干湿循环中磷石膏基防渗材料的防渗和剪切特性

宋牧原,王宜将,杨微,郎丰飞,陈伟,刘雪莹

Impermeability and shear strength of phosphogypsum-based impermeable materials under drying-wetting cycles

Muyuan SONG,Yijiang WANG,Wei YANG,Fengfei LANG,Wei CHEN,Xueying LIU

表 1 水洗和原状磷石膏的理化指标

Tab.1 Physical and chemical indexes of washed and original phosphogypsum

参数 pH w / % w0/ % w(Ca2SO4·2H2O) / % w (P2O5)/ % w (F−) / % w (As) / (mg·kg−1) w (Pb) / (mg·kg−1) w (Cd) / (mg·kg−1) Ira Ir 限值 — — ≤15 (Ⅰ) ≤20 (Ⅱ) ≥90 (Ⅰ) ≥80 (Ⅱ) ≤0.20 (Ⅰ) ≤0.30 (Ⅱ) ≤0.10 (Ⅰ) ≤0.20 (Ⅱ) <30(Ⅰ) <85(Ⅰ) <100(Ⅰ) ≤1 ≤1 水洗 3.5 23.3 0.42 96.33 0.09 0.05 3.81 10.8 1.37 0.43 0.36 原状 2.5 42.3 5.25 93.13 0.37 0.23 4.32 12.6 1.72 — —