Method of applying a self-adhesive waterproof membrane to an external wall and base slab of an underground construction

Abstract

A method for applying a self-adhesive waterproof membrane to an external wall and base slab of an underground construction prior to the casting work includes applying a concrete layer on a working site and a protective layer on a diaphragm wall or retaining wall of the external wall, applying a rubbery asphalt waterproof membrane on the concrete layer and the outside of the protective layer. A rubbery asphalt layer of the membrane is facing directly to the underground structural body. A step of applying a protection concrete on the membrane that is applied on the concrete layer is added after the rubbery asphalt membrane applied step. Then, applying a steel frame or reinforcing steel to adjacent membrane and a formwork to an inner face of the external wall is added. Finally, pouring concrete to a space defined by the external wall and the formwork to allow direct contact of the rubbery asphalt of the membrane to the protection concrete and the concrete; and curing the concrete for around 7˜14 days to allow secure engagement of the waterproof membrane to the base slab and the external wall by capillarity induced by the solidfying process of the concrete so as to completely form a plant-root like waterproof layer to the concrete are added to complete the process.

What is claimed is:  
     
         1 . A method for applying a self-adhesive rubbery asphalt waterproof membrane to an external wall and base slab of an underground construction, the method comprising: 
 (a) applying a concrete layer on a working site and a protective layer on a diaphragm wall or retaining wall of the external wall;    (b) applying a rubbery asphalt waterproof membrane on the concrete layer and the outside of the protective layer, wherein a rubbery asphalt from the membrane is facing directly to the underground construction;    (c) applying a protection concrete on the membrane that is applied on the concrete layer;    (d) applying a steel frame or reinforcing steel to adjacent membrane and a formwork to an inner face of the external wall;    (e) pouring concrete to a space defined by the external wall and the formwork to allow direct contact of the rubbery asphalt of the membrane to the protection concrete and the concrete; and    (f) curing the concrete for around 7˜14 days to allow secure engagement of the waterproof membrane to the base slab and the external wall so as to completely form a waterproof layer to the concrete.    
     
     
         2 . The method as claimed in  claim 1 , wherein the rubbery asphalt has extensions flowing to porous structure of the protection concrete and the concrete so as to form a waterproof layer to the base slab and the external wall and block the porous structure.  
     
     
         3 . The method as claimed in  claim 1 , wherein in the curing process of the concrete, the concrete dissipates heat at a temperature about 45-60° C. to melt the rubbery asphalt.  
     
     
         4 . The method as claimed in  claim 3 , wherein the molten rubbery asphalt is adhered to the base slab and the external wall by capillarity.  
     
     
         5 . A method for applying a waterproof membrane to an external wall and base slab of an underground construction, the method comprising: 
 (a) applying a concrete layer on the working site and a protective layer on a diaphragm wall or retaining wall of the external wall;    (b) applying a rubbery asphalt waterproof membrane on the concrete layer and the outside of the protective layer, wherein a rubbery asphalt that is from the membrane is facing directly to the underground construction;    (c) applying steel frame or reinforcing steel to adjacent membrane and a formwork to an inner face of the external wall;    (d) pouring concrete to a space defined by the external wall and the formwork to allow direct contact of the rubbery asphalt of the membrane to the concrete; and    (e) curing the concrete for around 7˜14 days to allow secure engagement of the waterproof membrane to the base slab and the external wall so as to completely form a waterproof layer to the concrete.    
     
     
         6 . The method as claimed in  claim 5 , wherein the rubbery asphalt has extensions flowing to porous structure of the protection concrete and the concrete so as to form a waterproof layer to the base slab and the external wall and block the micro pores on the surface of structure.  
     
     
         7 . The method as claimed in  claim 5 , wherein in the curing process of the concrete, the concrete dissipates heat at a temperature about 45-60° C. to melt the rubbery asphalt.  
     
     
         8 . The method as claimed in  claim 7 , wherein the molten rubbery asphalt is adhered to the base slab and the external wall by capillarity.