Laboratory Investigation into Early-Age Strength Improvement of Cold Recycled Asphalt Mixture Containing Asphalt Emulsion and Cement
Cold recycled asphalt mixture (CRAM) has been reported to be able to provide a cleaner method to rehabilitate damaged asphalt pavement. This work used the CRAM containing emulsified asphalt (AE) and cement to investigate the methods of improving its early-age strength by considering mixture composit...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/7274204 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832554588910125056 |
|---|---|
| author | Yinfei Du Lingxiang Kong Tangzhong Wei |
| author_facet | Yinfei Du Lingxiang Kong Tangzhong Wei |
| author_sort | Yinfei Du |
| collection | DOAJ |
| description | Cold recycled asphalt mixture (CRAM) has been reported to be able to provide a cleaner method to rehabilitate damaged asphalt pavement. This work used the CRAM containing emulsified asphalt (AE) and cement to investigate the methods of improving its early-age strength by considering mixture composition, including the types of AE and cement and the contents of AE, cement, and moisture. The curing conditions, such as temperature and humidity, were also involved. The results show that the mixture should be carefully designed to determine optimum AE and moisture content. Also, high cement content was helpful to increase the early-age strength. By changing the curing environment, it was found that raising curing temperature and applying a relatively low humidity contributed to the early-age strength improvement. The interaction of cement hydration and AE demulsification was investigated using microimage and laboratory experiments. The results show that AE particles were easy to cluster because of the negative ions released by cement hydration. AE delayed the early cement hydration but improved the later intensity of cement hydration. The coupling effect of AE and cement resulted in higher early-age strength than those of the mixtures only with cement or only with AE. The results presented in this work are expected to give guidance for preparing a CRAM with high early-age strength. |
| format | Article |
| id | doaj-art-b0e36267d8a345a7b755408dd3c5ff78 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-b0e36267d8a345a7b755408dd3c5ff782025-02-03T05:51:04ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/72742047274204Laboratory Investigation into Early-Age Strength Improvement of Cold Recycled Asphalt Mixture Containing Asphalt Emulsion and CementYinfei Du0Lingxiang Kong1Tangzhong Wei2School of Civil Engineering, Central South University, Changsha 410075, ChinaKey Laboratory of Traffic Safety on Track, Ministry of Education, School of Traffic and Transportation Engineering, Central South University, Changsha 410075, ChinaNanjing Xingyou Transportation Technology Co. Ltd., Nanjing 211100, ChinaCold recycled asphalt mixture (CRAM) has been reported to be able to provide a cleaner method to rehabilitate damaged asphalt pavement. This work used the CRAM containing emulsified asphalt (AE) and cement to investigate the methods of improving its early-age strength by considering mixture composition, including the types of AE and cement and the contents of AE, cement, and moisture. The curing conditions, such as temperature and humidity, were also involved. The results show that the mixture should be carefully designed to determine optimum AE and moisture content. Also, high cement content was helpful to increase the early-age strength. By changing the curing environment, it was found that raising curing temperature and applying a relatively low humidity contributed to the early-age strength improvement. The interaction of cement hydration and AE demulsification was investigated using microimage and laboratory experiments. The results show that AE particles were easy to cluster because of the negative ions released by cement hydration. AE delayed the early cement hydration but improved the later intensity of cement hydration. The coupling effect of AE and cement resulted in higher early-age strength than those of the mixtures only with cement or only with AE. The results presented in this work are expected to give guidance for preparing a CRAM with high early-age strength.http://dx.doi.org/10.1155/2019/7274204 |
| spellingShingle | Yinfei Du Lingxiang Kong Tangzhong Wei Laboratory Investigation into Early-Age Strength Improvement of Cold Recycled Asphalt Mixture Containing Asphalt Emulsion and Cement Advances in Civil Engineering |
| title | Laboratory Investigation into Early-Age Strength Improvement of Cold Recycled Asphalt Mixture Containing Asphalt Emulsion and Cement |
| title_full | Laboratory Investigation into Early-Age Strength Improvement of Cold Recycled Asphalt Mixture Containing Asphalt Emulsion and Cement |
| title_fullStr | Laboratory Investigation into Early-Age Strength Improvement of Cold Recycled Asphalt Mixture Containing Asphalt Emulsion and Cement |
| title_full_unstemmed | Laboratory Investigation into Early-Age Strength Improvement of Cold Recycled Asphalt Mixture Containing Asphalt Emulsion and Cement |
| title_short | Laboratory Investigation into Early-Age Strength Improvement of Cold Recycled Asphalt Mixture Containing Asphalt Emulsion and Cement |
| title_sort | laboratory investigation into early age strength improvement of cold recycled asphalt mixture containing asphalt emulsion and cement |
| url | http://dx.doi.org/10.1155/2019/7274204 |
| work_keys_str_mv | AT yinfeidu laboratoryinvestigationintoearlyagestrengthimprovementofcoldrecycledasphaltmixturecontainingasphaltemulsionandcement AT lingxiangkong laboratoryinvestigationintoearlyagestrengthimprovementofcoldrecycledasphaltmixturecontainingasphaltemulsionandcement AT tangzhongwei laboratoryinvestigationintoearlyagestrengthimprovementofcoldrecycledasphaltmixturecontainingasphaltemulsionandcement |