Study on the Role of Inert Mineral Fines in Bridging the Hydration Products of Cement

惰性矿物粉在桥接水泥水化产物中的作用研究

• 批准号: 14550462
• 负责人: YAMAMOTO Yasuhiko
• 金额: $ 1.6万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550462/
• 关键词: mineral fines; hydration products; bridging role; strength development; water-cement ratio; mortar; fly ash

1.Inert mineral fines play a role of bridging the hydration products of cement and, thus, increase the compressive strength of hardened cement paste. The increase in strength due to true bridging is 0 to 5 N/mm^2, although the value changes depending on the cement content or water-cement ratio and test ages.2.When a part of cement in base mortar is replaced with the same volume of inert fines as the replaced cement, the ratio of the compressive strength of mortar containing the inert fines to that of base mortar is hardly influenced by test ages, temperatures, or the fineness of fines, although it decreases as the volume ratio of water to powder materials increases.3.The compressive strength ratio of two mortars, one containing a test fine and the other a inert mineral fine at a fixed volume rate to cement, could be a good index for evaluating the activity of mineral admixtures or their contribution to the strength development of concrete.4.Active mineral fines can effectively develop their binding capability in the range where water-cement ratio on mass basis is larger than 0.40.5.The reactivity of fly ash is quite sensitive to temperature.

1.惰性矿物微粉起到桥接水泥水化产物的作用，从而提高硬化水泥浆体的抗压强度。2.当用相同体积的惰性细粉取代基础砂浆中的部分水泥时，含有惰性细粉的砂浆的抗压强度与基础砂浆的抗压强度之比几乎不受试验龄期、温度或细小颗粒细度的影响，而是随着水粉比的增加而降低。一个测试细粉和一个固定体积比的惰性矿物细粉可以作为评价矿物掺合料活性或其对混凝土强度发展贡献的良好指标。4.活性矿粉在水灰比大于0.40.5的范围内可以有效地发挥其结合能力。

项目成果

T.Endo, Y.Yamamoto: "Study on the effects of mineral fines on the strength development of mortar"Proc.of 57^<th> JSCE Annual Meeting. Vol.V. 325-326 (2003)

T.Endo、Y.Yamamoto：“矿物粉对砂浆强度发展影响的研究”第 57 届 JSCE 年会议程。

遠藤崇司, 山本泰彦: "モルタルの強度発現に及ぼす鉱物質微粉末の影響に関する研究"土木学会第58回年次学術講演会講演概要集. V. 325-326 (2003)

Takashi Endo、Yasuhiko Yamamoto：“细矿粉对砂浆强度发展的影响研究”日本土木工程学会第 58 届年会学术会议摘要 V. 325-326（2003 年）。

N.Saito, Y.Yamamoto: "Study on the reactivity of various classes of fly ash"Proc.of JCI. Vol.24. 159-164 (2002)

N.Saito，Y.Yamamoto：“各类粉煤灰反应性的研究”Proc.of JCI。

斉藤伸明, 山本泰彦: "各種フライアッシュの活性に関する研究"コンクリート工学年次論文集. Vol.24. 159-164 (2002)

Nobuaki Saito、Yasuhiko Yamamoto：“各种粉煤灰活性的研究”混凝土工程年报第 24 卷（2002 年）。

斉藤伸明, 山本泰彦: "各種フライアッシュの活性に関する研究"コンクリート工学年次論文集. Vol.24・No.1. 159-164 (2002)

Nobuaki Saito、Yasuhiko Yamamoto：“各种粉煤灰活性的研究”混凝土工程年报第 24 卷·第 159-164 号（2002 年）。