Project Profile:
I-10 EARTHQUAKE REPAIRS
Project: I-10 Santa Monica Freeway (Northridge Earthquake Repairs)
Location: Los Angeles, California
Date: February 1994 - April 1994
Engineer: Caltrans
Concrete Contractor: C.C. Myers Inc.
Concrete Producer: Catalina Pacific, Associated Ready Mix
Product Used: Rapid Set® Cement and Rapid Set® Flowable Fill
The January 17, 1994, Northridge 6.6 Earthquake did immense damage to many of the region's vital traffic arteries. One serious disruption was the closing of the I-10 Santa Monica freeway due to the collapse of two bridges. The I-10 is the busiest freeway in the nation.
The Los Angeles region was estimated to suffer economic losses of up to $1 million a day, due to the freeway's closure. Contractor C.C. Myers was awarded the job to completely rebuild the two bridges with a significant bonus of $200,000 a day for early completion. C.C. Myers used Rapid Set® Control Density Fill (CDF) to backfill the bridges' approach slab areas. While normal CDF would not have been able to receive loads for several days, Rapid Set® CDF was set up to receive a load within 30 to 60 minutes after it was placed into the holes.
Rapid Set® Concrete was placed over the Rapid Set® CDF, which allowed heavy equipment to access the remaining work on the bridge decks. Normal concrete procedures require the approach slab concrete to set up for 4 days before allowing traffic. Rapid Set® Concrete reduced the time to 2-3 hours per location. Using Rapid Set® CDF and Rapid Set® Concrete saved over five days on the construction schedule. C.C. Myers finished the job 74 days ahead of schedule and received a $14.5 million bonus.
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