混凝土劣化的检测与修复

The Detection and Repair of Concrete Deterioration

介绍了混凝土劣化检测和修复的方法,研究表明:钢筋锈蚀、冻融循环、碱骨料反应和酸碱侵蚀是造成混凝土劣化的四个主要原因;现代化技术能够准确检测混凝土裂缝和钢筋锈蚀等劣化问题,主要非破损检测方法有:打击法、超声法、放射法、红外分析、瑞利波频谱、雷达和抗渗性检测等;混凝土劣化的修复要针对其劣化的原因来开展,主要有钢筋锈蚀修复、裂缝修复、剥落或蜂窝麻面修复、渗漏修复、补强几个方面。

The method to detect and repair the concrete deterioration was introduced. Studies showed that steel corrosion, freeze- thaw cycles, alkali aggregate reaction and acid erosion were the four main cause of concrete deteriorations. Modem technology can accurately detect the deterioration problem, such as cracking of concrete and rebar corrosion, etc. The non- destructive test methods are hitting method, ultrasonic method, radiation method, infrared analysis, rayleigh wave frequency spectrum, radar and permeability resistance test, etc. The repair of concrete deterioration can be conducted according to the deterioration cause, mainly include rebar corrosion repair, crack repair, flake or honeycomb pitting surface repair, leakage repair and reinforcement, etc.