Experimental Application of Cement-Stabilized Pavement Base with Low-Grade Metamorphic Rock Aggregates
Low-grade metamorphic rock (LMR) is a kind of stone that is widely distributed in China. The alkali activity strictly prevents its application in conventional concrete. This paper evaluates the possibility of using LMR aggregate in cement-stabilized pavement base (CSPB). The compressive strength of...
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MDPI AG
2022-05-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/12/5/589 |
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| author | Qian Yang Yi Liu Haotian Zou Xiaoxiong Wang Guohuan Gong Yinnan Cheng Liang Zhang Zhengwu Jiang |
| author_facet | Qian Yang Yi Liu Haotian Zou Xiaoxiong Wang Guohuan Gong Yinnan Cheng Liang Zhang Zhengwu Jiang |
| author_sort | Qian Yang |
| collection | DOAJ |
| description | Low-grade metamorphic rock (LMR) is a kind of stone that is widely distributed in China. The alkali activity strictly prevents its application in conventional concrete. This paper evaluates the possibility of using LMR aggregate in cement-stabilized pavement base (CSPB). The compressive strength of CSPB prepared with LMR and limestone aggregates at various curing conditions was measured. Expansion rates were determined via accelerated simulation tests to assess the alkali reactivity of LMR, followed by microscopic analysis. Finally, the possibility of using LMR in CSPB was evaluated from the economic viewpoint. Results indicate that CSPB specimens prepared with LMR have similar compressive strength at each content of cement, regardless of curing conditions. The expansion rates of all CSPB specimens with LMR were lower than 0.1%, indicating the absence of an AAR, which was further validated by the absence of the AAR product in microscopic observations. It is inferred from the economic analysis that 70.9% lower cost can be achieved by the replacement of limestone aggregate with LMR aggregate. This demonstrates that technical, economic and environmental benefits endow LMR with wide market potential as the aggregate of CSPB. |
| first_indexed | 2024-03-10T03:13:50Z |
| format | Article |
| id | doaj.art-a426ce127bd14ca4afb9cfc0a4231f02 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-10T03:13:50Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-a426ce127bd14ca4afb9cfc0a4231f022023-11-23T10:20:16ZengMDPI AGBuildings2075-53092022-05-0112558910.3390/buildings12050589Experimental Application of Cement-Stabilized Pavement Base with Low-Grade Metamorphic Rock AggregatesQian Yang0Yi Liu1Haotian Zou2Xiaoxiong Wang3Guohuan Gong4Yinnan Cheng5Liang Zhang6Zhengwu Jiang7Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, School of Materials Science and Engineering, Tongji University, Shanghai 201804, ChinaGuizhou Hongxin Chuangda Engineering Detection & Consultation Co., Ltd., Guiyang 550014, ChinaGuizhou Hongxin Chuangda Engineering Detection & Consultation Co., Ltd., Guiyang 550014, ChinaGuizhou Hongxin Chuangda Engineering Detection & Consultation Co., Ltd., Guiyang 550014, ChinaGuizhou Hongxin Chuangda Engineering Detection & Consultation Co., Ltd., Guiyang 550014, ChinaGuizhou Hongxin Chuangda Engineering Detection & Consultation Co., Ltd., Guiyang 550014, ChinaGuizhou Transportation Planning Survey & Design Academe Co., Ltd., Guiyang 550081, ChinaKey Laboratory of Advanced Civil Engineering Materials of Ministry of Education, School of Materials Science and Engineering, Tongji University, Shanghai 201804, ChinaLow-grade metamorphic rock (LMR) is a kind of stone that is widely distributed in China. The alkali activity strictly prevents its application in conventional concrete. This paper evaluates the possibility of using LMR aggregate in cement-stabilized pavement base (CSPB). The compressive strength of CSPB prepared with LMR and limestone aggregates at various curing conditions was measured. Expansion rates were determined via accelerated simulation tests to assess the alkali reactivity of LMR, followed by microscopic analysis. Finally, the possibility of using LMR in CSPB was evaluated from the economic viewpoint. Results indicate that CSPB specimens prepared with LMR have similar compressive strength at each content of cement, regardless of curing conditions. The expansion rates of all CSPB specimens with LMR were lower than 0.1%, indicating the absence of an AAR, which was further validated by the absence of the AAR product in microscopic observations. It is inferred from the economic analysis that 70.9% lower cost can be achieved by the replacement of limestone aggregate with LMR aggregate. This demonstrates that technical, economic and environmental benefits endow LMR with wide market potential as the aggregate of CSPB.https://www.mdpi.com/2075-5309/12/5/589alkali–aggregate reactionlow-grade metamorphic rockcement-stabilized pavement basestrengthmicrostructure |
| spellingShingle | Qian Yang Yi Liu Haotian Zou Xiaoxiong Wang Guohuan Gong Yinnan Cheng Liang Zhang Zhengwu Jiang Experimental Application of Cement-Stabilized Pavement Base with Low-Grade Metamorphic Rock Aggregates Buildings alkali–aggregate reaction low-grade metamorphic rock cement-stabilized pavement base strength microstructure |
| title | Experimental Application of Cement-Stabilized Pavement Base with Low-Grade Metamorphic Rock Aggregates |
| title_full | Experimental Application of Cement-Stabilized Pavement Base with Low-Grade Metamorphic Rock Aggregates |
| title_fullStr | Experimental Application of Cement-Stabilized Pavement Base with Low-Grade Metamorphic Rock Aggregates |
| title_full_unstemmed | Experimental Application of Cement-Stabilized Pavement Base with Low-Grade Metamorphic Rock Aggregates |
| title_short | Experimental Application of Cement-Stabilized Pavement Base with Low-Grade Metamorphic Rock Aggregates |
| title_sort | experimental application of cement stabilized pavement base with low grade metamorphic rock aggregates |
| topic | alkali–aggregate reaction low-grade metamorphic rock cement-stabilized pavement base strength microstructure |
| url | https://www.mdpi.com/2075-5309/12/5/589 |
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