Preparation and performance of weakly acidic cleaning agent for concrete surface
CHEN Yanwen
SHEN Fubin
XIE Chenxing
Abstract：A weakly acidic cleaning agent suitable for cleaning rust spots on concrete surfaces was prepared by selecting sur-factants sodium linear alkyl sulfonate(LAS),fatty alcohol polyoxyethylene ether(AEO-9),hydroxyethylidene diphosphonic acid,citric acid as complexing agents,and D-gluconate sodium as pH buffering agent.Through single factor and orthogonal experiments,the op-timal formula for the cleaning agent was determined to be 5%citric acid(all in mass fractions)+4%HEDP+3%LAS+3%AEO-9,and the pH value was adjusted to 6 using sodium D-gluconate.And compared with a quality fraction of 9%oxalic acid and 0.1 mol/L hydrochloric acid solution,the cleaning effect and its impact on concrete performance were tested.The results showed that under the condition of(35±2)℃and 30 minutes of cleaning,the cleaning agent prepared in this article had a cleaning rate of 81.7%for rust spots,which was similar to oxalic acid cleaning agent.The compressive corrosion resistance coefficient of concrete after soaking was 0.912,which was better than 9%oxalic acid and 0.1 mol/L hydrochloric acid cleaning agent.
Keywords：surfactantrust spotsconcretedetergent
Publication Date：2025-02-24
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 43-48 )