关键词: 泡沫混凝土;特殊钢尾渣;环保;正交设计;BP神经网络;优化制备

Abstract: Environmental protection foam concrete with steel slag as fine(special steel tailings foam concrete)was prepared with special steel tailings as admixture.The effects of every preparation factor on dry density and 28 d strength of special steel tailings foam concrete were studied by orthogonal design and back-propagation neural network.The results show preparation process parameters of special steel tailings foam concrete is amount of cement content 74.9 part,amount of special steel tailings content 30.2 part,amount of fly ash 12.8 part,ratio of water to material 0.455 and amount of foaming agent 309.7 g,its dry density 628.49 g/cm3 and 28 d strength 2.675 MPa.Established the BP neural network model accuracy is high,such as relative error of experimental results and model calculation is only 3.854％and 3.925％.Special steel tailings were wrapped in special steel tailings foam concrete,not only improved the mechanical properties of special steel tailings foam concrete,but also enhanced the applicability and safety of special steel tailings.

Key words: foam concrete;special steel tailings;environmental protection;orthogonal design;back-propagation neural network;optimizing preparation