This seal not only resists the downward penetrtion of water into the subsoil ,but also retard the upward passage of water from the subsoil into the construction above.

• 固化完毕，应立即在上泼洒沥青乳胶，形成防水层。这不仅防止水分下渗到基层土中，也防止基层土中的水分向上渗透。