MIT-World Peace University (MIT-WPU) is a top educational institute located in Pune, India. It is recognized within&nbsp;UGC under Government of Maharashtra Act No. XXXV 2017.&nbsp;

It is part of the MIT group of institutions (established in 1983) which covers 10+ campuses across India and has more than 50,000+ students enrolled across various disciplines at a given point of time. The institute houses 15 schools ranging from Engineering &amp; Technology, Design, Pharmacy, Commerce, Governance among others. It offers undergraduate, postgraduate and PhD programs among different disciplines.&nbsp;

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MIT World Peace University

In Delhi, according to CPCB, solid waste generation is predicted to be 43.5 million metric tonnes/year. In that, the waste generated from the construction industry is considered to be about 13.6 million metric tonnes. These solid waste materials formed by demolished structures are discarded by dumping them as landfills or disposal areas. Relinquish of this solid wastes is causing scarcity of disposal areas in urban areas. Hence, it's essential to start re-using and recycling waste demolition concrete to save lots of money, energy, and the environment. Employing recycled coarse aggregates assists in sustainable and economic growth through recycling. Durability parameters of Recycled Aggregate Concrete (RAC) are considered in this research to find out the optimum quantity of recycled aggregates which acts as a replacement for natural aggregates and finding out the mathematical equation by Analytical Modelling. Fly Ash here is employed as a replacement for cement without affecting its strength of concrete. This experimental investigation includes various durability tests viz. Water Absorption test (WAT), Abrasion Test, and Compressive strength. Recycled aggregate concrete of M50 and M60 grades with 0, 20, 40, and 60 % substitute of natural aggregate with recycled concrete aggregates along with 25% of cement is substituted by Fly Ash. The tests were executed at 28 days and 56 days of curing. From the above durability test, Mathematical modeling has to be found out to study concrete durability. Analysis and correlation were done by MLR (Multiple Linear Regression). The equations are formed of all three tests with their regression graph. So this research assists in the use of recycled aggregate concrete in the construction sector.

World University root node

School of Civil Engineering

Engineering and Technology

GIS Science Journal

DURABILITY STUDY OF RECYCLED AGGREGATE CONCRETE WITH PARTIAL REPLACEMENT OF CEMENT BY FLY ASH

According to the building material promotion council (BMPTC) India generates 150 million tons of construction and demolition waste per year. From this demolition waste, we can recycle the concrete aggregates replacing natural coarse aggregate to make it more sustainable. This experimental research aims to study the rheological behavior of M50 and M60 grade concrete. The replacement of NCA with RCA in this study was 0%, 20%, 40%, and 60% along with the cement replacement of 25% by fly ash. The polycarbonate (PC) based superplasticizer was used for the concrete. The tests performed to study the rheology of concrete were slump test, Vee-Bee test, compaction factor test &amp; flow table test. The mathematical equation is been formulated showing the interrelation between the results found in the above tests. The promising results will reduce the cost of concrete on-site significantly and the mathematical equation formulated will help for on-site calculations of the quantity of recycled concrete aggregate for the expected rheological behavior of concrete.

RHEOLOGY OF RECYCLED AGGREGATE CONCRETE

Rheology helps to define the fresh concrete properties as required by specific applications and the concrete design can be prepared as required. This research includes the study of rheological parameters of high-strength recycled concrete mixes of grade M50 and M60. The concrete mix is made by replacing certain percentages of natural coarse aggregates (NCA) with recycled coarse aggregates (RCA). Four concrete mixes were studied by varying proportions of RCA as 0%, 20%, 40%, and 60% each of grade M50 and grade M60. The empirical tests like the ‘slump cone test’ performed on concrete mixes to determine the workability mostly give only one-point results; often these tests are operator sensitive which is why a more quantitative estimate can be derived from fundamental physical quantities such as plastic viscosity and yield stress. The rheological parameters give more accurate and independent values which define workability according to the functions where it is to be used. Various workability tests like the Slump Cone test, Flow Table test, Vee Bee test, and Compaction Factor test was carried on concrete mixes with the above-mentioned proportions of varying RCA and the results of tests are simulated to form equations of rheological parameters. The analysis and correlation of the four tests were done with the Multiple Linear Regression (MLR). The equations relating the yield stress and plastic viscosity of concrete with the empirical test were obtained for the literature and the graph obtained by these equations are plotted against the rheological parameters and the trendline showing its deviation is obtained. The percentage changes in the values obtained from the equations and the experimental results are also presented.

Journal of Engineering Sciences

Rheology of Recycled Coarse Aggregate Concrete

The worldwide usage of retaining wall has stimulated a research for appropriate, easy, fast and cost-effective new ways of wall construction. Mortarless technology using interlocking bricks is very promising among many technologies. This can only be achieved with the concept and implementation of sustainability of wall towards the pressure exerted by soil. The study done and shown in this paper is one such paradigm towards sustainability of wall. The study in this paper is done on the design concept, modeling of interlocking structural block, using it as a retaining wall. The strength parameters of these walls are checked by ansys software. These blocks can easily transferred from one place to another. This report is about such interlocking walling technology and in particular: how to improve speed of wall-construction, the effects of brick design on wall alignment accuracy and wall behavior (principle stress, deformation) when subject to lateral forces. This research paper consist of an analytical study of a retaining wall made up of the interlocking precast structural blocks in ansys software. In this paper the design of the brick is been prepared by keeping into consideration various interlocking patterns and their strengths. Retaining wall of these designed interlocking brick is been constructed using ansys software. Various heights of this retaining wall is been considered (ie 2m, 3m,4m). In order to perform the analysis of this wall, two cases are considered. 1) All sides are fixed. 2) Only bottom is fixed. The retaining wall is been designed on the basis of earth pressure exerted on it. This earth pressure further depends upon various conditions. Hence both the cases are divided into five parts. I) Dry leveled back fill. II) Two layred leveled backfill. III) Submerged leveled backfill. IV) Leveled backfill with uniform surcharge. V) Backfill with inclined surface. All these cases are further analyzed by the ansys software

Journal of Engineering Sciences (JES)

Analysis and Design of Structural Precast Interlocking Blocks for Retaining Wall

The problem of web document clustering has been well studied. Web documents has been grouped based various features like textual, topical and semantic features. Number of approaches has been discussed earlier for the clustering of web documents. However the method does not produce promising results towards web document clustering. To overcome this, an efficient hierarchical semantic relational coverage based approach is presented in this paper. The method extracts the features of web document by preprocessing the document. The features extracted have been used to measure the semantic relational coverage measure in different levels. As the documents are grouped in a hierarchical manner, the method estimates the relational coverage measure in each level of the cluster. Based on the semantic relational measure at different level, the method estimates the topical semantic support measure. Using these two, the method computes the class weight. The estimated class weight has been used to perform document clustering. The proposed method improves the performance of document clustering and reduces the false classification ratio.

International Journal of Innovative Technology and Exploring Engineering

Achieve High Compressive Strength and durability of Concrete Made from Recycled Concrete Aggregate

Conventional bricks are produced from clay whereas fly ash bricks make use of fly ash, sand and cement.Due to rising demand the quarrying operation for sand and clay has increased. Also the need for cement has increased which has led to high emission of CO2 gas and its high prices. In this study saw dust, sugar bagasse ash, saw dust ash and rice husk ash has been used as a partial replacement for cement whereas rubber tyre, thermocol, cocopeat, plastic powder and coconut shell ash has been used as a replacement for sand. Engineering property such as compressive strength has been studied at 14 days. From the study, it has been observed that sugar bagasse ash and saw dust ash can be used for partial replacement of cement and rubber tyre, plastic powder and coconut shell ash can be used as a replacement for sand. In the entire study there has been no use of clay as well as sand whereas an optimum quantity of cement has been used.

Journal of Emerging Technologies and Innovative Research

An Investigational Study on Use of Waste Materials In Eco-Friendly Fly Ash Bricks

In this research the strength and durability parameters of recycled aggregates are studied to determine the optimum quantity of recycled aggregates that can be used as substitute for natural aggregates without affecting the strength of concrete. Compression test, Water penetration Test and Rapid Chloride penetration test were conducted on specimens of Grade M40, M50 and M60 with 0, 40, 60 and 80 % of replaced aggregates. For compression test the cube was cured for 28, 56 and 90 days, and for durability test (Water penetration Test and Rapid Chloride penetration test) cube was cured for 28 days. The result is obtained and compared with that of natural coarse aggregate. It is found that use of recycled aggregates does not decrease the strength of concrete substantially.

International Journal of Science Technology & Engineering

Strength & Durability Parameter of Recycled Concrete Aggregate

According to eleventh five year plan, Construction industry is the second largest economic activity after agriculture. The impact caused to the environment by Indian construction industry is tremendous. Construction industry consumes high volume of raw materials and products. Building materials accounts of about almost half of overall material used as well as solid waste generated. This has major impact on environment starting from extraction of raw material to disposal at the end of structure’s life span. By considering latest scenario, where we have to concentrate more on environmental issues, construction and demolition (C&D) can be considered as a major recoverable material in life cycle process of structure. According to current figures in India out of 48 MT of total solid waste generated per annum (C&D) Waste is about 14.5 MT. According to few studies, out of all C&D) Waste almost 65% is waste concrete. So this waste concrete can be used as a better alternative for aggregate. This paper enlightens the importance of managing the construction waste by reusing it as a better substitute for aggregate in construction which will be one of the best approach to reduce burden of solid waste management as well as curtailing cost of construction.