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掺粉煤灰混凝土恒电压快速钢筋锈蚀试验装置
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作者 贺鸿珠 陆宝鑫 沈丽华 《混凝土与水泥制品》 北大核心 1998年第3期18-20,共3页
在恒定电压下,通过测定流过置于5%NaCl溶液中的钢筋混凝土内的电流大小,来判断混凝土抗钢筋锈蚀的能力。本文介绍了试验装置,对比了其与GBJ82-85中相应的试验结果。
关键词 粉煤灰混凝土 恒电压 钢筋锈蚀试验 混凝土试件
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基于X-Ray CT扫描的钢筋混凝土锈蚀膨胀开裂试验研究
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作者 李里 黄昕 《土木工程》 2024年第3期257-268,共12页
为探究氯盐环境下混凝土中钢筋锈蚀导致混凝土开裂的细观机制,本文浇筑了带有钢筋的混凝土方块试件。试验过程中对试件进行单面浸泡,并施加恒定电流诱导钢筋锈蚀,当裂缝开展至浸泡溶液液面下降过快时停止通电,试验过程中记录混凝土表面... 为探究氯盐环境下混凝土中钢筋锈蚀导致混凝土开裂的细观机制,本文浇筑了带有钢筋的混凝土方块试件。试验过程中对试件进行单面浸泡,并施加恒定电流诱导钢筋锈蚀,当裂缝开展至浸泡溶液液面下降过快时停止通电,试验过程中记录混凝土表面裂缝的开展情况。在试验前后分别对试件进行一次X-Ray CT扫描,基于Avizo软件对扫描结果进行处理。通过Avizo对混凝土内的钢筋、孔隙和裂缝进行分割,有效地提取了试件中出现的宏观裂缝,统计了钢筋的锈蚀规律,分析了钢筋锈蚀导致的裂缝发展的细观尺度特征。 展开更多
关键词 钢筋锈蚀试验 CT扫描 孔隙分割 锈胀裂缝
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Study of the Protective Capacity of Cements Regarding Corrosion of Reinforcements under Joint Action of CO2 and Chloride Ions
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作者 Eliana Cristina Barreto Monteiro Victor Correia de Oliveira Pereira 《Journal of Civil Engineering and Architecture》 2015年第9期1017-1024,共8页
To examine the protection against reinforcement corrosion due to the combined action of CO2 and chlorides, experimental results of the evaluation of a study with three types of cement are presented. The study was perf... To examine the protection against reinforcement corrosion due to the combined action of CO2 and chlorides, experimental results of the evaluation of a study with three types of cement are presented. The study was performed observing the behavior of reinforcements which were put in samples submitted to accelerated carbonatation tests and accelerated tests under the effect of chlorides. For the evaluation, intensity corrosion measurements were used using the Pr (polarization resistance) technique, employing these measures as a deterioration indicator. Three types of cement available in the national market were used. The obtained results enabled the classification of the used cements, comparing their profile behaviors in the conditions of the proposed tests. 展开更多
关键词 CARBONATION chlorides CORROSION reinforced concrete polarization resistance.
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