集料粒径对旧水泥板与水稳基层铣刨料再生性能的影响

通过对新料替换其中部分档粒径的旧料后形成试件的抗压强度的测定,探究了用新料替换某些粒径的旧料后对于成型试件强度的影响,为如何有效提高旧水泥板再生后的性能提供了依据。结果表明:用新料替换某一档粒径的旧集料不能提高强度,但用新料替换旧料的粒径的跨度变大时,则能有效提高再生后的强度,因此再生过程中应该在使用新细料的同时加入部分新粗料,这样能更有效的利用再生集料。对比试验表明:新料粒径的不同对于水稳基层铣刨料的影响比对水泥板破碎后的旧集料小,因此不能以水稳基层再生的规范来指导水泥板再生。

Impact of aggregate particle size on material regeneration performance of old cement concrete slab and cement stabilized base material

Through the test of compressive strength of specimens after using the new material to replace some particle size of old material,the paper researched the influence of new aggregate replacing old aggregate of some size on the compressive strength of the specimen after forming,and provided the basis for how to effectively improve the performance of old cement regeneration.The results show that to replace the old aggregate of one particle size cannot improve the compressive strength,but when the span of replaced new material particle size became bigger, the compressive strength of material regeneration will be improved.So it is necessary to add some new coarse aggregate to the specimen in the use of new fine aggregate in the process of regeneration.The compared test shows that influence of different particle sizes on cement stabilized base material is less than that of old material.So the norms of cement stabilized base regeneration cannot guide the cement slab regeneration.