. In the present study, Egg Shell Powder (ESP) and GGBS are used as an alternate source of the binder. Eggshell powder and GGBS can be activated through the alkaline solution, which polymerizes these materials into molecular chains and networks to create a hardened binder. In this paper apart from Eggshell powder and GGBS, Robo sand which is an excellent substitute for depleting natural sand was used which makes the alkaliactivated concrete furthermore advantageous. In this paper, the results of the detailed study done on alkali-activated concrete immersed in HCL and H2SO4 are presented. Workability test is done on fresh concrete and durability, compressive strength test is done on hardened concrete. Compressive strength of alkali-activated concrete has been reported with varying percentages of GGBS and ESP (G90E10, G80E20, G70E30, G60E40) at 8, 10 and 12 Molarities. NaOH and Na2Sio3 are used as Alkali Activators. Also, results of percentage loss in Compressive strength and Weight of cubes immersed in HCL and H2So4 are presented.
International Journal of Engineering and Advanced Technology (IJEAT) ISSN: 2249 – 8958, Volume-2, Issue-2, December 2012, 2012
Burnt Clay Brick is the predominant construction material in the country. The CO 2 emissions in t... more Burnt Clay Brick is the predominant construction material in the country. The CO 2 emissions in the brick manufacture process have been acknowledged as a significant factor to global warming. The focus is now more on seeking environmental solutions for greener environment. The usage of Cellular Lightweight Concrete (CLC) blocks gives a prospective solution to building construction industry along with environmental preservation. In this paper, an attempt is made to compare CLC Blocks and Clay Bricks, and recommend a replacement material to red brick in construction industry.
ernational Journal of Civil Engineering and Technology (IJCIET), ISSN 0976 – 63, 2013
A green building is an environmentally sustainable building, designed, constructed and operated t... more A green building is an environmentally sustainable building, designed, constructed and operated to minimise the total environmental impacts. The Green Building Index (GBI) is recognised green rating tool for constructions to promote sustainability in the built environment and raise awareness among various groups in construction industry and the Public about environmental issues and our responsibility to the future generations. Carbon dioxide (CO 2) is the primary greenhouse gas emitted through human activities. It is claimed that 5% of the world's carbon dioxide emission is attributed to cement industry, which is the vital constituent of concrete. Due to the significant contribution to the environmental pollution, there is a need for finding an optimal solution along with satisfying the civil construction needs. Apart from normal concrete bricks, Foam concrete is a new innovative technology for sustainable building and civil construction which fulfils the criteria of being a Green Material. This paper concludes that Foam Concrete can be an effective sustainable material for construction and also focuses on the cost effectiveness in using Foam Concrete as a building material in comparison with Clay Brick.
Cellular concrete is a solution in which coarse aggregates have been replaced altogether by air o... more Cellular concrete is a solution in which coarse aggregates have been replaced altogether by air or gas in the form of tiny bubblesfor drastic weight reductions. It is a lightweight material that excels in thermal insulation and fire-resistance. A significant characteristic of foam concrete is the ability to control its density over a wide range, and this is achievable by adding a calculated amount of foam to the base mix. Foam concrete has gained importance because of its wide range of applications which include Thermal insulation, Fire resistance, Workability, Flow-ability, Sound absorption, Self-compacting, Density, Energy absorption etc. Thus cellular concrete is a problem solver for wide variety of challenges in construction, mining and manufacturing applications.
The aim of this paper is to investigate the influence of glass fibres on fresh and Hardened prope... more The aim of this paper is to investigate the influence of glass fibres on fresh and Hardened properties of High Strength Self Compacting Concrete using mineral admixtures Fly ash and Microsilica.Firstly six SCC mixes were designed by rational method of mix design and investigated for obtaining optimum dosage of fly ash and microsilica satisfying workability and compressive strength requirements. A Mix,M100 with addition of fly ash of 25% and Microsilica as 15% is finalized based on flow behavior and Compressive strength results. M100 mix is further investigated for its fresh and hardened properties with inclusion of glass fibres at 0.1%, 0.2%,0.3%and 0.4%. Fresh properties such as slump flow, V funnel and L-boxwere performed; Hardened concrete tests were limited to compressive strength, Split tensile strength and Flexural strength. The results revealed that workability decreases by inclusion of fibres. The strength values showed a improvement upto 0.3%addition of glass fibres.
Structural analysis comprises the set of physical laws and mathematics required to study and pred... more Structural analysis comprises the set of physical laws and mathematics required to study and predict the behaviour of structures. Structural analysis incorporates the fields of mechanics and dynamics as well as failure theories. From a theoretical perspective, the primary goal of structural analysis is computation of deformations, internal forces and stresses. Analysis involves assessment of various types of loads coming on to the structure and computation of member forces.Various methods of analysis were proposed to determine the internal forces in elements of structures. Approximate methods are quite handy when compared to methods of exact analysis but however the member forces may not be accurate. It is a customary to carry out the lateral load analysis separately and results are superimposed with the results of analysis for gravity loads to arrive at final moments. This work aims to study the performance of Portal Method, which is used to determine member forces for lateral load analysis. The wind loads are estimated using stipulated codes from India. A computer program in C Language was developed to calculate the member forces adhering to Portal method and results of Staad.Pro were used to compare through statistical parameters. It was concluded from the study that the results of Portal method are in close agreement with the Staad. Pro results when the height to width ratio is greater than five.
In the present era, sustainable materials and its innovations are in great demand due to continua... more In the present era, sustainable materials and its innovations are in great demand due to continual accumulation of different local wastes, which are creating environmental hazards. In the construction industry, cement contributes to about 7% of the green house gas emissions, in the form of CO 2 , into the atmosphere. In this perspective, partial substitution of cement by a material containing pozzolanic properties may enhance the mechanical properties of concrete. Flyash already proved itself as a supplementary cementitious material and the disposal problem of huge quantity of flyash from thermal power stations is minimized by replacing cement with some percentage of flyash. On the other side, glass is used in many forms in our everyday life. Its lifetime is limited. The storage or safe disposal of waste glass is an environmental issue and so there is a strong need to utilize waste glass. Hence, this research is planned to examine the potential of waste glass powder as a partial replacement of cement in concrete. Cement replacement by glass powder is done in the range 10% to 40% with an increment of 10%. Also cement is partially replaced with equal percentages of glass powder and flyash from 10% to 40%. It was tested by slump test and hardened properties by compressive strength test at 7, 14 and 28 days. Results show that 20% replacement of glass powder has highest compressive strength but the combination of glass powder and flyash 10% each is confirmed to be the optimum of all cases considered.
Utilization of recycled materials is the best choice in construction industry as it reduces dispo... more Utilization of recycled materials is the best choice in construction industry as it reduces disposal problems and is economical too. One such material which can be recycled and used in construction industry is glass. Glass is widely used in our day-today life but is least recycled material in India. Glass is non-biodegradable; landfills do not offer an appropriate solution for its safe disposal. Glass is predominantly composed of Silica. This paper aims to focus on replacing fine aggregate with different percentages of glass powder on different grades of concrete (M20, M25, M30, M35 and M40). For this purpose, fine aggregate replacement is done in the range of 10% to 50% at an interval of 10% and tested for compressive strength at age of 7 and 28 days. The optimal glass powder content to replace fine aggregate for different grades is obtained. The compressive test results indicated that recycled glass powder concrete gave better strength than conventional concrete. The best outcome of replacing fine aggregate with glass powder is at 20% but 30% replacement also showed marginal variation.
Foamed concrete is an inexpensive, sustainable product with competence as promising construction ... more Foamed concrete is an inexpensive, sustainable product with competence as promising construction material. FC has become popular due to its varying densities enabling dead load reduction, leading to saving in substructure construction. The quantity of foam included in the cement slurry is the principal source of the density of foam concrete. Twelve mixes of different densities (400kg/m 3 , 700kg/m 3 and 1000kg/m 3) with/without additives (fly ash, silica fume and polypropylene fiber) are casted and tested for compressive strength at age of 28 days. The SF and FA are replaced at a level of 15% and PPF is included at a volume fraction of 0.45. Tests were conducted on cubical specimens for different mix combinations and compared with control FC. The foam concrete strength declines with reducing density. The experimental results reveal an enrichment in the compressive strength with addition of polypropylene fibers. In addition, the compressive strength is improved with addition of fly ash and silica fume.
INTERNATIONAL JOURNAL OF CURRENT ENGINEERING AND SCIENTIFIC RESEARCH (IJCESR) ISSN (PRINT): 2393-8374, (ONLINE): 2394-0697, VOLUME-8, ISSUE-6, 2021, 2021
Roller Compacted Concrete (RCC) pavements are a hybrid approach by blending the conventional conc... more Roller Compacted Concrete (RCC) pavements are a hybrid approach by blending the conventional concrete and asphalt pavements. RCC uses asphalt machinery to achieve strength and performance as `that of conventional concrete. RCC is a no-slump non-reinforced concrete, whose pavements are strengthened by placement using high density paver machinery and compaction using vibratory rollers. RCC has been a trend in the recent era in view of its cost-effectiveness, quicker construction and durable performance. The objective of RCC is constructability with minimum compaction effort, achieving mechanical strengths, maintaining durability with low permeability and substantial savings in construction cost. This paper highlights the methodology and construction of RCC pavements, outlining its advantages and disadvantages Index Terms-Roller Compacted Concrete (RCC), Pavement, Soil compaction approach, Concrete consistency approach
SCC has become the most revolutionary development in concrete construction and nanotechnology, wh... more SCC has become the most revolutionary development in concrete construction and nanotechnology, which has attracted the interest of researchers, is considered as a special research prospective. The present work is carried out for self-compacting concrete M40 grade by replacing fly ash and nano-silica partially. The replacement of cement with fly ash is kept consistent in all the cases and the investigation focuses on the influence of distinct nano-silica (nS) percentages on the mechanical properties of hardened Self-Compacting Concrete (SCC). Detailed investigation has been carried out by substituting cement with 0.5% increment of Nanosilica from 0% till 2% i.e., at 0%, 0.5%, 1.0%, 1.5%, 2.0% for 7days, 14 days, 28 days, 56 days, 91 days and compressive, flexural and split tensile strengths have been studied. These strengths are further evaluated at 28 days for 3%, 4% and 6% Nanosilica replacements. Compared to the conventional mix, the presence of nano-silica with SCC showed an improvement in all the strengths of SCC. The enhancements in the strengths were prominent up to 4% and there was a decline in the strengths at 6% replacement of nS. The substantial improvement in the strengths of hardened SCC with Nanosilica was due to the smaller size of nano-silica particles which improves the pore structure characteristics. However, the addition of Nanosilica at 6% can cause agglomeration when mixed into SCC and hence, a reduction in the strengths is noticed. Nanosilica can also open the way to environmental preservation by maintaining the same strength with lesser cement content than conventional SCC.
Turkish Journal of Computer and Mathematics Education, 2021
The Construction industry is playing a vital role in the deterioration of the environment by depl... more The Construction industry is playing a vital role in the deterioration of the environment by depleting natural resources, utilizing huge quantities of energy from fossil fuels. Conventional concrete production which uses cement as a constituent is one of the major contributors to emissions of greenhouse gases. Usage of Alkali-activated concrete is gaining importance in the recent past since it imparts less carbon footprint on the environment. Other eco-friendly alternative solutions can be adopted to reduce the depletion of resources. In the present study, Egg Shell Powder (ESP) and GGBS are used as an alternate source of the binder. Eggshell powder and GGBS can be activated through the alkaline solution, which polymerizes these materials into molecular chains and networks to create a hardened binder. In this paper apart from Eggshell powder and GGBS, Robo sand which is an excellent substitute for depleting natural sand was used which makes the alkaliactivated concrete furthermore advantageous. In this paper, the results of the detailed study done on alkali-activated concrete immersed in HCL and H2SO4 are presented. Workability test is done on fresh concrete and durability, compressive strength test is done on hardened concrete. Compressive strength of alkali-activated concrete has been reported with varying percentages of GGBS and ESP (G90E10, G80E20, G70E30, G60E40) at 8, 10 and 12 Molarities. NaOH and Na2Sio3 are used as Alkali Activators. Also, results of percentage loss in Compressive strength and Weight of cubes immersed in HCL and H2So4 are presented.
International Journal of Engineering and Advanced Technology (IJEAT) ISSN: 2249 – 8958, Volume-2, Issue-2, December 2012, 2012
Burnt Clay Brick is the predominant construction material in the country. The CO 2 emissions in t... more Burnt Clay Brick is the predominant construction material in the country. The CO 2 emissions in the brick manufacture process have been acknowledged as a significant factor to global warming. The focus is now more on seeking environmental solutions for greener environment. The usage of Cellular Lightweight Concrete (CLC) blocks gives a prospective solution to building construction industry along with environmental preservation. In this paper, an attempt is made to compare CLC Blocks and Clay Bricks, and recommend a replacement material to red brick in construction industry.
ernational Journal of Civil Engineering and Technology (IJCIET), ISSN 0976 – 63, 2013
A green building is an environmentally sustainable building, designed, constructed and operated t... more A green building is an environmentally sustainable building, designed, constructed and operated to minimise the total environmental impacts. The Green Building Index (GBI) is recognised green rating tool for constructions to promote sustainability in the built environment and raise awareness among various groups in construction industry and the Public about environmental issues and our responsibility to the future generations. Carbon dioxide (CO 2) is the primary greenhouse gas emitted through human activities. It is claimed that 5% of the world's carbon dioxide emission is attributed to cement industry, which is the vital constituent of concrete. Due to the significant contribution to the environmental pollution, there is a need for finding an optimal solution along with satisfying the civil construction needs. Apart from normal concrete bricks, Foam concrete is a new innovative technology for sustainable building and civil construction which fulfils the criteria of being a Green Material. This paper concludes that Foam Concrete can be an effective sustainable material for construction and also focuses on the cost effectiveness in using Foam Concrete as a building material in comparison with Clay Brick.
Cellular concrete is a solution in which coarse aggregates have been replaced altogether by air o... more Cellular concrete is a solution in which coarse aggregates have been replaced altogether by air or gas in the form of tiny bubblesfor drastic weight reductions. It is a lightweight material that excels in thermal insulation and fire-resistance. A significant characteristic of foam concrete is the ability to control its density over a wide range, and this is achievable by adding a calculated amount of foam to the base mix. Foam concrete has gained importance because of its wide range of applications which include Thermal insulation, Fire resistance, Workability, Flow-ability, Sound absorption, Self-compacting, Density, Energy absorption etc. Thus cellular concrete is a problem solver for wide variety of challenges in construction, mining and manufacturing applications.
The aim of this paper is to investigate the influence of glass fibres on fresh and Hardened prope... more The aim of this paper is to investigate the influence of glass fibres on fresh and Hardened properties of High Strength Self Compacting Concrete using mineral admixtures Fly ash and Microsilica.Firstly six SCC mixes were designed by rational method of mix design and investigated for obtaining optimum dosage of fly ash and microsilica satisfying workability and compressive strength requirements. A Mix,M100 with addition of fly ash of 25% and Microsilica as 15% is finalized based on flow behavior and Compressive strength results. M100 mix is further investigated for its fresh and hardened properties with inclusion of glass fibres at 0.1%, 0.2%,0.3%and 0.4%. Fresh properties such as slump flow, V funnel and L-boxwere performed; Hardened concrete tests were limited to compressive strength, Split tensile strength and Flexural strength. The results revealed that workability decreases by inclusion of fibres. The strength values showed a improvement upto 0.3%addition of glass fibres.
Structural analysis comprises the set of physical laws and mathematics required to study and pred... more Structural analysis comprises the set of physical laws and mathematics required to study and predict the behaviour of structures. Structural analysis incorporates the fields of mechanics and dynamics as well as failure theories. From a theoretical perspective, the primary goal of structural analysis is computation of deformations, internal forces and stresses. Analysis involves assessment of various types of loads coming on to the structure and computation of member forces.Various methods of analysis were proposed to determine the internal forces in elements of structures. Approximate methods are quite handy when compared to methods of exact analysis but however the member forces may not be accurate. It is a customary to carry out the lateral load analysis separately and results are superimposed with the results of analysis for gravity loads to arrive at final moments. This work aims to study the performance of Portal Method, which is used to determine member forces for lateral load analysis. The wind loads are estimated using stipulated codes from India. A computer program in C Language was developed to calculate the member forces adhering to Portal method and results of Staad.Pro were used to compare through statistical parameters. It was concluded from the study that the results of Portal method are in close agreement with the Staad. Pro results when the height to width ratio is greater than five.
In the present era, sustainable materials and its innovations are in great demand due to continua... more In the present era, sustainable materials and its innovations are in great demand due to continual accumulation of different local wastes, which are creating environmental hazards. In the construction industry, cement contributes to about 7% of the green house gas emissions, in the form of CO 2 , into the atmosphere. In this perspective, partial substitution of cement by a material containing pozzolanic properties may enhance the mechanical properties of concrete. Flyash already proved itself as a supplementary cementitious material and the disposal problem of huge quantity of flyash from thermal power stations is minimized by replacing cement with some percentage of flyash. On the other side, glass is used in many forms in our everyday life. Its lifetime is limited. The storage or safe disposal of waste glass is an environmental issue and so there is a strong need to utilize waste glass. Hence, this research is planned to examine the potential of waste glass powder as a partial replacement of cement in concrete. Cement replacement by glass powder is done in the range 10% to 40% with an increment of 10%. Also cement is partially replaced with equal percentages of glass powder and flyash from 10% to 40%. It was tested by slump test and hardened properties by compressive strength test at 7, 14 and 28 days. Results show that 20% replacement of glass powder has highest compressive strength but the combination of glass powder and flyash 10% each is confirmed to be the optimum of all cases considered.
Utilization of recycled materials is the best choice in construction industry as it reduces dispo... more Utilization of recycled materials is the best choice in construction industry as it reduces disposal problems and is economical too. One such material which can be recycled and used in construction industry is glass. Glass is widely used in our day-today life but is least recycled material in India. Glass is non-biodegradable; landfills do not offer an appropriate solution for its safe disposal. Glass is predominantly composed of Silica. This paper aims to focus on replacing fine aggregate with different percentages of glass powder on different grades of concrete (M20, M25, M30, M35 and M40). For this purpose, fine aggregate replacement is done in the range of 10% to 50% at an interval of 10% and tested for compressive strength at age of 7 and 28 days. The optimal glass powder content to replace fine aggregate for different grades is obtained. The compressive test results indicated that recycled glass powder concrete gave better strength than conventional concrete. The best outcome of replacing fine aggregate with glass powder is at 20% but 30% replacement also showed marginal variation.
Foamed concrete is an inexpensive, sustainable product with competence as promising construction ... more Foamed concrete is an inexpensive, sustainable product with competence as promising construction material. FC has become popular due to its varying densities enabling dead load reduction, leading to saving in substructure construction. The quantity of foam included in the cement slurry is the principal source of the density of foam concrete. Twelve mixes of different densities (400kg/m 3 , 700kg/m 3 and 1000kg/m 3) with/without additives (fly ash, silica fume and polypropylene fiber) are casted and tested for compressive strength at age of 28 days. The SF and FA are replaced at a level of 15% and PPF is included at a volume fraction of 0.45. Tests were conducted on cubical specimens for different mix combinations and compared with control FC. The foam concrete strength declines with reducing density. The experimental results reveal an enrichment in the compressive strength with addition of polypropylene fibers. In addition, the compressive strength is improved with addition of fly ash and silica fume.
INTERNATIONAL JOURNAL OF CURRENT ENGINEERING AND SCIENTIFIC RESEARCH (IJCESR) ISSN (PRINT): 2393-8374, (ONLINE): 2394-0697, VOLUME-8, ISSUE-6, 2021, 2021
Roller Compacted Concrete (RCC) pavements are a hybrid approach by blending the conventional conc... more Roller Compacted Concrete (RCC) pavements are a hybrid approach by blending the conventional concrete and asphalt pavements. RCC uses asphalt machinery to achieve strength and performance as `that of conventional concrete. RCC is a no-slump non-reinforced concrete, whose pavements are strengthened by placement using high density paver machinery and compaction using vibratory rollers. RCC has been a trend in the recent era in view of its cost-effectiveness, quicker construction and durable performance. The objective of RCC is constructability with minimum compaction effort, achieving mechanical strengths, maintaining durability with low permeability and substantial savings in construction cost. This paper highlights the methodology and construction of RCC pavements, outlining its advantages and disadvantages Index Terms-Roller Compacted Concrete (RCC), Pavement, Soil compaction approach, Concrete consistency approach
SCC has become the most revolutionary development in concrete construction and nanotechnology, wh... more SCC has become the most revolutionary development in concrete construction and nanotechnology, which has attracted the interest of researchers, is considered as a special research prospective. The present work is carried out for self-compacting concrete M40 grade by replacing fly ash and nano-silica partially. The replacement of cement with fly ash is kept consistent in all the cases and the investigation focuses on the influence of distinct nano-silica (nS) percentages on the mechanical properties of hardened Self-Compacting Concrete (SCC). Detailed investigation has been carried out by substituting cement with 0.5% increment of Nanosilica from 0% till 2% i.e., at 0%, 0.5%, 1.0%, 1.5%, 2.0% for 7days, 14 days, 28 days, 56 days, 91 days and compressive, flexural and split tensile strengths have been studied. These strengths are further evaluated at 28 days for 3%, 4% and 6% Nanosilica replacements. Compared to the conventional mix, the presence of nano-silica with SCC showed an improvement in all the strengths of SCC. The enhancements in the strengths were prominent up to 4% and there was a decline in the strengths at 6% replacement of nS. The substantial improvement in the strengths of hardened SCC with Nanosilica was due to the smaller size of nano-silica particles which improves the pore structure characteristics. However, the addition of Nanosilica at 6% can cause agglomeration when mixed into SCC and hence, a reduction in the strengths is noticed. Nanosilica can also open the way to environmental preservation by maintaining the same strength with lesser cement content than conventional SCC.
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