高效减水剂对水泥砂浆早期自收缩的影响
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金资助项目(51178339);“十二五”国家科技支撑计划项目(2012BAJ20B02);国家重点基础研究发展计划(973计划)项目(2009CB623104 5)


Effect of Superplasticizer on Early Age AutogenousShrinkage of Cement Mortar
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    采用体积法就4种高效减水剂(聚羧酸系、萘系、三聚氰胺系和脂肪族)对水泥砂浆早期自收缩的影响进行了试验研究,并测定了各高效减水剂溶液不同浓度时的表面张力.结果表明:各高效减水剂均增大水泥砂浆的自收缩;掺萘系、三聚氰胺系及脂肪族高效减水剂水泥砂浆的自收缩随其掺量的增加而增大,掺聚羧酸系高效减水剂水泥砂浆的自收缩则随其掺量的增加呈先增后减的趋势;在水泥砂浆流动度相同时,4种高效减水剂增大水泥砂浆早期自收缩程度由大到小的顺序为:萘系、脂肪族、三聚氰胺系及聚羧酸系.分析表明,高效减水剂改变浆体孔径分布是其影响水泥砂浆早期自收缩性能的主要原因.

    Abstract:

    Influence of 4 kinds of superplasticizer(SP), i.e. polycarboxylate superplasticizer(PC), naphthalene sulphate based superplasticizer(NSF), melamine sulphate based superplasticizer(MSF) and aliphatic superplasticizer(SAF), on autogenous shrinkage(AS) of mortar in early age was studied by using the method of volumetric deformation measurement. The test results show that the 4 kinds of SP in various dosages can increase the AS. AS increases along with the increase of the addition amounts of NSF, MSF and SAF.It increases first and then falls with the dosage increase of PC. When mortars with SP are in the same fluidity, the capability of the SPs that increases the AS is in the following sequence(from strong to weak):NSF, SAF, MSF and PC. The pore size distribution of mortar is changed by superplasticizer is considered as the main way to affect AS.

    参考文献
    相似文献
    引证文献
引用本文

孙振平,杨辉,水亮亮,陈明,郑琨鹏.高效减水剂对水泥砂浆早期自收缩的影响[J].建筑材料学报,2013,(6):1020-1024

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2012-06-11
  • 最后修改日期:2012-12-16
  • 录用日期:
  • 在线发布日期: 2013-12-25
  • 出版日期: