首页> 外文OA文献 >Relationship between capillary pore spatial structure and electrical conductivity in cement pastes
【2h】

Relationship between capillary pore spatial structure and electrical conductivity in cement pastes

机译:Relationship between capillary pore spatial structure and electrical conductivity in cement pastes

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

セメントペースト供試体の電気伝導率を測定し,反射電子像の画像解析により明らかにされた粗大な毛細管空隙の空間構造の特徴との対応性を調べた.粗大な毛細管空隙構造は系全体の空隙量およびその連結性を反映し,その空間統計学に基づく特徴量は電気伝導機構と関係づけられる.また,鉱物質混和材の種類によって電気伝導率の低下の傾向が異なり,粗大毛細管空隙の空間構造と物質透過性の相関性が低下する.これは微細な毛細管空隙の連結性が混和材混入により低下するためと考えられる. Electrical conductivities of hardened cement pastes with and without mineral admixtures were investigated in relation to characteristics of coarse capillary pore spatial structure, which was revealed by SEMBSE image analysis technique. The pore structure was quantitatively evaluated by some parameters derived from the spatial statistical functions. There exists a good correlation between the coarse capillary pore structures and the electrical conductivity. The coarse capillary porosity and its spatial correlation distances do not contradict the total capillary porosity and pore connectedness which is induced from the FKG inequality. It is suggested that connectedness of invisible fine pores is also an increasing function of the fine porosity. In spite of the incorporation of mineral admixtures, the electrical conductivity of the pastes with the admixtures could be expressed with the same liner regression lines as the plain cement pastes without the admixtures. Furthermore, the incorporation of fly ash and silica fume did not decrease the continuity of coarse capillary pores. Nevertheless, the electrical conductivity decreased in the cement pastes with those admixtures. This fact suggests that more disconnected networks of fine capillary pores were generated in the cement pastes containing the mineral admixtures even if the total porosity was the same as the plain system without them.
机译:测量了水泥浆样品的电导率,并研究了通过反向散射电子图像的图像分析揭示的与毛细孔隙的空间结构特征的对应关系。粗糙的毛细孔隙结构反映了整个系统的孔隙体积及其连通性,基于其空间统计量的特征量与导电机理有关。另外,电导率降低的趋势根据矿物混合物的类型而变化,并且粗毛细孔的空间结构与材料渗透性之间的相关性降低。认为这是由于混合导致微毛细管空隙的连通性降低的缘故。通过SEMBSE图像分析技术研究了具有和不具有矿物掺合料的硬化水泥浆的电导率与毛细孔粗大空间结构特征的关系,并根据空间统计函数得出的一些参数对孔隙结构进行了定量评估。毛细孔隙度及其空间相关距离与FKG不等式引起的总毛孔孔隙度和孔隙连通性没有矛盾,这表明无形细孔的连通性尽管掺入了矿物掺合料,但与掺合料的浆体的电导率可以用与不含掺合料的普通水泥浆体相同的线性回归线表示。弱,孔隙也是细孔率的增加函数。公司虽然粉煤灰和硅粉的混合不会降低粗毛细孔的连续性,但水泥浆与这些掺合料的电导率却降低了,这一事实表明,在含有灰泥和硅灰的水泥浆中会产生更多不连续的细毛细孔网。矿物混合物,即使总孔隙度与不含它们的平原系统相同。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号