Alkali Silica Reaction in Concrete Using a New Portland Cement Made from Municipal Waste Incinerator Ash

使用由城市垃圾焚烧炉灰制成的新型波特兰水泥在混凝土中进行碱硅反应

• 批准号: 14550463
• 负责人: KAWAMURA Mitsunori
• 金额: $ 2.3万
• 依托单位: Kanazawa University
• 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-14550463/
• 关键词: Alkali Silica Reaction; Waste glass; Lithium Ions; Expansive Pressure; Expansion; 膨張圧; 等価アルカリ量; リサイクル; 膨張; アルカリシリカゲル; アルカリの溶出

The results obtained in this study are as follows ;(1)Measured expansions due to the alkali silica reaction in mortars containing a crushed bottle glass aggregate were far greater than in mortars made with the Pyrex glass aggregate.(2)The lithia glass powder was conspicuously effective in the suppression of the alkali silica reaction as compared with the bottle glass powder. Great reduction in expansion with the addition of the lithia glass powder appear to be derived from the nature of the glass powder as a pozzolan and the lithium released from the glass.(3)The addition of as much as 20% fly ash completely suppressed ASR expansion even in high alkali cement mortars with the crushed bottle glass aggregate.(4)The expansive pressure generated under longitudinal restraint was in proportion to free expansion except that the 15% calcined flint-containing mortars with a high Na2Oe of 2.0 and 2.5% showed high expansions, but low expansive pressures. This exceptional behavior of the alkali-rich mortars appears to be due to the production of alkali-rich ASR gels.(5)The results obtained in the expansive pressure experiment suggest that, even if concretes containing ASR gels with a high alkali content exhibit great expansions in laboratory expansion tests, damages due to secondary stresses induced by the expansive pressure in concrete members under restraint may not be significant.(6)The intrusion of lithium ions into mortar with a reactive aggregate could arrest the expansion of mortars shortly after immersion in 0.5 N LiOH solution.(7)Expansion of mortars started decreasing earlier in mortars pre-cured in sealed in vinyl sacks for longer periods.(8)The alkalis in most ASR gels not far from interfaces between the cement paste and reactive aggregate particles appear to be replaced by the lithium ions supplied from the external solution

在这项研究中获得的结果如下：（1）由于含有压碎瓶玻璃骨料的迫击炮的碱性二氧化硅反应而导致的测量膨胀远大于用Pyrex玻璃骨料制成的迫击炮。（2）Lithia玻璃粉末是与瓶玻璃粉相比，在抑制碱二氧化硅反应的抑制方面明显有效。添加Lithia玻璃粉的膨胀大大减少似乎是从玻璃粉的性质中衍生而来的，如玻璃粉末，并从玻璃杯中释放出锂。（3）添加多达20％的粉煤灰完全抑制了ASR即使在高碱水泥砂浆中膨胀，带有压碎的瓶玻璃骨料。（4）在纵向约束下产生的膨胀压力与自由膨胀成比例，除了15％的钙化Flint含Flint的迫击炮（2.0）和2.5％显示较高的扩张，但压力低。富含碱的迫击炮的这种特殊行为似乎是由于产生富含碱的ASR凝胶。（5）在膨胀压力实验中获得的结果表明，即使含有高碱性含量的ASR凝胶的混凝土也表现出很大的表现实验室扩展测试的扩展，在约束下由混凝土构件引起的次应力造成的损害可能并不重要。 0.5 N LIOH溶液。（7）迫击炮的膨胀开始在预先固定在乙烯基袋中的迫击炮中较早降低。被外部溶液提供的锂离子代替

项目成果

Kawamura, M., Fuwa, H: "Effects of Lithum Salts on ASR Gel Composition and Expansion of Mortars"Cement and Concrete Research. 33・6. 913-919 (2003)

Kawamura, M., Fuwa, H：“锂盐对 ASR 凝胶组成和砂浆膨胀的影响”水泥和混凝土研究 33・6（2003 年）。

佐野主典, 川村満紀: "廃棄自動車フロントガラスのアルカリ反応性"第57回土木学会年次学術講演会概要集,第5部門. (2003)

佐野义典、河村三木：《报废汽车挡风玻璃的碱反应性》第57届日本土木学会学术年会第5部摘要集。（2003年）

Sano, K., Kawamura, M.: "Alkali Reactivity of Waste Glass of the Windscreen of Gars"Proc.of the 57th Annual Meeting of JSCE. Division V. (2003)

Sano, K.，Kawamura, M.：“Gars 挡风玻璃废玻璃的碱反应性”JSCE 第 57 届年会议程。

Kawamura, M., Iwahori, K.: "Expansion Pressure Caused by Alkali Silica Reaction in Mortars under Restraint"Proc.of the Japan Concrete Institute. Vol.14, No.3. 1-10 (2003)

Kawamura, M., Iwahori, K.：“约束下砂浆中碱硅反应引起的膨胀压力”，日本混凝土协会论文集。

佐野主典, 高原雅行, 川村満紀: "廃棄ガラス粉末によるアルカリシリカ反応抑制効果"平成15年度土木学会中部支部研究発表会講演概要集. (2004)

Yoshinori Sano、Masayuki Takahara、Miki Kawamura：“废玻璃粉抑制碱硅反应的效果”2003 年日本土木工程师学会中部分会研究报告摘要（2004 年）。