大掺量粉煤灰混凝土早期强度影响因素研究  

STUDY ON INFLUENCING FACTORS OF EARLY STRENGTH OF CONCRETE WITH LARGE FLY ASH CONTENT

作　　者：孔凡敏 陈喜旺 倪坤 杨柳 韩冰 KONG Fan-min;CHEN Xi-wang;NI Kun;YANG Liu;HAN Bing(BCEG Advanced Construction Materials Co.,Ltd.,100015,Beijing,China;Beijing Construction Engineering New Building Materials Technology Co.,Ltd.,102600,Beijing,China)

机构地区：[1]北京建工新型建材有限责任公司,北京100015 [2]北京建工新型建材科技股份有限公司,北京102600

出　　处：《建筑技术》2023年第19期2328-2332,共5页Architecture Technology

摘　　要：大掺量粉煤灰混凝土是通过粉煤灰取代混凝土中的部分水泥,不仅可以改善工作性能,而且能节约成本,在实际工程中也得到了一定的应用。以粉煤灰掺量、砂子细度、养护温度为试验参数,研究不同因素在不同龄期对大掺量粉煤灰混凝土抗压强度的影响。结果表明:粉煤灰掺量的适量增加(0%~40%)能提高混凝土的工作性能,养护温度在前期对大掺量粉煤灰混凝土的强度影响很大,后期减弱,砂子细度(1.8~2.6)与抗压强度成正比,随着粉煤灰掺量增加,抗压强度降低,大掺量粉煤灰混凝土的前期强度上升慢,后期可上升到使用强度。In concrete with large fly ash content,fly ash is used to replace some cement,which can not only improve the workability but also can reduce costs.This has been applied in some actual projects.With the fly ash content,sand fineness and curing temperature as test parameters,the influence of different factors on the compressive strength of concrete with large fly ash content at different ages was studied.Results showed:An appropriate increase of fly ash content(0%~40%)can improve the workability of concrete.The curing temperature has great impact on the strength of concrete with large fly ash content in the early stage,but the impact weakens in the later stage.The sand fineness(1.8~2.6)is proportional to the compressive strength,which can improve the workability in the later stage.

关 键 词：粉煤灰掺量 抗压强度 养护温度 砂子细度 

分 类 号：TU5[建筑科学—建筑技术科学]