大掺量矿物掺合料混凝土碳化行为研究进展

Research Progress on Carbonation Behavior of Concrete with Large Volume of Mineral Admixture

在国家积极推进碳达峰、碳中和目标背景下,水泥行业减少碳排放势在必行。大掺量矿物掺合料混凝土使用了大量矿物掺合料,大幅减少了水泥用量,因此受到较大关注。本文重点综述了大掺量矿物掺合料混凝土的碳化行为、微观机理研究现状和常用矿物掺合料对混凝土抗碳化性能的影响;总结了混凝土碳化的影响因素,以及碳化行为的测试评价方法和优缺点;最后,提出了碳化可能存在的途径,并指明了进一步的研究方向,这对于改善大掺量矿物掺合料混凝土耐久性和降低建筑行业碳排放具有重要意义。

It is imperative for the cement industry to reduce carbon emission in the context of Chinese active promotion of carbon peak and carbon neutrality goals.A large volume of mineral admixture is used in large volume mineral admixture concrete,which greatly reduces the amount of cement,so it has attracted great attention.In this paper,the carbonation behavior and microscopic mechanism of concrete with large volume of mineral admixture,and the influences of common mineral admixtures on concrete carbonation resistance were reviewed.The influence factors on carbonation of cement,the test and evaluation methods of carbonation behavior and their advantages and disadvantages were summarized.Finally,the possible ways of carbonation were proposed and the further research direction was pointed out,which is of great significance for improving the durability of concrete with large volume of mineral admixture and reducing the carbon emission of the construction industry.