Study on the Influence of Specimen Size and Aggregate Size on the Compressive Strength of Rock-Filled Concrete
Rock-filled concrete (RFC) technology is a new type of mass concrete construction technology, which consists of two basic components: the force transfer frame formed by large-size rock accumulation and the matrix formed by self-compacting concrete (SCC) filling. Its unique construction method also d...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/10/6246 |
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| author | Xiang Li Yufan Zhang Tao Yang Haimei Liao Lei Yu Yunke Liu Guoji Wang Yinghong Zhao Haoyang Qiao |
| author_facet | Xiang Li Yufan Zhang Tao Yang Haimei Liao Lei Yu Yunke Liu Guoji Wang Yinghong Zhao Haoyang Qiao |
| author_sort | Xiang Li |
| collection | DOAJ |
| description | Rock-filled concrete (RFC) technology is a new type of mass concrete construction technology, which consists of two basic components: the force transfer frame formed by large-size rock accumulation and the matrix formed by self-compacting concrete (SCC) filling. Its unique construction method also distinguishes RFC from ordinary concrete in terms of its force characteristics. In this paper, RFC is considered as a composite material consisting of aggregate and SCC; based on the realistic failure process analysis (RFPA) method, the effects of specimen size and aggregate size on the compressive strength of RFC were studied. Firstly, RFC cube specimens were prepared and uniaxial compression tests were conducted. During the preparation process, in order to eliminate the influence of factors such as shape, spatial distribution state, and volume share of aggregates on the compressive strength, aggregates of different sizes were set as spheres and arranged in simple cubic stacking; then a numerical model of RFC with different specimen sizes and different aggregate sizes was established for uniaxial compression numerical simulation experiments to analyze the variation law and failure pattern of the RFC compressive strength. The results indicate that the compressive strength of RFC exhibits a significant size effect and follows a negative exponential function distribution law; with the same volume fraction of aggregate, the smaller the aggregate size, the higher the compressive strength of the RFC will be, and this increasing trend gradually levels off. Based on the findings of this study, it is recommended that the size effect and the reduction of aggregate size on dam strength be taken into account in the design of RFC dams. |
| first_indexed | 2024-03-11T03:57:58Z |
| format | Article |
| id | doaj.art-b80381abfa144405a2983299cdc844e8 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T03:57:58Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-b80381abfa144405a2983299cdc844e82023-11-18T00:22:44ZengMDPI AGApplied Sciences2076-34172023-05-011310624610.3390/app13106246Study on the Influence of Specimen Size and Aggregate Size on the Compressive Strength of Rock-Filled ConcreteXiang Li0Yufan Zhang1Tao Yang2Haimei Liao3Lei Yu4Yunke Liu5Guoji Wang6Yinghong Zhao7Haoyang Qiao8College of Civil Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Civil Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Civil Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Civil Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Civil Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Civil Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Civil Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Civil Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Civil Engineering, Guizhou University, Guiyang 550025, ChinaRock-filled concrete (RFC) technology is a new type of mass concrete construction technology, which consists of two basic components: the force transfer frame formed by large-size rock accumulation and the matrix formed by self-compacting concrete (SCC) filling. Its unique construction method also distinguishes RFC from ordinary concrete in terms of its force characteristics. In this paper, RFC is considered as a composite material consisting of aggregate and SCC; based on the realistic failure process analysis (RFPA) method, the effects of specimen size and aggregate size on the compressive strength of RFC were studied. Firstly, RFC cube specimens were prepared and uniaxial compression tests were conducted. During the preparation process, in order to eliminate the influence of factors such as shape, spatial distribution state, and volume share of aggregates on the compressive strength, aggregates of different sizes were set as spheres and arranged in simple cubic stacking; then a numerical model of RFC with different specimen sizes and different aggregate sizes was established for uniaxial compression numerical simulation experiments to analyze the variation law and failure pattern of the RFC compressive strength. The results indicate that the compressive strength of RFC exhibits a significant size effect and follows a negative exponential function distribution law; with the same volume fraction of aggregate, the smaller the aggregate size, the higher the compressive strength of the RFC will be, and this increasing trend gradually levels off. Based on the findings of this study, it is recommended that the size effect and the reduction of aggregate size on dam strength be taken into account in the design of RFC dams.https://www.mdpi.com/2076-3417/13/10/6246rocked-filled concretecompressive strengthaggregate sizesize effect |
| spellingShingle | Xiang Li Yufan Zhang Tao Yang Haimei Liao Lei Yu Yunke Liu Guoji Wang Yinghong Zhao Haoyang Qiao Study on the Influence of Specimen Size and Aggregate Size on the Compressive Strength of Rock-Filled Concrete Applied Sciences rocked-filled concrete compressive strength aggregate size size effect |
| title | Study on the Influence of Specimen Size and Aggregate Size on the Compressive Strength of Rock-Filled Concrete |
| title_full | Study on the Influence of Specimen Size and Aggregate Size on the Compressive Strength of Rock-Filled Concrete |
| title_fullStr | Study on the Influence of Specimen Size and Aggregate Size on the Compressive Strength of Rock-Filled Concrete |
| title_full_unstemmed | Study on the Influence of Specimen Size and Aggregate Size on the Compressive Strength of Rock-Filled Concrete |
| title_short | Study on the Influence of Specimen Size and Aggregate Size on the Compressive Strength of Rock-Filled Concrete |
| title_sort | study on the influence of specimen size and aggregate size on the compressive strength of rock filled concrete |
| topic | rocked-filled concrete compressive strength aggregate size size effect |
| url | https://www.mdpi.com/2076-3417/13/10/6246 |
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