Monolithic protective waterproofing system

Abstract

A monolithic protective waterproofing system for light rail and intermodal class I railroad bridges comprehends a multiple layer product installed in-situ. It includes a sprayed on primer, a sprayed on membrane having a thickness of between 60 and 120 mils, a second sprayed on layer of membrane having a thickness of about 20 mils that is utilized as an adhesive that is rapidly covered with a resilient mat having a thickness of between approximately 6 and 12 mm, a second layer of a sprayed on primer and a top coat of sprayed on membrane of approximately 30 to 50 mils. Both the product and method of installation are disclosed.

1 . A multiple layer waterproofing product for bridge decks comprising, in combination,
 a first primer layer adhered to a substrate,   a first membrane layer thicker than said first primer layer adhered to said first primer layer,   a second membrane layer adhered to said first membrane layer,   a layer of resilient mat defining air filled voids and having a thickness of at least 6 mm adhered to said second membrane layer by flow of said second membrane layer into said voids,   a second primer layer adhered to said resilient mat, and   a third membrane layer thicker than said second primer layer adhered to said second primer layer.   
     
     
         2 . The multiple layer waterproofing product of  claim 1  wherein said primer and membrane layers are one of polyurethane, polyurea, methyl methacrylate, a polyurethane hybrid, bitumen or an acrylic. 
     
     
         3 . The multiple layer waterproofing product of  claim 1  wherein said resilient mat includes virgin rubber, reclaimed rubber, ground rubber, vinyl, polyvinylchloride or polyvinyl acetate. 
     
     
         4 . The multiple layer waterproofing product of  claim 1  wherein said bridge deck is fabricated of wood, concrete or steel. 
     
     
         5 . The multiple layer waterproofing product of  claim 1  wherein said resilient mat is disposed on such bridge deck in transverse or longitudinal, parallel panels. 
     
     
         6 . The multiple layer waterproofing product of  claim 1  wherein said resilient mat is disposed on such bridge deck in transverse or longitudinal, parallel strips having a width of approximately four feet. 
     
     
         7 . The multiple layer waterproofing product of  claim 1  further including a third membrane layer disposed on said layer of resilient mat and a second layer of resilient mat disposed on said third membrane layer, said third membrane layer and said second layer of resilient mat disposed between said layer of resilient mat and said second primer layer. 
     
     
         8 . A method of providing monolithic waterproof protection for a bridge deck, comprising the steps of;
 applying a first primer layer to such bridge deck,   applying a first membrane layer thicker than said first primer layer to said first primer layer and allowing said first membrane layer to cure,   applying a second membrane layer to said first membrane layer,   applying at least one layer of a resilient mat containing air filled voids and having a thickness of at least 6 mm to said second membrane layer while said second membrane layer is liquid,   applying a second primer layer to said resilient mat, and   applying a third membrane layer thicker than said second primer layer to said second primer layer.   
     
     
         9 . The method of providing monolithic waterproof protection of  claim 8  wherein said membrane layer applying steps are achieved by spraying. 
     
     
         10 . The method of providing monolithic waterproof protection of  claim 8  wherein said first and said second primer layers are approximately 20 mils thick. 
     
     
         11 . The method of providing monolithic waterproof protection of  claim 8  including the additional first step of cleaning such bridge deck by sand or metal shot blasting. 
     
     
         12 . The method of providing monolithic waterproof protection of  claim 8  including the additional steps of applying an additional second membrane layer to said resilient mat layer and applying an additional layer of said resilient mat to said additional second membrane layer while said additional second membrane layer is liquid. 
     
     
         13 . The method of providing monolithic waterproof protection of  claim 8  wherein said first primer layer is applied by spraying, squeegeeing or rolling. 
     
     
         14 . A multiple layer waterproofing product for bridge decks and similar structures comprising, in combination,
 a first membrane layer disposed on said bridge deck having a thickness of approximately 60 to 120 mils,   a second membrane layer adhered to said first membrane layer,   a layer of resilient mat defining air filled voids and having a thickness of from approximately 6 mm to 12 mm adhered to said second membrane layer by flow of said second membrane layer into said voids,   a primer layer adhered to said resilient mat, and   a third membrane layer thicker than said primer layer adhered to said primer layer having a thickness of approximately 30 to 50 mils.   
     
     
         15 . The multiple layer waterproofing product for bridge decks and similar structures of  claim 14  wherein said resilient mat includes virgin rubber, reclaimed rubber, ground rubber, vinyl, polyvinylchloride or polyvinyl acetate and said air filled voids constitute approximately 40% by volume. 
     
     
         16 . The multiple layer waterproofing product for bridge decks and similar structures of  claim 14  wherein said resilient mat is disposed on such bridge deck in transverse, parallel strips. 
     
     
         17 . The multiple layer waterproofing product for bridge decks and similar structures of  claim 14  further including a third membrane layer disposed on said layer of resilient mat and a second layer of resilient mat disposed on said third membrane layer, said third membrane layer and said second layer of resilient mat disposed between said layer of resilient mat and said primer layer. 
     
     
         18 . The multiple layer waterproofing product for bridge decks and similar structures of  claim 14  further including an additional primer layer disposed between said bridge deck and said first membrane layer. 
     
     
         19 . The method of providing monolithic waterproof protection for a bridge deck of  claim 8  further including the step of applying pressure to said resilient mat containing air filled voids to cause a portion of said second membrane layer to flow into said voids of said resilient mat. 
     
     
         20 . The multiple layer waterproofing product for bridge decks and similar structures of  claim 14  further including a primer layer adhered to such bridge deck and to which said first membrane layer is adhered.