新型水下聚凝充填材料配合比及力学性能试验研究
  • 作者: 阮艳妹,罗旭,卢晓智,等
论文摘要

新型水下聚凝充填材料配合比及力学性能试验研究*

阮艳妹1,罗旭1,卢晓智1,梅源2,3 

(1.广州地铁设计研究院股份有限公司,广东 广州 5100102.西安建筑科技大学土木工程学院,陕西 西安 7100553.陕西省岩土与地下空间工程重点实验室,陕西 西安 710055)

[摘要]为了配制既满足工作性能又能达到基本力学性能要求的新型水下聚凝充填材料(NWC-FM),从盾构泥入手,用X射线、扫描电镜(SEM)和光学显微镜分析其微观形貌、孔径分布及宏观性能,基于此初步确定5组配合比,并通过力学性能试验进行验证。结果表明,NWC-2组试块弹性模量最大,抵抗变形的能力最大;NWC-2组试块峰值应力最大,为10.25MPaNWC-4组试块峰值应力次之,为7.76MPaNWC-5组试块峰值应力最小,为2.462MPa。经分析调整,选取NWC-5组作为最优配合比,且满足配制要求。

[关键词]水下聚凝充填材料;配合比;力学性能;抗压强度;微观

[中图分类号]TU528     [文献标识码]A      [文章编号]1002-8498(2021)04-0083-04

Experimental Research on the Mixing Ratio and Mechanical Properties of New Type of Underwater Coagulant Filling Material

RUAN Yanmei1, LUO Xu1, LU Xiaozhi1, MEI Yuan2,3 

(1.Guangzhou Metro Design & Research Institute Co., Ltd., Guangzhou, Guangdong 510010, China; 2. College of Civil Engineering, Xian University of Architecture and Technology, Xian,  Shaanxi 710055, China; 3. Shaanxi Key Lab of Geotechnical and Underground Space Engineering (XAUAT), Xian, Shaanxi 710055, China)

Abstract: In order to make both can satisfy the working performance and can meet the requirements of basic mechanical properties of a new type of under water coagulant filling material, this article obtains from the shield of mud, with X-ray phase analysis (X-ray diffraction, XRD), scanning electron microscopy (SEM) and optical microscope analyses the microscopic morphology, pore size distribution and the performance of the macro analysis. Based on this, the five sets of mix ratios were preliminarily determined and verified by mechanical performance tests. The results show that the elastic modulus of NWC -2 test is the largest, and the ability to resist deformation is the largest. The maximum peak stress of NWC -2 test is 10.25 MPa, followed by 7.76 MPa for NWC -4 test, and 2.462 MPa for NWC -5 test. Through analysis and adjustment, NWC-5 group is selected as the optimal mix ratio, and meets the requirements of the preparation.

Keywords:underwater coagulant filling material; mix ratio; mechanical properties; compressive strength; micro

* 陕西省重点研发项目(2020SF-373

[作者简介]阮艳妹,高级工程师,Email37763986@qq.com

 

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