ABSTRACT
Polymer Rubber Gel (PRG) waterproofing technology is effective and proven for the challenges of underground construction. Key characteristics for PRG waterproofing systems: (1) superior substrate adhesion, (2) responsiveness to substrate movement, (3) non-curing, (4) self-healing, (5) chemical resistance, and (6) environmentally friendly. PRG technology combined with durable, flexible, fleece, reinforced HDPE creates a dynamically responsive waterproofing assembly. This blindside system comprises the following (1) 20-mil HDPE fleece sheet installed against the lagging, (2) PRG is spray applied at a thickness of 100 to 115-mil, (3) 20-mil HDPE fleece sheet is embedded into the PRG. Shotcrete or concrete is installed against the assembly. This system is a high-performance membrane providing the benefits of fluid and rigid protection. This technology is successfully used for waterproofing large-scale subway stations. This paper describes (1) PRG’s characteristics of a high-performance waterproofing system, (2) PRG providing effective solutions for shotcrete and blindside applications.
