| Study on Mechanical Properties and Freeze-thaw Resistance of Modified Rubber Concrete |
| Received:February 09, 2022 Revised:February 09, 2022 |
| DOI：10.12136/j.issn.1000-890X.2023.02.0091 |
| Key Words: rubber concrete；polypropylene fiber；fly ash；mechanical properties；freeze-thaw resistance |
| Author Name | Affiliation | E-mail | | BAI Qi* | Southwest University of Science and Technology | 3090723348@qq.com | | SU Youwen | Southwest University of Science and Technology | | | LYU Xiongfei | University of Shanghai for Science and Technology | |
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| Abstract: |
| Polypropylene fiber and fly ash were mixed with rubber concrete，and the effect of their
contents on the mechanical properties and freeze-thaw resistance of rubber concrete was studied. The results
showed that the compressive strength and tensile strength of the rubber concrete first increased and then
decreased with the increase of polypropylene fiber content，and decreased with the increase of fly ash content.
In the whole freeze-thaw cycle，the relative dynamic elastic modulus of the polypropylene fiber and fly ash
filled rubber concretes decreased less than that of the unfilled rubber concrete，and the freeze-thaw damage
resistance was improved. In this test，the overall performance of the rubber concrete was the best when the
polypropylene fiber content was 10 kg·m-3 and the fly ash content was 14% ～ 16%（based on the mass
percentage of the substituted cement）. |
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