天津高银117大厦冬期施工混凝土临界强度及耐久性研究

发布时间：2018-05-01 23:35

本文选题：冬期施工 + 临界强度　；参考：《硅酸盐通报》2016年10期

【摘要】：研究含气量、防冻组分对混凝土临界强度的影响,通过冻融循环、氯离子渗透性能及碳化性能表征混凝土耐久性。结果表明:含气量越高,混凝土达到临界强度时间越短,临界强度值越低;防冻组分对混凝土低温环境下强度发展具有促进作用;达到临界强度后,掺防冻组分试样抗冻等级、氯离子渗透性及碳化性能与标准试样相当,分别为F200、570 C及3.4 mm,不掺防冻组分试样耐久性能显著劣化。防冻组分加快了水化反应进程,尤其在负温环境中养护时,水化程度显著加深。
[Abstract]:The effect of gas content and antifreeze component on the critical strength of concrete was studied. The durability of concrete was characterized by freezing thawing cycle, chloride permeability and carbonization performance. The results showed that the higher the gas content, the shorter the critical strength of concrete was, the lower the critical strength was, and the antifreeze component promoted the development of the strength under the low temperature environment of concrete. When the critical strength is reached, the frost resistance grade of the antifreeze component, the chloride permeability and the carbonization performance are equivalent to the standard sample, F200570 C and 3.4 mm respectively. The durability of the antifreeze component samples is significantly worse. The antifreeze component accelerates the hydration process, especially when it is maintained in the negative temperature environment, the hydration degree is greatly deepened.

【作者单位】：天津大学;中建商品混凝土天津有限公司;
【分类号】：TU755.8

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