Xypex products used: Admix C-1000 NF
When the office space called 409 and 499 Illinois was planned for San Francisco’s Mission Bay area, it faced considerable waterproofing challenges. Two six-storey towers were to be constructed over a three-level subterranean parking garage that was adjacent to a filled-in turn-of-the-century shipping channel that provided a water infiltration conduit from the bay to the garage.
With an especially high water table at 8 feet below grade, the possibility of saltwater attack, and a garage design calling for two parking levels at 30-ft below grade, developers faced a far greater concrete waterproofing and protection issue than normal. Aware of the reliable performance of Xypex Crystalline Technology in resisting both extreme hydrostatic pressure and saltwater attack, project engineer Simpson Gumpertz & Heger and designer Dowler-Gruman Architects specified Xypex Admix C-1000 NF to waterproof and protect the below-grade slabs and perimeter walls. Cemex, the project’s ready-mix supplier, blended Xypex Admix into the concrete mix at the time of batching and worked closely with Xypex to initiate a 15-hour, problem-free continuous pour of over 8,000 cu yd.