基于粗糙集的盐碱环境混凝土电阻率与极化率影响研究

Influence of resistivity and polarizability of concrete in saline-alkali environment based on rough set

基于粗糙集理论,分析了拟盐碱环境作用下的混凝土电阻率与极化率影响规律,研究了电阻率法和激发极化法在受盐碱侵害的混凝土检测中的应用。结果表明,硫酸盐(26.92%)对混凝土电阻率的影响最大,氯盐、碳酸氢盐与边界效应(19.23%)次之,钢筋(15.38%)最小,说明电阻率法可以检测受盐碱侵害的混凝土,但在以氯盐、碳酸氢盐为主的环境中需要考虑混凝土边界的影响;硫酸盐和氯盐(33.33%)对混凝土极化率的影响最大,钢筋(28.57%)次之,边界效应(4.76%)最小,碳酸氢盐几乎没有影响,表明激发极化法也能检测受盐碱影响的混凝土,且可忽略边界效应;除了硫酸盐对钢筋混凝土的电阻率和极化率都成正影响外,氯盐和碳酸氢盐对其电阻率成正影响,对极化率成负影响。

Based on rough set theory,it analyzes the influence of resistivity and polarizability of concrete under saline-alkali environment,and studies the application of resistivity method and induced polarization method in the detection of concrete affected by saline-alkali.The results show that sulfate(26.92%)has the greatest influence on the resistivity of concrete,followed by chloride,bicarbonate and boundaries(19.23%),and steel bars(15.38%)have the smallest,indicating that the resistivity method can detect affected concrete by saline and alkali,but concrete boundaries effects need to be considered in an environment dominated by sulfates and chlorides.Sulfate and chloride salts(33.33%)have the largest weighting effect on the polarization rate of concrete,followed by steel bars(28.57%),boundaries(4.76%)have the smallest,and bicarbonate has almost no effect,indicating that the induced polarization method can also detect affected concrete by saline and alkali,and the influence of concrete boundary effects can be ignored.In addition,except that sulfate has a positive influence on the resistivity and polarizability of reinforced concrete,chloride and bicarbonate have a positive influence on their resistivity and a negative influence on their polarizability.