碱激发剂对不同掺量粉煤灰UHPC的影响

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英文篇名：Effect of alkali activator on UHPC with different fly ash contents 作者：许永震 ; 吴来帝 ; 敏海涛 ; 丁民 ; 任国斌 ; 魏定邦 ; 赵静卓 关键词：碱激发剂 ; 流动性 ; 经时损失 ; 抗压强度 ; 抗折强度 英文关键词：alkali activator;;fluidity;;time loss;;compressive strength;;flexural strength 中文刊名：JCKJ 英文刊名：China Building Materials Science & Technology 机构：甘肃长达路业有限责任公司;甘肃畅陇公路养护技术研究院有限公司;甘肃省公路养护技术创新中心;临夏公路局;甘肃省交通规划勘察设计院股份有限公司; 出版日期：2019-06-25 出版单位：中国建材科技 年：2019 期：v.28;No.165 语种：中文; 页：JCKJ201903038 页数：4 CN：03 ISSN：11-2931/TU 分类号：76-79

摘要

在UHPC材料中,通过在粉煤灰0%、20%、30%、40%的掺量下掺入不同碱激发剂(氢氧化钙、氢氧化钠、硫酸钠、硫酸钙、碳酸钠、水玻璃)测试砂浆浆体流动性、经时损失和胶砂试件抗压强度、抗折强度。结果表明:在UHPC材料中,随着粉煤灰掺量的增加,流动性改善明显,对抗压抗折强度影响较大;在粉煤灰掺量较小时,碱激发剂效果不明显,随着粉煤灰掺量的增加,碱激发剂的效果逐渐凸显出来;在粉煤灰掺量为30%、40%时,硫酸钙为最为突出的碱激发剂。
        In UHPC materials,the fluidity,time-consuming loss,compressive strength and flexural strength of mortar specimens were tested by adding different alkali activators(calcium hydroxide,sodium hydroxide,sodium sulfate,calcium sulfate,sodium carbonate,sodium silicate) at the content of 0%,20%,30% and 40% fly ash.The results show that in UHPC materials,with the increase of fly ash content,the fluidity improves obviously,which has a great influence on the compressive and flexural strength; when the fly ash content is small,the effect of alkali activator is not obvious;with the increase of fly ash content,the effect of alkali activator is gradually prominent; when the fly ash content is 30%or 40%,calcium sulfate is the most prominent alkali activator.

引文

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