The influence of compound additive on magnesium oxychloride cement/urban refuse floor tile

The magnesium oxychloride cement floor tile was produced by using magnesium oxychloride cement and urban refuse. In order to improve the physical performances of the magnesium oxychloride cement floor tile, phosphate, stearic acid–styrene acrylic acids copolymer emulsion were adopted. It was educed that the compound additive could reduce the water-absorption and warp distortion, improve intenerating coefficient, and greatly ameliorate the degree on magnesium salt out of magnesium oxychloride cement floor tile. Phosphate can react with magnesium and produce difficult dissolving complicated hydrated products and gels, which can fill the capillaries, decrease the contact probability between inner structure substances and exterior water, and it improves the water-resistance of the product consumedly. The hydrophobic groups of the copolymer emulsion can penetrate into pores and capillaries of magnesium cement partially and arrange directionally, which compacts the structure, improves surface characteristics of pores and enhances the water-resistance.