Faculty Publications

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Author: search.filters.author.Venkat Reddy, D.V.

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    Slope stability studies of excavated slopes in lateritic formations
    (Springer, 2019) Shivashankar, R.; Thomas, B.C.; Krishnanunni, K.T.; Venkat Reddy, D.V.
    The study area for this paper is coastal Karnataka in India, which has laterites and lateritic soils. The soil stratification in this area mainly consists of lithomargic clay, which is a product of laterization, sandwiched between the hard and porous weathered laterite crust at the top and the hard granite or granitic gneiss underneath. This lithomargic clay, locally called as ‘shedi soil’ behaves as dispersive soil and is also highly erosive. In the first stage of this study, laboratory erosion studies are conducted by using the hole erosion test apparatus on controlled shedi soil samples. Erosion observed in the HET is accelerated due to slaking irrespective of dispersive nature of the soil. Erosion problems were also dealt with using a stabilizer, calcium lignosulfonate and resulted in high increase in its erosion resistance. In the second stage of this study, slope stability studies of excavated slopes in lateritic formations are conducted considering intensity of rainfall, ponding and seepage, apart from the usual geotechnical parameters. The slopes steeper than 60° are not stable in the case of shedi soil considered here. © Springer Nature Singapore Pte Ltd 2019.
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    Rockfall assessment at Pyramid of Khafre, Giza, Cairo, Egypt
    (CAFET INNOVA Technical Society cafetinnova@gmail.com 1-2-18/103, Mohini Mansion, Gagan Mahal Road, Domalguda, Hyderabad 500029, 2014) Ansari, M.K.; Ahmad, M.; Singh, T.N.; Venkat Reddy, D.V.
    Rockfalls are frequently phenomenon in hilly regions and threatened manmade surroundings as well as loss of human life and property too. Sometime the rockfall also has impact on archeological sites and historical monuments. Therefore, the detachment of large size boulders and their fall track are issues that should be estimated for the safety of the tourist and the historical site. In order to achieve this, several methodologies had been proposed and applied, regarding the evaluation of the rockfall hazard. This paper presents the instability of rock blocks forming the Pyramid at Giza in Egypt. The instability of the blocks possesses a major risk to the tourist as well as the structure of the Pyramid of Khafre. Rockfall phenomena happened in the past that can be identified with the help of rock blocks lying at the base of the pyramid of Khafre due to loosening of the rock blocks. In order to investigate the existing stability conditions and decide upon the protection measures, rockfall analysis was carried out for Pyramid of Khafre. © 2014 CAFET-INNOVA TECHNICAL SOCIETY.
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    Sustainable approaches for utilizing waste in building construction: Two case studies in India
    (CAFET INNOVA Technical Society cafetinnova@gmail.com 1-2-18/103, Mohini Mansion, Gagan Mahal Road, Domalguda, Hyderabad 500029, 2014) Kasthurba, A.K.; Reddy, K.R.; Venkat Reddy, D.V.
    Problems associated with increasing waste due to rising urban developments and its environmental concerns are reviewed. The challenges and standards for sustainable construction are outlined. This study explores potential utilization of different types of waste materials in building construction for its efficient and sustainable management. The benefits and challenges in utilization of waste for building applications are reviewed. Two case studies which demonstrate effective utilization of waste in construction projects carried out in India are outlined. These sustainable approaches of managing waste in building construction shall help private and governmental agencies to incorporate effective waste management strategies in future. This study will offer a background and useful guide for engineers and material scientists to develop standards and specifications for cost effective alternate building materials and techniques for economy, energy, and environmental benefits. © 2014 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.
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    Selection criteria for decorative dimension stones
    (CAFET INNOVA Technical Society cafetinnova@gmail.com 1-2-18/103, Mohini Mansion, Gagan Mahal Road, Domalguda, Hyderabad 500029, 2014) Manjunatha, B.R.; Venkat Reddy, D.V.; Krishnakumar, K.N.; Balakrishna, K.; Manjunatha, H.V.; Gurumurthy, G.P.
    Selection of decorative dimension stones suitable for exterior and interior decorations is one of the challenging tasks for geologists, architectural, structural and civil engineers. Therefore, understanding the knowledge of general properties of commercial grade rocks and their quality assessment are at most important before selecting stones for construction. In many instances, decorative dimension stones are usually preferred on the basis proximity. In such cases, the colour and textural characteristics may not only be suitable, but also weather out faster. In some instances, specific design may not suits the structure due to masking colour and other inherent defects. One of the secrets behind the success of commercial stone industry is the production of defect-free decorative dimension stone blocks. Generally, not all rocks available in the earth’s crust are suitable for architectural and civil engineering construction purposes. In this study, the main criteria for the selection of commercial grade decorative dimension rocks will be discussed along with their trade names. Sometimes, trade names of rocks confuse with generic names. Here, therefore, both names of rocks, particularly marketed in India are given to avoid confusion among geologists, engineers and business persons. In addition, non-destructive methods of testing the mechanical properties of rocks - such as ultrasonic pulse velocity and uniaxial compressive strength are discussed. These methods seem to substitute the conventional, hazardous and destructive method of testing of decorative dimension stones. ©2014 Cafet-Innova Technical Society. All rights reserved.
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    El nino effect
    (CAFET INNOVA Technical Society cafetinnova@gmail.com 1-2-18/103, Mohini Mansion, Gagan Mahal Road, Domalguda, Hyderabad 500029, 2014) Reddy, P.R.; Venkat Reddy, D.V.
    [No abstract available]
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    Use of Laterite as a sustainable building material in developing countries
    (CAFET INNOVA Technical Society cafetinnova@gmail.com 1-2-18/103, Mohini Mansion, Gagan Mahal Road, Domalguda, Hyderabad 500029, 2014) Kasthurba, A.K.; Reddy, K.R.; Venkat Reddy, D.V.
    Utilisation of local materials is an important step to sustainable construction to reduce transportation cost, save embodied energy, and protect the environment. This paper advocates the use of local laterite-a soil type rich in iron and alumina formed under hot and wet tropical conditions-due to its cost effectiveness and energy efficiency than that of conventional modern materials in tropical developing countries. This paper summarizes the occurrence and characteristics of laterite and then highlights the need for developing universal database of properties and standard testing protocols to facilitate evaluation and extensive use laterite in building applications. Understanding of properties and potential challenges of using this material will benefit for the development of suitable strategies/techniques for sustainable construction. Overall, this study identifies various factors that should be considered for efficient utilization and managements of laterite in construction to meet the growing demand of new housing and infrastructural in different regions of developing tropical world. © 2014 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.
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    Evaluation of suitability of garnetiferous biotite gneiss for M-sand production - A case study
    (CAFET INNOVA Technical Society cafetinnova@gmail.com 1-2-18/103, Mohini Mansion, Gagan Mahal Road, Domalguda, Hyderabad 500029, 2014) Anand, R.S.; Venkat Reddy, D.V.
    Natural sand are weathered and worn out particles of rocks and are of various grades or size depending on the accounting of wearing. The main natural and cheapest resource of sand is river. River sands are mined from river beds and sand mining has disastrous environmental consequences. Rivers in the southwest coast of India are under immense pressure due to various kinds of human activities among which indiscriminate extraction of construction grade sand is the most disastrous one. The situation is rather alarming in the rivers of Kerala. Indiscriminate of sand has depleted the natural resource and ravaged the rivers of the State. Since sand mining from river caused a lot of environmental issues, the Government has banned mining of the same. Thus, river sand is becoming a scarce commodity and hence exploring alternatives to it has become imminent. The artificial sand (M-sand) produced by proper machines can be a better substitute to river sand. Rock crushed to the required grain size distribution is termed as Manufactured sand (M-Sand). The most common rock in the quarries of Trivandrum is Garnetiferous Biotite gneiss (GBG), followed by Charnockite, Leptynite etc. In present investigation, suitability of the available GBG in Trivandrum area, to be used for m-sand production is verified. For this, a case study was done at Cheriyakonni quarry. The rocks were collected from ‘Metarock Pvt. Ltd.’ m-sand manufacturing plant which collects rock Cheriyakonni quarry, which is rich in GBG. The result of the study gives the best size and best proportion of GBG for m-sand production. © 2014 CAFET-INNOVA TECHNICAL SOCIETY.