This study provides an overview of calcium rich industrial wastes usage in construction materials, their properties and different applications through marble waste and flue gas desulfurization (FGD) gypsum. Large quantities of industrial wastes are stockpiled and haphazardly disposed in increasing amounts causing serious environmental concerns. The extensive use of marble and gypsum products is increasing in construction industry and limited amount of natural sources are available, which requires alternative sources of calcium-rich raw materials. The aim of this study is to explore the recycling opportunities for calcium-rich industrial wastes which have good technical properties and can be used as raw materials for civil infrastructure. Utilization of these industrial wastes, leads to increase economical efficiency and it takes a positive step towards the conservation of natural materials, resource recovery and protecting the environment. The findings of the previous work done by different researchers affirm the need of further detailed scientific research for the effective utilization of marble waste and FGD gypsum. As per the present study, approximately 22 million tons of marble waste and 20 million tons of FGD gypsum are expected to be generated by the year 2040 in India. The results of physico-chemical analysis indicated that marble waste and FGD gypsum has potential as raw material for civil infrastructure. This research review focuses on the transformation of marble waste and FGD gypsum towards sustainable production of construction materials, work done so far, current best practices of its utilization and future possibilities.

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中文翻译：

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富钙工业废物综述：印度民用基础设施的可持续原材料来源——循环经济的机遇和挑战

本研究通过大理石废料和烟气脱硫 (FGD) 石膏概述了富含钙的工业废料在建筑材料中的使用、它们的特性和不同应用。大量工业废物被储存和随意处置，数量不断增加，造成严重的环境问题。大理石和石膏产品在建筑行业的广泛使用正在增加，而可用的天然资源数量有限，这就需要富含钙的原材料的替代来源。本研究的目的是探索富钙工业废物的回收机会，这些废物具有良好的技术特性，可用作民用基础设施的原材料。利用这些工业废料，从而提高经济效率，并朝着保护天然材料、资源回收和保护环境迈出了积极的一步。不同研究人员之前所做工作的结果证实，需要进一步详细的科学研究，以有效利用大理石废料和 FGD 石膏。根据目前的研究，到 2040 年，印度预计将产生约 2200 万吨大理石废料和 2000 万吨 FGD 石膏。理化分析结果表明，大理石废料和脱硫石膏具有作为民用基础设施原材料的潜力。本研究综述的重点是将大理石废料和 FGD 石膏转化为建筑材料的可持续生产，迄今为止所做的工作，

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