Mechanical properties of modified coral aggregate seawater sea-sand concrete: Experimental study and constitutive model
The use of corals, seawater, and sea-sand to prepare concrete can effectively solve the problem of raw material transportation in constructing remote sea islands and reefs. Corals have the disadvantages of high porosity, high water absorption, and low crushing strength, which adversely affect the pe...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509523002759 |
| _version_ | 1827920539609464832 |
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| author | Fei Wang Yingzhi Sun Xuanyi Xue Neng Wang Junhong Zhou Jianmin Hua |
| author_facet | Fei Wang Yingzhi Sun Xuanyi Xue Neng Wang Junhong Zhou Jianmin Hua |
| author_sort | Fei Wang |
| collection | DOAJ |
| description | The use of corals, seawater, and sea-sand to prepare concrete can effectively solve the problem of raw material transportation in constructing remote sea islands and reefs. Corals have the disadvantages of high porosity, high water absorption, and low crushing strength, which adversely affect the performance of concrete. In this study, corals were modified by a superfine cement paste, and the modified coral aggregate seawater sea-sand concrete was prepared by replacing gravel aggregates proportionally with modified coral aggregates. The cubic compressive, splitting tensile, flexural, and axial compressive properties of modified coral aggregate seawater sea-sand concrete with five aggregate replacement ratios were studied. The results showed that the coral aggregate was divided into two parts after the concrete failed. The higher the replacement ratio of the aggregates, the smoother the splitting failure surface of the concrete. The modification measures could not significantly improve the compressive and tensile strengths of coral aggregate concrete, and the increasing rate was less than 10%. The compressive strength of concrete using modified coral aggregates was approximately 30% lower than that of concrete using gravel. Based on the experimental results, a prediction model, which can simulate the compressive stress-strain relationship of coral aggregate concrete under different replacement ratios, was proposed. |
| first_indexed | 2024-03-13T04:12:04Z |
| format | Article |
| id | doaj.art-f7fcd9fd52e5401581e93cb2da1b4885 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-13T04:12:04Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-f7fcd9fd52e5401581e93cb2da1b48852023-06-21T06:54:28ZengElsevierCase Studies in Construction Materials2214-50952023-07-0118e02095Mechanical properties of modified coral aggregate seawater sea-sand concrete: Experimental study and constitutive modelFei Wang0Yingzhi Sun1Xuanyi Xue2Neng Wang3Junhong Zhou4Jianmin Hua5School of Civil Engineering, Chongqing University, Chongqing 400045, ChinaThe Third Construction Engineering Company LTD. of China Construction Second Engineering Bureau, Beijing 100070, China; China State Construction Engineering Co., Ltd., Beijing 100029, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, China; Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing 400045, China; Corresponding author at: School of Civil Engineering, Chongqing University, Chongqing 400045, China.School of Management Science and Real Estate, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, China; Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing 400045, ChinaThe use of corals, seawater, and sea-sand to prepare concrete can effectively solve the problem of raw material transportation in constructing remote sea islands and reefs. Corals have the disadvantages of high porosity, high water absorption, and low crushing strength, which adversely affect the performance of concrete. In this study, corals were modified by a superfine cement paste, and the modified coral aggregate seawater sea-sand concrete was prepared by replacing gravel aggregates proportionally with modified coral aggregates. The cubic compressive, splitting tensile, flexural, and axial compressive properties of modified coral aggregate seawater sea-sand concrete with five aggregate replacement ratios were studied. The results showed that the coral aggregate was divided into two parts after the concrete failed. The higher the replacement ratio of the aggregates, the smoother the splitting failure surface of the concrete. The modification measures could not significantly improve the compressive and tensile strengths of coral aggregate concrete, and the increasing rate was less than 10%. The compressive strength of concrete using modified coral aggregates was approximately 30% lower than that of concrete using gravel. Based on the experimental results, a prediction model, which can simulate the compressive stress-strain relationship of coral aggregate concrete under different replacement ratios, was proposed.http://www.sciencedirect.com/science/article/pii/S2214509523002759Coral aggregate concreteSeawater sea-sandCoral modificationAggregate replacementMechanical properties |
| spellingShingle | Fei Wang Yingzhi Sun Xuanyi Xue Neng Wang Junhong Zhou Jianmin Hua Mechanical properties of modified coral aggregate seawater sea-sand concrete: Experimental study and constitutive model Case Studies in Construction Materials Coral aggregate concrete Seawater sea-sand Coral modification Aggregate replacement Mechanical properties |
| title | Mechanical properties of modified coral aggregate seawater sea-sand concrete: Experimental study and constitutive model |
| title_full | Mechanical properties of modified coral aggregate seawater sea-sand concrete: Experimental study and constitutive model |
| title_fullStr | Mechanical properties of modified coral aggregate seawater sea-sand concrete: Experimental study and constitutive model |
| title_full_unstemmed | Mechanical properties of modified coral aggregate seawater sea-sand concrete: Experimental study and constitutive model |
| title_short | Mechanical properties of modified coral aggregate seawater sea-sand concrete: Experimental study and constitutive model |
| title_sort | mechanical properties of modified coral aggregate seawater sea sand concrete experimental study and constitutive model |
| topic | Coral aggregate concrete Seawater sea-sand Coral modification Aggregate replacement Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2214509523002759 |
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