助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   silica-fume 的翻译结果: 查询用时:0.008秒
图标索引 在分类学科中查询
所有学科
水利水电工程
更多类别查询

图标索引 历史查询
 

silica-fume
相关语句
  硅粉
     Influence of silica-fume on resistance of sulphate erosion for mortar
     硅粉掺合料对砂浆抗硫酸盐侵蚀性能的影响
短句来源
     Silica-fume is one kind of outstanding material for concrete. However, study about its mechanism and effect of sulphate erosion resistance is not enough.
     硅粉是优良的混凝土掺合料,但对其抗硫酸盐侵蚀机理与效果研究不够。
短句来源
  硅灰
     Contributions of Silica-fume to Strength and Flowability of 150MPa Ultra-high Strength and High Flowable Concrete
     硅灰对150MPa超高强高流态混凝土的强度及流动性的贡献
短句来源
     How silica-fume concrete evolved into high-performance concrete is also reviewed.
     回顾了硅灰混凝土如何发展成为高性能混凝土;
短句来源
  硅粉掺合料
     Influence of silica-fume on resistance of sulphate erosion for mortar
     硅粉掺合料对砂浆抗硫酸盐侵蚀性能的影响
短句来源
  相似匹配句对
     silica 40;
     白炭黑  40 ;
短句来源
     Silica,10;
     白炭黑,10;
短句来源
     The application on fumed silica
     气相法白炭黑的应用
短句来源
     Production of Fumed Silica
     气相法白炭黑生产技术的研究
短句来源
     Progress in Preparation of Nano-silica
     纳米二氧化硅的制备工艺及其进展
短句来源
查询“silica-fume”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  silica-fume
The results indicate that partial replacement of Portland cement by increasing percentages of silica-fume causes a regular decrease in alkalinity of the pore solution and a reduction in the chloride-binding capacity of the material.
      
Pore solution composition and chloride binding capacity of silica-fume cement pastes
      


Reactions of silica fumes and calcium hydroxide or hydrating tricalcium silicate have been studied using calorimetry, quantitative chemical analysis, trimethyl-silylationgel permeation chromatography, thermally evolved gas analysis and scanning electron microscopy. It is found that silica fume reacts immediately with calcium hydroxide forming calcium silicate hydrates (C-S-H) similar to C-S-H(Ⅱ). When excess silica exists, it reacts with the produced C-S-H, forming a new, highly polymerized C-S-H, having a very...

Reactions of silica fumes and calcium hydroxide or hydrating tricalcium silicate have been studied using calorimetry, quantitative chemical analysis, trimethyl-silylationgel permeation chromatography, thermally evolved gas analysis and scanning electron microscopy. It is found that silica fume reacts immediately with calcium hydroxide forming calcium silicate hydrates (C-S-H) similar to C-S-H(Ⅱ). When excess silica exists, it reacts with the produced C-S-H, forming a new, highly polymerized C-S-H, having a very low C/S ratio(<1.0).Silica fume accelerates the hydration of C_3S (especially at early ages) by lowering Ca~(2+) and OH~- concentration in liquid phase and providing large surface for reaction, which serves as a site for early C-S-H precipitation, The continuous consumption of free Ca(OH)_2, which is one of the hydration products of C_3S, is another cause for aeeelerating the hydration of C_3S. when all calcium hydroxides are consumed, the excess silica can react with the produced C-S-H, forming another kind of C-S-H, which is highly polymerized.Silica fume is considered as an ideal modelling material for reactive pozzolans used in concrete. Study using EDXA indicates that, in the silica-C_3S-H_2O system, grains of unhydrated C_3S are surrounded by three layers of C-S-H having different C/S ratios. The inner layer, with a C/S ratio of 1.5~1.6, is directly in contact with C_3S grains and is probably formed from C_3S hydration. The intermediate layer, having similar C/S ratio or slightly lower, is considered as the product of the reaction between silica fume and Ca(OH), formed in C_3S hydration. The outer layer, having a very low C/S ratio (<1.0) is highly polymerized and most probably formed by the reaction of silica fume with the already produced C-S-H. When the amount of silica fume added is low(<20%), the outer layer will not be formed. The reaction model is likely to be applied also to other reactive siliceous materials such as fly ash.

用传导型量热计、定量化学分析、三甲基硅烷化-凝胶渗透色谱分析、热分解气体分析和扫描电镜分析等方法研究了硅灰和氢氧化钙或硅酸三钙的反应。结果发现硅灰能和氢氧化钙立即反应,生成类似于C-S-H(Ⅱ)的水化硅酸钙。当硅灰过量时,则多余的硅灰能和已经生成的C-S-H继续反应,生成一种聚合度很高,但C/S很低(<1.0)的新型C-S-H。 在硅灰-C_3S系统中,硅灰对C_3S水化(特别是早期水化)表现出强烈促进作用。主要原因是硅灰有其巨大的活性表面积,可为反应产物C-S-H的早期沉淀提供一理想场所,从而使C_3S能在比较长时间内保持表面的相对“干净”,有利于C_3S的快速水化。另外,硅灰可不断消耗C_3S水化产物之一的氢氧化钙,也是促进C_3S水化的一个原因。当所有氢氧化钙都被消耗完毕后,多余的硅灰能和已有的C-S-H反应,生成高聚合度的另一种C-S-H。 硅灰是用以研究混凝土用的活性火山灰质材料的理想模型材料。通过X射线能谱分析发现,在硅灰-C_3S-H_2O体系中,未水化C_3S粒子周围存在着不同C/S的三层C-S-H。内层C-S-H直接与未水化C_3S接触,是由C_3S水化生成的,C/S≈1.5~1.6。中间层...

用传导型量热计、定量化学分析、三甲基硅烷化-凝胶渗透色谱分析、热分解气体分析和扫描电镜分析等方法研究了硅灰和氢氧化钙或硅酸三钙的反应。结果发现硅灰能和氢氧化钙立即反应,生成类似于C-S-H(Ⅱ)的水化硅酸钙。当硅灰过量时,则多余的硅灰能和已经生成的C-S-H继续反应,生成一种聚合度很高,但C/S很低(<1.0)的新型C-S-H。 在硅灰-C_3S系统中,硅灰对C_3S水化(特别是早期水化)表现出强烈促进作用。主要原因是硅灰有其巨大的活性表面积,可为反应产物C-S-H的早期沉淀提供一理想场所,从而使C_3S能在比较长时间内保持表面的相对“干净”,有利于C_3S的快速水化。另外,硅灰可不断消耗C_3S水化产物之一的氢氧化钙,也是促进C_3S水化的一个原因。当所有氢氧化钙都被消耗完毕后,多余的硅灰能和已有的C-S-H反应,生成高聚合度的另一种C-S-H。 硅灰是用以研究混凝土用的活性火山灰质材料的理想模型材料。通过X射线能谱分析发现,在硅灰-C_3S-H_2O体系中,未水化C_3S粒子周围存在着不同C/S的三层C-S-H。内层C-S-H直接与未水化C_3S接触,是由C_3S水化生成的,C/S≈1.5~1.6。中间层C-S-H的C/S与内层相近或略低。被认为是由硅灰和C_3S水化放出的Ca(OH)_2反应生成的。外层C-S-H的C/S很低(<1.0),而聚合度很高,很可能是由硅灰?

Conductive calorimetry, TGA, DSC, DTA, SEM-EDXA, helium comparasion pycnomerry and mercury intrusion porosimetry were used to study the micro-structural changes of hardened cement pastes when cement was blended with silica fume.In the cement pastes containing silica fume, at first, the hydration is accelerated by nucleation effect. Ca(OH)_2 forms very quickly and reactswith silica fume producing less crystalline, more amorphous and denser C-S-H of Iow C/S ratio which forms an impermeable structure with less...

Conductive calorimetry, TGA, DSC, DTA, SEM-EDXA, helium comparasion pycnomerry and mercury intrusion porosimetry were used to study the micro-structural changes of hardened cement pastes when cement was blended with silica fume.In the cement pastes containing silica fume, at first, the hydration is accelerated by nucleation effect. Ca(OH)_2 forms very quickly and reactswith silica fume producing less crystalline, more amorphous and denser C-S-H of Iow C/S ratio which forms an impermeable structure with less or no Ca(OH)_2. This makes the interface between unhydrated cement grains and C-S-H so dense and homogeneous that capillary pores or large pores are not connected through the coarse path between the unhydrated cement grains and Ca(OH)_2 or Ca(OH)_2 itselfs as it occurs in the neat cement paste, so the pore systems become much less continuous causing a large amount of "trapped" pores to be forraed which are difficult to be conneted with external pores.Using the proposed pore structure model, the improvement of mechanical properties and durability in hardened cement paste, mortar and concrete blended with silica fume can be explained.

本文采用了导热量热法、TGA、DSC、DTA、SEM-EDXA、氦比重法以及压汞测孔法研究了掺硅灰之后,水泥石微结构的变化。发现了其孔结构的特征并阐明了造成这种特征的原因。利用所提出的孔结构模型可以解释掺硅灰水泥石、砂浆和混凝土的许多力学性能以及耐久性得以提高的原因。

This paper mainly deals with: (1) The mean size and orientation of crystals on interface layer between hardened portland cement paste and limestone aggregates; (2)Effective fracture energy and microhardness of interface as well as properties of concrete; (3)Improvement of the structure of interface by adding silica fume and relationship between structure and properties of interface based on the improvement.According to the experimental results, explanation of the effect of silioa fume on the structure of hardened...

This paper mainly deals with: (1) The mean size and orientation of crystals on interface layer between hardened portland cement paste and limestone aggregates; (2)Effective fracture energy and microhardness of interface as well as properties of concrete; (3)Improvement of the structure of interface by adding silica fume and relationship between structure and properties of interface based on the improvement.According to the experimental results, explanation of the effect of silioa fume on the structure of hardened paste-aggregate interface is also proposed.

本文主要研究了影响硅酸盐水泥石-石灰石集料界面过渡层中Ca(OH)_2、AFt晶体的平均尺寸和Ca(OH)_2晶体取向指数的一些因素、界面有效断裂能以及界面区域显微硬度和混凝土强度。采用在水泥浆体中掺加硅灰作为改善界面结构的主要手段,通过界面结构的改善说明界面结构与界面性能和混凝上性能的关系。 根据实验结果解释了硅灰对界面过渡层结构的影响机理。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关silica-fume的内容
在知识搜索中查有关silica-fume的内容
在数字搜索中查有关silica-fume的内容
在概念知识元中查有关silica-fume的内容
在学术趋势中查有关silica-fume的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社