Review of sulfate ion test method and diffusion law in concrete
The expansive products such as ettringite and gypsum caused by sulfate erodes concrete,resulting in expansion,cracking,peeling and reduction of mechanical properties of engineering structure.Therefore,a comprehensive understanding of the diffusion law of sulfate ions in concrete is helpful to the corrosion prediction of engineering buildings.Focusing on the theme of sulfate attack on concrete,it sorts out and summarizes the existing academic achievements,combs the sulfate attack law under various factors,introduces the experimental detection methods of sulfate ions in concrete,and summarizes the relevant progress of sulfate ion diffusion model at home and abroad.Finally,based on the existing research results,the ion diffusion factors,experimental measurement methods and theoretical research models are prospected.
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