中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2013, Vol. 32 ›› Issue (3): 410-414.DOI: 10.3969/j.issn.1674-0696.2013.03.10

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高频振动对引气混凝土引气参数和抗冻能力的影响

张艳聪 1,韩丽君 2,高玲玲   

  1. 1.山西省交通科学研究院黄土地区公路建设与养护技术交通行业重点实验室,山西太原030006; 2.天津市水利勘测设计院,天津300204;3.山西水利职业技术学院,山西运城040044
  • 收稿日期:2012-02-27 修回日期:2012-06-21 出版日期:2013-06-15 发布日期:2015-03-12
  • 作者简介:张艳聪(1985—),男,河南鲁山人,工程师,硕士,主要从事路面结构材料方面的研究E-mail:zouyouan103@163.com

Effect of HighFrequencyVibrationonAir-EntrainingParametersand FreezingResistanceof theAirEntrainedConcrete

ZhangYancong 1,HanLijun 2,GaoLingling   

  1. 1.KeyLaboratoryof HighwayConstruction&MaintenanceinLoessRegion,Shanxi Provincial ResearchInstituteof Communications,Taiyuan030006,Shanxi,China;2.TianjinSurvey&DesignInstituteof Water Conservancy, Tianjin300204,China;3.Shanxi ConservancyTechnical College,Yuncheng044004,Shanxi,China
  • Received:2012-02-27 Revised:2012-06-21 Online:2013-06-15 Published:2015-03-12

摘要: 针对两种引气混凝土施加不同时间的高频振动,采用硬化混凝土气孔结构分析仪定量地描述振动对引气混凝 土含气量气泡间距和气泡孔径分布等参数的影响,通过冻融循环试验反映高频振动与引气混凝土抗冻能力的关 系结果表明:振动施加初期混凝土含气量变化不大,随振动时间的延长(约60s后),含气量开始大幅下降,约105 s后,含气量下降放缓,最终趋于稳定;随高频振动时间的延长,混凝土气泡间距系数先增大再减小,气泡平均直径 不断减小,比表面积不断增大;480~960m的气泡对高频振动更为敏感,0~480m的气泡在混凝土中较为稳定; 长时间的高频振动会直接劣化引气性能,造成混凝土抗冻融能力下降 关键词:

关键词: 道路工程, 引气混凝土, 气孔结构, 抗冻性

Abstract: Highfrequencyvibrationof different timewasappliedontwokinds of air-entrainedconcrete. Porestructure analyzer of hardenedconcretewasappliedtoquantitativelydescribetheinfluenceof vibrationonair content of theairentrainingconcrete,thespacingfactorandtheporesize. Meanwhile,thefreeze-thawcycletest couldaccuratelyreflect therelationshipbetweenhighfrequencyvibrationandthefreezingresistance. Theresults showedthat theair content changedlittlewhenvibrationwasimposedat thebeginning. Then,it begantodecreaseobviously( about 60slater) . After about 105s,theair content decreasedslowlyandfinallytendedtobestable. Thecoefficientsof thespacingfactor of concreteincreasedinitiallyandthendecreased. Meanwhile,averagediameterof bubbledecreasedandthespecificsurfaceareaincreased. Theair bubblewhosediameter wasbetween480 mand960 mwasmoresensitivetohigh frequencyvibration. Onthecontrary,theair bubblewhosethediameter between480 mand960 mwasstable. In addition,longtimeof highfrequencyvibrationwoulddirectivelydegradetheair-entrainedabilityandthefreezingresistancewoulddecline.

Key words: roadengineering, air-entrainedconcrete, porestructure, frostresistance

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