碳化处理后再生混凝土抗盐侵蚀性能研究

黄开林; 薛垲; 李书进

doi:10.13204/j.gyjzG21010416

碳化处理后再生混凝土抗盐侵蚀性能研究

doi: 10.13204/j.gyjzG21010416

常州工学院土木建筑工程学院, 江苏常州 213001

详细信息

作者简介:
黄开林,男,1984年出生,硕士。电子信箱:66567085@qq.com

计量
- 文章访问数: 76
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- PDF下载量: 3
- 被引次数: 0
出版历程
- 收稿日期: 2021-01-04
- 网络出版日期: 2021-11-10
- 刊出日期: 2021-11-10

RESEARCH ON SALT CORROSION RESISTANCE OF RECYCLED AGGREGATE CONCRETE AFTER CARBONATION TREATMENT

School of Civil and Architectural Engineering, Changzhou Institute of Technology, Changzhou 213001, China

摘要

摘要: 通过改变碳化温度、相对湿度和碳化时间以确定再生骨料最佳碳化工艺参数；选取天然骨料、未碳化再生骨料和三种碳化骨料制备混凝土，探究碳化再生骨料对再生混凝土氯盐和硫酸盐侵蚀性能的影响规律。结果表明：碳化后再生骨料表观密度、吸水率和压碎值显著提升，确定的最佳碳化工艺参数为温度20 ℃、相对湿度55%和碳化时间24 h；相比再生混凝土，碳化骨料混凝土的抗氯离子渗透性能提升了5.1%~22.1%，但低于普通混凝土；碳化再生骨料的抗硫酸盐侵蚀性能不仅优于再生混凝土，而且高于普通混凝土。
- 再生混凝土 /
- 最佳碳化参数 /
- 氯离子渗透 /
- 硫酸盐侵蚀
Abstract: By changing the carbonation temperature, relative humidity and carbonation time, the best carbonation process parameters of recycled aggregate were determined; on this basis, natural aggregate, un-carbonized recycled aggregate and three kinds of carbonized aggregate were selected to prepare concrete. The influence of carbonation of recycled aggregate on the performance of recycled concrete in the corrosion of chloride and sulfuric acid was explored. The results showed that the apparent density, water absorption rate and crushing value of recycled aggregate increased significantly after carbonation. The optimal carbonation process parameters were as follows: temperature 20℃, relative humidity 55% and carbonation time 24 h. Compared with recycled concrete, the chloride ion penetration resistance of carbonated aggregate concrete was improved by 5.1%~22.1%, but lower than that of ordinary concrete. Unlike the chloride ion resistance, the sulphate attack resistance of carbonated recycled aggregate concrete was not only better than recycled concrete, but also higher than ordinary concrete.
- recycled aggregate concrete /
- optimal carbonation parameters /
- chloride ion penetration /
- sulphate attack

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参考文献(18)

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