【摘要】 研究了单掺粉煤灰、磨细矿渣及它们复合后的复合掺合料对混凝土强度的影响。试验结果表明:单掺Ⅰ级粉煤灰及磨细矿渣混凝土的3d、7d强度低于未加掺合料的混凝土强度,并且随粉煤灰或磨细矿渣掺量的增加,强度降低幅度增加;28d时,单掺Ⅰ级粉煤灰及磨细矿渣混凝土的强度达到未加掺合料的混凝土强度,混凝土的后期强度持续增长。在相同掺量时,Ⅰ级粉煤灰/磨细矿渣复合掺合料混凝土的各龄期强度高于相同掺量Ⅰ级粉煤灰混凝土及磨细矿渣混凝土,磨细矿渣/Ⅰ级粉煤灰的合理比例为7∶3。更多还原

【Abstract】 In this paper,the effects of fly ash,ground slag and composite admixture of them on the strength of concrete were investigated.The results showed that the strengths of concrete with grade one fly ash or slag at ages of 3,7d were less than that of concrete without grade one fly ash or slag respectively.However,the strength of former at 28d was as same as that of latter.The strength decreased significantly as the amount of grade one fly ash or slag increasing.The strengths of concrete mixing with composite admixture were more than those of concrete with fly ash or slag and the best ratio of ground slag and grade one fly ash was 7∶3.更多还原