Chloride diffusion models for plain and blended cement concretes exposed to laboratory and atmospheric marine conditions
Chloride-induced corrosion of steel in a reinforced concrete structure compromises its safety and may decrease the designed service-life. The initiation and the rate of reinforcement corrosion mainly depends on the diffusion of chloride ions to the surface of the steel bars. As such, it is important...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785421015799 |
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| author | Khaled A.Alawi Al-Sodani Mesfer Mohammad Al-Zahrani Mohammed Maslehuddin Omar S.Baghabra Al-Amoudi Salah U. Al-Dulaijan |
| author_facet | Khaled A.Alawi Al-Sodani Mesfer Mohammad Al-Zahrani Mohammed Maslehuddin Omar S.Baghabra Al-Amoudi Salah U. Al-Dulaijan |
| author_sort | Khaled A.Alawi Al-Sodani |
| collection | DOAJ |
| description | Chloride-induced corrosion of steel in a reinforced concrete structure compromises its safety and may decrease the designed service-life. The initiation and the rate of reinforcement corrosion mainly depends on the diffusion of chloride ions to the surface of the steel bars. As such, it is important to determine the coefficient of apparent chloride diffusion (Da) for the type of concrete to be used in a structure, which is time-consuming. Therefore, the development of a short-term and simple procedure to predict Da is highly desirable. This study was conducted to develop a correlation between the short-term chloride migration coefficient (Dnssm) and long-term Da for Type I, Type V and pozzolanic cement concretes. Two groups of concrete specimens, each consisting of five concrete mixtures designed with a w/b ratio of 0.4, were prepared. The first group was exposed to a marine exposure site for 10 years and Da was evaluated after 1, 2, 5 and 10 years. The second group was tested according to NT BUILD 492 under laboratory conditions to determine the short-term Dnssm. Correlation models between the field and laboratory results were developed and statistically validated by comparing the predicted values with the measured ones. The predicted Da values are within ±7% of the measured values. Further, the Dnssm of pozzolanic cement concretes is 2.20–4.40 and 3.55 to 7.30 times less than that of Type I and Type V cement concretes, respectively. The developed models can be utilized to assess the long-term Da by determining the short-term Dnssm. |
| first_indexed | 2024-12-18T11:17:35Z |
| format | Article |
| id | doaj.art-1025b23765f847c79258df1645afc8b7 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-18T11:17:35Z |
| publishDate | 2022-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-1025b23765f847c79258df1645afc8b72022-12-21T21:09:54ZengElsevierJournal of Materials Research and Technology2238-78542022-03-0117125138Chloride diffusion models for plain and blended cement concretes exposed to laboratory and atmospheric marine conditionsKhaled A.Alawi Al-Sodani0Mesfer Mohammad Al-Zahrani1Mohammed Maslehuddin2Omar S.Baghabra Al-Amoudi3Salah U. Al-Dulaijan4Department of Civil Engineering, University of Hafr Al-Batin, Hafr Al-Batin, 31991, Saudi ArabiaDepartment of Civil and Environmental Engineering, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia; Interdisciplinary Research Center for Construction and Building Materials, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia; Corresponding author.Interdisciplinary Research Center for Construction and Building Materials, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi ArabiaDepartment of Civil and Environmental Engineering, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia; Interdisciplinary Research Center for Construction and Building Materials, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi ArabiaDepartment of Civil and Environmental Engineering, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia; Interdisciplinary Research Center for Construction and Building Materials, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi ArabiaChloride-induced corrosion of steel in a reinforced concrete structure compromises its safety and may decrease the designed service-life. The initiation and the rate of reinforcement corrosion mainly depends on the diffusion of chloride ions to the surface of the steel bars. As such, it is important to determine the coefficient of apparent chloride diffusion (Da) for the type of concrete to be used in a structure, which is time-consuming. Therefore, the development of a short-term and simple procedure to predict Da is highly desirable. This study was conducted to develop a correlation between the short-term chloride migration coefficient (Dnssm) and long-term Da for Type I, Type V and pozzolanic cement concretes. Two groups of concrete specimens, each consisting of five concrete mixtures designed with a w/b ratio of 0.4, were prepared. The first group was exposed to a marine exposure site for 10 years and Da was evaluated after 1, 2, 5 and 10 years. The second group was tested according to NT BUILD 492 under laboratory conditions to determine the short-term Dnssm. Correlation models between the field and laboratory results were developed and statistically validated by comparing the predicted values with the measured ones. The predicted Da values are within ±7% of the measured values. Further, the Dnssm of pozzolanic cement concretes is 2.20–4.40 and 3.55 to 7.30 times less than that of Type I and Type V cement concretes, respectively. The developed models can be utilized to assess the long-term Da by determining the short-term Dnssm.http://www.sciencedirect.com/science/article/pii/S2238785421015799Plain and blended cement concreteCorrelation modelsChloride diffusionMarine exposureLaboratory assessment |
| spellingShingle | Khaled A.Alawi Al-Sodani Mesfer Mohammad Al-Zahrani Mohammed Maslehuddin Omar S.Baghabra Al-Amoudi Salah U. Al-Dulaijan Chloride diffusion models for plain and blended cement concretes exposed to laboratory and atmospheric marine conditions Journal of Materials Research and Technology Plain and blended cement concrete Correlation models Chloride diffusion Marine exposure Laboratory assessment |
| title | Chloride diffusion models for plain and blended cement concretes exposed to laboratory and atmospheric marine conditions |
| title_full | Chloride diffusion models for plain and blended cement concretes exposed to laboratory and atmospheric marine conditions |
| title_fullStr | Chloride diffusion models for plain and blended cement concretes exposed to laboratory and atmospheric marine conditions |
| title_full_unstemmed | Chloride diffusion models for plain and blended cement concretes exposed to laboratory and atmospheric marine conditions |
| title_short | Chloride diffusion models for plain and blended cement concretes exposed to laboratory and atmospheric marine conditions |
| title_sort | chloride diffusion models for plain and blended cement concretes exposed to laboratory and atmospheric marine conditions |
| topic | Plain and blended cement concrete Correlation models Chloride diffusion Marine exposure Laboratory assessment |
| url | http://www.sciencedirect.com/science/article/pii/S2238785421015799 |
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