Mixture Design and Mechanical Properties of Recycled Mortar and Fully Recycled Aggregate Concrete Incorporated with Fly Ash
Recycled aggregate concrete (RAC) is a sort of green, low carbon, environmental protection building material, its application is of great significance to the low carbonization of the construction industry. The performance and strength of RAC are much lower than natural aggregate concrete (NAC), whic...
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| Format: | Article |
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MDPI AG
2022-11-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/22/8143 |
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| author | Lijuan Zhang Dong Ding Jun Zhao Guosen Zhou Zhi Wang |
| author_facet | Lijuan Zhang Dong Ding Jun Zhao Guosen Zhou Zhi Wang |
| author_sort | Lijuan Zhang |
| collection | DOAJ |
| description | Recycled aggregate concrete (RAC) is a sort of green, low carbon, environmental protection building material, its application is of great significance to the low carbonization of the construction industry. The performance and strength of RAC are much lower than natural aggregate concrete (NAC), which are the key factors restricting its application. Class F fly ash is a cementitious material that is considered environmentally hazardous. In this paper, appropriate water-binder (<i>w</i>/<i>b</i>) ratios were found through a mortar expansion test at first. The compressive strength of recycled mortar incorporated with class F fly ash was further studied. On this basis, the mechanical properties of nine groups of fully recycled aggregate concrete (FRAC) with a <i>w</i>/<i>b</i> ratio of 0.3, 0.35, and 0.4, and fly ash replacement ratios of 0, 20%, and 40%, were studied. The influence of the <i>w</i>/<i>b</i> ratio and fly ash replacement ratio on mechanical properties was analyzed and compared with previous research results. In addition, the conversion formulas between the splitting tensile strength, flexural strength, and compressive strength of FRAC were fitted and established. The research results have a certain guiding significance for the mixture design of FRAC and further application of class F fly ash. |
| first_indexed | 2024-03-09T18:12:17Z |
| format | Article |
| id | doaj.art-e2cd887329d541ccba5e2c1c6b2266f4 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T18:12:17Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-e2cd887329d541ccba5e2c1c6b2266f42023-11-24T09:05:00ZengMDPI AGMaterials1996-19442022-11-011522814310.3390/ma15228143Mixture Design and Mechanical Properties of Recycled Mortar and Fully Recycled Aggregate Concrete Incorporated with Fly AshLijuan Zhang0Dong Ding1Jun Zhao2Guosen Zhou3Zhi Wang4School of Mechanics and Safety Engineering, Zhengzhou University, No. 100 Science Avenue, Zhengzhou 450001, ChinaSchool of Mechanics and Safety Engineering, Zhengzhou University, No. 100 Science Avenue, Zhengzhou 450001, ChinaSchool of Mechanics and Safety Engineering, Zhengzhou University, No. 100 Science Avenue, Zhengzhou 450001, ChinaForth Co., Ltd. of China Construction Fifth Division, 69 Shihua Road, Guancheng District, Zhengzhou 450004, ChinaSchool of Mechanics and Safety Engineering, Zhengzhou University, No. 100 Science Avenue, Zhengzhou 450001, ChinaRecycled aggregate concrete (RAC) is a sort of green, low carbon, environmental protection building material, its application is of great significance to the low carbonization of the construction industry. The performance and strength of RAC are much lower than natural aggregate concrete (NAC), which are the key factors restricting its application. Class F fly ash is a cementitious material that is considered environmentally hazardous. In this paper, appropriate water-binder (<i>w</i>/<i>b</i>) ratios were found through a mortar expansion test at first. The compressive strength of recycled mortar incorporated with class F fly ash was further studied. On this basis, the mechanical properties of nine groups of fully recycled aggregate concrete (FRAC) with a <i>w</i>/<i>b</i> ratio of 0.3, 0.35, and 0.4, and fly ash replacement ratios of 0, 20%, and 40%, were studied. The influence of the <i>w</i>/<i>b</i> ratio and fly ash replacement ratio on mechanical properties was analyzed and compared with previous research results. In addition, the conversion formulas between the splitting tensile strength, flexural strength, and compressive strength of FRAC were fitted and established. The research results have a certain guiding significance for the mixture design of FRAC and further application of class F fly ash.https://www.mdpi.com/1996-1944/15/22/8143recycled mortarrecycled concretemixture proportion methodmechanical propertiesfly ash |
| spellingShingle | Lijuan Zhang Dong Ding Jun Zhao Guosen Zhou Zhi Wang Mixture Design and Mechanical Properties of Recycled Mortar and Fully Recycled Aggregate Concrete Incorporated with Fly Ash Materials recycled mortar recycled concrete mixture proportion method mechanical properties fly ash |
| title | Mixture Design and Mechanical Properties of Recycled Mortar and Fully Recycled Aggregate Concrete Incorporated with Fly Ash |
| title_full | Mixture Design and Mechanical Properties of Recycled Mortar and Fully Recycled Aggregate Concrete Incorporated with Fly Ash |
| title_fullStr | Mixture Design and Mechanical Properties of Recycled Mortar and Fully Recycled Aggregate Concrete Incorporated with Fly Ash |
| title_full_unstemmed | Mixture Design and Mechanical Properties of Recycled Mortar and Fully Recycled Aggregate Concrete Incorporated with Fly Ash |
| title_short | Mixture Design and Mechanical Properties of Recycled Mortar and Fully Recycled Aggregate Concrete Incorporated with Fly Ash |
| title_sort | mixture design and mechanical properties of recycled mortar and fully recycled aggregate concrete incorporated with fly ash |
| topic | recycled mortar recycled concrete mixture proportion method mechanical properties fly ash |
| url | https://www.mdpi.com/1996-1944/15/22/8143 |
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