Analysis of the impact of slump and release agents on the surface defects of fair-faced concrete
This study investigated the effects of different slumps and release agent types on the apparent quality of fair-faced concrete,aiming to provide an optimization plan to enhance the apparent quality of fair-faced concrete.Initially,the study analyzed the apparent characteristics of fair-faced concrete under various slumps,revealing that high slump fair-faced concrete exhibits poor surface quality after molding,with noticeable water wave patterns and localized color differences.Incorporating an appropriate amount of fly ash was found to improve the apparent quality of fair-faced concrete.In the study and analysis of release agents,the effects of water-based and oil-based release agents on the surface water marks and pore counts of fair-faced concrete specimens were compared.It is demonstrated that water-based release agents have a significant advantage in reducing the number of water marks and pores on the surface of fair-faced concrete,which can reduce the pore counts by 50％-95％.Scanning electron microscopy and infrared spectrum were utilized to analyze the microstructure and chemical composition of the release agents,revealing the stable presence of polar and non-polar groups in water-based release agents,as well as their uniform distribution characteristics on the mold surface.The results indicate that this specific molecular structure endows the release agent with excellent dispersibility and wetting effects,effectively reducing mechanical friction and adhesion energy between the mold and concrete.
万方数据
维普
