碱反应性沉积岩骨料在碱溶液中的显微结构变化

• 作 者: 鱼本健人 柳俊哲 李玉顺
• 机 构: 东北林业大学土木工程学院 哈尔滨市:150040
• 出 处: 国外建材科技
• 发表日期: 1999年01期
• 关键词: 膨胀速度 显微结构变化 碱骨料反应 碱溶液 加速反应 迁移情况 微量元素迁移 EPMA 硅烷醇基 矿物组成

过去对碱骨料反应的进行程度用反应速度来评价的内容比较多,关于微量元素迁移的研究几乎没有,本文从微观角度,利用EPMA进行解释和探讨膨胀速度较慢的沉积岩骨料在碱溶液中加速反应,浸渍7～30d时骨料内部元素的迁移情况。1 实验方法1.1 试样的制备方法 本试验作用的4种骨料均为能够发生ASR,且膨胀较缓慢的沉积岩骨料,其产地、岩石名、密度等如表1,使用的骨料其粒径为10mm。把试样浸渍到80℃,1N NaOH 25 ml溶液

In the past, the extent of alkali-alkali reaction was evaluated by the reaction rate. There was almost no study on the migration of trace elements. From the microscopic point of view, the EPMA was used to explain and explore the slow expansion of sedimentary rock aggregates in alkali solution. In the accelerated reaction, the migration of the internal elements of the aggregate during 7 to 30 days of immersion. 1 Experimental Methods 1.1 Preparation of Samples The four types of aggregates used in this experiment are all sedimentary rock aggregates that can undergo ASR and have relatively slow expansion. Their origins, rock names, and densities are shown in Table 1. The diameter is 10mm. Soak the sample to 80°C, 1N NaOH 25 ml solution