Effect of PVA Fibers Dispersion on Mechanical Properties of Cement Mortar and Cement Stabilized Macadam

被引：0
|
作者：
Yuan L. [1 ,2 ]
Liang N. [2 ]
Zhao C. [3 ]
Yang Z. [2 ]
Zeng S. [4 ]
机构：
[1] Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai
[2] School of Civil Engineering, Chongqing Jiaotong University, Chongqing
[3] School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing
[4] School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2021年 / 24卷 / 05期
关键词：
Cement mortar; Cement stabilized macadam; Dispersion degree; Fracture energy; Splitting strength;
D O I：
10.3969/j.issn.1007-9629.2021.05.004
中图分类号：
学科分类号：
摘要：
In order to study the influence of the dispersion degree of polyvinyl alcohol(PVA) fibers on the properties of cement mortar and cement stabilized macadam, fly ash was used to disperse PVA fibers. Entropy analysis of the image texture of PVA fibers was carried out by the image processing method of gray level co‑occurrence matrix, and the mathematical model of single‑factor analysis of variance was established to test the significant influence of fly ash on the dispersion degree of PVA fibers, the relationship between the dispersion degree of PVA fibers and the image entropy was obtained. Then the image processing method of gray level co‑occurrence matrix was verified and analyzed by the mass‑equipartition weighing method. The relationship between the mechanical properties of the cement‑based composite material and the dispersion degree of PVA fibers were studied through laboratory experiment. The results show that the dispersion degree of PVA fibers increases with the increase of the mass ratio of fly ash and PVA fibers (abbreviated as mass ratio), when the mass ratio is greater than 50:1, the PVA fibers can be uniformly dispersed in the cement‑based composite material. The image entropy increases with the increase of mass ratio, and the coefficient of variation of fiber decreases with the increase of mass ratio. The flexural strength, fracture energy of cement mortar and splitting strength of cement stabilized macadam increase with the increase of the image entropy. Increasing the dispersion degree of PVA fibers in cement mortar and cement stabilized macadam can improve the mechanical properties of cement mortar and cement stabilized macadam. © 2021, Editorial Department of Journal of Building Materials. All right reserved.
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页码：921 / 929
页数：8
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