| 摘要: |
| 研究了3种短切纤维（聚丙烯纤维PPF，聚乙烯醇纤维PVAF和玻璃纤维GF）掺量及长度对透水混凝土力学性能和透水性能的影响.结果表明：随着PPF长度的增大，透水混凝土的抗压强度先增大后减小，当PPF长度为12mm时，不同掺量的PPF均使透水混凝土的抗压强度低于空白对照组；透水混凝土的抗折强度随PPF长度和掺量的增大而增大；PPF的掺入导致透水混凝土的空隙率和透水系数减小；当掺入长度为6mm的PVAF时，透水混凝土的抗压强度和抗折强度均得以提高，但掺入长度为6mm的GF时，透水混凝土的抗压强度降低；PVAF和GF的掺入均降低了透水混凝土的空隙率和透水系数. |
| 关键词: 透水混凝土 短切纤维种类 掺量 长度 聚丙烯纤维 |
| DOI：103969/j.issn.1007 9629201902016 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51678442,51578412） |
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| Effect of Chopped Fibers on the Performance of Pervious Concrete |
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ZHAO Jianfeng, YANG Xiaojie, LI Haoxin, MA Yiping
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School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
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| Abstract: |
| Influence of different types of chopped fiber (polypropylene fiber（PPF）, polyvinyl alcohol fiber（PVAF） and glass fiber（GF）) dosages and lengths on mechanical properties and permeability properties of pervious concrete was studied. With the increase of PPF length, compressive strength increases firstly and then decreases. When length is 12mm, compressive strength of pervious concrete with different PPF dosages are lower than control group. Flexural strength increases with the increase of PPF length or dosage. Adding PPF results in the decline of porosity and permeability coefficient. When concrete is mixed with 6mm long PVAF, compressive strength and flexural strength are improved. While 6mm long GF is added, compressive strength decreases. Moreover, PVAF and GF both lead to decrease of porosity and permeability coefficient. |
| Key words: pervious concrete chopped fiber type dosage length polypropylene fiber(PPF) |
