Experimental Investigation of Neutralisation of Concrete with Fly Ash as Fine Aggregate in Freeze-Thaw Environment
To study the durability of concrete with fly ash as fine aggregate under alternate freeze-thaw and carbonation, freeze-thaw and carbonation cyclic tests are conducted to explore variation characteristics such as relative dynamic modulus of elasticity and neutralisation depth. The influence coefficie...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/6860293 |
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| author | Dongsheng Zhang Mingjie Mao Qiuning Yang Wenbo Zhang Pengfei Han |
| author_facet | Dongsheng Zhang Mingjie Mao Qiuning Yang Wenbo Zhang Pengfei Han |
| author_sort | Dongsheng Zhang |
| collection | DOAJ |
| description | To study the durability of concrete with fly ash as fine aggregate under alternate freeze-thaw and carbonation, freeze-thaw and carbonation cyclic tests are conducted to explore variation characteristics such as relative dynamic modulus of elasticity and neutralisation depth. The influence coefficient (λC) of carbonation on concrete freeze-thaw damage and the influence coefficient (λF) of freeze-thaw on concrete neutralisation are introduced. In addition, scanning electron microscopy is performed to reveal the deterioration mechanism of the alternating effect. Finally, through a regression analysis of test data, the mathematical expression of the composite damage coefficient kF under alternate freeze-thaw and carbonation is obtained. Based on these findings, a prediction model of the neutralisation depth of concrete is established with number of freeze-thaw cycles and water-cement ratio as parameters. The values calculated through this model and the values measured in the tests are highly correlated. This provides a theoretical reference and basis for the analysis of concrete durability in a multifactor environment. |
| format | Article |
| id | doaj-art-ca457a79fbd94c3cb874bb56b7865fc5 |
| institution | DOAJ |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-ca457a79fbd94c3cb874bb56b7865fc52025-08-20T03:19:43ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/68602936860293Experimental Investigation of Neutralisation of Concrete with Fly Ash as Fine Aggregate in Freeze-Thaw EnvironmentDongsheng Zhang0Mingjie Mao1Qiuning Yang2Wenbo Zhang3Pengfei Han4School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, ChinaSchool of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, ChinaSchool of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, ChinaSchool of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, ChinaSchool of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, ChinaTo study the durability of concrete with fly ash as fine aggregate under alternate freeze-thaw and carbonation, freeze-thaw and carbonation cyclic tests are conducted to explore variation characteristics such as relative dynamic modulus of elasticity and neutralisation depth. The influence coefficient (λC) of carbonation on concrete freeze-thaw damage and the influence coefficient (λF) of freeze-thaw on concrete neutralisation are introduced. In addition, scanning electron microscopy is performed to reveal the deterioration mechanism of the alternating effect. Finally, through a regression analysis of test data, the mathematical expression of the composite damage coefficient kF under alternate freeze-thaw and carbonation is obtained. Based on these findings, a prediction model of the neutralisation depth of concrete is established with number of freeze-thaw cycles and water-cement ratio as parameters. The values calculated through this model and the values measured in the tests are highly correlated. This provides a theoretical reference and basis for the analysis of concrete durability in a multifactor environment.http://dx.doi.org/10.1155/2019/6860293 |
| spellingShingle | Dongsheng Zhang Mingjie Mao Qiuning Yang Wenbo Zhang Pengfei Han Experimental Investigation of Neutralisation of Concrete with Fly Ash as Fine Aggregate in Freeze-Thaw Environment Advances in Civil Engineering |
| title | Experimental Investigation of Neutralisation of Concrete with Fly Ash as Fine Aggregate in Freeze-Thaw Environment |
| title_full | Experimental Investigation of Neutralisation of Concrete with Fly Ash as Fine Aggregate in Freeze-Thaw Environment |
| title_fullStr | Experimental Investigation of Neutralisation of Concrete with Fly Ash as Fine Aggregate in Freeze-Thaw Environment |
| title_full_unstemmed | Experimental Investigation of Neutralisation of Concrete with Fly Ash as Fine Aggregate in Freeze-Thaw Environment |
| title_short | Experimental Investigation of Neutralisation of Concrete with Fly Ash as Fine Aggregate in Freeze-Thaw Environment |
| title_sort | experimental investigation of neutralisation of concrete with fly ash as fine aggregate in freeze thaw environment |
| url | http://dx.doi.org/10.1155/2019/6860293 |
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