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客运专线高性能混凝土电通量影响因素试验研究

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摘要 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。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28d电通量影响较大,对56d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。
作者 陈安民
出处 《科技信息》 2010年第13期307-308,322,共3页 Science & Technology Information
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