混凝土抗侵蚀防腐剂抗蚀系数试验方法研究

以40 mm×40 mm×160 mm试件替代10 mm×10 mm×60 mm试件(A法),建立了混凝土抗侵蚀防腐剂抗蚀系数试验方法(B法)。保持养护及腐蚀制度不变,按灰砂比1∶6,流动度(250±5)mm确定了水胶比,使侵蚀溶液浓度提高至15%,分别测试20℃侵蚀溶液中和水中90 d砂浆试件的抗压强度,以抗压强度比确定90 d抗蚀系数。结果表明:B法的90 d抗蚀系数与原A法的28 d抗蚀系数结果相吻合,B法是可行的。

Study on the Corrosion Resistance Coefficient Test Method for Environmental Corrosion-resistance Admixture

The corrosion resistance coefficient test method B for environmental corrosion-resistance admixture was established.The traditional 10 mm×10 mm×60 mm specimen(test method A)was replaced by 40 mm×40 mm×160 mm mortar specimen,while the curing and corrosion system remained unchanged,water-cement ratio was determined according to the mortar fluidity of(250±5)mm and the cement-sand ratio was 1∶6.The concentration of corrosion solution was increased to 15%.The compressive strength of mortar in corrosion solution and mortar in water at 20℃for 90 d were tested,respectively.And the corrosion resistance coefficient at 90 d was determined by the compressive strength ratio.The results show that the corrosion resistance coefficient at 90 d of method B is consistent with the corrosion resistance coefficient at 28 d of the original method A.Therefore,test method B is feasible.