中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2014年
10期
3316-3323
,共8页
重金属污染土%复合注浆材料%凝胶时间%抗压强度%微观结构
重金屬汙染土%複閤註漿材料%凝膠時間%抗壓彊度%微觀結構
중금속오염토%복합주장재료%응효시간%항압강도%미관결구
heavy metal contaminated soil%composite grouting material%gel time%compressive strength%microstructure
采用水泥基复合注浆材料对有色金属矿区重金属污染土进行防渗隔离处理。水泥、粉煤灰和矿渣等主要材料分别以不同组分与水玻璃混合形成3种复合注浆材料。采用倒杯法试验、无侧限抗压强度试验等方法研究不同水玻璃掺量、波美度以及粉煤灰和矿渣掺量对复合注浆材料凝胶时间和抗压强度等力学性能的影响规律。此外，采用XRD和SEM等测试方法，从材料的物相组成及微观结构方面进一步分析了复合注浆材料的力学特性。研究结果表明：凝胶时间随着水玻璃掺量和波美度的增大而延长；粉煤灰可以显著延长凝胶时间，但使用矿渣代替部分粉煤灰会使凝胶时间略有减少。当水玻璃掺量在20%以下时，复合注浆材料抗压强度随着水玻璃掺量的增加而增加，当水玻璃掺量超过20%，抗压强度显著降低；抗压强度随波美度的增加而增大；粉煤灰和矿渣可提高复合注浆材料的抗压强度。
採用水泥基複閤註漿材料對有色金屬礦區重金屬汙染土進行防滲隔離處理。水泥、粉煤灰和礦渣等主要材料分彆以不同組分與水玻璃混閤形成3種複閤註漿材料。採用倒杯法試驗、無側限抗壓彊度試驗等方法研究不同水玻璃摻量、波美度以及粉煤灰和礦渣摻量對複閤註漿材料凝膠時間和抗壓彊度等力學性能的影響規律。此外，採用XRD和SEM等測試方法，從材料的物相組成及微觀結構方麵進一步分析瞭複閤註漿材料的力學特性。研究結果錶明：凝膠時間隨著水玻璃摻量和波美度的增大而延長；粉煤灰可以顯著延長凝膠時間，但使用礦渣代替部分粉煤灰會使凝膠時間略有減少。噹水玻璃摻量在20%以下時，複閤註漿材料抗壓彊度隨著水玻璃摻量的增加而增加，噹水玻璃摻量超過20%，抗壓彊度顯著降低；抗壓彊度隨波美度的增加而增大；粉煤灰和礦渣可提高複閤註漿材料的抗壓彊度。
채용수니기복합주장재료대유색금속광구중금속오염토진행방삼격리처리。수니、분매회화광사등주요재료분별이불동조분여수파리혼합형성3충복합주장재료。채용도배법시험、무측한항압강도시험등방법연구불동수파리참량、파미도이급분매회화광사참량대복합주장재료응효시간화항압강도등역학성능적영향규률。차외，채용XRD화SEM등측시방법，종재료적물상조성급미관결구방면진일보분석료복합주장재료적역학특성。연구결과표명：응효시간수착수파리참량화파미도적증대이연장；분매회가이현저연장응효시간，단사용광사대체부분분매회회사응효시간략유감소。당수파리참량재20%이하시，복합주장재료항압강도수착수파리참량적증가이증가，당수파리참량초과20%，항압강도현저강저；항압강도수파미도적증가이증대；분매회화광사가제고복합주장재료적항압강도。
Cement-based composite grouting materials were used to construct grouting cutoff wall for heavy metal contaminated soil in non-ferrous metal mining areas. Cement, fly ash, and slag as principal ingredients were mixed with water glass in different ways to produce three composite grouting materials. In order to investigate the effect of water glass mixing ratio, Baume degree, fly ash and slag contents on the mechanical properties of the composite grouting materials, particularly their gel time and compressive strength, the beaker-to-beaker method of gel time test and unconfined compressive strength test were conducted. In addition, the phase composition and microstructure of the composite grouting materials were analyzed by the X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques. The test results show that their gel time increases when water glass mixing ratio and Baume degree increase. The gel time increases dramatically when fly ash is added, but decreases slightly if fly ash is partly replaced by slag. When the mixing ratio of water glass is below 20%, their compressive strength increases with the increases of the ratio; when the ratio is above 20%, it significantly decreases. The compressive strength also tends to increase as Baume degree increases, and improves if fly ash and slag are added.
