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隔离墩病害原因分析

网址:www.zhihongmuju.cn  2021-10-18  作者:admin    阅读:

隔离墩病害原因分析
Cause analysis of isolation pier disease
2.1 环境侵蚀:在雨雪导致的潮湿环境中,汽车尾气中的二氧化硫等,在水的作用下侵蚀结构混凝土表层,造成结构混凝土由表及里的疏松、粉化——这就是我们经常见到的浇筑多年的混凝土表面粉化、疏松等现象的原因。
2.1 environmental erosion: in the wet environment caused by rain and snow, sulfur dioxide in automobile exhaust erodes the surface of structural concrete under the action of water, resulting in the looseness and pulverization of structural concrete from the outside to the inside - this is the reason why we often see the pulverization and looseness of concrete surface after pouring for many years.
2.2 碳化反应:二氧化碳、水和混凝土中的氢氧化钙结合生成溶于水的钙化合物并从混凝土中滤出,破坏了混凝土的碱性环境,降低其PH值,导致混凝土对钢筋的保护作用丧失,在潮气、氧气的作用下,导致钢筋锈蚀。
2.2 carbonation reaction: carbon dioxide, water and calcium hydroxide in concrete combine to form water-soluble calcium compounds, which are filtered out from the concrete, damaging the alkaline environment of the concrete, reducing its pH value, resulting in the loss of the protective effect of the concrete on the reinforcement, and the corrosion of the reinforcement under the action of moisture and oxygen.
2.3 氯离子侵蚀:化冰盐中的氯离子在潮湿的混盖土网 防寒布 麻绳 油麻绳 麻刀 沥青麻绳 静压造型线 自动浇注机 铸铁拍门 钢制拍门 玻璃钢拍门凝土环境中,在钢筋锈蚀的过程中起到催化剂的作用:其本身并不被消耗,但却可以大大加速钢筋的锈蚀速度,所以对钢筋锈蚀的影响是持续且快速的。
2.3 chloride ion corrosion: the chloride ion in the deicing salt acts as a catalyst in the process of reinforcement corrosion in the humid concrete environment: it is not consumed, but it can greatly accelerate the corrosion speed of reinforcement, so the impact on reinforcement corrosion is continuous and rapid.

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