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杨  文

 

 

（四川省建设工程质量安全总站，成都 610047）

摘要：为提高传统混凝土抗氯盐腐蚀性能，将粉煤灰、高炉矿渣粉、钢渣粉按照2∶5∶3质量比制备超细复合矿粉，分析不同超细复合矿粉替代水泥掺量对混凝土工作性能、力学强度、抗氯盐腐蚀性能的影响规律。结果表明:坍落度随着超细复合矿粉掺量的增加而增大，60 min坍落度损失随掺量的增加而减小；抗压、抗折强度随着超细复合矿粉掺量的增加呈先增大后减小趋势，掺量为40%最佳；氯离子扩散系数随超细复合矿粉掺量的增加而减小，掺量超过40%后降幅不再显著；随氯盐腐蚀循环增加，质量损失率变大，相对动弹性模量减小，超细复合矿粉替代水泥可提高混凝土抗氯盐腐蚀能力，掺量为40%时抗氯盐腐蚀能力最强。研究成果可完善耐氯盐腐蚀混凝土配合比设计，为废弃矿物材料工程应用提供参考。

关键词：超细复合矿粉；混凝土；强度；氯盐环境；腐蚀性

中图分类号：TU528.04

文献标志码：A

文章编号：1005-8249（2025）06-0018-06

DOI：10.19860/j.cnki.issn1005-8249.2025-06-004

 

 

 

YANG Wen

 

 

(Sichuan Provincial Construction Engineering Quality and Safety General Station,Chengdu 610047,China）

 

Abstract：To improve the resistance of traditional concrete to chloride salt corrosion,ultrafine composite mineral powder was prepared by mixing fly ash,blast furnace slag powder,and steel slag powder in a mass ratio of 2∶5∶3.The influence of different ultrafine composite mineral powders replacing cement on the workability,mechanical strength,and resistance to chloride salt corrosion of concrete was analyzed.The results showed that the slump increased with the increase of ultrafine composite mineral powder dosage,and the 60 minute slump loss decreased with the increase of dosage;The compressive and flexural strength show a trend of first increasing and then decreasing with the increase of ultrafine composite mineral powder content,and the optimal content is 40%;The diffusion coefficient of chloride ions decreases with the increase of ultrafine composite mineral powder content,and the decrease is no longer significant after the content exceeds 40%;As the chloride corrosion cycle increases,the mass loss rate increases and the relative dynamic elastic modulus decreases.The use of ultrafine composite mineral powder instead of cement can improve the concrete’s resistance to chloride corrosion,with the strongest resistance at a dosage of 40%.The research results can improve the mix design of chloride resistant concrete and provide reference for the engineering application of waste mineral materials.

 

Key words：ultra fine composite mineral powder;concrete;strength;chloride environment;corrosion resistance

作者简介：杨  文（1981—），男，硕士，工程师，研究方向:建设工程管理。

收稿日期：2025-06-17