不锈钢渣水泥基材料抗碳化性能试验及预测模型分析OA

Stainless steel slag admixture was prepared by using stainless steel slag and granulated blast furnace slag,and the carbonation resistance test of stainless steel slag cement-based materials were carried out.The composition and microstructure of stainless steel slag cement-based materials were observed by X-ray diffraction(XRD),scanning electron microscopy(SEM)and pore structure analysis.Combined with mechanical properties,the effect of stainless steel slag admixture on its carbonation performance was studied,and a nonlinear regression prediction model of carbonation depth was established.The test results show that as stainless steel slag admixture content increases,the carbonization depth of cement-based materials increases.Among them,the carbonation depth of the T5 group(The content of stainless steel slag admixture is 70%)reached 21.5 mm at 56 days,which was 3.4 times that of the blank group.Microscopic structure analysis shows that as the amount of stainless steel slag admixture increases,the matrix pores increase.Based on the comprehensive mechanical and carbonation properties and combined with microstructure analysis,the content of stainless steel slag admixture controlled within 50%is appropriate.The carbonation depth prediction model achieved a root mean square error(RMSE)of 0.975 56 mm,a mean absolute error(MAE)of 0.730 68 mm,and an R2 value of 0.911 42,indicating strong agreement between the predicted and measured values and demonstrating the model's high reliability.