CAJ | 학술논문

利用CDF试验法研究不同强度混凝土在不同浓度的氯盐融雪剂溶液中盐冻性能，分析盐冻和不同冻融循环对混凝土形貌特征、相对动弹性模量以及抗压、抗折强度的影响。研究表明：随着冻融循环次数的增加，混凝土表面破坏加剧，并且有加速的趋势；在不同浓度（3%、5%、20%）融雪剂溶液中经冻融150次后，浓度为5%的融雪剂对混凝土盐冻破坏程度最大；在强度等级相同的条件下，掺适量的硅灰和高效引气剂能有效提高混凝土抗盐冻破坏性能；盐冻对混凝土力学性能有重要的影响，混凝土强度随冻融循环次数增加而不断降低，其相对动弹性模量亦快速下降。
이용CDF시험법연구불동강도혼응토재불동농도적록염융설제용액중염동성능，분석염동화불동동융순배대혼응토형모특정、상대동탄성모량이급항압、항절강도적영향。연구표명：수착동융순배차수적증가，혼응토표면파배가극，병차유가속적추세；재불동농도（3%、5%、20%）융설제용액중경동융150차후，농도위5%적융설제대혼응토염동파배정도최대；재강도등급상동적조건하，참괄량적규회화고효인기제능유효제고혼응토항염동파배성능；염동대혼응토역학성능유중요적영향，혼응토강도수동융순배차수증가이불단강저，기상대동탄성모량역쾌속하강。
The freeze-thaw durability of concrete with various strength immersed in chloride snow-thawing agent solution with different density were studied using CDF method. The influence of surface characteristic,relative dynamic modulus of elasticity,compressive strength and flexural strength of concrete exposed to chloride salt attacks and freezing-thaw cycle were analyzed.The research results showed that the concrete surface damage was accelerated with the increase of freeze-thaw cycles. The 5%density solution has the greatest impact damage after 150 times freeze-thaw deicing in different densities(3%,5%,20%). Appropriate amount of silica fume and high-per-formance air-entraining agent can improve the salt-freezing-resistance ability of concrete. The deicer-scaling has an important influence to the mechanical properties of concrete.With the freeze-thaw cycles increasing,the strength continues to decrease and the relative dynamic modulus of elasticity also decreases rapidly.