Study on desorption characteristics of water vapor in fly ash concrete materials
In this paper, water vapor desorption tests are carried out on water-saturated concrete materials with different water-binder ratios and fly ash content. The desorption parameters are analyzed using the adsorption curve analysis method, which enables the acquisition of desorption characteristics for...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509524002547 |
| _version_ | 1797220569523945472 |
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| author | Lianjuan Miao Ming Wen Chujie Jiao Songsong He Xinchun Guan |
| author_facet | Lianjuan Miao Ming Wen Chujie Jiao Songsong He Xinchun Guan |
| author_sort | Lianjuan Miao |
| collection | DOAJ |
| description | In this paper, water vapor desorption tests are carried out on water-saturated concrete materials with different water-binder ratios and fly ash content. The desorption parameters are analyzed using the adsorption curve analysis method, which enables the acquisition of desorption characteristics for concrete materials. By utilizing the desorption isothermal curve, the desorption rate is calculated and further analysis is conducted on the influence of water-binder ratio and fly ash content on this rate. The results indicate that the desorption and activation energy for water vapor desorption in concrete materials is higher than the adsorption energy at the first layer, suggesting that removing water vapor from inner pore walls is more challenging than its adsorption. The amount of water vapor released from concrete materials follows a power function over time, as does the rate of desorption. Under conditions of relatively low ambient humidity, an increase in the water-binder ratio leads to a decrease in the rate of desorption. Conversely, under relatively high ambient humidity, an increase in the water-binder ratio results in an increased rate of desorption. |
| first_indexed | 2024-04-24T12:51:38Z |
| format | Article |
| id | doaj.art-f09751f2e38642bc950ede4bbdacf64b |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-04-24T12:51:38Z |
| publishDate | 2024-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-f09751f2e38642bc950ede4bbdacf64b2024-04-06T04:39:56ZengElsevierCase Studies in Construction Materials2214-50952024-07-0120e03103Study on desorption characteristics of water vapor in fly ash concrete materialsLianjuan Miao0Ming Wen1Chujie Jiao2Songsong He3Xinchun Guan4School of Civil Engineering, Guangzhou University, Guangzhou 510006, China; Corresponding author.School of Civil Engineering and Architecture, Wuyi University, Jiangmen 529000, ChinaSchool of Civil Engineering, Guangzhou University, Guangzhou 510006, ChinaSchool of Civil Engineering, Guangzhou University, Guangzhou 510006, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Harbin, ChinaIn this paper, water vapor desorption tests are carried out on water-saturated concrete materials with different water-binder ratios and fly ash content. The desorption parameters are analyzed using the adsorption curve analysis method, which enables the acquisition of desorption characteristics for concrete materials. By utilizing the desorption isothermal curve, the desorption rate is calculated and further analysis is conducted on the influence of water-binder ratio and fly ash content on this rate. The results indicate that the desorption and activation energy for water vapor desorption in concrete materials is higher than the adsorption energy at the first layer, suggesting that removing water vapor from inner pore walls is more challenging than its adsorption. The amount of water vapor released from concrete materials follows a power function over time, as does the rate of desorption. Under conditions of relatively low ambient humidity, an increase in the water-binder ratio leads to a decrease in the rate of desorption. Conversely, under relatively high ambient humidity, an increase in the water-binder ratio results in an increased rate of desorption.http://www.sciencedirect.com/science/article/pii/S2214509524002547ConcreteWater-binder ratioFly ashWater vaporDesorption |
| spellingShingle | Lianjuan Miao Ming Wen Chujie Jiao Songsong He Xinchun Guan Study on desorption characteristics of water vapor in fly ash concrete materials Case Studies in Construction Materials Concrete Water-binder ratio Fly ash Water vapor Desorption |
| title | Study on desorption characteristics of water vapor in fly ash concrete materials |
| title_full | Study on desorption characteristics of water vapor in fly ash concrete materials |
| title_fullStr | Study on desorption characteristics of water vapor in fly ash concrete materials |
| title_full_unstemmed | Study on desorption characteristics of water vapor in fly ash concrete materials |
| title_short | Study on desorption characteristics of water vapor in fly ash concrete materials |
| title_sort | study on desorption characteristics of water vapor in fly ash concrete materials |
| topic | Concrete Water-binder ratio Fly ash Water vapor Desorption |
| url | http://www.sciencedirect.com/science/article/pii/S2214509524002547 |
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