摘要
采用岩相法、砂浆棒快速法和混凝土棱柱体法对比研究了砂岩、正长岩以及砂岩与正长岩2种不同比例组合骨料对骨料碱活性的影响。试验结果表明:砂岩为活性骨料,以砂岩作为粗骨料、正长岩为细骨料的骨料组合也为活性骨料,以正长岩作为粗骨料、砂岩为细骨料的骨料组合有疑似碱活性,正长岩为非活性骨料。掺入20%以上粉煤灰均可有效抑制其碱活性反应。
Influence on the alkali activity by two different proportions of sand stone, syenite and sand stone ＆ syenite in concrete aggregate are studied by application of petrographic method, mortar bar method and concrete prism methods. The tests show that the sand stone is the active aggregate. The combined aggregate consisting of sand stone as coarse aggregate and syenite as fine aggregate is also of the active aggregate. The combined aggregate consisting of syenite as coarse aggregate and sand stone as fine aggregate seems with alkali activity. Syenite is of the non-active aggregate. With mixture of above 20% flyash, their alkali active reaction can be restrained.
出处
《西北水电》
2015年第5期64-66,共3页
Northwest Hydropower
关键词
正长岩
砂岩
碱活性
粉煤灰
抑制试验
syenite
sand stone
alkali activity
flyash
restraining test
作者简介
何惠英（1965-），女，安徽省安庆市人，高级工程师，主要从事混凝土材料试验工作．
