再生混凝土碳化性能研究进展

A review on the progress on carbonation performance of recycled concrete

再生混凝土作为一种绿色资源,越来越受工程领域的重视和倡导,而再生混凝土的碳化问题是混凝土耐久性面临的最大的难题之一。本文从再生骨料、水胶比、龄期等因素入手,归纳和总结了现有再生混凝土碳化问题取得的研究成果,并指出了目前对再生混凝土碳化因素研究存在的不足和缺陷;其次,对抑制再生混凝土碳化的试验方法进行了总结;再次对再生混凝土碳化深度模型进行了归类研究,并指出现存模型的优缺点;最后对再生混凝土碳化研究明确了方向。

As a kind of green resource,recycled concrete is increasingly receiving attentions in the engineering field.The carbonation problem of recycled concrete is one of the biggest problems facing concrete durability.Started with the factors such as recycled aggregate,water-binder ratio and ages,this paper summarizes the progress on study of the carbonation of recycled concrete,and points out the deficiencies and defects existed in the study of carbonation factors of recycled concrete.Then,the test methods for inhibiting the carbonation of recycled concrete are summarized.The carbonation depth models of recycled concrete are classified and studied,and the advantages as well as disadvantages of the existing model are proposed.Finally,the research direction of carbonation of recycled concrete is further clarified.