改性聚丙烯纤维增强水泥基材料的搅拌工艺及弯曲性能研究

吕浩平; 李艳杰; 郝元灏; 朱崇绩; 刘世玺

doi:10.13204/j.gyjzG22042524

改性聚丙烯纤维增强水泥基材料的搅拌工艺及弯曲性能研究

doi: 10.13204/j.gyjzG22042524

济南大学土木建筑学院, 济南 250022

详细信息

作者简介:
吕浩平,男,1997年出生,硕士。

通讯作者:
李艳杰,cea_liyj@ujn.edu.cn。

计量
- 文章访问数: 75
- HTML全文浏览量: 17
- PDF下载量: 0
- 被引次数: 0
出版历程
- 收稿日期: 2022-04-25
- 网络出版日期: 2023-05-25
- 刊出日期: 2023-02-20

Research on Mix Processes and Bending Properties of Modified Polypropylene Fiber Reinforced Cement-Based Materials

School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China

摘要

摘要: 对两类搅拌工艺(纤维先掺和后掺法)制备的改性聚丙烯纤维增强水泥基材料进行测试,研究新拌砂浆在不同搅拌时间和搅拌速率下的纤维分散性和工作性能,并对其浇筑物进行不同龄期的抗压抗折试验。基于上述试验结果确立可靠的搅拌工艺,并浇筑平板试件。通过四点弯曲试验研究改性聚丙烯纤维长度和掺量对弯曲性能的影响。研究结果表明:纤维后掺和慢速搅拌为可靠的搅拌工艺。纤维长度为12 mm时弯曲强度最大,纤维长度为20 mm时延展性、韧性和残余强度最好。在纤维长度相同时弯曲性能会随着纤维掺量的增加而增大。该研究可以为改性聚丙烯纤维制备纤维增强水泥基材料提供一定的试验依据。
- 纤维增强水泥基材料 /
- 改性聚丙烯纤维 /
- 搅拌工艺 /
- 弯曲性能
Abstract: The modified polypropylene fiber reinforced cement-based materials prepared by two kinds of mixing processes (pre-fiber mixing method and post-fiber mixing method) were tested to study the fiber dispersion and working performance of fresh mortar under different mixing times and mixing rates, and the compression test and flexural test of its castables at different ages were carried out. Based on the above test results, a reliable mixing process was established, and the flat plate specimens were poured. The effects of the length and content of modified polypropylene fibers on the bending properties were studied by four-point-bending test. The results showed that the mixing processes of post-fiber mixing method and slow mixing method were reliable.When the fiber length was 12 mm, the strength was the largest, and when the fiber length was 20 mm, the ductility, toughness and residual strength were the best. When the fiber length was the same, the bending properties would increase with the increase of fiber content. This study can provide an experimental basis for the preparing fiber-reinforced cement-based materials by modified polypropylene fibers.
- fiber reinforced cement-based materials /
- modified polypropylene fiber /
- mixing process /
- bending properties

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参考文献(17)

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