Gaurang Joshi

Bio: Gaurang Joshi is an academic researcher. The author has contributed to research in topics: Sorptivity & Cement. The author has an hindex of 1, co-authored 1 publications receiving 1 citations.

Study on the Efficacy of Natural Pozzolans in Cement Mortar

Abstract: With the advent of the Industrial Revolution, science and technology grew rapidly with the producing era coming into view. The early industrial sectors engaged in small scale production of the major pollutant, smoke. Owing to the emergence of numerous factories and large scale jobs, the problems of industrial contaminating activities began to assume much importance. These issues made the burning up of industrial as well as agricultural waste products from industrial activities become the main focus of waste eradication study for environmental, economical, as well as technical reasons. Discarding of waste techniques became the problem emerging from constant industrial and technological development. Partial replacement of pozzolans by manufacturing waste product is not just efficient but an improvement to features of clean as well as cynical concrete. This is because it involves reducing the shrinkage, minimizing the cracks, as well as enhancing the sturdiness. Besides, the safe removal of waste substances serves as a means of shielding the surroundings from contamination. The main purpose of this research is to observe the ability and strength of the mortar by mixing the calcined clay in a mortar mix in the proportion of 0, 4, 8, 12, 16 and 20% and with this, the effect of mortar on HCl and acetic acid mixed in water in a proportional proportion has been studied.

Durability and Microstructure Characteristics of Concrete with Supplementary Cementitious Materials

Abstract: Considering the environmental impact of cement manufacturing industries, this paper concerns the potential of using supplementary cementitious materials ( SCMs ), like fly ash and ground granulated blast furnace slag, as being essential to replacing the existing Ordinary Portland Cement ( OPC ). The objective of this paper is to study the microstructural characteristics of concrete with SCMs and improve the durability of the product to increase the lifespan of concrete structures. Replacement SCMs in OPC are 0, 40, 50, and 60 by percentage of cement weight, and we have taken a water-binder ratio of 0.40 for M40 grade and 0.28 for M60 grade concrete. The physical properties and chemical composition of OPC, Ground Granulated Blast-furnace Slag ( GGBS ), and fly ash were identified, and three different experiments were conducted to determine the resistance to penetration of chloride ions and corrosion processes. The rapid chloride permeability test, accelerated corrosion, and sorptivity tests were employed to measure concrete's resistance to the effects of aggressive environments and examine the durability properties. The most performed grade samples were analyzed as individual microspheres with Scanning Electron Microscopy ( SEM ), Energy Dispersive X-Ray Spectroscopy ( EDXS ), and X-ray diffraction. Significant improvements in various concrete properties were achieved through the partial replacement of fly ash and GGBS with cement.

Development of Sustainable Concrete from Hypo Sludge Combined with Basalt Fibre and Latex

Abstract: Cement production is a major source of carbon dioxide pollution. An environmentally friendly concrete needs to be developed in order to overcome the adverse environmental impacts of cement production and the continuing depletion of natural resources. Paper waste (hypo sludge) from the paper industry is becoming a challenge due to its extensive area requirements for disposal and continually increasing adverse environmental effects. To reduce paper waste and pollution, it might be beneficial to use it as hypo sludge in concrete mixes. In the present investigation, hypo sludge was used as a partial replacement in varied proportions (5, 10, 15, 20, 25, and 30%) of cement in concrete of M30 grade to be assessed. Styrene–butadiene rubber (SBR) latex and basalt fibre (BF) were added to hypo sludge concrete to improve its durability and post-cracking behaviour. From the test results, the optimum dosage of hypo sludge, basalt fibre, and SBR latex was found to be 15%, 0.3%, and 10%, respectively. From the mechanical properties testing compared with the control concrete, latex-added hypo sludge basalt fibre showed an increase in compressive strength by 17.08%, flexural strength by 14.55% and tensile strength by 14.29%. Microstructural results showed that SBR latex created greater consistency in the interaction of the concrete stages. Results of the tests indicate that the performance of the concrete in terms of its strength was improved by partially replacing the cement in the concrete with hypo sludge.