论文部分内容阅读
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。
Carbonization is an important factor affecting the durability of concrete, will accelerate the corrosion of steel in concrete, thereby shortening the life of the project. At present, the carbonization damage caused more special attention, because the climate change process of global concern is essentially the process of increasing the concentration of CO2 in the air. Second, because of the use of high-volume mixed materials exacerbated the carbonization of cement damage. The rapid development of new infrastructure, including underground engineering, subway, railway stations, urban centers and other places in the micro-climate CO2 concentration increased significantly. If the maintenance is not enough during the construction process, the porosity of the surface layer will increase, which will further aggravate the degree of CO2 corrosion. This article will elaborate on these factors and propose measures to address the carbonization issue.