Long-Term Performance of Soybean-Based Concrete Surface Protectant under Laboratory Accelerated Aging Conditions
Soy methyl ester-polystyrene (SME-PS) is an organic material derived from soybeans, which has proven to be an effective protectant for concrete surfaces. This study investigated the long-term performance of cement paste samples treated with SME-PS under laboratory accelerated aging conditions (AAC). The specimens were subjected to cyclic conditions: 8?h of UVA radiation (simulating solar radiation), followed by 6?h of darkness with water condensation and a high temperature of 40°C for 28?days. After the AAC exposure, the samples were immersed in a deicing salt solution, specifically a 29.8?wt. % calcium chloride solution, for 7?days. To evaluate the long-term behavior of SME-PS, a series of experiments, including visual observation, thermogravimetric analysis (TGA), and low-temperature differential scanning calorimetry (LT-DSC) was conducted. Visual observations revealed slight damage in SME-PS-treated samples after AAC exposure, while control samples experienced microcrack formations. SME-PS chemical compositions remained unaffected by AAC, in contrast to the control samples where a decrease in the quantity of calcium hydroxide and an increase in calcium carbonate content were observed as a result of carbonation during AAC exposure. LT-DSC results indicated that SME-PS-treated samples showed a significant reduction in the enthalpy of fusion associated with calcium oxychloride (CAOXY) formation, indicating that the SME-PS remained effective after AAC exposure, while control samples exhibited higher CAOXY enthalpy of fusion.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
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Supplemental Notes:
- Mohammad Houshmand Khaneghahi https://orcid.org/0000-0001-5230-0214© National Academy of Sciences: Transportation Research Board 2024.
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Authors:
- Houshmand Khaneghahi, Mohammad
- 0000-0001-5230-0214
- Mutua, Angela
- He, Jialuo
- 0000-0002-1295-937X
- Mishra, Geetika
- (Amir) Farnam, Yaghoob
- 0000-0002-0865-2156
- Publication Date: 2024-8
Language
- English
Media Info
- Media Type: Web
- Features: References;
- Pagination: pp 470-481
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Serial:
- Transportation Research Record: Journal of the Transportation Research Board
- Volume: 2678
- Issue Number: 8
- Publisher: Sage Publications, Incorporated
- ISSN: 0361-1981
- EISSN: 2169-4052
- Serial URL: http://journals.sagepub.com/home/trr
Subject/Index Terms
- TRT Terms: Accelerated tests; Aging (Materials); Cement paste; Concrete structures; Protective coatings; Soybeans
- Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation; Materials;
Filing Info
- Accession Number: 01904281
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Jan 8 2024 12:21PM