Case Studies

Underground tunnel for pedestrian traffic

broadcom-8

Underground tunnel for pedestrian traffic

System used:
Guardian-PD
Freedomtuff 6160 epoxy primer
Freedomtuff 2202 polyurea
Freedomtuff 6600 mvr epoxy primer

Project description: Broadcom is building a 1.1 million sq.ft. Campus in irvine, ca.  One part of the expansion includes building an underground  pedestrian tunnel connecting each of the 4 building.  Freedom worked closely with d7 and shimmick to design and spec a waterproofing system that would last and speed up the construction of the project.

Application:
The Broadcom campus included a total of 4 buildings   the total surface are of the tunnel was 50,000 +.  They were going to be pouring in sections and needed to be able to apply a waterproofing system on some areas in less than 28 days of the pour.  For these areas that were older than 7 days of cure but less than 28 days of cure we used 16 mils of ft-6600 mvr.  After the primer was applied a total of 100 mils of ft-2202 polyurea was applied.  A “belt & suspenders” approach was used so drain board was hung on top of the polyurea to help move the water away from the walls and ceiling.

Results:  the polyurea system was chosen due to its durability, seamless application, fast turnaround time, and extremely low permeability rating.  The polyurea was sprayed and the drain board was installed over the polyurea the same day. The tunnel was backfilled the next day which speed up the critical path by several weeks saving money on the construction cost.