肯尼亚天然火山灰质材料粉磨特性和活性研究  

Study on the Grinding Properties and Activity of Natural Pozzolan in Kenya

作　　者：杨雪松 庞彪 夏京亮 YANG Xuesong;PANG Biao;XIA Jingliang(China Road&Bridge Corporation,Beijing 100001,China;China Academy of Building Research,Beijing 100013,China;National Construction Engineering Technology Research Center,Beijing 100013,China)

机构地区：[1]中国路桥工程有限责任公司,北京100001 [2]中国建筑科学研究院有限公司,北京100013 [3]国家建筑工程技术研究中心,北京100013

出　　处：《路基工程》2020年第6期29-33,共5页Subgrade Engineering

基　　金：国家重点研发计划项目(2016YFC0701000);北京市科技计划课题(Z181100003918005);中国交建重大基础研究发展项目(2017-ZJKJ-08)。

摘　　要：选取肯尼亚天然火山灰质材料凝灰岩和火山渣,通过粉磨功指数、相同细度粉磨时间和活性指数研究了两种天然火山灰质材料的粉磨特性和活性,并通过化学结合水、孔结构和SEM对其活性的差异进行了分析。结果表明:凝灰岩粉磨功指数为15.17 kWh/t,火山渣粉磨功指数为25.82 kWh/t,凝灰岩相比于火山渣更易磨细;火山渣的化学结合水低于凝灰岩,孔结构分布优于凝灰岩,从而使其活性高于凝灰岩。The natural pozzolan tuff and volcanic cinder in Kenya were selected to study the grinding properties and activities of the two kinds of natural pozzolanic materials by grinding work index,grinding time of the same fineness and activity index,and the differences of their activities were analyzed by chemical combined water,pore structure and SEM.The results show that the grinding work index of tuff is 15.17 kWh/t,the grinding work index of volcanic cinder is 25.82 kWh/t.The tuff is easier to grind than the volcanic cinder.The chemical combined water of volcanic cinder is lower than tuff and the pore structure distribution is better than tuff,so its activity is higher than tuff.

关 键 词：天然火山灰质材料 粉磨特性 活性指数 孔结构 火山渣 

分 类 号：TU521.21[建筑科学—建筑技术科学]