再生混凝土耐久性影响因素分析

Analysis on factors influencing on the durability of recycled concrete

通过总结再生混凝土耐久性的影响因素,得出了不同因素对再生混凝土耐久性的影响特征。在相同配合比和再生骨料品质的情况下,混凝土的耐久性随着再生骨料取代率的增加而降低,但随着龄期的增加而增强;再生骨料中所含有的湿度对新拌混凝土的耐久性的影响是明显的,RAC抵抗周期荷载循环的能力随着水饱和度的增加而变大;对于潮湿养护条件,再生骨料对混凝土渗透性的影响并不明显。

According ot the summary of the influencing factors of the recycled concrete＇ s durability, the paper concludes the influence features of the various factors on the durability, indicates the concrete durability lowers along with the increasing the replacing ratio of recycled aggregate under the same mix proportion and quality of the recycled aggregate, but it turns to be better with increasing ages, illustrates the humidity in the recycled aggregate has the evident influence on the newly-mixed concrete durability, while the RAC capacity to resist the period loading circle, and proves the recycled aggregate has unclear influence on concrete＇ s permeability under the moist maintenance.