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本文论述了混凝土的细微结构;荷载作用引起的混凝土细微结构的变化,细微结构对有害成份((如氯离子和氧离子等)在混凝土中的有效扩散系数的影响,以及有效扩散系数与钢筋锈蚀速度的关系等。研究表明,荷载对钢筋锈蚀的影响是明显的。作者指出,限制使用荷载是延长建筑物使用寿命的有效力法,并对目前国际上出现的横向裂缝允许宽度逐渐放宽的趋势提出不同意见。
This paper discusses the microstructure of concrete, the changes of concrete structure caused by loading, the effect of fine structure on the effective diffusion coefficient of harmful components (such as chloride and oxygen ions) in concrete, and the effective diffusion coefficient and corrosion of steel bar Speed, etc .. The research shows that the influence of load on steel corrosion is obvious.The author points out that the restriction of load is an effective method to prolong the service life of the building, and the tendency of the allowable width of transverse cracks in the world is gradually relaxed Put forward different opinions.