Limestone Powder concerning Reaction and Rheololgy and the Development of Soft Cement for Enviroment.

石灰石粉的反应和流变学以及环保软水泥的开发。

• 批准号: 09650503
• 负责人: SAKAI Etsuo
• 金额: $ 2.37万
• 依托单位: TOKYO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650503/
• 关键词: Limestone powder; Reaction; Rheology; Filler cement; Flowing concrete; Superplsticizer; Delayed Ettringite Formation; Packing of powder; 反応; 環境負荷; 高性能セメント; 環境; 低負荷; 高機能セメント

Limestone powder are under development in order to enable production of flowing concrete without need for vibration during their placement and the production of filler cement. Influence of various types of inorganic powders having same particle size distribution of ordinary cement on the fluidity of cement paste with superplasticizer has been investigated. It is clear that the shape and the packing of powders are influencing the fluidity of cement paste with superplasticizer. In addition, Interparticle potential energy calculations were performed to investigate the mechanisms by which a new class of concrete admixtures, generally referenced as poly(carboxylic acid)-type(PC) superplasticizers, which aid in dispersing cement particles, are formed. And the reaction of limestone powder to C_3A-gypsum that has a similar composition to normal portland cement has been investigated, The phase compositions in hydrated C_3A-gypsum-CaCO_3 system and the mix-proportion producing Delayed Ettringite Formation in this system are determined.

石灰石粉末正在开发中，以便在浇筑和填充水泥生产过程中不需要振动就能生产流动混凝土。研究了与普通水泥粒径分布相同的各种无机粉体对掺有高效减水剂的水泥浆体流动性的影响。可见，粉体的形状和填料对掺减水剂水泥浆体的流动性有明显的影响。此外，还进行了颗粒间势能计算，以研究一种新型混凝土外加剂的形成机制，这种外加剂通常被称为聚羧酸型（PC）高效减水剂，有助于分散水泥颗粒。研究了石灰石粉与组成与普通硅酸盐水泥相似的c_3a -石膏的反应，确定了水化c_3a -石膏- caco_3体系的物相组成和产生延迟钙矾石形成的混合比例。

项目成果

坂井悦郎, 市川牧彦 大門正機: "石灰石微粉末の特性とその利用" コンクリート工学. 36. 3-9 (1998)

Etsuro Sakai、Makihiko Ichikawa、Masaki Daimon：“细石灰石粉的特性及其利用”《混凝土工程》36. 3-9 (1998)。

E.Sakai, S.Hoshino, Y.Ohba and M.Daimon: "The fluidify of cement paste with various types of inorganic powders" Proc.10^<th> Int'l Cong.Chemistry of Cement. Vol II. 2ii002-2ii010 (1997)

E.Sakai、S.Hoshino、Y.Ohba 和 M.Daimon：“使用各种类型的无机粉末对水泥浆体进行流化”Proc.10^<th> Intl Cong.Chemistry of Cement。

J.K.Lee, Y.Ohba, E.Sakai and M.Daimon: "Effects of Gypsum dihydrate on Hydration of C3A-Gypsum-CaCO3 system" Inorganic Materials. 5. 75-80 (1998)

J.K.Lee、Y.Ohba、E.Sakai 和 M.Daimon：“二水石膏对 C3A-石膏-CaCO3 系统水合的影响”无机材料。

李〓揆、大場陽子、坂井悦郎: "3CaO,Al_2O_3-CaCO_3-H_2O系の水和反応" セメント・コンクリート論文集. No.51. 38-43 (1997)

Lee Yi、Yoko Oba、Etsuro Sakai：“3CaO,Al_2O_3-CaCO_3-H_2O 体系的水合反应”《水泥与混凝土论文》No. 38-43 (1997)。

星野清一、大場陽子、坂井悦郎: "無機粉体の粒子特性とセメントペーストのレオロジー" セメントコンクリート論文集. VoL.50. 186-191 (1996)

Seiichi Hoshino、Yoko Ohba、Etsuro Sakai：“无机粉末的颗粒特性和水泥浆的流变学”《水泥混凝土论文》VoL.50（1996）。