CAJ | 학술논문

为研究粉煤灰混凝土的抗冻性能，研究了水胶比为0.35，粉煤灰掺量为52%的大掺量粉煤灰混凝土在海水中的抗冻性能，利用混凝土快速冻融试验机，对海水中粉煤灰混凝土分别进行了0、100、200、300、400次快速冻融循环试验，并对冻融循环后的混凝土进行了单轴压力学性能试验。测得了冻融循环后混凝土的质量损失，动弹性模量以及单轴抗压强度。根据试验结果，系统地分析了冻融循环次数对大掺量粉煤灰混凝土单轴抗压强度的影响。结论表明：随冻融循环次数的增加，海水中大掺量粉煤灰混凝土的单轴强度逐渐降低，并具有一定规律性。这些结论可以为粉煤灰混凝土在寒冷地区海工混凝土构筑物的应用提供理论依据。
위연구분매회혼응토적항동성능，연구료수효비위0.35，분매회참량위52%적대참량분매회혼응토재해수중적항동성능，이용혼응토쾌속동융시험궤，대해수중분매회혼응토분별진행료0、100、200、300、400차쾌속동융순배시험，병대동융순배후적혼응토진행료단축압역학성능시험。측득료동융순배후혼응토적질량손실，동탄성모량이급단축항압강도。근거시험결과，계통지분석료동융순배차수대대참량분매회혼응토단축항압강도적영향。결론표명：수동융순배차수적증가，해수중대참량분매회혼응토적단축강도축점강저，병구유일정규률성。저사결론가이위분매회혼응토재한랭지구해공혼응토구축물적응용제공이론의거。
In order to study on frost resistance of fly ash concrete.The authors using the rapid freezing and thawing of concrete test ma-chine,tested the frost resistance performance of high volume fly ash concrete in seawater,whose water-binder ratio was 0.35,the amount of fly ash was 52%.The fast freezing-thawing test was carried on 0、100、200、300 and 400 cycles,then uniaxial compression test,the mass loss after freezing-thawing cycles,the dynamic elastic modulus and uniaxial compressive strength were tested.According to the test results, the systematic analysis of the influence of freezing-thawing cycles on the uniaxial compressive strength of high volume fly ash concrete. Conclusion:with the increase in the number of freezing-thawing cycles,the uniaxial strength mixed with high volume fly ash concrete in seawater decreased gradually,and which has certain regularity.These conclusions can provide a theoretical basis for the application of fly ash concrete in cold area of marine concrete qstructures.