土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (6): 725-727.

• 测试技术 • 上一篇    下一篇

加筋纤维全废渣混合料的试验研究

张 巍1，2，陈建春3   

  1. (1.深圳市龙岗地质勘查局，广东深圳 518172；2.深圳市岩土综合勘察设计有限公司，广东深圳 518172；
    3.江西核工业工程地质勘察院，南昌 330038)
  • 收稿日期:2019-12-12 修回日期:2019-12-25 出版日期:2020-12-30 发布日期:2020-12-25
  • 作者简介:张 巍(1985-)，男，硕士，工程师，注册岩土工程师，研究方向为岩土工程和地质灾害的勘察设计。

Experimental Studies of Reinforced Fibers in All Recycled Material Mixtures

ZHANG Wei1,2， CHEN Jianchun3   

  1. (1.Shenzhen Longgang Geological Exploration Bureau， Shenzhen 518172;
    2.Shenzhen Comprehensive Geotechnical Engineering Investigation & Design Co. Ltd., Shenzhen 518172;
    3.Jiangxi Nuclear Industry Engineering Geological Survey Institute， Nanchang 330038)
  • Received:2019-12-12 Revised:2019-12-25 Online:2020-12-30 Published:2020-12-25

摘要： 通过试验表明，在全废渣混合料中掺加适量纤维材料能改善其力学性能。试验采用单丝状聚丙烯纤维，其最佳掺加量为混合料重量的0.08～0.12％，纤维全废渣混合料试样经过力学性能测试，随龄期的增长，其抗压强度和抗拉强度都具有一定的提高，且后期强度较未掺加纤维全废渣混合料增长明显。根据应力应变曲线特征，主要表现在试样弹塑性变形阶段，纤维全废渣混合料试样较未掺加混合料试样抗压强度提高约25%；纤维全废渣混合料的破坏特征基本符合莫尔库伦剪切规律，当纤维掺加量在合理的范围内，随着纤维含量的增多，混合料剪切破坏面增大。

关键词: 加筋纤维, 全废渣混合料, 强度, 应力应变

Abstract: The test results show that the mechanical properties of the recycled material mixtures can be improved by blending fibers. The monofilament polypropylene fiber was used in this experimental study. It was concluded that the optimal fiber content was 0.08% ~ 0.12% by the weight of the recycled mixtures. With the increase of curing age, both the compressive strength and tensile strength of the fiber mixed recycled material samples are improved. The strength in the later stage is significantly higher than that of the samples without adding fibers. From the characteristics of the stressstrain curve, the strength increase is mainly occurred the elastoplastic deformation stage. The results show that the compressive strength of the mixture is about 25% higher than that of the mixture without fibers, and the failure characteristics of the mixture basically conform to the Mohr Coulomb relationship. When the fiber content is within a reasonable range, the shear failure surface increases with the increase of fiber content.

Key words: Fiber Reinforcement, All Recycled Material Mixtures, Strength, Stress and Strain

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