摘要
Our research focused on the analy sis of concrete deterioration mechan ism under the coup ling effects of flexural load,cy clic wetting and dry ing, and sulfate. The relative dy namic modulus of elasticity of a corroded concrete samp le was tested, and scannin g electron microscop e was used to observe the microstructure of concrete under the coup ling effects of flexural load,cy clic wetting and dry ing, and sulf ate. Results manif ested that flexur al load and cy clic wetting and dry ing durin g the concrete service chan ged the corrosion p rocess of the sulfate mediu m in con crete and enh anced the deterioration of con crete p erforman ce.Furthermore, the influencin g p atterns of strength grade of concr ete, mass concentration of sulfate solution, and mineral admixtures on the degree of concrete deterioration were identified.
Our research focused on the analysis of concrete deterioration mechanism under the coupling effects of flexural load, cyclic wetting and drying, and sulfate. The relative dynamic modulus of elasticity of a corroded concrete sample was tested, and scanning electron microscope was used to observe the microstructure of concrete under the coupling effects of flexural load, cyclic wetting and drying, and sulfate. Results manifested that flexural load and cyclic wetting and drying during the concrete service changed the corrosion process of the sulfate medium in concrete and enhanced the deterioration of concrete performance. Furthermore, the influencing patterns of strength grade of concrete, mass concentration of sulfate solution, and mineral admixtures on the degree of concrete deterioration were identified.
基金
Funded by Fujian Education Department(Nos.JA11329 and JA12412)
Quanzhou(Fujian)Techno logy Research and Development Program(Nos.2013Z158,2013Z47,and 2010G7)
