Erosion resistance and erosion mechanism of polypropylene fiber reinforced cement composite

被引：0
|
作者：
Hao Y. [1 ,3 ,4 ]
Liu Y. [1 ,3 ,4 ]
Li Y. [2 ]
Gao F. [3 ,4 ,5 ]
机构：
[1] School of Science, Inner Mongolia University of Technology, Hohhot
[2] Fujian Key Laboratory of Novel Functional Textile Fibers and Materials, Minjiang University, Fuzhou
[3] The Inner Mongolia Key Laboratory of Civil Engineering Structure and Mechanics, Hohhot
[4] The Inner Mongolia Autonomous Region Construction Inspection and Appraisal and Safety Assessment Engineering Technology Research Center, Hohhot
[5] School of Civil Engineering, Inner Mongolia University of Technology, Hohhot
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2021年 / 38卷 / 03期
关键词：
Cement composite; Erosion mechanism; Erosion resistance; Polypropylene fiber; Sand environment;
D O I：
10.13801/j.cnki.fhclxb.20200723.006
中图分类号：
学科分类号：
摘要：
According to the characteristics of the sand environment in the middle and west regions of Inner Mongolia, the erosion resistance of polypropylene (PP) fiber/cement composites with different PP fiber contents in the sand environment was studied by using the simulated wind sand environment erosion experimental system. The micro-morphology of PP fiber/cement composites after erosion was observed by using SEM, and the erosion mechanism was explored. The results show that the erosion rates of the PP fiber/cement composites with different PP fiber contents are as follows: Cement mortar PP fiber/cement composite with mass ratio of PP fiber to cementitious is 1.5% PP fiber/cement composite with mass ratio of PP fiber to cementitious is 0.5%. Within a certain erosion time range, the evolution characteristics of erosion damage have changed significantly. The erosion rates of PP fiber/cement composites with different fiber contents increase with the erosion angle, and different peaks appear when the erosion angle is 90°, which accords with the characteristics of brittle materials. By analyzing the surface contact stress in erosion process and combined with the micro morphology after erosion, it is pointed out that the appropriate amount of PP fiber will improve the compactness and toughness of the PP fiber/cement composites. However, the addition of excessive PP fiber will cause uneven dispersion and reduce the compactness and erosion resistance of the mortar. The PP fiber/cement composites with excellent erosion resistance can be produced by matching the content of PP fiber reasonably. Copyright ©2021 Acta Materiae Compositae Sinica. All rights reserved.
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页码：891 / 901
页数：10
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