Pore characteristics and mechanical behaviors of autoclaved aerated concrete produced from coal bottom ash and tailings
Abstract The solid wastes such as coal bottom ash and tailings are currently widely used in various building materials, but further research on their application in autoclaved aerated concrete (AAC) is needed. To study the physical and mechanical properties of AAC produced from coal bottom ash and t...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2024-03-01
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| Series: | Engineering Reports |
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| Online Access: | https://doi.org/10.1002/eng2.12834 |
| _version_ | 1797279351189798912 |
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| author | Mingyuan Zhang Huayan Yao Yuting Liu Jiarui Gan Lingxiao Tang |
| author_facet | Mingyuan Zhang Huayan Yao Yuting Liu Jiarui Gan Lingxiao Tang |
| author_sort | Mingyuan Zhang |
| collection | DOAJ |
| description | Abstract The solid wastes such as coal bottom ash and tailings are currently widely used in various building materials, but further research on their application in autoclaved aerated concrete (AAC) is needed. To study the physical and mechanical properties of AAC produced from coal bottom ash and tailings, the pore characteristics of two different density grades of AAC were extracted and analyzed, and wave velocity and uniaxial compressive tests under water‐saturated and dry conditions were carried out. The results show that the AAC produced from solid waste has excellent performance. The specimen is anisotropic, and the pore size distribution of its cross‐section is mainly concentrated in the ranges of <0.1, 0.1–0.5, and 0.5–1.0 mm. The pore size perpendicular to the direction of rise is smaller and the pores number is greater. The wave velocity and uniaxial compressive strength of the test specimens in the water‐saturated state are significantly lower than those in the dry state. The strengths of specimens loaded perpendicular to the direction of rise are higher than those loaded parallel to the direction of rise whether water‐saturated or dry. The failure mode of the water‐saturated specimens are different from those of dry specimens, which is manifested in the act that there are fewer surface cracks when the specimens fail in the water‐saturated state, while there are more surface cracks in the dry specimens, and their morphology is irregular. The physicochemical effect between water and components and the mechanical effect of pore water are the reasons for the deterioration of AAC's mechanical properties. The results help to reveal the performance of AAC produced from solid waste and have good practical significance. |
| first_indexed | 2024-03-07T16:24:02Z |
| format | Article |
| id | doaj.art-d5d84eefdff249a696de59c2c5b1f07d |
| institution | Directory Open Access Journal |
| issn | 2577-8196 |
| language | English |
| last_indexed | 2024-03-07T16:24:02Z |
| publishDate | 2024-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Engineering Reports |
| spelling | doaj.art-d5d84eefdff249a696de59c2c5b1f07d2024-03-04T01:40:41ZengWileyEngineering Reports2577-81962024-03-0163n/an/a10.1002/eng2.12834Pore characteristics and mechanical behaviors of autoclaved aerated concrete produced from coal bottom ash and tailingsMingyuan Zhang0Huayan Yao1Yuting Liu2Jiarui Gan3Lingxiao Tang4School of Civil Engineering Hefei University of Technology Hefei ChinaSchool of Civil Engineering Hefei University of Technology Hefei ChinaAnhui Gaudi Circular Economy Industrial Park Co., Ltd. Lu'an ChinaSchool of Civil Engineering Hefei University of Technology Hefei ChinaSchool of Civil Engineering Hefei University of Technology Hefei ChinaAbstract The solid wastes such as coal bottom ash and tailings are currently widely used in various building materials, but further research on their application in autoclaved aerated concrete (AAC) is needed. To study the physical and mechanical properties of AAC produced from coal bottom ash and tailings, the pore characteristics of two different density grades of AAC were extracted and analyzed, and wave velocity and uniaxial compressive tests under water‐saturated and dry conditions were carried out. The results show that the AAC produced from solid waste has excellent performance. The specimen is anisotropic, and the pore size distribution of its cross‐section is mainly concentrated in the ranges of <0.1, 0.1–0.5, and 0.5–1.0 mm. The pore size perpendicular to the direction of rise is smaller and the pores number is greater. The wave velocity and uniaxial compressive strength of the test specimens in the water‐saturated state are significantly lower than those in the dry state. The strengths of specimens loaded perpendicular to the direction of rise are higher than those loaded parallel to the direction of rise whether water‐saturated or dry. The failure mode of the water‐saturated specimens are different from those of dry specimens, which is manifested in the act that there are fewer surface cracks when the specimens fail in the water‐saturated state, while there are more surface cracks in the dry specimens, and their morphology is irregular. The physicochemical effect between water and components and the mechanical effect of pore water are the reasons for the deterioration of AAC's mechanical properties. The results help to reveal the performance of AAC produced from solid waste and have good practical significance.https://doi.org/10.1002/eng2.12834autoclaved aerated concretecompressive strengthimage processingloading directionporosity characteristicswater‐saturated |
| spellingShingle | Mingyuan Zhang Huayan Yao Yuting Liu Jiarui Gan Lingxiao Tang Pore characteristics and mechanical behaviors of autoclaved aerated concrete produced from coal bottom ash and tailings Engineering Reports autoclaved aerated concrete compressive strength image processing loading direction porosity characteristics water‐saturated |
| title | Pore characteristics and mechanical behaviors of autoclaved aerated concrete produced from coal bottom ash and tailings |
| title_full | Pore characteristics and mechanical behaviors of autoclaved aerated concrete produced from coal bottom ash and tailings |
| title_fullStr | Pore characteristics and mechanical behaviors of autoclaved aerated concrete produced from coal bottom ash and tailings |
| title_full_unstemmed | Pore characteristics and mechanical behaviors of autoclaved aerated concrete produced from coal bottom ash and tailings |
| title_short | Pore characteristics and mechanical behaviors of autoclaved aerated concrete produced from coal bottom ash and tailings |
| title_sort | pore characteristics and mechanical behaviors of autoclaved aerated concrete produced from coal bottom ash and tailings |
| topic | autoclaved aerated concrete compressive strength image processing loading direction porosity characteristics water‐saturated |
| url | https://doi.org/10.1002/eng2.12834 |
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