Rathish Kumar Pancharathi

Rathish Kumar Pancharathi
National Institute of Technology, Warangal | NITW · Department of Civil Engineering

Doctor of Engineering

About

79
Publications
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248
Citations

Publications

Publications (79)
Article
Image-based deterioration analysis deals with estimating the correlation between the extent of deterioration in terms of changes in colour profiles of deteriorated surfaces with changes in the residual strength and durability. Analysis was performed on images of cubes of concrete immersed in acid, chloride and sulphate at 5% concentration for a per...
Article
Lime was one of the predominantly used construction materials during ancient times world over. However, its prominence was repressed with the invention of cement. Though cement was found to be useful in many applications in construction industry, it was ascertained detrimental as a repair material particularly for heritage structures. The primary r...
Article
This study presents a methodology for imaging-based quantification of deterioration in concrete structures due to various chemical attacks, using HSI colour space. In this study, M30grade of concrete samples are exposed to various deterioration agents like 5% concentrated solutions of NaCl, HCl, H2SO4 and MgSO4 for a period of 3,7,14 and 28 days re...
Article
Full-text available
Fiber Bragg grating (FBG) sensors are gaining prominence as contact sensors to find the field of displacement and strain measurements in recent times for structural health monitoring (SHM) applications, whereas digital image correlation (DIC) is a proven and widely used non-contact optical measurement method for finding displacement and strains dev...
Book
Full-text available
The edited book comprises invited book chapter contributions from global experts in the field of sustainable materials and resilient infrastructure. The book covers the most critical and emerging topics for creating sustainable solutions for the construction industry, promoting the technologies and monitoring methods for resilient infrastructure. I...
Article
estoration and preservation of Heritage Structures in any country is a challenging task and sometimes requires urgent attention. Mo-reover, it is important for sustenance of culture and heritage of the society. But many times, it is very diffi cult to fi nd matching materials used in the past and hence due to use of available cementitious materials...
Article
Self-compacting concrete has become a common material in the current scenario of construction of large and complicated structures with heavy reinforcement and complex shapes. Using normal concrete in such situations can often result in inadequate compaction affecting the performance and long-term durability of structures. Also, the use of recycled-...
Article
n recent years, there is a lot of research focus on developing new construction and repair techniques to meet the demands of the modern society. In view of this, there is a huge burden on the naturally available building materials and these are getting depleted. There is a need to think of alternate to the natural materials which are soon going to...
Article
Internal curing can be adopted to ensure the availability of water for the hydration of cement, mitigating the adverse effect of water loss to surroundings. The use of self-curing compounds is increasing in the context of the widespread use of self-compacting concrete (SCC) owing to its superior performance in both fresh and hardened states. This p...
Article
Curing of concrete involves maintaining satisfactory moisture content during early stages to develop the desired properties. Properly cured concrete has improved durability and surface hardness, and is less permeable. Prevention of loss of moisture is important not only for strength development but also to prevent plastic shrinkage, for decreased p...
Article
Inaccessibility and subjectivity in damage evaluation during visual inspection may often lead to faulty assessment of concrete. Digital imaging tools can be used to identify and quantify the extent of distress due to deteriorating agents on concrete. Structures subjected to environmental degradation manifest deterioration in terms of changes in sur...
Article
Full-text available
Geopolymer Concrete (GPC) is an evolving construction material well known for its environmental benefits derived from different aluminosilicate sources. However, fly ash-based geopolymer concrete normally requires thermal treatment for curing to attain compressive strength that again leads to increasing in the carbon footprint and manufacturing cos...
Article
The bond between steel and concrete is an important phenomenon for the composite behaviour of Reinforced Concrete (RCC). This bond is affected by different parameters like type of bar, diameter of bar and grade of concrete etc. In the present study, these parameters were considered and investigated for their effect on the bond behaviour in self-com...
Article
The manufacturing process of cement involves combustion of fossil fuels and calcination of limestone, resulting in emission of CO2 into the atmosphere. In recent years, blended cements with partial replacement of mineral additives have drawn significant attention with their ability to conserve the available natural resources and also to reduce the...
Article
Full-text available
One solution to the high cost and scarcity of building materials is to use alternative and sustainable materials. The study presented herein developed an eco-friendly masonry grout using high volumes of palm oil clinker powder to replace cement and palm oil clinker to replace coarse aggregate. Several batches of grouts with different amounts of the...
Article
In the recent decades, partial replacement of Ordinary Portland Cement (OPC) with pozzolanic materials gained more importance compared to plain OPC due to several advantages in terms of performance and sustainability. However, it is well known that the replacement of pozzolans in OPC, results in delayed strength particularly, at early ages due to s...
Article
Blended cements having partial replacement of fly ash (FA) and granulated blast furnace slag (GBFS) with Ordinary Portland Cement (OPC) have proven to be more sustainable cements with several ecological benefits, increased performance and durability aspects compared to plain OPC. In this study, three blended cements, namely Portland Pozzolana Cemen...
Article
Supplementary Cementitious Materials (SCMs) have become a part of cementitious composites in manufacturing of cements for improved performance and sustainability. Composite cement is one such type of cement wherein, OPC is partially replaced with fly ash and GBFS. In this study, the replacement levels of fly ash and GBFS are optimized to 20% and 30...
Article
Full-text available
Streszczenie Renowacja i konserwacja obiektów dziedzictwa kulturowego w każdym kraju jest zadaniem trudnym i czasami wymaga dużej uwagi. Jest to równocześnie ważne dla podtrzymania kultury i dzie-dzictwa społeczeństw. Jednak często bardzo trudno jest znaleźć odpowiednie materiały stosowane w przeszłości i dlatego w wyniku zastępowania ich dostępnym...
Chapter
In present day construction, utilisation of sustainable materials and technologies has become inevitable. One such idea is the use of recycled aggregate for rapidly depleting natural aggregates. Self Compacting Concrete (SCC) is normally used in problematic casting conditions where congestion of reinforcement is encountered. This is a technically a...
Article
Lime is a sustainable alternative to cement as it requires less energy for production and it absorbs CO2 in the atmosphere for strength gain through carbonation. Non-hydraulic lime-based mortars have low strength and this can be enhanced using pozzolanic additions. However, densifying sand using particle packing theories in mortars for strength enh...
Article
The unplanned and rapid growth of urbanisation and energy demand leads to environmental degradation, social inequalities, and economic instability. These global problems have forced society to rethink infrastructure development to evolve the concept of sustainable development in the construction industry. Technological advances have always been the...
Article
A Weigh in Motion (WIM) system is proposed, employing two fiber Bragg grating (FBG) sensors to evaluate the strain at a point on a prototype bridge due to a moving vehicle. The FBG's are fixed at two different longitudinal girders of bridge along the line of motion at different orientations. The parameters of investigation include strain developed...
Article
Concrete being one of the most extensively used material worldwide, the ecological influence of the manufacture of the raw materials for concrete is substantial. The scale of the problem makes it essential to examine other sources of raw materials to minimize the consumption of available natural resources. Since more than 70% of the bulk of convent...
Article
The construction sector is a resource-driven and resource-dependent industry. A rising global interest to incorporate sustainability principles in the policy-making means a careful balancing of economic growth with sustainability. To achieve this end in the Indian building sector, a triple-bottom-line-based building assessment tool like GRIHA and I...
Article
A low-cost real time load measurement system employing fiber Bragg grating as a strain sensor and long-period grating as an edge filter for structural health monitoring is being reported in the present work. The shift in Bragg wavelength due to applied load on a prototype bridge is converted to corresponding change in optical power using edge filte...
Article
Full-text available
Understanding the realistic behavior of concrete up to failure under different loading conditions within the framework of damage mechanics and plasticity would lead to an enhanced design of concrete structures. In the present investigation, QR (Quick Response) code based random speckle pattern is used as a non-contact sensor, which is an innovative...
Book
This book presents select proceedings of the National Conference on Advances in Sustainable Construction Materials (ASCM 2019) held at the National Institute of Technology, Warangal, India. The book includes contributions from academics and practitioners on low-energy cement technologies, innovative materials and structural technologies towards cos...
Article
With natural resources becoming scarce day by day, there is a need to find sustainable alternatives to raw materials for concrete. In the current study, use of Fine Reclaimed Asphalt Pavement (FRAP) as a substitute to natural fine aggregates (NFA) and effect of crimped steel fibers on the strength and durability of concrete is being studied. RAP, r...
Article
The paper discusses about the characterization of ancient mortar of an 800 year old heritage site in Southern India. The repair of heritage structures is largely neglected and even if attended, incompatible materials were used in the previous repairs. Hence, characterization of ancient mortar of heritage structure is an essential step before prepar...
Chapter
Cement industry consumes high energy producing emissions and waste to the environment. In order to reduce the effects (environmental impact, energy, and resources) caused by conventional materials, various by-products and pozzolanic materials are used to achieve sustainable concrete. Assessing the sustainable performance of concrete based on multip...
Chapter
With the newly formed Telangana State, there comes the responsibility to protect and maintain the culture and heritage of historic structures to attract tourism and to a broader aspect to be able to protect the heritage for the generations to come and maintain sustainability. It is important to renovate the heritage structures which are under the v...
Chapter
Aggregate industry consumes high energy and produces major emissions to the environment. In order to reduce the effects (environmental impact, energy, and resources) caused by conventional materials, various by-products, waste, and recycled materials are used to achieve sustainability in concrete. Assessing the concrete performance based on multipl...
Chapter
In concrete works, to obtain optimum packing density it is necessary to attain effective packing of solid particles. Concrete with best maximum packing density (PD) is preferred for construction works as it is strong, durable, and economical. Performance of concrete is affected by type and degree of packing of its constituents. Ideal proportion for...
Chapter
This study demonstrates the method to achieve energy savings in the construction of buildings by using LCA techniques for the selection of sustainable ingredients of concrete. The study integrates technological aspect with environmental, social, and economic aspects. In this study, the effects of various sustainable factors on sustainable criteria...
Article
The present study quantifies concrete deterioration due to chemical attack using a simple visible-spectrum based digital image processing technique. Concrete cubes of M30 grade were cast for durability based studies. Concrete specimens were exposed to deterioration due to acid (HCl, H2SO4) chloride (NaCl) and sulphate (MgSO4) at 5% concentration fo...
Article
Full-text available
A significant attention is drawn by researchers in recent years towards cements with partial replacements of supplementary cementitious materials [SCM], to reduce the adverse effect of global warming. The research presented in this paper involves the microstructure study of composite cement [CC] which falls into the category of ternary blended ceme...
Article
Full-text available
Selecting the best material among a pool of alternatives to achieve sustainability is a crucial exercise involving subjectivity. Choosing an alternative considering multiple conflicting criteria involved with multiple decision makers is Multi-Criteria Decision Making (MCDM) problem. The present study utilizes the concept of Shannon’s Entropy in eva...
Conference Paper
Considering common concerns and specific priorities of developing countries like India, the study has recognized and explored 8 criteria and 4 indicators in assessing sustainable building performance, and further extended to quantify the identified criteria based on the attributes and prerequisites. The objective of the present study is to assess t...
Article
Full-text available
There is a need to identify a well-defined set of sustainable performance indicators to advance and implement the concept of sustainable construction (SC) in developing countries. Sustainability aspects change with location, climate variations, local context, topographical, culture, and heritage. In the present investigation, the concept of quadra-...
Article
Full-text available
Selection of materials for construction plays a vital role in achieving sustainable construction. As such there are trade-offs between multiple indicators in evaluating performance and selecting suitable sustainable material. In this study, based on principles and concepts of sustainability relevant to the construction industry, the indicators whic...
Article
Full-text available
Sustainable construction became an integral part of reducing the impact on social, economic and environmental aspects in developed and developing countries. To achieve sustainability in construction, selection of material plays an important role. In the present work, a comprehensive review of sustainable indicators and criteria for evaluating const...
Article
Full-text available
Digital Image Correlation technique (DIC) is a non- contact optical method for rapid structural health monitoring of critical infrastructure. An innovative approach to DIC is presented using QR (Quick Response) code based random speckle pattern. Reinforced Cement Concrete (RCC) beams of size 1800 mm x150 mm x 200 mm are tested in flexure. DIC is us...
Article
Full-text available
The rapid building infrastructure development consumes natural/non-renewable resources, generate waste, and releases potentially hazardous emissions into atmosphere affecting the environment, social, economic, and technological aspects (sustainable indicators) throughout their whole life-cycle. This necessitates assessment of the degree of sustaina...
Conference Paper
Full-text available
The rapid building infrastructure development consumes natural/non-renewable resources, generate waste, and releases potentially hazardous emissions into atmosphere affecting the environment, social, economic, and technological aspects (sustainable indicators) throughout their whole life-cycle. This necessitates assessment of the degree of sustaina...
Article
The bond in reinforced concrete is responsible for the safe transfer of forces between reinforcement and the surrounding concrete ensuring strain compatibility and composite action. The bond stress under flexure i.e. bending is of importance to researchers as it resembles the actual state of stress in a structural member. Full scale beam tests were...
Article
Full-text available
Shear cracking behaviour of fibrous self-compacting concrete of normal and high strength grade (M30 and M70) is presented here. Two stirrup diameters (6mm ∅ and 8 mm ∅) with a constant steel fiber content of 38 kg/m ³ (0.5% by volume of concrete) were selected for the present study. The size of the beam was fixed at 100x200x1200mm. The clear span o...
Article
The use of recycled aggregate in concrete is gaining much attention due to the growing need for sustainability in construction. In the present study, Self Compacting Concrete (SCC) is made using both natural and recycled aggregate (crushed recycled concrete aggregate from building demolished waste) and performance of recycled aggregate based SCC fo...
Conference Paper
Full-text available
Fiber Bragg Grating (FBG) based Weigh-In-Motion system is proposed for the study of health condition of structures. Artificial damage is created in the system, and the results were compared with those of undamaged.
Article
This paper presents the experimental results of pull-out tests conducted to determine the bond characteristics of concrete using aggregates made from the recycling of concrete waste from demolished buildings. Factors such as water–cement ratio (0·5, 0·4 and 0·3), bar diameter (ø = 10, 12 and 16 mm), embedment length (2·5ø, 5ø and full depth of spec...
Article
The bond between steel reinforcing bars and concrete plays a vital role in the effective performance of reinforced concrete as a composite member. Failure of this bond can lead to catastrophic structural failure of buildings and infrastructure. Factors influencing the steel–concrete bond include concrete strength, bar properties such as embedment l...
Conference Paper
The effectiveness of reinforced concrete as a composite material lies in the bond between steel and concrete. The bond of steel to concrete depends on various factors like grade of concrete, diameter of bar, embedment length of bar, confinement of concrete, etc. An experimental program is designed to study the bond strength of high strength concret...
Article
The present work focuses on the use of coconut fiber in self compacting concrete. Self-Compacting Concrete (SCC) is a highly flowable, stable concrete which flows readily into place, filling formwork without any consolidation and without undergoing any significant segregation. Use of fibers in SCC bridge the cracks and enhance the performance of co...
Article
Full-text available
The present work focuses on the use of coconut fiber in self compacting concrete. Self-Compacting Concrete (SCC) is a highly flowable, stable concrete which flows readily into place, filling formwork without any consolidation and without undergoing any significant segregation. Use of fibers in SCC bridge the cracks and enhance the performance of co...
Conference Paper
The bond between concrete and reinforcement is very important to develop the composite behaviour of reinforced concrete. Bond strength is influenced by several factors such as bar diameter, embedment length of the bar, grade of concrete, age of concrete, cover to concrete, aggregates used in concrete, fiber addition, type of bars, and coating appli...
Conference Paper
One of the most important parameters in effective function of reinforced concrete as a two phase material is the bond between reinforcement and concrete. It is very much important to avoid the bond failure in concrete structures. The bond strength in RC members depends on the diameter of the bar, embedment length of the bar, grade of concrete and...
Article
Effectiveness of reinforced concrete as a composite element depends on the bond between reinforcing steel and encapsulating concrete. Bond plays an important role in the transfer of shear stress that develops along the steel-concrete interface upon loading. Failure of this transfer of stress will result in the failure of strain compatibility and co...
Article
Full-text available
Self Compacting Concrete has become synonymous with the construction industry due to the inherent advantages it possesses such as strength through durability, reasonable cost of ingredients, adoptability for all types of moulds, architectural construction with aesthetic sense, better fire resistance and weather resistance. Fiber Reinforced Self Com...
Conference Paper
Self Compacting Concrete (SCC) is a highly fluid yet stable concrete that can flow consistently under its own weight, pass between bars, and fill in formwork without the need for compaction resolving the difficulties of concreting in situations with complicated formwork and congested reinforcement. Composite action of any reinforced concrete member...
Article
Full-text available
This paper presents an analytical Moment-Curvature behaviour of statically determinate Glass Fiber Reinforced Self Compacting Recycled Aggregate Concrete (GFRSCRAC) beams, taking into consideration, the confinement offered by lateral ties to concrete in compression zone. A confinement model was developed based on the axial compressive strength stud...
Article
Concrete Block Pavements (CBP) are essentially precast blocks arranged in a specific pattern over a sub base and interlocked with graded bedding and jointing sand. The block size and shape, joint gap and joint filling sand size and laying pattern influence the effectiveness of the interlocking or the distribution of wheel loads. The measure of effe...
Article
Full-text available
This research work is aimed at investigating the flexural fatigue behavior of Steel Fiber Reinforced Recycled Aggregate Concrete (SFRRAC). This study gains importance in view of the wide potential for demolished concrete to serve as a source of quality aggregate feed stock in a variety of structural and non-structural applications. This is a contin...

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