CAJ | 학술논문

为研究镉污染砂经水泥固化前后电阻率的变化规律以及固化镉污染砂的固化效果，试验测试了不同孔隙比、不同含水量以及不同镉污染含量下砂的电阻率和固化砂在每个龄期、不同镉离子含量下的电阻率以及固化砂经浸出毒性试验后的镉离子浓度。结果表明，镉污染砂的电阻率随孔隙比增大而增大，但在含水量逐渐增加时其增幅逐渐减小；电阻率随含水量、镉离子含量的增加而减少；固化镉污染砂的电阻率在各个镉离子含量下基本保持不变；固化砂浸出的镉离子浓度随镉离子含量增加呈增大的趋势，且在100~500 mg/kg和1000~2500 mg/kg范围浸出镉离子浓度较接近；随着固化砂的龄期和电阻率增大，浸出的镉离子浓度减少。
위연구력오염사경수니고화전후전조솔적변화규률이급고화력오염사적고화효과，시험측시료불동공극비、불동함수량이급불동력오염함량하사적전조솔화고화사재매개령기、불동력리자함량하적전조솔이급고화사경침출독성시험후적력리자농도。결과표명，력오염사적전조솔수공극비증대이증대，단재함수량축점증가시기증폭축점감소；전조솔수함수량、력리자함량적증가이감소；고화력오염사적전조솔재각개력리자함량하기본보지불변；고화사침출적력리자농도수력리자함량증가정증대적추세，차재100~500 mg/kg화1000~2500 mg/kg범위침출력리자농도교접근；수착고화사적령기화전조솔증대，침출적력리자농도감소。
To study the variation of resistivity of cadmium contaminated sand both before and after cement solidification and the solidification effect of cement solidified sand, the electrical resistivity of sand under different void ratio, different moisture content and different cadmium pollution content, the resistivity of solidified sand at each age and different cadmium ion content and the cadmium ion concentration after solidified sand leaching were tested. The results show that the resistivity of cad-mium contaminated sand increased with the increase of void ratio, but the resistivity increased grad-ually when the moisture content increased, and the resistivity decreased with the increase of moisture content and cadmium ion content;that the resistivity of cement solidified cadmium polluted sand was kept unchanged under different cadmium ion content;that the filtered cadmium ion concentration of solidified sand increased with the increase of cadmium ion content, and the filtered cadmium ion concentration is close in the range of 100~500 mg/kg and 1 000~2 500 mg/kg;that the concen-tration of cadmium ion decreased with the increase of age and resistivity of solidified sand.