东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (8): 1192-1195.DOI: -

• 论著 • 上一篇    下一篇

一种新型膨润土类建筑密封膏的研究

刘学贵;付建飞;邵红;王恩德;   

  1. 东北大学资源与土木工程学院;沈阳化工学院环境与生物工程学院;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-08-15 发布日期:2013-06-22
  • 通讯作者: Liu, X.-G.
  • 作者简介:-
  • 基金资助:
    辽宁省自然科学基金资助项目(20061005)

New type of building sealants made from bentonite

Liu, Xue-Gui (1); Fu, Jian-Fei (1); Shao, Hong (2); Wang, En-De (1)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China; (2) College of Environmental and Biological Engineering, Shenyang Institute of Chemical Technology, Shenyang 110142, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-08-15 Published:2013-06-22
  • Contact: Liu, X.-G.
  • About author:-
  • Supported by:
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摘要: 研制了一种新型膨润土类遇水膨胀建筑密封膏.将质量分数分别为60%,65%,70%的钠基膨润土与矿物油和石蜡混合,制成3个建筑密封膏试样;利用自行研制的渗透系数测定装置,按照相关标准计算出这种新型建筑密封膏在非限制状态下的一些性能数据.研究表明:在非限制状态下试样24h体积膨胀率分别为211%,222%,256%;渗透系数分别为2.86×10-8,4.15×10-8和4.78×10-8cm/s;低温柔性好,并且膨润土质量分数分别为65%,70%的试样在80℃加热2h不流淌.XRD和SEM表征显示,试样中的膨润土被矿物油较好地包覆,膨润土的层间距基本未发生变化.试样既保留了膨润土吸水膨胀的能力,又...

关键词: 膨润土, 遇水膨胀, 建筑密封膏, 非限制状态, 渗透系数

Abstract: A new type of hydrophilic-expansion paste sealants made from bentonite for buildings was developed. Three samples were made from Na-base bentonite mixed with mineral oil and paraffin wax, and the mass fraction of bentonite used is different, i.e., 60%, 65% and 70%. A testing setup was therefore developed accordingly to determine the permeability coefficient so as to work out some properties of the paste sealants under unrestrained conditions, and the results showed that the 24-hour volume expansivities are 211%, 222% and 256% with their permeability coefficients 2.86 × 10-8, 4.15 × 10-8 and 4.78 × 10-8 cm/s, respectively. All samples showed favorable low-temperature flexibility, and the samples whose bentonite content is 65% or 70% have no flowability when heated at 80°C for 2 hr. XRD patterns and SEM images indicated that the bentonite in those samples are clad well by mineral oil, and the interlayer gaps of bentonite basically remain unchanged. It implies that in the samples the hydrophilic expandability of bentonite is kept up with high moldability provided. So, the sealing performance as shown by those samples has come up to the standard for the application to buildings.

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