预防碳化提高钢筋混凝土的耐久性

碳化是影响混凝土耐久性的一个重要因素,将加速混凝土中钢筋的腐蚀,从而缩短工程寿命。目前碳化破坏引起更加特别的重视,因全球关心的气候变化过程实质上就是空气中CO2浓度增加的过程。其次是因为使用高掺量混合材加剧了水泥的碳化破坏。加以高速发展新的基础设施,其中地下工程、地铁、火车站、城市中心等地的微气候中CO2的浓度显著增加。在施工过程中若养护不够,表面层空隙率增加,将更加加重CO2的腐蚀程度。本文将详细叙述这些因素,并提出解决碳化问题应采取的措施。

Preventing carbonation for improving the durability of reinforced concrete

Carbonation is an important fact for determining the durability of concrete,especially it will accelerate the corrosion of reinforced concrete.Now it is necessary to pay much more attention on the carbonation action,because the process of climate change is actually increasing the concentration of CO2 in the atmosphere.Using high amount of mineral admixtures in cement will exaggerate the damage of carbonation.In addition,the rapid development of infrastructures such as underground structures,metro,railway st...