| 改性橡胶混凝土的力学性能和抗冻融性能研究 |
| Study on Mechanical Properties and Freeze-thaw Resistance of Modified Rubber Concrete |
| 投稿时间：2022-02-09 修订日期：2022-02-09 |
| DOI：10.12136/j.issn.1000-890X.2023.02.0091 |
| 中文关键词: 橡胶混凝土 聚丙烯纤维 粉煤灰 力学性能 抗冻融性能 |
| 英文关键词: rubber concrete polypropylene fiber fly ash mechanical properties freeze-thaw resistance |
| 基金项目: |
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| 中文摘要: |
| 在橡胶混凝土中复掺聚丙烯纤维和粉煤灰，研究其掺量对橡胶混凝土力学性能和抗冻融性能的影响。结果表明：橡胶混凝土的抗压强度和抗拉强度均随聚丙烯纤维掺量的增大先增大后减小，随粉煤灰掺量的增大而呈减小的趋势；在整个冻融循环进程中，复掺聚丙烯纤维和粉煤灰橡胶混凝土的相对动弹性模量降幅小于素橡胶混凝土，抗冻融损伤能力提高；在本试验聚丙烯纤维和粉煤灰掺量范围内，聚丙烯纤维掺量为10 kg·m-3、粉煤灰掺量（以替代水泥的质量百分比计）为14%～16%时，橡胶混凝土的综合性能最优。 |
| 英文摘要: |
| 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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