This paper discusses the behavior of solid wastes such as blast furnace flue dust and sludge in steel plants. These wastes consist of metal oxides and coke fines as valuable materials with some alkali oxides. Processing of the wastes as it is obtained from a plant is challenging. In this study, pellets of these wastes were prepared with three types of binders such as molasses, dextrin and bentonite. These pellets were used for the preparation of iron ore sinter in a pot-type laboratory-grade sintering machine. The results reveal that compressive strength and shatter strength are better in the case of bentonite binder. This binder provides high compressive strength as well as minimum shatter index value. Thereafter, utilization of these carbon-containing pellets in sintering operation improves the productivity of sintering machine as well as decreases coke consumption in the process.
Globally, the construction industry is one of the most environmentally catastrophic industries, with a significant effect on the raw materials usage, their commitment of use throughout their whole life cycle, and the atmosphere in which they work. Between 1950 and 2010, global average material consumption rose from 5.0 t to 10.3 ton per capita per year, owing to population growth, industrialization, and increased socio-economic strength. Moreover, this industry uses 35% of produced energy and releases 40% of carbon dioxide into the Earth's atmosphere. One hundred fifty million tons of CDW is made in India according to the BMPTC, and less than 1% is reutilized properly added to that the 55% of total solid waste in India are from the construction industry. The waste produced during the demolition can be well utilized if managed and appropriately recovered, which directly reduces the virgin raw material usage in the new construction, decreasing the amount ending in the landfill. This study aims to understand the strategies and technology for material recovery after the building's life. The literature review will be taken up to list the different strategy in practice for material recovery. The techniques for material recovery are discussed to understand more in detail. This research helps find the other methods for material recovery and equipment and technology during the demolition and reconstruction of the RCC framed structure. The bottlenecks in the adoption of the various strategy are studied in this research.
In the construction industry, formwork plays a critical role in the construction of cast in situ reinforced concrete structures. Due to the rapid growth of the Indian economy, population growth, urbanization, and industrialization, the demand for housing and other built structures is increasing. To meet these requirements, quick construction is needed with less project completion time. The conventional system of formwork comprises nearly 50% of the total project completion time. Wastage and labour requirement is also high in conventional formwork systems. So, the use of modern formwork systems like aluminium formwork, tunnel formwork, etc., is increasing in the Indian construction industry. This paper aims to discuss and evaluate the various formwork systems available, and to show their impact on project duration, cost, quality, cycle-time, number of repetitions, labour requirements. Through literature review, data about various formwork systems available all over the world are collected. The current practices in India are known from various stakeholders through a questionnaire survey. Data analysis will be done using the data collected from the literature review and the questionnaire survey. The research will highlight the benefits and comparison of various types of formworks in terms of project duration, cost, quality, cycle-time, number of repetitions, labour requirements. This study concluded that implementing the modern formwork systems will improve the quality, safety, efficiency and minimise the cost and waste in construction. Keywords: Conventional formwork; Modern formwork systems; fast-track construction; Comparison; Indian construction sector.
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