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- Title
复掺非等长玄武岩纤维的水泥土抗拉特性分析.
- Authors
沈 晨; 章定文; 张国龙; 宋 涛; 徐慧敏
- Abstract
In order to investigate the influence and strengthen mechanism of unequal length mixed basalt fiber on the tensile strength of cemented soil, fibers with length of 6,9,12 mm were selected to mixed. Uniaxial tensile test and scanning electron microscope test were carried out to investigate the variation laws and the micro-mechanism of peak tensile strength, residual tensile strength and toughness of cemented soil. The results show that the tensile stress-strain curves of cemented soil with fiber can be divided into four stages: elastic deformation stage, damage and failure stage, residual strength stage and final failure stage. During the damage and failure stage, the fiber slows down the stress loss rate of cemented soil. The peak tensile strength, residual tensile strength and toughness of cemented soil can be improved effectively by adding different lengths of basalt fiber. The peak and residual tensile strengths of cemented soil with 9 mm and 12 mm length mixed by 3:1 ratio are the highest. Fibers are overlapped and staggered in cemented soil to form a spatial network structure. The anchorage between fibers and cemented soil is the main mechanism to improve the tensile strength of cemented soil. When the fiber length is short, it is easy to be pulled out, and if the fiber length is too long, there is cluster phenomenon, which affects the enhancement effect of fiber on the tensile strength of cemented soil.
- Subjects
STRAINS &; stresses (Mechanics); TENSILE strength; STRESS-strain curves; SCANNING electron microscopes; TENSILE tests
- Publication
Journal of Architecture & Civil Engineering, 2021, Vol 38, Issue 6, p33
- ISSN
1673-2049
- Publication type
Article
- DOI
10.19815/j.jace.2021.09022