赵小明1,王新科2,乔宏霞2,黄 瑞1
赵小明,王新科,乔宏霞,等. PVA纤维混凝土冻融循环损伤规律及模型研究[J].混凝土与水泥制品,2022(1):53-57.
ZHAO X M,WANG X K,QIAO H X,et al.Study on Freeze-thaw Cycle Damage Law and Model of PVA Fiber Reinforced Concrete[J].China Concrete and Cement Products,2022(1):53-57.
PVA纤维混凝土冻融循环损伤规律及模型研究
赵小明1,王新科2,乔宏霞2,黄 瑞1
赵小明,王新科,乔宏霞,等. PVA纤维混凝土冻融循环损伤规律及模型研究[J].混凝土与水泥制品,2022(1):53-57.
ZHAO X M,WANG X K,QIAO H X,et al.Study on Freeze-thaw Cycle Damage Law and Model of PVA Fiber Reinforced Concrete[J].China Concrete and Cement Products,2022(1):53-57.
摘 要:研究了PVA纤维的体积掺量(0.05%、0.10%、0.15%)和长度(8 mm、12 mm)对混凝土相对动弹性模量、质量损失率和力学性能的影响,分析了PVA纤维混凝土的冻融损伤规律,建立了以相对动弹性模量为对象的Weibull概率分布损伤模型。结果表明:随着冻融循环次数的增加,体积掺量为0.10%、长度为8 mm的PVA纤维对混凝土抗冻性能的提升效果最好;建立的Weibull概率分布损伤模型可以有效反映PVA纤维混凝土的冻融损伤劣化规律,可为实际工程应用提供参考。
Abstract: The effects of PVA fiber volume content (0.05%, 0.10%, 0.15%) and length (8 mm, 12 mm) on the relative dynamic elastic modulus, mass loss rate and mechanical properties of concrete were studied, and the freeze-thaw damage law of PVA fiber reinforced concrete was analyzed, and the Weibull probability distribution damage model based on the relative dynamic elastic modulus was established. The results show that with the increase of freeze-thaw cycles, PVA fiber with volume content of 0.10% and length of 8 mm has the best effect on improving the frost resistance of concrete. The established Weibull probability distribution damage model can effectively reflect the freeze-thaw damage and deterioration law of PVA fiber reinforced concrete, and can provide a reference for practical engineering applications.
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