Analysis of pore structure characteristics of MSWI bottom ash micro powder concrete
Municipal solid waste incineration (MSWI) bottom ash is a type of bulk waste. Its potential activity can be better harnessed after it is ground into a fine powder, leading to reduced carbon emissions. This paper investigates the pore structure of MSWI bottom ash micro powder concrete and its impact...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509524001505 |
| _version_ | 1797267174458392576 |
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| author | Li Hanghang Shi Dongsheng Li Hao Han Ping |
| author_facet | Li Hanghang Shi Dongsheng Li Hao Han Ping |
| author_sort | Li Hanghang |
| collection | DOAJ |
| description | Municipal solid waste incineration (MSWI) bottom ash is a type of bulk waste. Its potential activity can be better harnessed after it is ground into a fine powder, leading to reduced carbon emissions. This paper investigates the pore structure of MSWI bottom ash micro powder concrete and its impact on mechanical properties. Standard tests were conducted to evaluate the mechanical properties of MSWI bottom ash micro powder concrete with four blending ratios under three water-binder ratios. Subsequently, a mercury intrusion test was performed to determine its internal pore structure characteristic parameters. Remaining specimens from the macroscopic test were sampled, and concrete specimens were observed using a high-power electronic environmental scanning microscope to analyze morphological characteristics at various multiples and curing ages. The results indicate that the pore structure of MSWI bottom ash micro powder concrete is uniformly distributed, displaying good fractal characteristics conducive to subsequent secondary hydration reactions. The inclusion of MSWI bottom ash micro powder increases concrete porosity, leading to a decrease in compressive strength. However, as the curing age increases, the value tends to approach that of ordinary concrete, suggesting that MSWI bottom ash micro powder exhibits potential hydraulicity, albeit with a slow hydration reaction. The observed pattern of MSWI bottom ash micro powder concrete aligns with that of ordinary concrete, wherein higher porosity corresponds to lower compressive strength. The addition of MSWI bottom ash micro powder increases concrete porosity, resulting in reduced compressive strength. |
| first_indexed | 2024-04-25T01:12:23Z |
| format | Article |
| id | doaj.art-49b2728300544b43a25f6805becf9c78 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-04-25T01:12:23Z |
| publishDate | 2024-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-49b2728300544b43a25f6805becf9c782024-03-10T05:12:11ZengElsevierCase Studies in Construction Materials2214-50952024-07-0120e02999Analysis of pore structure characteristics of MSWI bottom ash micro powder concreteLi Hanghang0Shi Dongsheng1Li Hao2Han Ping3Inner Mongolia University of Technology, Hohhot 010051, ChinaInner Mongolia University of Technology, Hohhot 010051, China; Key Laboratory of Civil Engineering Structure and Mechanics of Inner Mongolia Autonomous Region, Hohhot 010051, China; Corresponding author at: Inner Mongolia University of Technology, Hohhot 010051, China.Inner Mongolia University of Technology, Hohhot 010051, ChinaXingtai Construction Group Co., Ltd, Ordos 017000, ChinaMunicipal solid waste incineration (MSWI) bottom ash is a type of bulk waste. Its potential activity can be better harnessed after it is ground into a fine powder, leading to reduced carbon emissions. This paper investigates the pore structure of MSWI bottom ash micro powder concrete and its impact on mechanical properties. Standard tests were conducted to evaluate the mechanical properties of MSWI bottom ash micro powder concrete with four blending ratios under three water-binder ratios. Subsequently, a mercury intrusion test was performed to determine its internal pore structure characteristic parameters. Remaining specimens from the macroscopic test were sampled, and concrete specimens were observed using a high-power electronic environmental scanning microscope to analyze morphological characteristics at various multiples and curing ages. The results indicate that the pore structure of MSWI bottom ash micro powder concrete is uniformly distributed, displaying good fractal characteristics conducive to subsequent secondary hydration reactions. The inclusion of MSWI bottom ash micro powder increases concrete porosity, leading to a decrease in compressive strength. However, as the curing age increases, the value tends to approach that of ordinary concrete, suggesting that MSWI bottom ash micro powder exhibits potential hydraulicity, albeit with a slow hydration reaction. The observed pattern of MSWI bottom ash micro powder concrete aligns with that of ordinary concrete, wherein higher porosity corresponds to lower compressive strength. The addition of MSWI bottom ash micro powder increases concrete porosity, resulting in reduced compressive strength.http://www.sciencedirect.com/science/article/pii/S2214509524001505MSWI bottom ash micro powderConcretePore structureMechanical property |
| spellingShingle | Li Hanghang Shi Dongsheng Li Hao Han Ping Analysis of pore structure characteristics of MSWI bottom ash micro powder concrete Case Studies in Construction Materials MSWI bottom ash micro powder Concrete Pore structure Mechanical property |
| title | Analysis of pore structure characteristics of MSWI bottom ash micro powder concrete |
| title_full | Analysis of pore structure characteristics of MSWI bottom ash micro powder concrete |
| title_fullStr | Analysis of pore structure characteristics of MSWI bottom ash micro powder concrete |
| title_full_unstemmed | Analysis of pore structure characteristics of MSWI bottom ash micro powder concrete |
| title_short | Analysis of pore structure characteristics of MSWI bottom ash micro powder concrete |
| title_sort | analysis of pore structure characteristics of mswi bottom ash micro powder concrete |
| topic | MSWI bottom ash micro powder Concrete Pore structure Mechanical property |
| url | http://www.sciencedirect.com/science/article/pii/S2214509524001505 |
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