Conference Papers

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    Automation of Curing Using Prefabricated Sensors
    (Springer Science and Business Media Deutschland GmbH, 2021) Agarwalla, A.; Das, B.B.
    Curing is one of the universal phenomena followed after casting and finishing of concrete over an extended period of time, which helps to develop the compressive strength and durability by maintaining an optimum moisture and temperature condition. It keeps the concrete hydrated, restricts volumetric shrinkage, provides resistance to abrasion, freezing and thawing. There are many ways to cure concrete but, in this article, discussion will be on automation of curing using IoT and moisture sensors and relays which will likely replicate the lab condition on site by maintaining constant moisture content in concrete by supplying required amount of water. Generally, on site the curing process is carried out for 6–7 days once or twice a day at a large interval as a result of which the free moisture content falls and the rate of hydration decreases. It results in poor compressive strength and durability compared with laboratory samples because the 7 days compressive strength is not achieved which is more important than that of 28 days compressive strength which is successfully achieved in the lab. Various technologies used in this article will help in real-time monitoring of concrete condition with ease which will further be beneficial for the construction industry. This paper will cover how these technologies are integrated to automate the whole process, and its effect on compressive strength of concrete for which a consistent mix of M20, M25, M30 was prepared to compare the result of strength of concrete at 3, 7 and 28 days of curing in three different conditions, giving the strength of in-situ automatically cured concrete sample similar to that of laboratory cured concrete sample and an increase in 16.09% of compressive strength was observed with respect to concrete cured manually in site conditions. © 2021, Springer Nature Singapore Pte Ltd.
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    Design and Development of an IoT-Based Gas Monitoring System for Underground Coal Mines
    (Springer Science and Business Media Deutschland GmbH, 2023) Tripathi, A.K.; Mangalpady, M.; Rao, N.R.N.V.; Ray, S.
    Safety in underground coal mines is a major challenge whenever the mine comprises of toxic gases. The risk of the presence of gas influences the overall productivity of the mines, which is a subject of concern to the mining industry. Therefore, there is a need for real-time monitoring of underground mine environment, so that the miners can be safeguarded in case of presence of toxic gases. In this paper, an attempt was made to evolve and validate an Internet of Things (IoT)-based gas monitoring system for monitoring underground coal mines environment, which includes multiple sensors for real-time measurement of different gases. The developed IoT-based gas monitoring system was tested and validated in the laboratory, under the controlled environmental conditions, for the measurement of carbon dioxide (CO2), carbon monoxide (CO) and methane (CH4) gases. Further, the test results were compared with the readings obtained by the digital multi-gas detector, which confirmed that the developed real-time gas monitoring system yields a good result. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.