中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (3): 144-148.doi: 10.16265/j.cnki.issn1003-3033.2018.03.025

• 安全工程技术科学 • 上一篇    下一篇

一种早强膨胀延迟封孔材料制备及性能研究

马梦晓1,2, 刘健1,2 教授, 吉小利3 副教授, 吴芬1,2, 罗麒1,2, 张超1,2   

  1. 1 安徽理工大学 能源与安全学院, 安徽 淮南 232001;
    2 安徽理工大学 煤炭高效开采省部共建教育部重点实验室, 安徽 淮南 232001;
    3 安徽理工大学 化学工程学院, 安徽 淮南 232001
  • 收稿日期:2017-12-02 修回日期:2018-02-10 出版日期:2018-03-28 发布日期:2020-11-09
  • 作者简介:马梦晓 (1992—),女,回族,安徽安庆人,硕士研究生,研究方向为安全管理。E-mail:15856695753@163.com。
  • 基金资助:
    国家自然基金面上项目资助(51674009);安徽省高校自然科学研究重点项目(KJ2016A1982016);国家级大学生创新训练项目(201610361014)。

Preparation and properties of a kind of accelerating early strength delayed expansion mine sealing material

MA Mengxiao1,2, LIU Jian1,2, JI Xiaoli 3, WU Fen1,2, LUO Qi1,2, ZHANG Chao1,2   

  1. 1 School of Energy and Safety, Anhui University of Science and Technology, Huainan Anhui 232001, China;
    2 Key Laboratory of Mine Safety and High Efficient Mining Jointlybuilt by Province and Education Ministry, Anhui University of Science and Technology, Huainan Anhui 232001, China;
    3 School of Chemical Engineering, Anhui University of Science and Technology, Huainan Anhui 232001, China
  • Received:2017-12-02 Revised:2018-02-10 Online:2018-03-28 Published:2020-11-09

摘要: 针对矿井水泥封孔材料硬化过程体积收缩及加入膨胀剂导致强度下降的问题,基于硅酸盐水泥,以聚丙烯酰胺为囊壁,包覆铝粉形成膨胀剂微胶囊,与铝酸钠、氯化钠、硫酸钠、三乙醇胺、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)为主要成分的复合早强剂联合使用,制备一种可达到早期强度与膨胀要求的矿用封孔材料;通过膨胀性能、抗压强度等测试,利用X射线衍射(XRD)分析法与扫描电子显微镜(SEM)等手段,研究外加剂对水泥封孔材料性能的影响。研究表明:当氯化钠掺量(占水泥质量的百分比)为0.5%、硫酸钠0.5%、三乙醇胺0.05%、AMPS1%、铝酸钠1%、铝粉微胶囊0.1%,1天抗压强度达到4.2 MPa,3天抗压强度达到6.7 MPa,膨胀时间延迟4 h,膨胀率达到19.32%,可实现强度与膨胀协调发展。

关键词: 封孔材料, 铝粉, 微胶囊, 膨胀性, 抗压强度

Abstract: In view of that conventional mine cement sealing materials cause shrinkage and conventional expansion agents cause the decreasing strength in the hardening process, a kind of accelerating early strength delayed expansion mine sealing material was prepared. The components of the material are silicate cement, aluminum powder in microcapsules formed by polyacrylamide, water sodium aluminate, sodium chloride, sodium sulfate, triethanolamine, and 2-Acrylamido-2-methyl-1-propanesulfonic acid(AMPS). The influences of admixtures on the properties of the material in early strength and expansion were studied by means of X ray diffraction (XRD) analysis and scanning electron microscopy(SEM). The results show that the compressive strength of the material after hydration for 1 day reaches 4.2 MPa and 3 days reaches 6.7 MPa, the delay time of expansion is 4 h and the inflation rate reaches 19.32% when the mass ratio of sodium chloride to cement is 0.5% ,sodium sulfate 0.5%, triethanolamine 0.05%, AMPS 1%, sodium aluminate 1%, and aluminum type microcapsule 0.1%, which satisfys the need of strength and expansion.

Key words: sealing material, aluminium powder, microencapsulation, expansion rate, compressive strength

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