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促聚合与生物矿化改善轨道板用钠水玻璃性能

李茂红 潘璋 凌晨博 姚宁 李书娴 王平

李茂红, 潘璋, 凌晨博, 姚宁, 李书娴, 王平. 促聚合与生物矿化改善轨道板用钠水玻璃性能[J]. 西南交通大学学报, 2019, 54(4): 879-884. doi: 10.3969/j.issn.0258-2724.20180599
引用本文: 李茂红, 潘璋, 凌晨博, 姚宁, 李书娴, 王平. 促聚合与生物矿化改善轨道板用钠水玻璃性能[J]. 西南交通大学学报, 2019, 54(4): 879-884. doi: 10.3969/j.issn.0258-2724.20180599
LI Maohong, PAN Zhang, LING Chenbo, YAO Ning, LI Shuxian, WANG Ping. Improving the Performance of Sodium Silicate for Track Slab by Promoting Polymerization and Biomineralization[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 879-884. doi: 10.3969/j.issn.0258-2724.20180599
Citation: LI Maohong, PAN Zhang, LING Chenbo, YAO Ning, LI Shuxian, WANG Ping. Improving the Performance of Sodium Silicate for Track Slab by Promoting Polymerization and Biomineralization[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 879-884. doi: 10.3969/j.issn.0258-2724.20180599

促聚合与生物矿化改善轨道板用钠水玻璃性能

doi: 10.3969/j.issn.0258-2724.20180599
基金项目: 国家杰出青年科学基金资助项目(51425804);国家自然科学基金资助项目(51708458)
详细信息
    作者简介:

    李茂红(1977—),女,高级工程师,博士,研究方向为胶凝材料、涂料、混凝土等,E-mail:sclimaohong@swjtu.edu.cn

    通讯作者:

    王平(1969—),男,教授,研究方向为道路与铁道工程,E-mail:wping@home.swjtu.edu.cn

  • 中图分类号: TU52;TU58

Improving the Performance of Sodium Silicate for Track Slab by Promoting Polymerization and Biomineralization

  • 摘要: 为改善高铁轨道板涂料用钠水玻璃力学强度和耐水性,通过添加Ca(H2PO4)2,达到促进钠水玻璃生物矿化、提高硅氧聚合程度的目的. 首先在钠水玻璃中添加Ca(H2PO4)2制作样品,以未添加Ca(H2PO4)2的样品作空白对照;然后用万能材料试验机、耐水性试验检测样品性能,并用X-射线衍射仪、傅里叶红外光谱仪、固体核磁共振仪测试其微观组成和结构. 研究结果表明:Ca(H2PO4)2添加导致钠水玻璃力学强度提高160%,耐水性由浸水2 h完全溃散提高至浸水7 d无明显损坏;促使钠水玻璃仿生矿化形成力学强度高、耐水性好的人体骨主要无机成分Ca8H2(PO4)6•?H2O-NaHCO3-H2O;增强钠水玻璃中硅氧的聚合,使之形成耐水性更好的硅氧聚合体. 可推断得,添加Ca(H2PO4)2可明显提高钠水玻璃凝结硬化后力学强度和耐水性,具有应用于轨道板涂料的前景.

     

  • 图 1  耐水性试验

    Figure 1.  Water resistance tests

    图 2  C-WG和MCP-WG的抗压强度

    Figure 2.  Compressive strength of C-WG and GX-WG

    图 3  C-WG和MCP-WG的XRD图谱

    Figure 3.  XRD patterns of C-WG and MCP-WG

    图 4  MCP-WG烘干后的XRD图谱

    Figure 4.  XRD patterns of MCP-WG after drying

    图 5  C-WG和MCP-WG的FTIR图谱

    Figure 5.  FTIR patterns of C-WG and MCP-WG

    图 6  C-WG和MCP-WG的29Si NMR图谱

    Figure 6.  29Si NMR patterns of C-WG and MCP-WG

    图 7  Ca(H2PO4)2与钠水玻璃相互作用示意

    Figure 7.  Schematic diagram of the interaction between Ca(H2PO4)2 and sodium silicate

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出版历程
  • 收稿日期:  2018-07-06
  • 修回日期:  2018-09-15
  • 网络出版日期:  2019-06-06
  • 刊出日期:  2019-08-01

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