摘要
本文提出了一种用酸溶解偏高岭土中的氧化铝以评价其活性的快速方法,该方法检测一个样品只需3h。试验结果表明:通过测定偏高岭土中氧化铝的溶出率可以评价煅烧高岭土与碱反应活性的大小;在实验电炉800℃下煅烧2h的高岭土活性最高,其氧化铝溶出率为75.81%;用其制备出的地聚合物28d抗压强度也最大,达75.3MPa;偏高岭土氧化铝溶出率与其生成的地聚合物强度值有明显的对应关系。
A fast reactive-Al203 detemination method for metakaolin reactivity evaluation was put forward and the determination took only 3 hours. The results showed that the active-Al of metakaoline can dissolve by acid so the activity could be evaluated by the dissolved percentage of total Al203. The reactivity reach maximum after the adoptive kaolin was calcined in electric cooker at 800 ℃ for 2 h , the percentage of dissolved Al203 was 75. 81% ; The compressive strength of geopolymer made by those metakaolin for 28 d reached 75. 3 MPa; The percentage of dissolved Al203 is related well to the compressive strength of geopolymer synthesized by metakaolin.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2008年第4期690-694,共5页
Bulletin of the Chinese Ceramic Society
基金
广州市科技攻关引导项目(2004-D038)
关键词
偏高岭土活性
快速检验方法
氧化铝溶出率
地聚合物
reactivity of metakaolin
fast determination
the percentage of dissolved Al203
geopolymer
