Author
Prasanna Venkatesan Ramani
Bio: Prasanna Venkatesan Ramani is an academic researcher from VIT University. The author has contributed to research in topics: Sodium silicate & Portland cement. The author has co-authored 2 publications.
Papers
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TL;DR: A statistical experiment was conducted on selected male construction workers, and ANOVA technique was used to analyse the influence of parameters (like age, body mass index (BMI), material lifting height and lifting frequency) on maximum allowable weight limit (MAWL).
Abstract: Construction is one of the most hazardous industries involving high manual labour where health and safety risks are plentiful. This study focuses on evaluating the factors affecting the material lifting capacity of Indian male construction workers. A statistical experiment was conducted on selected male construction workers, and ANOVA technique was used to analyse the influence of parameters (like age, body mass index (BMI), material lifting height and lifting frequency) on maximum allowable weight limit (MAWL). From the analysis, maximum allowable weight limit (MAWL) and minimum lifting weight were determined for every worker based on his age and BMI corresponding to three different lift frequencies and lifting heights. The results indicate that for all BMI categories, the MAWL increases with the increase in the age of workers to a certain extent, but it decreases as the age increases. Using the maximum and minimum lifting weight values obtained, it will be easy to assign manual lifting tasks for workers without compromising their health at the same time ensuring optimum utilization of their efficiency.
01 Jan 2021
TL;DR: In this article, the authors used ground-granulated blast furnace slag (GGBS) as a primary binder which was replaced with BRHA in different proportions of 10, 20 and 30% by weight.
Abstract: Concrete production requires a large amount of Ordinary Portland Cement (OPC) which contributes to enormous carbondioxide emission leading to serious environmental problems. Geopolymer concrete (GPC) is one of the innovative solutions to overcome such environmental issues concerning OPC usage. It is produced by mixing mineral admixtures rich in silica and alumina with alkaline activators resulting in binders due to the polymerization reaction. In this study, GPC was produced using the mineral admixture ground-granulated blast furnace slag (GGBS) as a primary binder which was replaced with black rice husk ash (BRHA) in different proportions of 10, 20 and 30% by weight. A mixture of sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) was used as the alkaline activators. After the application of oven curing, the specimens were exposed to acid and seawater resistance tests for 30, 60 and 90 days to evaluate the durability properties of geopolymer concrete. The experimental results showed that the addition of BRHA to geopolymer concrete specimens (GPR1 and GPR2) showed better resistance against acid and seawater as the weight and strength losses were lower for 10 and 20% replacement levels than the control specimens (GP).