Utilization of Different Grain Size of Municipal Solid Waste Bottom Ash in High-Performance Mortars

Xiongwei Li, Yanwei Guo, Rahul Sharma, Amardeep Singh, Hao Zhang, Jiarui Zhang and Yu Fu
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Xiongwei Li: School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China
Yanwei Guo: School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China
Rahul Sharma: School of Civil Engineering, Shri Mata Vaishno Devi University Katra, Jammu 182320, India
Amardeep Singh: School of Civil Engineering & Architecture, Changzhou Institute of Technology, Changzhou 213032, China
Hao Zhang: Henan Shuangjian Technology Development Co., Ltd., Luohe 462000, China
Jiarui Zhang: School of Civil Engineering & Architecture, Changzhou Institute of Technology, Changzhou 213032, China
Yu Fu: School of Civil Engineering & Architecture, Changzhou Institute of Technology, Changzhou 213032, China

Sustainability, 2022, vol. 14, issue 7, 1-14

Abstract: Globalization is bringing increased industrialization and municipal solid waste (MSW). This is a major concern in heavily populated areas. In order to reduce MSW generation, incineration is commonly used, resulting in two types of ashes: bottom and fly ash. Bottom ash is gathered at the incineration bed and is larger in mass than fly ash. To test the qualities of high-performance mortar, MSW-BA in three sizes (fine, medium, and coarse) was replaced with sand at three replacement levels of 10%, 20%, and 30%. The high-performance mortar integrating MSW-BA was tested for hardened density, mechanical properties such as compressive and flexural strength, resistance to NaOH solution, and heavy metal leaching. The substitution level of MSW-BA increased the hardened density of the mortar mixes. The volume change and residual strength of the mortar mixes were measured following exposure to the NaOH solution. Fine-particle mortar mixes shrank whereas medium- and coarse-particle mortar mixes expanded. The largest loss in flexural and compressive strength was recorded when 20% of sand was replaced with a fine fraction of MSW-BA. Heavy metals including cadmium and copper were not leached from MSW-BA combinations of any size. The minuscule amounts of lead and zinc discovered were well below acceptable limits. The present study illustrates the MSW-BA can be utilized as a substitute for sand in the development of high-performance mortar.

Keywords: municipal solid waste; high-performance mortar; mechanical properties; toxicity characteristic leaching procedure (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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