通过不同配合比的纤维矿渣微粉混凝土在3 d、7 d、14 d、28 d、56 d和90 d的抗压试验,研究矿渣微粉掺量、纤维掺量、试件尺寸以及龄期对混凝土抗压强度的影响。结果表明,矿渣微粉的加入提高了混凝土各龄期的强度,同时强度的提高和钢纤维的加入使混凝土的尺寸效应更加明显。在分析试验结果的基础上,提出了考虑龄期、纤维掺量和矿渣微粉掺量影响的纤维矿渣微粉混凝土抗压强度计算公式。 Through the compressive tests of 3, 7, 14, 28 d, 56 d and 90 d on the different ratios of the fiber slag concrete, the effects of the amount of the fine powder of the slag, the fiber content, the size of the sample and the age on the concrete Impact of compressive strength. The results show that the addition of slag powder can improve the strength of concrete at various ages. At the same time, the increase of strength and the addition of steel fiber make the size effect of concrete more obvious. Based on the analysis of the experimental results, the compressive strength formula of the fiber slag concrete considering the age, the fiber content and the amount of the slag powder is proposed.