Trial study on magnetism of Potland cement

Start with cement magnetism,concrete's magnetism is studied.By basic theory and experiment method of magnetics,Pot-land cement's magnetism is studied.It can be known by the hysteresis curve gained by experiment result that Potland cement and composite cement have some iron-magnetism characteristics under function of added magnetic field,while the white cement shows weak magnetism.It has been given that the index value is2.0Gs when indentify cement magnetism on base of quantitative analysis of the characteristics.