CAJ | 학술논문

选取粉煤灰掺量为0、10%、20%和30%，混凝土强度为C30、C40和C50的粉煤灰混凝土为研究对象，通过试验得到了粉煤灰混凝土龄期28 d和90 d的力学性能指标和碳化深度，分析了粉煤灰掺量对早期力学性能和碳化深度的影响。结果表明：随着龄期的增长，粉煤灰混凝土力学性能和碳化深度均有一定程度的增长；粉煤灰掺量越高，粉煤灰混凝土标准立方体抗压强度、劈裂抗拉强度、碳化深度增长程度越大，不同掺量的粉煤灰混凝土轴心抗压强度、弹性模量增长程度差异不大；混凝土强度越高，粉煤灰混凝土标准立方体抗压强度、碳化深度增长程度越小，劈裂抗拉强度增长程度越大，不同强度的粉煤灰混凝土轴心抗压强度、弹性模量增长程度差异不大。
선취분매회참량위0、10%、20%화30%，혼응토강도위C30、C40화C50적분매회혼응토위연구대상，통과시험득도료분매회혼응토령기28 d화90 d적역학성능지표화탄화심도，분석료분매회참량대조기역학성능화탄화심도적영향。결과표명：수착령기적증장，분매회혼응토역학성능화탄화심도균유일정정도적증장；분매회참량월고，분매회혼응토표준립방체항압강도、벽렬항랍강도、탄화심도증장정도월대，불동참량적분매회혼응토축심항압강도、탄성모량증장정도차이불대；혼응토강도월고，분매회혼응토표준립방체항압강도、탄화심도증장정도월소，벽렬항랍강도증장정도월대，불동강도적분매회혼응토축심항압강도、탄성모량증장정도차이불대。
Fly ash concrete which fly ash contents were 0,10%,20%and 30%and concrete strengths were C30,C40 and C50 were se-lected.Through some experiments,the mechanical properties and carbonation depths of fly ash concrete in 28 d and 90 d are obtained ,the influence of fly ash content on early mechanical properties and carbonation depth were analyzed.The results showed that with growth of concrete age,the mechanical properties and carbonation depth of fly ash concrete increase.The higher the fly ash content ,the larger the growth degree of standard cube compressive strength,split tensile strength and carbonation depth.The growth degrees of axial compressive strength and elastic modulus of different fly ash content were close.The higher the concrete strength ,the smaller the growth degree of stan-dard cube compressive strength and carbonation depth,the larger the growth degree of split tensile strength.The growth degrees of axial compressive strength and elastic modulus of different concrete strength were close.