客运专线高性能混凝土电通量影响因素试验研究  

Experimental Research on the Influencing Factors on Electric Flux of High Property Concrete Applied in Passenger Dedicated Line

作　　者：王秀芬[1] 

机构地区：[1]中铁十二局集团有限公司,太原030024

出　　处：《铁道工程学报》2008年第7期79-82,共4页Journal of Railway Engineering Society

摘　　要：研究目的:试验研究各种因素对客运专线高性能混凝土抗氯离子渗透性能的影响规律,为优选混凝土配合比参数和指导施工提供依据。研究结论:电通量作为客运专线高性能混凝土耐久性的重要评价指标受到多种因素的影响:随着水胶比的增加,混凝土电通量逐渐增加;含气量对混凝土电通量影响不大,含气量达4.0%时混凝土电通量仍能满足耐久性要求;应严格控制混凝土用砂含泥量小于4.0%;40%的粉煤灰掺量不仅是混凝土抗压强度的拐点,也是耐久性指标的极限点;粉煤灰烧失量对混凝土早期及28 d电通量影响较大,对56 d龄期混凝土的电通量影响不太明显;对于混凝土电通量而言,外加剂有个临界掺量。Research purposes： The researches are done on the influencing regulation of all factors on the chloride ion penetration resistance of the high property concrete applied in passenger dedicated line for the purpose of choosing the concrete matching ratio for the construction. Research conclusions： As an important evaluation index of the durability of high property concrete for passenger dedicated line, electric flux is influenced by many factors ： The electric flux of concrete increases gradually with increase of water - glue ratio. The air content has less influence on the electric flux of concrete and the electric flux of concrete still meets the requirement of the concrete durability when it is up to 4%. The mud content of sand for concrete should be less than 4%. The 40% fly ash blend ratio is not only the return point of the pressure resistance of concrete, but also the limitation point of the concrete durability. The ignition loss of fly ash has big influence on the early electric flux and 28d electric flux of concrete, but less influence on 58d electric flux. To the electric flux of concrete, the external agent should have the max. limitation ratio.

关 键 词：客运专线 高性能混凝土 电通量 影响因素 试验研究 

分 类 号：TU528[建筑科学—建筑技术科学]