[1]周安,林家冉.高聚物玄武岩纤维固化钙质砂静力特性研究[J].湖北工业大学学报,2024,39(4):88-92.
　ZHOU An,LIN Jiaran.Compressive and Shear Strength of Polymer BasaltFiber Calcareous Sand[J].,2024,39(4):88-92.
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高聚物玄武岩纤维固化钙质砂静力特性研究()
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《湖北工业大学学报》[ISSN:1003-4684/CN:42-1752/Z]

卷:
39
期数:
2024年第4期
页码:
88-92
栏目:
出版日期:
2024-08-28

文章信息/Info

Title:
Compressive and Shear Strength of Polymer BasaltFiber Calcareous Sand
文章编号:
1003-4684(2024)04-0088-05
作者:
周安;  林家冉
(湖北工业大学土木建筑与环境学院， 湖北 武汉 430068)
Author(s):
ZHOU An;  LIN Jiaran
（School of Civil Engin.,Architecture and Environment,Hubei Univ. of Tech.,Wuhan 430068,China)
关键词:
建筑材料;  力学特性;  改良机理;  高聚物;  玄武岩纤维;  钙质砂
Keywords:
construction materials;  mechanical properties;  improvement mechanisms;  polymers;  basalt fibres;  calcareous sand
分类号:
TU411
文献标志码:
A
摘要:
为改善钙质砂在南海岛礁工程中地基承载能力不足的问题，通过无侧限抗压强度试验、直剪试验研究了不同高聚物（PFA）、玄武岩纤维（BF）掺量对钙质砂抗压、抗剪强度的影响。结果表明：钙质砂的抗压强度、抗剪强度均随着PFA、BF掺量的增加而增大，当BF和PFA掺量分别达到0.6%和6%时其抗压强度增幅明显提升，当BF掺量超过0.3%后试样的内摩擦角和黏聚力增幅均变缓。通过SEM、高清数码显微镜发现PFA能够黏结分散的钙质砂颗粒、包裹小颗粒，增强了界面相互作用。另外，BF能够增大钙质砂的滑动摩擦力并与PFA共同作用形成庞大的纤维网，提高钙质砂的强度特性。
Abstract:
To solve problems such as the lack of foundation bearing capacity of calcareous sand in South China Sea island projects, in this paper, the effects of different polymer (PFA) and basalt fibre (BF) contents on the compressive and shear strength of calcareous sand were investigated by unconfined compressive strength test and direct shear test. The results showed that the compressive strength and shear strength of calcareous sand increased with the increase of PFA and BF content, The increase in compressive strength increases significantly when BF and PFA are content at 0.6% and 6% respectively, and the increase in the angle of internal friction and the cohesion of the specimens is slowed down when the BF dose exceeds 0.3%. Finally, SEM and HD digital microscopy revealed that PFA was able to bond dispersed calcareous sand particles and wrap small particles to enhance interfacial interactions, In addition, BF increases the sliding friction of the calcareous sand and together with PFA it forms a large fibrous network which improves the strength properties of the calcareous sand.

参考文献/References:

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备注/Memo

备注/Memo:
［收稿日期］ 20220701［基金项目］ 国家重点实验室 重点基金（BHSKL1803KF）［第一作者］ 周安（1983-）， 男， 湖北武汉人， 工学博士， 湖北工业大学讲师， 研究方向为新材料微观力学性能。［通信作者］ 林家冉（1997-）， 男， 河南邓州人， 湖北工业大学硕士研究生， 研究方向为土木水利。
更新日期/Last Update: 2024-08-23