Investigation of the Precipitates on the Concrete Surface due to Sulphate Exposure

Selected Scientific Papers: Journal of Civil Engineering

Oravec Jozef¹  Eštoková Adriana¹  Luptáková Alena¹  Kovalčíková Martina¹ 

[1] Technical University of Košice, Civil Engineering Faculty, Institute of Environmental Engineering, Slovakia;

关键词: concrete;    precipitates;    deterioration;   

DOI  :  10.1515/sspjce-2016-0016

来源: DOAJ

【 摘 要 】

The aim of this study is to investigate the durability of cement-based materials subjected to the effects of sulphuric acid in terms of surface deterioration. Damaged concrete surfaces and the samples’ mass changes were studied during 270-day simulation of both chemical and biological attacks. Chemical corrosion was simulated by sulphuric acid with pH of 3.0 and 4.0, respectively, while biological corrosion was simulated by activity of bacteria Acidithiobacillus thiooxidans. XRD and SEM analyses confirmed a massive sulphate precipitate formation on the concrete surface due to chemical and biological sulphate corrosion.

【 授权许可】

Unknown