模拟海水低温环境下混凝土抗压性能试验研究  

Experimental study on compressive property of concrete corroded by simulated seawater in low-temperature

作　　者：张英姿[1] 陈国芳[1] 范颖芳[2] 

机构地区：[1]哈尔滨工业大学土木工程系,山东威海264209 [2]大连海事大学道路与桥梁工程研究所,辽宁大连116026

出　　处：《混凝土》2015年第4期44-48,共5页Concrete

基　　金：国家自然科学基金资助(50708010;51308166);威海市科技发展计划项目(2013DXGJ08);哈工大科研创新基金(2015119)

摘　　要：为了研究低温海水环境下混凝土的抗压力学性能变化,依据实测温度变化记录(不同于以往快速冻融试验),在试验室模拟了低温海水环境下混凝土的腐蚀过程,对在不同腐蚀程度下60个混凝土棱柱体试件进行抗压性能试验,得到了不同腐蚀时期混凝土抗压性能指标(轴心抗压强度、静力受压弹性模量等)。试验结果表明:低温海水侵蚀后混凝土试件的外观、质量和破坏形态等均随侵蚀时间发生变化,且随着腐蚀时间的延长,轴心抗压强度逐渐降低,但弹性模量变化不明显;分别采用质量损失、抗压强度、弹性模量和吸能能力等指标的变化率为损伤指标,对不同腐蚀程度混凝土力学性能的退化进行分析,得到了各损伤指标与混凝土抗压性能退化程度之间的变化规律。To investigate compressive performance of concrete serviced in the low-temperature seawater environment,accelerated corrosion tests were executed on 60 concrete prisms specimens in the laboratory. Specimens were exposed to the simulated low-temperature seawater environment,and the change of the temperature is different from the rapid freezing-thawing cycle. Axial compressive strength,elastic modulus,weight and appearance of the corroded specimens were achieved. It is shown that,in the low-temperature seawater environment,physical and mechanical property of concrete specimens changed. It is discovered that the compressive strength of the concrete decrease with the increase of corrosion duration,while elastic modulus has no regular change. Taking the mass loss ratio,strength degradation ratio and elastic modulus degradation ratio and energy loss as damage index,effects of the corrosion solution on the property of concrete were discussed in detail. Relationships between the damage indices and corrosion state of specimens were achieved.

关 键 词：混凝土 腐蚀 抗压性能 低温 海水 

分 类 号：TU528.01[建筑科学—建筑技术科学]