Recycling of municipal solid waste incineration by-product for cement composites preparation

Yang, Zhenzhou; Ji, Ren; Liu, Lili; Wang, Xidong; Zhang, Zuotai

doi:10.1016/j.conbuildmat.2017.12.081

Cited by 112 publications

(43 citation statements)

References 32 publications

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“…Additionally, appropriately designed blended cement can provide short-or longterm strength and improved workability [127]. Therefore, many researchers have attempted to incorporate MSWI ashes into Portland cement as SCMs [62,[128][129][130][131][132][133][134][135][136] Several methods have been reported for producing ash-blended cement [62,[128][129][130][131][132][133][134][135]. The first approach involves mixing Portland cement with MSWI ash "as is" [62,128,130].…”

Section: Cement Paste (Blended Cement)mentioning

confidence: 99%

“…The second approach involves applying prewashing or magnetic separation to the MSWI ash before it is mixed with Portland cement. This approach can remove chloride, alkalis, and metallic components that degrade the performance of the cement [129,135]. The third approach involves the enhancement of the MSWI ash through mechanical, chemical, or thermal treatment before the MSWI ash is combined with Portland cement [132,133].…”

Section: Cement Paste (Blended Cement)mentioning

confidence: 99%

“…The third approach involves the enhancement of the MSWI ash through mechanical, chemical, or thermal treatment before the MSWI ash is combined with Portland cement [132,133]. Several methods have been reported for producing ash-blended cement [62,[128][129][130][131][132][133][134][135]. The first approach involves mixing Portland cement with MSWI ash "as is" [62,128,130].…”

Section: Cement Paste (Blended Cement)mentioning

confidence: 99%

“…Additionally, appropriately designed blended cement can provide short- or long-term strength and improved workability [ 127 ]. Therefore, many researchers have attempted to incorporate MSWI ashes into Portland cement as SCMs [ 62 , 128 , 129 , 130 , 131 , 132 , 133 , 134 , 135 , 136 ]. MSWI ashes generally have high contents of calcium oxide and silicon dioxide, which are the main chemical components of Portland cement [ 120 , 121 , 122 , 123 ].…”

Section: Mswi Ashes As Construction Materialsmentioning

confidence: 99%

“…Several methods have been reported for producing ash-blended cement [ 62 , 128 , 129 , 130 , 131 , 132 , 133 , 134 , 135 ]. The first approach involves mixing Portland cement with MSWI ash “as is” [ 62 , 128 , 130 ].…”

Section: Mswi Ashes As Construction Materialsmentioning

confidence: 99%

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Municipal Solid Waste Incineration (MSWI) Ashes as Construction Materials—A Review

Cho

Nam

et al. 2020

Materials

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Over the past decades, extensive studies on municipal solid waste incineration (MSWI) ashes have been performed to develop more effective recycling and waste management programs. Despite the large amount of research activities and the resulting improvements to MSWI ashes, the recycling programs for MSWI ashes are limited. For instance, although the U.S. generates more MSWI ashes than any other country in the world, its reuse/recycle programs are limited; bottom ash and fly ash are combined and disposed of in landfills. Reuse of MSWI ashes in the construction sectors (i.e., geomaterials, asphalt paving, and concrete products) as replacements for raw materials is one of most promising options because of the large consumption and relatively lenient environmental criteria. The main objective of this study was to comprehensively review MSWI ashes with regard to specific engineering properties and their performance as construction materials. The focus was on (1) the current practices of MSWI ash management (in particular, a comparison between European countries and the U.S.), (2) the engineering properties and performance of ashes when they are used as substitutes of construction materials and for field applications, and (3) the environmental properties and criteria for the use of MSWI ashes. Overall, the asphalt and concrete applications are the most promising, from both the mechanical and leachate viewpoints. However, cons were also observed: high absorption of MSWI ash requires a high asphalt binder content in hot-mix asphalt, and metallic elements in the ash may generate H2 gas in the high-pH environment of the concrete. These side effects can be predicted via material characterization (i.e., chemical and physical), and accordingly, proper treatment and/or modified mix proportioning can be performed prior to use.

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