同人们的期望相反,由于碳化对混凝土的影响,氯化物对混凝土的侵蚀以及混凝土骨料中碱性物质的自身反应等因素使混凝土不能成为一种耐久的材料.作为影响混凝土耐久性的问题,第一,主要是浇捣混凝土没有充分密实;第二,没有足够保护层厚度等施工质量造成的. Contrary to people’s expectations, due to the influence of carbonization on concrete, the erosion of concrete by chlorides and the self-reaction of alkaline substances in concrete aggregates, the concrete cannot become a durable material. As a problem affecting the durability of concrete, First, the main reason is that the cast concrete is not fully dense; second, there is not enough protective layer thickness and other construction quality.