Performance Evaluation of Silane in Concrete Bridge Decks Using Transmission X-ray Microscopy
The corrosion of steel reinforcement in concrete structures is a most widespread problem. Silane is commonly used as a surface treatment material to reduce the entry of moisture containing harmful chemicals into the concrete matrix, thereby restricting corrosion. There is not a standard test method...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/5/2557 |
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| author | Amir Behravan Syed Muhammad Aqib Norbert J. Delatte M. Tyler Ley Anna Rywelski |
| author_facet | Amir Behravan Syed Muhammad Aqib Norbert J. Delatte M. Tyler Ley Anna Rywelski |
| author_sort | Amir Behravan |
| collection | DOAJ |
| description | The corrosion of steel reinforcement in concrete structures is a most widespread problem. Silane is commonly used as a surface treatment material to reduce the entry of moisture containing harmful chemicals into the concrete matrix, thereby restricting corrosion. There is not a standard test method to evaluate the long-term performance of such sealers when applied on concrete. Moreover, the literature does not have a definitive conclusion on the performance of silanes. In this work, transmission X-ray microscopy (TXM) and optical imaging were used to investigate the mass transport properties and silane thickness of field samples treated with silane to gain insight into the performance of silane coatings. Quantitative measurements using optical staining techniques showed that the average measured silane thickness for all 14 projects was 2.5 mm. The TXM results revealed that, on average, the samples with silane coatings exhibited 8.5 times less penetration of outside chemicals, at a depth of 2 mm, as compared to uncracked samples without silane coatings. This work shows that silanes are a useful and practical tool to significantly reduce the permeability of in-service concrete and resist corrosion. |
| first_indexed | 2024-03-09T20:47:36Z |
| format | Article |
| id | doaj.art-594edbdcec9d4ad49793235da1a8bc72 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T20:47:36Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-594edbdcec9d4ad49793235da1a8bc722023-11-23T22:42:44ZengMDPI AGApplied Sciences2076-34172022-02-01125255710.3390/app12052557Performance Evaluation of Silane in Concrete Bridge Decks Using Transmission X-ray MicroscopyAmir Behravan0Syed Muhammad Aqib1Norbert J. Delatte2M. Tyler Ley3Anna Rywelski4Charles E. Via, Jr. Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USADepartment of Civil and Environmental Engineering, University of Tennessee, Knoxville, TN 37996, USADepartment of Civil and Environmental Engineering, Oklahoma State University, Stillwater, OK 74078, USADepartment of Civil and Environmental Engineering, Oklahoma State University, Stillwater, OK 74078, USADepartment of Civil and Environmental Engineering, Oklahoma State University, Stillwater, OK 74078, USAThe corrosion of steel reinforcement in concrete structures is a most widespread problem. Silane is commonly used as a surface treatment material to reduce the entry of moisture containing harmful chemicals into the concrete matrix, thereby restricting corrosion. There is not a standard test method to evaluate the long-term performance of such sealers when applied on concrete. Moreover, the literature does not have a definitive conclusion on the performance of silanes. In this work, transmission X-ray microscopy (TXM) and optical imaging were used to investigate the mass transport properties and silane thickness of field samples treated with silane to gain insight into the performance of silane coatings. Quantitative measurements using optical staining techniques showed that the average measured silane thickness for all 14 projects was 2.5 mm. The TXM results revealed that, on average, the samples with silane coatings exhibited 8.5 times less penetration of outside chemicals, at a depth of 2 mm, as compared to uncracked samples without silane coatings. This work shows that silanes are a useful and practical tool to significantly reduce the permeability of in-service concrete and resist corrosion.https://www.mdpi.com/2076-3417/12/5/2557silane treatmenthydrophobic coatingconcretemass transportdurabilitychloride |
| spellingShingle | Amir Behravan Syed Muhammad Aqib Norbert J. Delatte M. Tyler Ley Anna Rywelski Performance Evaluation of Silane in Concrete Bridge Decks Using Transmission X-ray Microscopy Applied Sciences silane treatment hydrophobic coating concrete mass transport durability chloride |
| title | Performance Evaluation of Silane in Concrete Bridge Decks Using Transmission X-ray Microscopy |
| title_full | Performance Evaluation of Silane in Concrete Bridge Decks Using Transmission X-ray Microscopy |
| title_fullStr | Performance Evaluation of Silane in Concrete Bridge Decks Using Transmission X-ray Microscopy |
| title_full_unstemmed | Performance Evaluation of Silane in Concrete Bridge Decks Using Transmission X-ray Microscopy |
| title_short | Performance Evaluation of Silane in Concrete Bridge Decks Using Transmission X-ray Microscopy |
| title_sort | performance evaluation of silane in concrete bridge decks using transmission x ray microscopy |
| topic | silane treatment hydrophobic coating concrete mass transport durability chloride |
| url | https://www.mdpi.com/2076-3417/12/5/2557 |
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