随着我国国民经济和交通运输事业的发展,我国的公路、城市道路及机场建设发展很快,而水泥砼路面所占的比例也在逐年增加.水泥砼强度随着龄期的增长而提高,后期增长的幅度较小;同时,路面砼经受着较大的轮载、磨耗及气候等严酷环境条件的作用,以及路基状况的不同,而局部或部分损坏.对使用了几年甚 With the development of national economy and transportation in our country, the construction of highways, urban roads and airports in our country have developed rapidly, and the proportion of cement concrete pavement is also increasing year by year.Cement strength increases with age, Late growth rate is small; the same time, pavement concrete to withstand greater wheel load, wear and climate and other harsh environmental conditions, as well as the subgrade conditions of different, and partial or partial damage to the use of a few years