CAJ | 학술논문

研究了不同掺量铁尾矿粉对高强混凝土强度的影响，并通过扫描电镜和压汞仪对混凝土的水化产物和孔结构分布特性进行了分析。结果表明，铁尾矿替代胶凝材料20％和30％时，其混凝土达到C60混凝土的强度等级。当铁尾矿为40％时，其混凝土试样达到C50混凝土的强度等级。不同铁尾矿掺量混凝土试样中的孔主要以20~50 nm的少害孔为主。不同掺量铁尾矿粉的孔隙率、平均孔径等有所不同。铁尾矿掺量20％和30％试样的水化产物较为密实，而铁尾矿掺量40％的试样水化产物较为疏松。
연구료불동참량철미광분대고강혼응토강도적영향，병통과소묘전경화압홍의대혼응토적수화산물화공결구분포특성진행료분석。결과표명，철미광체대효응재료20％화30％시，기혼응토체도C60혼응토적강도등급。당철미광위40％시，기혼응토시양체도C50혼응토적강도등급。불동철미광참량혼응토시양중적공주요이20~50 nm적소해공위주。불동참량철미광분적공극솔、평균공경등유소불동。철미광참량20％화30％시양적수화산물교위밀실，이철미광참량40％적시양수화산물교위소송。
The effect of iron tailing powder on the strength of high strength concrete was studied. The hydration products and pore struc-ture distribution of concrete was analyzed by SEM and MIP. The results show that the concrete strength grade reaches C60 when the re-placement of iron tailings for 20% and 30% of cementitious material,and the concrete strength grade reaches C50 when the replacement of iron tailings for 40% of cementitious material. The pore in concrete is mainly the 20~50 nm. When the content of iron tailings in con-crete changes,the power porosity and average pore size in concrete are different. The hydration products is dense when the replacement of iron tailings for 20% and 30% of cementitious material,and the hydration products is loose when the replacement of iron tailings for 40%of cementitious material.