CAJ | 학술논문

研究了粉煤灰、矿粉混凝土和硫酸钠粉煤灰、硫酸钠矿粉混凝土的氯离子扩散系数。参照NEL法测试混凝土的氯离子扩散系数，表明粉煤灰混凝土、矿粉混凝土和硫酸钠粉煤灰混凝土、硫酸钠矿粉混凝土，随着粉煤灰、矿粉掺量的增加混凝土的氯离子扩散系数降低。28 d时硫酸钠混凝土氯离子扩散系数低于相应不加硫酸钠的混凝土，60~90 d时高于相应不加硫酸钠的混凝土。相同龄期矿粉混凝土、硫酸钠矿粉混凝土氯离子扩散系数低于粉煤灰混凝土、硫酸钠粉煤灰混凝土。粉煤灰和矿粉都能改善混凝土内部结构密实性。矿粉混凝土的抗渗性好于粉煤灰混凝土。硫酸钠对粉煤灰、矿粉混凝土60~90d耐久性不利。
연구료분매회、광분혼응토화류산납분매회、류산납광분혼응토적록리자확산계수。삼조NEL법측시혼응토적록리자확산계수，표명분매회혼응토、광분혼응토화류산납분매회혼응토、류산납광분혼응토，수착분매회、광분참량적증가혼응토적록리자확산계수강저。28 d시류산납혼응토록리자확산계수저우상응불가류산납적혼응토，60~90 d시고우상응불가류산납적혼응토。상동령기광분혼응토、류산납광분혼응토록리자확산계수저우분매회혼응토、류산납분매회혼응토。분매회화광분도능개선혼응토내부결구밀실성。광분혼응토적항삼성호우분매회혼응토。류산납대분매회、광분혼응토60~90d내구성불리。
The NEL method is applied to investigate the chloride-ion-diffusion-coefficient of concrete which is added fly-ash ,slag, Na2SO4 and fly-ash as well as Na2SO4 and slag.It was found that The chloride-ion-diffusion-coefficient of fly-ash concrete,slag concrete, Na2SO4 and fly-ash concrete and Na2SO4 and slag concrete are reduced along with the increasing of the fly ash,slag content.At 28 d,the chloride-ion-diffusion-coefficient of Na2SO4 concrete was lower than the corresponding concrete without Na2SO4.At 60 d,90 d,the chlo-ride-ion-diffusion-coefficient of Na2SO4 concrete were higher than the corresponding concrete without Na2SO4.At the same age,The chlo-ride-ion-diffusion-coefficient of slag concrete and Na2SO4 slag concrete were lower than fly-ash concrete and Na2SO4 fly-ash concrete. Both fly-ash and slag can improve the density of the internal structure of concrete.The impermeability of slag concrete are better than fly-ash concrete.At 60 d and 90 d,Na2SO4 was disadvantage for the durability of fly-ash concrete,slag concrete.