早强剂对高流动性大掺量粉煤灰混凝土性能影响研究

发布时间：2018-02-27 12:44

本文关键词： 混凝土早强剂低强度高流动性　出处：《粉煤灰综合利用》2015年06期 　论文类型：期刊论文

【摘要】：研究了不同早强剂品种、掺量对高流动性大掺量粉煤灰混凝土的影响。结果表明:混凝土坍落度、半小时坍落度、含气量、凝结时间随着早强剂掺量的增加而下降;单掺任何早强剂品种后的混凝土强度均高于未掺早强剂的混凝土强度;当高流动性大掺量粉煤灰混凝土中掺入氯化钙,掺量为2.0%时,其28d抗压强度可达到21.8MPa;掺入硫酸钠,掺量为0.5%时,其28d抗压强度可达到25.0MPa;掺入三乙醇胺,掺量为0.015%时,其抗压强度可达到21.6MPa;硫酸钠早强剂激发高流动性大掺量粉煤灰混凝土活性效果好于氯化钙和三乙醇胺。
[Abstract]:The effects of different kinds of early strength agents on high fluidity and high content fly ash concrete were studied. The results showed that the slump, half-hour slump, gas content and setting time of concrete decreased with the increase of the content of early strength agent. The strength of concrete mixed with any kind of early strength agent is higher than that of concrete without early strength agent, and the compressive strength of concrete with high fluidity and large amount of fly ash can reach 21.8MPa at 28 days when the amount of calcium chloride is 2.0 and sodium sulfate is added into the concrete. When the dosage is 0.5, the compressive strength can reach 25.0MPa for 28 days, and the compressive strength can reach 21.6MPa with the addition of triethanolamine and 0.015.The activity of high-fluidity and high-volume fly ash concrete stimulated by sodium sulfate early strength agent is better than that of calcium chloride and triethanolamine.
【作者单位】：广西壮族自治区水利科学研究院;广西水工程材料重点实验室培育基地;
【基金】：广西水利厅科技项目(201312、201419)
【分类号】：TU528.2

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