DSpace Repository :: Browsing by Author "Patil, Dada S."

Browsing by Author "Patil, Dada S."

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As Engineering Teachers, Do We Resemble A T20 Cricket Batsman or A Test Cricket Batsman?: Let Us Introspect
(International Research Journal of Engineering and Technology (IRJET), 2024-10) Patil, Dada S.
The title might puzzle the readers. The author positively hopes that the work carried out and the content presented in this paper with reference to an effective teachinglearning process, in general and teaching-learning mechanism in engineering education, in particular would probably convince the readers about the appropriateness and relevance of this unusual sounding title. The so called smart engineering students of Generation Z are habituated to shortcut and mechanical way of learning rather than in-depth and conceptual learning; so, they tend to pursue the teacher for a quick way of teaching. Hence, the attainment of various learning levels, as depicted in Bloom’s taxonomy, in a true sense, remains an ambiguous issue. The author shared his short video with the second year civil engineering students to carry out an interesting exercise through Google form survey. The video contained a demonstration of calculation of two support reactions of a simply supported beam, from first year engineering mechanics course. Intentionally, the problem was demonstrated in a highly mechanical way through the video, without explaining the concepts at depth. A Google form containing 8 questions was circulated among the students. In all, 46 students responded. The first question was exactly similar to the problem demonstrated in the video. It was correctly answered by 30 students, thereby making the passing rate as 65.2%. Questions 2 to 8 were related to the first question; however, critical thinking and conceptual teaching was needed to answer those. Most of the students performed poorly while attempting those questions. This clearly underlined a dire need of imparting strong fundamentals to the learners by an engineering teacher. Along with discussing the significance of various modern tools and techniques for an efficient teaching-learning mechanism, this paper mainly stresses upon the need of conceptual teaching. Key Words: Bloom’s taxonomy, teaching-learning, conceptual teaching, modern tools and techniques of teaching, e-learning, Google form survey, etc.
Assessment of Feasibility of Sintered Fly Ash Lightweight Aggregate as an Effective Self-Curing Additive for Sustainable Concreting Practice
(E3S Web of Conferences, 2024-11-22) Patil, Dada S.; Nadaf, Firoz; Parkar, Fauwaz
Effective curing is an essential requirement for a desired long-term performance of concrete. For 1 cubic metre of hardened concrete, 3 cubic metre of water is required; most of which is consumed for curing, thereby leading to an unsustainable practice. Limited depth of water penetration occurs in conventional method of external curing. Self-Curing (SCu), also known as Internal Curing facilitates uniform moisture distribution throughout the concrete. Moreover, enormous amount of curing water can be saved for a sustainable development. This is achieved by incorporating prewetted porous lightweight aggregates (LWAs); water held in LWA pores is gradually desorbed in to surrounding matrix over a period of time for an effective Self-Curing by maintaining sufficient moisture inside the concrete mass. Different types of LWAs are used for this purpose. The available literature indicates that sintered fly ash LWAs are used to produce non-structural and structural lightweight concrete; but their utilization for internal curing is not found. In this experimental work, feasibility of 4 to 8 mm spherical sintered fly ash LWA to act as an effective Self-Curing agent was assessed through various tests. Scanning Electron Microscopy revealed that LWAs were porous enough to hold sufficient amount of water. Higher specific gravity as compared to that of other types of LWAs made it desirable material from strength and density point of view. Higher water absorption rate within initial 30 minutes reflected it’s better desorption behaviour; highly desirable for an effective internal curing. Oven-dried LWAs were immersed in blue ink for 24 hours and then placed in a white cement paste. The thick blue ink corona around LWA confirmed about better desorption. This is not true of every type of LWA. Cement-sand mortar cubes were cast by volumetrically replacing sand by 10%, 15% and 20% prewetted LWAs for compressive strength tests at 3, 7 and 28 days. Prewetting was done for 24 hours and 72 hours. Conventional mortar cubes were placed under water; prewetted LWA-incorporated specimens were placed inside laboratory in an open air and directly under the sun. Conventional specimens exhibited highest strength values. Among Self-Curing specimens, 15% LWA cubes indicated maximum compressive strength; marginally less than that of water- cured cubes. 72-hour prewetted LWA cubes resulted in higher strengths as compared to that of 24 hour prewetted LWA cubes. Ultrasonic Pulse Velocity values for all the specimens were between 3.16 to 3.68 km/sec. The experimental results indicated that sintered fly ash LWA can be used as a potential material to produce Self-Curing concrete. Key words: Self-Curing / desorption / sintered fly ash LWAs / mortar cubes / sustainable practice / water absorption / sufficient moisture / open air / sun / etc
Comparison between destructive and non-destructive test parameters for M30 and M40 grade concrete
(AIKTC, 2021-05) Patil, Dada S.; Shaikh, Sohail Asif (17CE57); Shaikh, Anwarul Haq (17CE51); Shah, Rizwan (17CE49); Shaikh, Umar (17CE56)
The estimation of mechanical properties of concrete can be carried out by several methods; destructive and non-destructive. We will be doing the crushing of the samples that is the usual destructive test to determine the compressive strength.
Computation of Static Modulus of Elasticity and Poisson's Ratio of M20 Grade Self-Curing Concrete with PEG-400 as a Self Curing Agent Using IS Code and ASTM Standard
(SSRN, 2020-10) Patil, Dada S.; Anadinni, Shrishail B.
The concrete does not attain its original shape after unloading as it is not an elastic material. It is a non-linear material as depicted by its stress-strain curve. Hence, the elastic constants like modulus and Poisson’s ratio are not strictly applicable to such a complex, heterogeneous and nonlinear construction material. However, an elastic behaviour is assumed for the analysis and design of concrete structures by making use of these constants. The modulus of elasticity of concrete is its inherent property of undergoing an elastic deformation. Higher value of modulus leads to an enhanced stiffness of the structural elements. Curing is one of the important parameters influencing the modulus value. Curing caters to maintaining the required temperature, preventing water loss and shrinkage associated with it. The Shrinkage Reducing Admixture (SRA) in the form of Polyethylene Glycol 400 (PEG 400) liquid, added as a self-curing agent, plays an important role of reducing the water evaporation from the concrete mass, resulting into an improved water retention capacity of the concrete. PEG 400 is hydrophilic in nature. It plays a dual role of controlling evaporation and attracting moisture from the atmosphere. Self-curing leads to uninterrupted and effective curing by retaining the required quantity of water for an adequate cement hydration and maintaining the high relative humidity (RH), thereby resulting in to hard and dense concrete, with reduced thermal and shrinkage cracks. To provide a practical solution for the nonavailability of better quality water or lack of proper curing due to negligence, producing a self-curing concrete is a sustainable option. Generally, self-curing is advocated for the High Strength Concrete (HSC) having low water-cement ratio (w/c), because of chemical shrinkage associated with Portland cement hydration and low permeability of these materials. Moreover, it is an effective way to reduce the self-desiccation, autogenous shrinkage, plastic shrinkage cracking, drying shrinkage cracking and water absorption. Though the structural elements like Reinforced Cement Concrete (RCC) slabs are cast using lower grade concrete like M20, generally with higher w/c ratio, they are directly exposed to the harsh environment while concreting and a considerable period after concreting. To add to this, many times, the curing is not sufficient on the construction site. This leads to the undesirable situation of concrete properties not getting developed to their full potential values; the vital parameters being strength and modulus. Modulus of elasticity of concrete is known to be a function of its compressive strength. Development of required modulus of elasticity, for a structural element with a particular concrete grade, makes it adequately stiff thereby satisfying the limit state of serviceability for deflection. Excessive deflection of any structural element is highly undesirable phenomenon; moreover, it is well established fact in RCC theory that the slab depth is governed by the deflection criterion. This paper discusses an experimental investigation of short term static modulus of elasticity and Poisson’s ratio of M20 grade of self curing concrete using PEG 400 as a self curing agent. Three different dosages of 1%, 1.5% and 2% of PEG 400, expressed as percentage of weight of cement, were used. The conventional cylindrical specimens were subjected to water curing for 28 days, whereas self cured cylinders were exposed to air curing in an open shaded area for 28 days. Indian Standard: IS 516- 1959 and American Society for Testing and Materials (ASTM) standard: C469/C469M-2014 were followed for testing conventional as well as self cured specimens. The laboratory investigation was aimed at comparing the values of the two elastic constants obtained for the self cured concrete with that for the conventional mix, by both the methods. Though conventional concrete had highest values of density and compressive strength, it was observed that concrete with 1.5% PEG 400 exhibited greatest values of modulus of elasticity, by both the methods. Dosages of 1.5% and 2% of PEG 400 resulted in to higher values of Poisson’s ratio in comparison with that for conventional mix and 1% PEG 400 mix. Keywords: PEG 400, self-curing concrete, short term static modulus of elasticity, Poisson’s ratio, chord modulus, concrete density, stiffness, porosity.
Concrete Mix Design for M35 Grade: Comparison of Indian Standard Codes, IS 10262: 2009 & IS 456:2000 with American Code, ACI 211.1-91
(International Research Journal of Engineering and Technology (IRJET), 2019-02) Patil, Dada S.
A rational & logical Concrete Mix Design to cater to the practical requirements plays a key role in concrete engineering. It is well established fact that the concrete is highly consumed material throughout the world. With the exponentially high demand of infrastructure facilities, the concrete requirement is on a very huge scale. Therefore, using the optimum quantities of concrete making constituent materials is of utmost importance in order to achieve the desired fresh & hardened properties. Owing to an enormous utilization of concrete in day- to-day construction work, economy is a vital factor to be considered. In India, mix design is carried out by following the rules prescribed in IS 10262: 2009 & IS 456:2000. As a well known fact, every country has its own codes to design a concrete mix. In this paper, an attempt has been made to compare the Concrete Mix Design of M35 grade by the American Code; ACI 211.1-91 with Indian codes IS 10262: 2009 & IS 456:2000. The outcomes are critically reviewed & the comments are given. Keywords: OPC, (w/c) ratio, nominal maximum size of aggregate, workability, slump, target mean strength, etc.
Design and cost economic analysis of self compacting concrete for mivan shuttering
(International Journal of Engineering Development and Research, 2016) Syed, Mehdi Abbas (14CEM16); Magar, Rajendra; Patil, Dada S.
This paper summarizes the experimental work performed to design a self-compacting concrete for Mivan shuttering and cost analysis of cost of the designed per m3 mineral and chemical admixtures. Workability tests such as Flow table test, V funnel test and U box tests were conducted. Compressive Strength test was performed out on hardened 150mm concrete cubes after 3, 7, & 28 days curing in water. The output of the research work was a highly workable concrete which could be used for densely reinforced sections of Mivan shuttering.
Domain knowledge, adequate software skills and physical model making: A dire necessity for the undergraduate learners for an outcome based teaching-learning process in structural engineering
(K.K Wagh Institute Of Engineering Education and Research (KKWIEER), Nashik, 8th and 9th June, 2019) Patil, Dada S.; Magar, Rajendra
Enhancing Bloom's learning levels for an outcome based teaching-learning process in geotechnical engineering: A case study of failed boiler house
(K.K Wagh Institute Of Engineering Education and Research (KKWIEER), Nashik, 2019) Patil, Dada S.
Enhancing the outcome based teaching-learning process through laboratory session to impart critical thinking to the learners: Demonstrating of conflicting results of various concrete workability tests
(K.K Wagh Institute Of Engineering Education and Research (KKWIEER), Nashik, 2019-06-08 ) Patil, Dada S.; Honnutagi, Abdul Razak
An effective teaching-learning process plays a vital and significant role owing to the fact that it has major contribution to improve the quality of education. The process needs to be dynamic, scientific, logical and outcome based in Engineering Education. The learning domains are broadly classified as cognitive domain (knowledge), psychomotor domain (skills) and affective domain (attitudes). Bloom's Taxonomy of learning levels, introduced in 1956 and revised in 2001caters to the classification of educational goals, objectives and standards. Moreover, it is pragmatically close to the cognitive domain. The Bloom‘s Taxonomy presents the ascending orders of learning as Remembering, Understanding, Applying, Analyzing, Evaluating and Creating. It is well established fact that, unlike certain Engineering Programs wherein the learners have to constantly deal with the soft wares, circuits, etc. in the laboratory, Civil Engineering Program comprises of bulky laboratories to cater to the material testing. Concrete Technology Laboratory is one among those. Workability of fresh concrete is one of the important parameters, defined as the ease with which the concrete can be worked and molded; the comfort and convenience with which it can be placed and compacted adequately. There are various tests for arriving at workability value of a fresh concrete. While dealing with Concrete Technology course during Second Year, the undergraduate Civil Engineering learners undergo theoretical concepts in connection with these workability tests and subsequently carry out laboratory tests as per the guidelines laid down in the relevant standard codes of their respective countries. The learners carry out each test of workability mentioned in their curriculum, separately. As a usual practice, they present their results and comments to the instructor. The combined effect of theoretical concepts learnt and laboratory experiments conducted in order to merely cope up with the curriculum requirements is that the learners confine themselves to the low learning levels of Blooms Taxonomy like Remembering, Understanding and to some extent, Applying. Moreover, learners get accustomed to concept. For a field expert or an experienced academician, such an exercise may seem meager. But, from learners‘ perspective, it adds a value through a bit of research component associated with it. The paper does not intend to explain the procedure of workability tests. It is directed towards directly using the workability test results to connect it to the enhancement of learning level and contribution towards improved outcome based teachinglearning process.
Experimental investigation of pervious concrete using fly ash and nano silica
(AIKTC, 2020-05) Patil, Dada S.; Sarzeel, Hussain (16CE28); Pal, Rajesh (16CE30); Shaikh, Basit (16CE40); Shaikh, Hamza (16DCE83)
Pervious concrete (no fines concrete) is a concrete containing little or no fine aggregate; it consists of coarse aggregate and cement paste. It seems pervious concrete would be a natural choice for use in structural applications in this age of green building. It consumes less raw materials than normal concrete (no sand), it provides superior insulation values when used in walls, and through the direct drainage of rainwater, it helps recharge groundwater in pavement applications. The first pervious concrete was used in Europe and the united kingdom since 1930s for the building of single and multi storeyed houses, but had found little acceptance in rest of the world. Even though it is not yet widely used, pervious concrete is generally used for light duty applications, such as residential streets, parking lots, driveways, sidewalks, channel lining, retaining walls and sound walls. The aim of this study is to investigate compressive strength of pervious concrete by eliminating the fine aggregate; additionally investigate infiltration rate of pervious concrete. Referring to the available literature, it was attempted to mix cement & coarse aggregates at two different water-cement ratios. As the pervious concrete finds its wide application in parking areas, footpaths, garden paving, etc., higher compressive strength was not an objective. The focus of the current work was on providing adequate permeability to the concrete mass so that the water can easily pass through it. The slump required for the pavement work is exceptionally low. Therefore, production of zero slump concrete was aimed at. The wide use of the pervious concrete for the various applications mentioned above is the need of the hour. The water infiltrated through the pervious concrete would also contribute towards enhancing the ground water level i.e. it would facilitate ground water recharge.
Experimental investigation on characteristic properties of light weight concrete
(AIKTC, 2020-05) Patil, Dada S.; Dhanwanti, Baikar (16CE02); Shetty, Vishwajeet (16CE44); Siddique, Zakir (16CE45); Malve, Akash (17DCE58)
Light weight concrete is a relatively new concept. This concrete can be used for heat insulation on roofs, construction of panel walls and partition walls in framed structures ,casting structural steel to protect it against fire and corrosion , as covering for architectural purposes , surface rendered for external walls of small houses etc. Aggregates provide volume at low cost , comprising of 66 to 78 percentage of entire concrete. With increasing concern for the over exploitation of the natural aggregates hence the environment, the waste materials obtained from different industries and agricultural activities also household activities which are identified to be potential aggregates are a new source of obtaining building materials for construction industry. This experimental investigation was carried out to determine whether coconut shells can be used as aggregates in concrete . Utilising coconut shells as aggregate in concrete not only solves the problem of solid waste management and disposal but also helps in reducing the tremendous pressure on the environment due to ever increasing demand of aggregates. This study shows a comparison between conventional concrete properties and the concrete prepared by using coconut shells as light weight aggregates. Tests results which were compared are slump cone test, compressive strength test and split tensile test. Test age for concrete elements was kept 7days, 21 days and 28 days respectively.
Experimental investigation on pervious concrete
(AIKTC, 2019-05) Patil, Dada S.; Suryawanshi, Akshay Pradeep (13CES59); Khan, Ali Mohd. Mateen (15DCES70); Ansari, Tausif Ahmed Maqbool [15DCES60); Parab, Siddesh Deepak (14CES34)
Pervious concrete (no fines concrete) is a concrete containing little or no fine aggregate; it consists of coarse aggregate and cement paste. It seems pervious concrete would be a natural choice for use in structural applications in this age of green building. It consumes less raw materials than normal concrete (no sand), it provides superior insulation values when used in walls, and through the direct drainage of rainwater, it helps recharge groundwater in pavement applications. The first pervious concrete was used in Europe and the united kingdom since 1930s for the building of single and multi storeyed houses, but had found little acceptance in rest of the world. Even though it is not yet widely used, pervious concrete is generally used for light duty applications, such as residential streets, parking lots, driveways, sidewalks, channel lining, retaining walls and sound walls. The aim of this study is to investigate compressive strength of pervious concrete by eliminating the fine aggregate; additionally investigate infiltration rate of pervious concrete. Referring to the available literature, it was attempted to mix cement & coarse aggregates at two different water-cement ratios. As the pervious concrete finds its wide application in parking areas, footpaths, garden paving, etc., higher compressive strength was not an objective. The focus of the current work was on providing adequate permeability to the concrete mass so that the water can easily pass through it. The slump required for the pavement work is exceptionally low. Therefore, production of zero slump concrete was aimed at. The wide use of the pervious concrete for the various applications mentioned above is the need of the hour. The water infiltrated through the pervious concrete would also contribute towards enhancing the ground water level i. e. it would facilitate ground water recharge.
Experimental investigtion on characteristic properties of previous concrete
(AIKTC, 2018-05) Patil, Dada S.; Mujawar, Ayub(12CE43); Shaikh, Mohd. Siddique(12CE57); Siddiqui, Mohd. Iqbal(12CE59); Singh, Nitesh Kumar(12CE61)
Pervious concrete is a relatively new concept. This concrete can be used for the rural road pavement, with relatively less traffic. As the concrete allows the water to pass through it, this would greatly help in recharging the ground water level. This has multifaceted benefits, including that for agriculture. Pervious concrete can be introduced in rural areas as a road pavement material. Pervious concrete as a paving material has seen renewed interest due to its ability to allow water to flow through itself to recharge groundwater level and minimize storm water runoff. In rural areas, cost consideration is the primary factor which must be kept in mind. In rural areas, storm water management practice is costly. Pervious concrete pavement is unique and effective means to meet growing environmental demands. In cities also, the pervious concrete pavements can be used for parking areas, garden, etc. It can be advantageously used as a replacement for the paver blocks. By capturing rainwater and allowing it to seep into the ground, this pavement technology creates more efficient land use by eliminating the need for retention ponds, well and other costly storm water management devices. However, the need for pervious concrete is of low grade, as there will not be heavy loads in parking area, garden, etc. In this project work, an attempt has been made to develop a low grade pervious concrete in the laboratory. The conventional concrete making materials are used for the same. However, the fine aggregates (sand) are not used. Only 10 mm coarse aggregates & 20 mm coarse aggregates are used. The proportion of concrete is 1 cement: 4 aggregates. Due to absence of fine aggregates, the concrete becomes porous in nature. This, in turn, allows the water to pass through it. The strength tests, workability tests & permeability tests are done on concrete to assess its properties & its suitability for the intended purpose.
Experimental invetifation on cohesion and angle of internal friction of crushed sand partially replaced with self-curing additive sintered fly ash lightweight aggregates
(UKIERI Concrete Congress, 2023-03) Patil, Dada S.; Anadinni, Shrishail B.; Shivapur, Anand V. ; Koppa, Nagraj
Experimental study of soil stabilization by using cement, lime and Potassium hydroxide
(AIKTC, 2018-05) Patil, Dada S.; KHAN, ZISHAN MAHTAB ALAM (14CES24); JAMADAR, TALHA ZAHID (15DCES67); KAZI, MOHD ISMAIL ZAKI (15DCES69); MULLA, ABDULLATIF JABBAR (15DCES78)
The use of soil stabilization is ever increasing due to technical, economic and environmental benefits. Soil stabilization methods are commonly used in highway projects where high strength of sub-soil is required. In physical and chemical stabilization, an optimum amount of cement, lime or any chemical is mixed with the soil to improve its quality. A practical and generally accepted approach is used to determine the optimum amount of additive to be added to the soil to get the maximum efficiency. In this work, an attempt has been made to carry out an experimental work, based on various results with different amount of additives ranging from 4%, 8% and 12%. The additives used are cement, lime and Potassium Hydroxide (KOH). Different properties of soil are determined for the campus soil. The important soil parameters are determined by incorporating different percentages of cement, (cement + lime) and (cement + lime +KOH). The results obtained can be utilized as a guide, as to what percentage and combination of additives is to be added in the soil when a particular soil property needs to be enhanced.
Ferrocement Water Tanks: A Cost-Effective & Durable Solution for India
(NBM&CW, 2024-07) Patil, Dada S.
This article explores the advantages of ferrocement water tanks compared to traditional Reinforced Concrete (RCC) tanks. It delves into the construction process, material requirements, and cost-saving benefits of ferrocement technology...
Implications of Aggregate Geological Origin for RCC Design Under Indian Standard 456:2025
(NBM&CW, 2026-05) Patil, Dada S.
The inclusion of aggregate geological origin in elastic modulus estimation under draft IS 456:2025 marks a significant shift in RCC design approach. Dr. Dada S. Patil, examines how this move from strength-based to a more material-sensitive approach could influence structural behaviour, serviceability predictions, and overall design accuracy, and highlights the technical, practical, coordination, and contractual challenges in aligning design assumptions with on-site conditions.
Investigation on the characteristic properties of high performance SCC with mineral admixtures
(Indian Concrete Journal, 2009-09) Patil, Dada S.
In this experimental work, a mix design for self-compacting concrete has been carried out using Nan-Su method. Flow properties such as passing ability, filling ability, and segregation resistance were evaluated by varing the dosage of super plasticier (HRWRA) and viscoity modifing admixture.
Invisible Problem of Poor Compaction in Real Structures
(NBM&CW, 2025-12) Patil, Dada S.; Mujawar, Shafi
This study highlights the hidden risks of poor concrete compaction, showing how inadequate vibration increases porosity, lowers strength, and leads to misleading cube test results. The laboratory fin
Light weight translucent concrete
(AIKTC, 2020-05) Patil, Dada S.; Khan, Mohd. Aftab (13CE26); Khan, Atahar (14CE22); Malik, Fahad (14CE38); Ansari, Azra Banu (16CE01)
Light Weight Translucent concrete is an upcoming innovation in construction engineering. Translucent concrete allows light to pass through it, with the presence of optical fibers embedded in the concrete. The principal objective of this project is to design the light weight translucent concrete blocks with the use of plastic optical fibers, fly ash powder and waste polystyrene (thermocol) to generate form of cement mortar. Compressive strength test and light transmitting test were conducted on concrete block to ascertain the practical utility of using translucent concrete. The project provides a new alternative to entrench the concept of sustainability and translucent concrete can be regarded as a green energy saving construction material. High emphasis is given to find out best ultimate possible solution of casting cubes with varying percentage of EPS as well as by the percentage of fly ash used in each trial. The output of project helps us in giving satisfying results so that use of these light weight translucent concrete can be bought into actual practice. Keywords: Translucent concrete, lightweight, polystyrene and fly-ash.

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