The polymer liner and cover material were produced with an admixture of re-emulsification type ethylene vinyl acetate (EVA) powder resin to make the low water permeability mine liner and cover material. The purpose of this study is to improve the basic physical properties and water tightness by filling the space between cement and aggregate with EVA polymer film, which result in the improvement of waterproof performance. It was confirmed that basic properties such as strength and dry shrinkage stability were improved until the re-emulsification type EVA powder resin was mixed up to 4%. However, it was confirmed that the physical properties were not significantly improved when 5% of the re-emulsification type EVA powder resin was used, or decreased compared with the case of using 4% of that. As a result of the measurement of the permeability coefficient, the physical properties were improved from 8.30×10^-10 to 5.50×10^-12.

저투수성 광산 차수재를 제조하기 위해 재유화형 ethylene vinyl acetate(EVA) 분말수지를 혼입한 폴리머-차수재를 제조하였다. EVA 수지는 방수성, 및 내구성이 우수하여 여러 산업에서 다양하게 활용되고 있다. 본 연구에서는 시멘트와 골재 사이의 공간을 EVA 폴리머 필름으로 채워 기초 물성 향상 및 수밀성 향상을 통한 우수한 차수성능을 발현하고자 하였다. 연구결과 재유화형 EVA 분말수지 함량이 4%까지는 휨강도, 압축강도, 건조수축안정성등 기초물성이 향상되는 것을 확인하였다. 하지만, 재유화형 EVA 분말수지 5%를 사용할 경우 물성이 크게 향상되지 못하거나 4% 대비 감소하는 것을 확인하였다. 투수계수 측정결과 8.30×10^-10에서 5.50×10^-12까지 저투수성을 발현하는 것을 확인하였다.

Keywords:

Keywords: liner and cover material, ethylene vinyl acetate, permeability coefficient, polymer resin