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纳米级SiOx与硅灰对水泥基材料的复合改性效应研究
引用本文:唐明,巴恒静,李颖.纳米级SiOx与硅灰对水泥基材料的复合改性效应研究[J].硅酸盐学报,2003,31(5):523-527.
作者姓名:唐明  巴恒静  李颖
作者单位:1. 哈尔滨工业大学材料科学与工程学院,哈尔滨,150006;沈阳建筑工程学院材料科学与工程系,沈阳,110015
2. 哈尔滨工业大学材料科学与工程学院,哈尔滨,150006
3. 沈阳建筑工程学院材料科学与工程系,沈阳,110015
基金项目:国家自然科学基金 (5 96780 5 3 )资助项目,辽宁省“百千万人才工程”科技攻关项目 (2 0 0 0 -90 -B5 )
摘    要:用TEM测试评价了纳米级SiOx与硅灰的颗粒形貌,在分别研究纳米级SiOx硅灰的活性和其对水泥基复合材料改性的基础上,将纳米级SiOx与硅灰复合作为高活性的组合料,探索了对水泥基材料的复合改性效应,除进行宏观力学性能测试评价之外,用DTA,XRD和SEM分析了水泥基材料的组成、显微结构。研究表明,纳米级SiOx和硅灰具有很高的活性和表面效应,水泥石基体相的显微结构致密,CSH凝胶交织成致密的网状结构,结构缺陷显著降低。DTA,XRD分析表明,水泥石中Ca(OH)2明显减少,由Ca(OH)2带来的砂浆和混凝土集科界面过渡区的缺陷将大大改善。此外,纳米级SiOx与硅灰复合后对砂浆的力学性能改善效果比水泥净浆更为显著。

关 键 词:水泥基复合材料  纳米材料  活性  强度  显微结构
文章编号:0454-5648(2003)05-0523-05
修稿时间:2002年9月2日

STUDY ON COMPOUND EFFECT OF SILICA FUME AND NANO-SiOx FOR CEMENTING COMPOSITE MATERIALS
TANG Ming ,BA Hengjing ,LI Ying.STUDY ON COMPOUND EFFECT OF SILICA FUME AND NANO-SiOx FOR CEMENTING COMPOSITE MATERIALS[J].Journal of The Chinese Ceramic Society,2003,31(5):523-527.
Authors:TANG Ming    BA Hengjing  LI Ying
Affiliation:TANG Ming 1,2,BA Hengjing 1,LI Ying 2
Abstract:The characteristics of nano SiO x powder and silica fume were investigated with TEM. The activity of silica fume and nano SiO x was studied, and compound effect for cementing composite materials were discussed. The relationship with component, mic rostructure and performance was evaluated with DTA, XRD and SEM testing. The results show that, the nano SiO x and silica fume have as well as pozzolan activity and surface effect, in the hardened cement matrix, microstructure is very compacted, CSH gel forms dense net structure which is filled by secondary hydrate, so the structure defect is notably reduced. The result of DTA and XRD testing shows that, in hydration products, Ca(OH) 2 phase is notably reduced, and CSH gel is notably increased with the use of nano SiO x and silica fume. It is useful to performance of cementing composite materials. The mechanical performance of mortar is very notable than cement paste with nano SiO x and silica fume.
Keywords:cementing composite materials  nano  materials  activity  strength  microstructure
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