Author
Ismail Luhar
Bio: Ismail Luhar is an academic researcher from Shri Jagdishprasad Jhabarmal Tibrewala University. The author has contributed to research in topics: Geopolymer & Medicine. The author has an hindex of 9, co-authored 21 publications receiving 357 citations.
Papers
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TL;DR: In this paper, waste rubber tire fibres are employed as a partial substitute of fine aggregates to develop rubberized geopolymer concrete and investigate on its strength and durability criteria including abrasion resistance of fly ash based rubberized geopolymer concrete.
113 citations
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TL;DR: In this article, a comparative study of thermal resistance of fly ash based geopolymer concrete and rubberized geopolym concrete is presented, where the authors use waste rubber tire fibres as a partial substitute for natural river sand, providing an efficient solution to the disposal problems of both fly ash and waste rubber.
Abstract: This research paper presents the first scientific attempt at a comparative study of thermal resistance of fly ash based geopolymer concrete and rubberized geopolymer concrete. In this study, rubberized fly ash based geopolymer concrete has been prepared using waste rubber tire fibres as a partial substitute for natural river sand, providing an efficient solution to the disposal problems of both fly ash and waste rubber. Changes in the weight, compressive strength , density, and microstructure of control and rubberized fly ash based geopolymer concrete at room temperature, and after thermal treatment at 200 °C, 400 °C, 600 °C and 800 °C for two hours, have been investigated using X-ray diffraction (XRD), Fourier transform spectrometry (FTIR) and thermogravimetric analysis (TGA-DTA). Results indicate that the loss in strength for rubberized geopolymer concrete at elevated temperatures is only slightly higher than that of the control geopolymer concrete because of the probable mismatch between the coefficients of thermal expansion of the integral materials.
110 citations
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TL;DR: In this article, a review of the available literatures on UHPFRCs that examine the attributes of ideal UHP-FRC, such as mechanical properties viz., compressive, tensile and flexural strengths; mixing proportions and environment friendliness; curing regimes; effect of specimens size on its compressive and tensile strength as well as loading rate; effects of fibre properties.
88 citations
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TL;DR: In this paper, a review of the studies on the incorporation of emerging natural wastes from agricultural farming (NWAGF) and NWAQF as supplementary material in the development of diverse green concretes is presented.
Abstract: The principal objective of this review manuscript is to reassess the studies on the incorporation of emerging natural wastes from agricultural farming (NWAGF) and natural wastes from aquacultural farming (NWAQF) as supplementary material in the development of diverse green concretes. Intending to dispose off or at least prevent these types of wastes from converting to heaps of health hazards, the systematic consumption of them is essential. This paper reviews applications of some of the natural wastes of agriculture farming obtained from Bamboo; Corn or Maize; Barley; Wheat; Olive; Bananas or Plantains; Elephant grass; Sisal; and Date or Date Palm, as well as of aquaculture farming achieved from Oyster and Mussel along with Periwinkle shells to utilize it as partial replacement of aggregates or binder in green concrete. Thus, systematic applications of these wastes will not only facilitate to preserve restricted natural resources of accustomed aggregates of concrete but also lend a hand to solve the predicaments of landfilling and health hazards owing to its disposal in open spaces. Replacement of OPC by these wastes escorts to mitigate CO2 emissions into the atmosphere which, in turn, provides relief to global warming. This paper also reviews the effect of the said wastes on the workability, strength and durability performance of the green concrete. The principal findings of this review revealed that NWAGF and NWAQF as supplementary materials could be successfully incorporated through partial replacement of OPC or fine or coarse aggregates in producing green concrete mixtures facilitating to protect environments from contaminations. Nonetheless, a momentous inevitability is experienced to comprehend it more appositely. The best verdict of this review paper state that even though the addition of NWAGF and NWAQF in green concrete demonstrated some of the attributes inauspiciously, but suitable treatment techniques and proper selection of these supplementary materials would unquestionably smooth the progress of the production of green concrete with enhanced performances. Novel updated data to know a variety of NWAGF and NWAQF are essential for the incorporation of apposite supplementary materials to develop environmental friendly sustainable green concrete that not merely conserve the severe degradation of restricted natural resources but also shield from the pessimistic impact on environments, air, groundwater, soils, etc.
81 citations
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TL;DR: In this paper, the essential stages in the development of the innovative category of eco-friendly inorganic inorganic Geopolymer concrete throwing lights on the Waste of Glasses valorisation concerning their amalgamation in producing GPCs particularly pertaining to its durability properties.
68 citations
Cited by
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01 Aug 2010
TL;DR: Stereolithography is a solid freeform technique (SFF) that was introduced in the late 1980s as discussed by the authors, which has the highest fabrication accuracy and an increasing number of materials that can be processed is becoming available.
Abstract: Stereolithography is a solid freeform technique (SFF) that was introduced in the late 1980s Although many other techniques have been developed since then, stereolithography remains one of the most powerful and versatile of all SFF techniques It has the highest fabrication accuracy and an increasing number of materials that can be processed is becoming available In this paper we discuss the characteristic features of the stereolithography technique and compare it to other SFF techniques The biomedical applications of stereolithography are reviewed, as well as the biodegradable resin materials that have been developed for use with stereolithography Finally, an overview of the application of stereolithography in preparing porous structures for tissue engineering is given
319 citations
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TL;DR: The role of smart technologies can become very important and useful to solve the main population issues nowadays and provide foundations for a sustainable future as mentioned in this paper, however, the main challenge is to reduce the effects of global warming and ensure a balanced economic development of society.
235 citations
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TL;DR: In this paper, the authors provide a fundamental insight into the integrated applications of rubberized concrete composite materials to improve construction methods, including applications to enhance environmental sustainability of concrete structures in the construction industry.
210 citations
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10 Feb 2021
TL;DR: In this article, an online survey was carried out to identify the types of face mask and number of masks used per week by an individual from 1033 people, based on this survey and available literature, this study quantifies the amount of plastics waste generated by face masks.
Abstract: The ongoing COVID-19 disease significantly affects not only human health, it also affects the wealth of country’ economy and everyday routine of human life. To control the spread of the virus, face mask is used as primary personal protective equipment (PPE). Thus, the production and usage of face masks significantly increase as the COVID-19 pandemic still escalating. Further, most of these masks contain plastics or other derivatives of plastics. Therefore, this extensive usage of face masks generates million tons of plastic wastes to the environments in a short span of time. This study aims to investigate the environmental impact induced by face mask wastes and sustainable solution to reduce this waste. An online survey was carried out to identify the types of face mask and number of masks used per week by an individual from 1033 people. Based on this survey and available literature, this study quantifies the amount of plastics waste generated by face masks. However, this survey was limited with certain ages, country and durations (July–August 2020). Thus, the prediction of plastic waste generation, only provide fundamental knowledge about the mask wastes. Results revealed that there is a huge plastic waste remained in land and marine environment in the form of mask waste, which will contribute to micro-plastic pollution. Therefore, this paper also highlights the sustainable approach to the mask production by integrating the use of natural plant fiber in the woven face mask technology to reduce the plastic waste induced by masks. Further, upcycling the mask waste and producing construction materials also discussed.
160 citations
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TL;DR: In this article, the effects of steel fiber reinforcement on the compressive and tensile strength of UHPC are discussed. But the effect of fibres on compressive strength seems to be questionable.
141 citations