The Asian Review of Civil Engineering <p>The Asian Review of Civil Engineering is a half-yearly, peer-reviewed journal that publishes original theoretical papers, applied papers, review papers, and case studies on all fields of civil engineering.</p> en-US (S.Saroshkumar) (Ms.Sukanya) Sat, 15 May 2021 00:00:00 +0530 OJS 60 Extraction of Sand from Waste dumps of Mining: A New Approach to Address the Environmental Issue of Goa <p>Goa is India's smallest state by area (3700 but rich of mineral deposits such as -iron ore, manganese ore, bauxite and many minor minerals like basalt, laterite stones, rubbles, river sand etc., Exploration and exploitation for iron ore has started at the beginning of the 20th century. Iron ore mining in Goa is completely in the private sector.&nbsp; The mining belts extend over a length of 65km from SE to NW of the State covering around 700 The iron ore deposits are distributed over the Northern, southern, and central blocks of Goa. It is the only state with large area under mining. Mineral production in Goa started in the late 1940s. Initially with Manganese ore but later shifted to iron ore with phenomenal growth in production. Every year around 60million tonnes of iron ore was being handled till 2015. Subsequently capping has been imposed by Hon’ble Supreme Court to mine 20 million tonnes from 100 mines by open cast method to control the pollution levels.&nbsp; The mining is carried out by mechanized methods and generated large number of employments, around 5 lakh people by both direct and indirect means. The state is having 400 million tonnes of iron ore resources. The highest production of iron ore from Goa was 40 million tonnes per annum in the past, but for extraction of everyone tonne of ore approximately 4 tonnes of waste rock has to be removed as the mining has gone deep and extent of each lease area is small. The waste rock comprises manganiferous and phyletic clays which are soft and easily erodible. Further, Goa witnesses heavy rainfall up to 3500mm during SW monsoon every year, thus the surface waters are getting polluted.&nbsp; As said above the lease areas are being small and the generation of waste rock is high. So, the disposal of waste rock and its prevention poses a problem. The analysis of waste rock indicates the waste rock is rich of sand grains which can be extractable by simple crushing and screening method. So, a detailed conceptual plan is necessary to sustain the mining and to tackle the environmental issues which are suggested in this paper.</p> Ayapilla Narasimha Murthy Copyright (c) 2021 Sat, 15 May 2021 00:00:00 +0530 A Review on Recycled Aggregate based Thermal Insulated Concrete <p>One of the major challenges of our present society is the protection of environment. Therefore concrete must be such that, it can conserve resources, protect the environment through the utilization of waste materials, economize and lead to proper utilization of energy. In India, the approximate rate of production of construction and demolition wastes is reported to be 14.5 million tonnes annually. The most preferable method of managing these solid wastes is to dump them into the landfills. This creates problems such as pollution in landfill areas and highly increased disposal cost in urban areas. Therefore, recycling and re-using these demolition wastes as recycled aggregates to produce the concrete has been identified as a fruitful way to mitigate the scarcity of natural resources, waste management and environmental issues. Another existing problem is of heat balance, heat always flows from warmer to cooler surfaces. This flow does not stop until the temperature in the two surfaces is balanced. Recycled aggregate alone with thermal insulation material reduce the rate of heat transfer. In this paper a study has been made on the past researches carried out by the different scholars and their results have been studied.</p> N. Anuja, M. Balaji Copyright (c) 2021 Sat, 15 May 2021 00:00:00 +0530 Adaptation Strategies to Climate Change Along the East Coast of India <p>The Intergovernmental Panel on Climate Change states that the “Warming in the climate system is unequivocal and since 1950 many changes have been observed throughout the climate system that are unprecedented over decades to millennia. Each of the last three decades has been successively warmer at the Earth’s surface than any preceding decade since1850”. The changing climate resulting in unprecedented monsoon and high intense extreme weather events along the coast of India had created serious effects on the coastal communities. This study is conducted in Lower Vellar basin, Tamil Nadu, India which is vulnerable to floods along the coast witnessing series of cyclones during the north east monsoon and droughts along the plains since the plain region is the tail end of the deltaic zone. The main objectives of the study are to identify the peoples’ perception on climate change and the adaptation strategies by the people in the forest, agricultural and coastal areas of the Lower Vellar Basin to the changing climate. The primary data collection involved the usage of participatory rural appraisal tools like questionnaire, group discussions and key person interviews. The peoples’ perception recorded has shown the change they have felt in the changing climate for the past 15 years. The traditional farmers and fishermen were considered to be the key focal point, since they had witnessed the changing climate over a decade. The factors contributing to the choice of adaptation strategies were analyzed using Multinominal logit modelling to estimate the most influencing factor in the choice of adaptation strategy. Lack of financial support and lack of knowledge on adaptation techniques were the major hindrances to adaptation. This indicates that a people centered development approach at the decentralized level is essential in order to withstand the changing climate and achieve the 2030 sustainable agenda.</p> E. Nivedha, N. K. Ambujam Copyright (c) 2021 Sat, 15 May 2021 00:00:00 +0530