Evaluation of the Characteristics of Silica Fume for a Concrete Admixture

混凝土外加剂硅粉特性的评价

• 批准号: 04555115
• 负责人: NAGATAKI Shigeyoshi
• 金额: $ 11.58万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04555115/
• 关键词: Silica Fume; Ultra Fine Particle; Particle Size Distribution; Aggregation; Dispersion; Compressive Strength; 窒素吸着法; レーザー回折法; 平均細孔径・総細孔量; 高性能減水剤

Most of silica fume used in Japan are imported silica fume.As very small amount of silica fume is produced in Japan, it is expected silica fume concrete to be high (or very high) performance concrete in Japan. It means that silica fume concrete should have many good properties such as high strength, high durability and high workability. So, it is necessary to know which characteristics of silica fume relates to the properties of concrete.The purpose of this research program is to find out the influence of the characteristics of 13 kinds of silica fumes, which were on the market in Japan during 1991-1992, as concrete admixtures considering. Through this study, following conclusions were clarified ;1) There are some correlations among physical and chemical properties of silica fume, such as correlation between siO_2 and alkali content.2) Early hydration of cement paste was accelerated by using silica fume.3) W/C,moisture content and SiO_2 content of silica fume are the two main factors on compressive strength of concrete containing silica fume. But the effect of superplasticizer was very strong.4) Reducing effect of silica fume on the concrete expansion due to A.S.R.(Alkali-Silica Reaction) could be evaluated by alkali content of silica fume.

日本使用的硅灰大部分为进口硅灰，由于日本生产的硅灰数量很少，因此日本的硅灰混凝土有望成为高（或极高）性能混凝土。这意味着硅灰混凝土应具有高强度、高耐久性和高工作性等优良性能。因此，有必要了解硅灰的哪些特性与混凝土的性能有关，本研究计划的目的是找出1991-1992年日本市场上销售的13种硅灰特性对混凝土外加剂的影响。通过研究，得到以下结论：1）硅灰的物理化学性质之间存在一定的相关性，如SiO_2与碱含量之间的相关性; 2）硅灰能促进水泥浆体的早期水化; 3）硅灰的水灰比、含水量和SiO_2含量是影响硅灰混凝土抗压强度的两个主要因素。4）硅灰对混凝土A.S.R.膨胀的抑制作用。（碱-硅反应）可通过硅灰中碱含量来评价。

项目成果

Shigeyoshi NAGATAKI,Nobuaki OTSUKI,Makoto HISADA and Chengning WU: "Influence of The Characteristics of silica Fume on Some Properties of Concrete :" Fifth CANMET / ACI International Conference on Fly Ash, Silica Fume, Slag and Natural Pozzolans in Concre

Shigeyoshi NAGATAKI、Nobuaki OTSUKI、Makoto HISADA 和 Chengning WU：“硅粉特性对混凝土某些性能的影响：”第五届 CANMET / ACI 混凝土中粉煤灰、硅粉、矿渣和天然火山灰国际会议

長滝重義・大即信明・久田 真・水野和彦: "シリカフュームの分散の程度がセメント硬化体の強度に及ぼす影響" JSCE年次大会. 430-433 (1993)

Shigeyoshi Nagataki、Nobuaki Ohsoku、Makoto Hisada 和 Kazuhiko Mizuno：“硅灰分散度对硬化水泥强度的影响”JSCE 年会 430-433（1993 年）。

Shigeyoshi NAGATAKI and Chengning WU: "A Study on Properties of Cement Advanced by Combination Use of Silica Fume and Blast Furnace Slag" Fifth CANMET / ACI International Conference on Fly Ash, Silica Fume, Slag and Natural Pozzolans in Concrete. (1994)

Shigeyoshi NAGATAKI和Chengning WU：“硅粉和高炉矿渣组合使用提高水泥性能的研究”第五届CANMET / ACI混凝土中粉煤灰、硅粉、矿渣和天然火山灰国际会议。

長滝重義,大即信明,久田真,水野和彦: "シリカフュームの分散の程度がセメント硬化体の強度に及ぼす影響" JSCE・年次大会. 430-433 (1993)

Shigeyoshi Nagataki、Nobuaki Ohsoku、Makoto Hisada、Kazuhiko Mizuno：“硅灰分散程度对硬化水泥强度的影响”JSCE 年会 430-433（1993）。

長滝 重義: "シリカフュームの品質評価と,その試験方法に関する研究" 日本シリカフューム研究会 第6回研究会資料. 1-41 (1992)

永泷茂义：“硅粉质量评价及其测试方法的研究”日本硅粉研究组第6次研究会议资料1-41（1992）。