Laboratory Evaluation on Performance of Compound-Modified Asphalt for Rock Asphalt/Styrene–Butadiene Rubber (SBR) and Rock Asphalt/Nano-CaCO3
As a natural modifier of asphalt, rock asphalt has been widely used to improve its thermal stability and aging resistance. However, the thermal cracking resistance of asphalt modified by rock asphalt is unsatisfactory. In order to improve the thermal cracking resistance in low temperature, two kinds...
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| Format: | Article |
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MDPI AG
2018-06-01
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| Series: | Applied Sciences |
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| Online Access: | http://www.mdpi.com/2076-3417/8/6/1009 |
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| author | Songtao Lv Shuangshuang Wang Tong Guo Chengdong Xia Jianglong Li Gui Hou |
| author_facet | Songtao Lv Shuangshuang Wang Tong Guo Chengdong Xia Jianglong Li Gui Hou |
| author_sort | Songtao Lv |
| collection | DOAJ |
| description | As a natural modifier of asphalt, rock asphalt has been widely used to improve its thermal stability and aging resistance. However, the thermal cracking resistance of asphalt modified by rock asphalt is unsatisfactory. In order to improve the thermal cracking resistance in low temperature, two kinds of modifiers—styrene–butadiene rubber (SBR) and nano-CaCO3—were selected as the compound modifiers, and then implemented to improve the low-temperature performance of the binder. Then, compound asphalt modified by Buton rock asphalt (BRA) was chosen as the study subject. The thermal stability and aging resistance of asphalt modified by BRA, compound-modified asphalt by BRA/SBR, and compound-modified asphalt by BRA and nano-CaCO3 were determined to identify whether the compound modifiers in the asphalt would have a negative effect on the thermal stability and aging resistance of the asphalt. The dynamic shear rheometer (DSR) test was employed to evaluate the thermal stability. The thin film oven test (TFOT) and pressure aging vessel (PAV) were adopted to determine the aging resistance. The viscoelastic characteristics of asphalt with and without modifiers were revealed to evaluate the low-temperature crack resistance of asphalt modified by compound modifiers. The bending beam rheometer (BBR) creep test was conducted in three test temperatures in order to determine the creep stiffness modulus of the BRA compound-modified asphalt. The viscoelastic model considering the damage caused by loading was established; then, the creep compliance and parameters of the viscoelastic damage model were implemented to evaluate the low-temperature performance of the compound-modified asphalt. The results show that the compound modifiers have little negative effects on the thermal stability and aging resistance of asphalt. The thermal crack resistance of the compound-modified asphalt by BRA/SBR was the best, followed by the compound-modified asphalt by BRA and nano-CaCO3 within the three materials. The accuracy of forecasting the characteristics of compound-modified asphalt was improved by using the viscoelastic model and considering the damage effect. |
| first_indexed | 2024-04-13T02:10:09Z |
| format | Article |
| id | doaj.art-18f19c464cfb48b08cdd2574cd682d89 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-04-13T02:10:09Z |
| publishDate | 2018-06-01 |
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| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-18f19c464cfb48b08cdd2574cd682d892022-12-22T03:07:18ZengMDPI AGApplied Sciences2076-34172018-06-0186100910.3390/app8061009app8061009Laboratory Evaluation on Performance of Compound-Modified Asphalt for Rock Asphalt/Styrene–Butadiene Rubber (SBR) and Rock Asphalt/Nano-CaCO3Songtao Lv0Shuangshuang Wang1Tong Guo2Chengdong Xia3Jianglong Li4Gui Hou5National Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410004, ChinaNational Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410004, ChinaXIANDAI TOUZI Co., Ltd., Changsha 410004, ChinaNational Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410004, ChinaNational Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410004, ChinaInner Mongolia Communications Construction Engineering Quality Supervision Bureau, Hohhot 010051, ChinaAs a natural modifier of asphalt, rock asphalt has been widely used to improve its thermal stability and aging resistance. However, the thermal cracking resistance of asphalt modified by rock asphalt is unsatisfactory. In order to improve the thermal cracking resistance in low temperature, two kinds of modifiers—styrene–butadiene rubber (SBR) and nano-CaCO3—were selected as the compound modifiers, and then implemented to improve the low-temperature performance of the binder. Then, compound asphalt modified by Buton rock asphalt (BRA) was chosen as the study subject. The thermal stability and aging resistance of asphalt modified by BRA, compound-modified asphalt by BRA/SBR, and compound-modified asphalt by BRA and nano-CaCO3 were determined to identify whether the compound modifiers in the asphalt would have a negative effect on the thermal stability and aging resistance of the asphalt. The dynamic shear rheometer (DSR) test was employed to evaluate the thermal stability. The thin film oven test (TFOT) and pressure aging vessel (PAV) were adopted to determine the aging resistance. The viscoelastic characteristics of asphalt with and without modifiers were revealed to evaluate the low-temperature crack resistance of asphalt modified by compound modifiers. The bending beam rheometer (BBR) creep test was conducted in three test temperatures in order to determine the creep stiffness modulus of the BRA compound-modified asphalt. The viscoelastic model considering the damage caused by loading was established; then, the creep compliance and parameters of the viscoelastic damage model were implemented to evaluate the low-temperature performance of the compound-modified asphalt. The results show that the compound modifiers have little negative effects on the thermal stability and aging resistance of asphalt. The thermal crack resistance of the compound-modified asphalt by BRA/SBR was the best, followed by the compound-modified asphalt by BRA and nano-CaCO3 within the three materials. The accuracy of forecasting the characteristics of compound-modified asphalt was improved by using the viscoelastic model and considering the damage effect.http://www.mdpi.com/2076-3417/8/6/1009modified asphaltrock asphaltcreep testthermal crackviscoelastic model |
| spellingShingle | Songtao Lv Shuangshuang Wang Tong Guo Chengdong Xia Jianglong Li Gui Hou Laboratory Evaluation on Performance of Compound-Modified Asphalt for Rock Asphalt/Styrene–Butadiene Rubber (SBR) and Rock Asphalt/Nano-CaCO3 Applied Sciences modified asphalt rock asphalt creep test thermal crack viscoelastic model |
| title | Laboratory Evaluation on Performance of Compound-Modified Asphalt for Rock Asphalt/Styrene–Butadiene Rubber (SBR) and Rock Asphalt/Nano-CaCO3 |
| title_full | Laboratory Evaluation on Performance of Compound-Modified Asphalt for Rock Asphalt/Styrene–Butadiene Rubber (SBR) and Rock Asphalt/Nano-CaCO3 |
| title_fullStr | Laboratory Evaluation on Performance of Compound-Modified Asphalt for Rock Asphalt/Styrene–Butadiene Rubber (SBR) and Rock Asphalt/Nano-CaCO3 |
| title_full_unstemmed | Laboratory Evaluation on Performance of Compound-Modified Asphalt for Rock Asphalt/Styrene–Butadiene Rubber (SBR) and Rock Asphalt/Nano-CaCO3 |
| title_short | Laboratory Evaluation on Performance of Compound-Modified Asphalt for Rock Asphalt/Styrene–Butadiene Rubber (SBR) and Rock Asphalt/Nano-CaCO3 |
| title_sort | laboratory evaluation on performance of compound modified asphalt for rock asphalt styrene butadiene rubber sbr and rock asphalt nano caco3 |
| topic | modified asphalt rock asphalt creep test thermal crack viscoelastic model |
| url | http://www.mdpi.com/2076-3417/8/6/1009 |
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