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5. 活性粉末混凝土损伤后的冻融性能研究

活性粉末混凝土损伤后的冻融性能研究

来源 :中国硅酸盐学会水泥分会第六届学术年会 | 被引量 : 0次 | 上传用户：ncwuer

【摘 要】

：

本文通过对钢纤维掺量为O％和2％的两种活性粉末混凝土试件分别加载至峰值荷载的O％、60％、70％和80％的压力值来模拟不同程度的损伤，得到了试件在不同程度损伤后加载度与基频振动频率之间的关系曲线，然后采用单面冻融法对试件的抗冻性能进行了研究.研究表明：56次冻融循环作用下，两种试件的基振频率均随损伤程度的提高而降低，钢纤维掺量为2％的试件降低程度较小，最大降幅仅为6.3％.冻融循环作用后，两种试件

【作 者】

：

黄瀚锋 安明喆 李同乐 余自若 张戈 

【机 构】

：

北京交通大学土木建筑工程学院,北京100044 北京城建设计发展集团股份有限公司,北京100071

【出 处】

：

中国硅酸盐学会水泥分会第六届学术年会

【发表日期】

：

2016年11期

【关键词】

：

活性粉末混凝土 损伤 纤维掺量 冻融循环 

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论文部分内容阅读

　　本文通过对钢纤维掺量为O％和2％的两种活性粉末混凝土试件分别加载至峰值荷载的O％、60％、70％和80％的压力值来模拟不同程度的损伤，得到了试件在不同程度损伤后加载度与基频振动频率之间的关系曲线，然后采用单面冻融法对试件的抗冻性能进行了研究.研究表明：56次冻融循环作用下，两种试件的基振频率均随损伤程度的提高而降低，钢纤维掺量为2％的试件降低程度较小，最大降幅仅为6.3％.冻融循环作用后，两种试件的质量变化均较小.损伤会降低试件的抗冻融能力，损伤程度越大，抗冻融能力降低越多.钢纤维掺量为2％的试件损伤后的抗冻融能力更强.

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