This study investigates the feasibility of partially substituting cement with pre-treated modified solid waste phosphogypsum,along with wood fibers,POM fibers,cement,and fine sand,to produce fiber-reinforced cement boards using the slurry method.The research analyzes the impact of different pre-treated modified phosphogypsum con-tents(10％,20％,30％,40％)on the mechanical and environmental performance of these boards.Results show mini-mal effects on physical properties like density and water absorption due to pre-treated modified phosphogypsum.While the saturated flexural strength declines with increased phosphogypsum content,the effect is insignificant within the 0～20％range.Even without POM fibers,the 3-day compressive strength meets Class A and B Rl-grade fiber cement board requirements at 4.16 MPa.The addition of 1％POM fibers significantly enhance board strength.Moreover,sub-stituting cement with pre-treated modified phosphogypsum has reduced CO2 emissions by about 20％,lowered pollu-tants like sulfur dioxide(SO2)and nitrogen oxides(NOx),and indirectly decreased the content of soluble phosphates and fluorides in the environment.
维普
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