关键词: 防腐阻锈剂;混凝土;硫酸盐侵蚀;氯离子渗透;腐蚀电量

Abstract: Different percentages of sulfate-resistant and corrosion-inhibiting admixtures take the place of Portland cement equivalently to compound concrete and study the influence of concrete compression strength, sulfate attack coefficient, chloride penetration coefficient, electric quantity and other index and observe morphology of cement hydration product of concrete 3 d, 7 d, 28 d by SEM.The results show that after infusion of sulfate-resistant and corrosion-inhibiting admixtures, working performance, later mechanics performance, sulfate corrosion resistance performance, chloride penetration performance, and chlorine salt corrosion resistance performance are superior to normal concrete obviously;infusion of sulfate-resistant and corrosion-inhibiting admixtures can consume C3A and Ca(OH)2 produced by cement hydration and generate ettringite and C-S-H gel and produce micro-expansion effect, which makes the structure more compact and improves the performance of sulfate and chlorine salt corrosion resistance.

Key words: sulfate-resistant and corrosion-inhibiting admixture;concrete;sulfate attack;chloride penetration;corrosion quantity of electricity