西北水电
西北水電
서북수전
Northwest Water Power
2015年
5期
64-66
,共3页
正长岩%砂岩%碱活性%粉煤灰%抑制试验
正長巖%砂巖%堿活性%粉煤灰%抑製試驗
정장암%사암%감활성%분매회%억제시험
syenite%sand stone%alkali activity%flyash%restraining test
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。
採用巖相法、砂漿棒快速法和混凝土稜柱體法對比研究瞭砂巖、正長巖以及砂巖與正長巖2種不同比例組閤骨料對骨料堿活性的影響。試驗結果錶明：砂巖為活性骨料，以砂巖作為粗骨料、正長巖為細骨料的骨料組閤也為活性骨料，以正長巖作為粗骨料、砂巖為細骨料的骨料組閤有疑似堿活性，正長巖為非活性骨料。摻入20％以上粉煤灰均可有效抑製其堿活性反應。
채용암상법、사장봉쾌속법화혼응토릉주체법대비연구료사암、정장암이급사암여정장암2충불동비례조합골료대골료감활성적영향。시험결과표명：사암위활성골료，이사암작위조골료、정장암위세골료적골료조합야위활성골료，이정장암작위조골료、사암위세골료적골료조합유의사감활성，정장암위비활성골료。참입20％이상분매회균가유효억제기감활성반응。
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 aggre-gate.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.
