摘要
为了解混凝土在持续扰动条件下力学性能变化规律,采用电磁振动台模拟正常交通状态下行车激发的桥梁振动,对桥梁修补用混凝土进行扰动,考察玄武岩纤维对混凝土抗扰动能力的影响。实验结果表明:扰动能明显降低混凝土抗压强度,加入玄武岩纤维以后,改善了混凝土因扰动导致的分层离析现象,明显提高了混凝土的抗扰动能力;L20纤维对提高混凝土的抗扰动能力优于L3纤维;扰动条件下,若掺加单一类型纤维,当L20纤维掺量为0.3%时混凝土抗压强度最大,若掺加混合纤维,当L20纤维掺量为0.1%,L3纤维掺量为0.2%时混凝土抗压强度最大;L20纤维掺量0.3%时,或者L20纤维掺量0.1%,L3纤维掺量0.1%时混凝土的抗扰动能力优秀。
To understand mechanical properties change law of the concrete under the condition of persistent disturbances,the electromagnetic vibration table is used to simulate bridge vibration under normal traffic state caused by traveling vehicle,make disturbance on concrete used for bridge repair,and study the effect of basalt fiber on disturbance of concrete. The experimental results show that the disturbance can significantly reduce the compressive strength of concrete and layered segregation phenomenon caused by disturbance is improved after adding the basalt fiber,obviously improving the ability to resist disturbance of concrete; L20 fiber is superior to L3 fiber in improving the anti-disturbance capacity of concrete; Under disturbance conditions,if adding a single type of fiber,when the L20 fiber content is 0. 3%,the concrete compressive strength is the largest,if adding hybrid fiber,when L20 fiber content is 0. 1% and L3 fiber is 0. 2%,concrete compressive strength is the largest; When L20 fiber content is 0. 3%,or L20 fiber content is 0. 1% and L3 fiber content is 0. 1%,the concrete has excellent anti-disturbance capacity.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2017年第2期642-648,共7页
Bulletin of the Chinese Ceramic Society
基金
沈阳市科技计划项目(F16-095-1-00)
关键词
抗扰动混凝土
玄武岩纤维
力学性能
anti-disturbance of concrete
basalt fiber
mechanical property
