Mix method- MixOnSite

Clark/Elsinore Rd Water System
Perris, CA

Filling Abandoned 12” Pipe

Rebuilding the infrastructure of California’s 5th largest water district involved filling more than three miles of 12” abandoned water lines. The lengths of pipe to be filled ranged from 1,000 to 3,500 feet.

Geofill LD Class II was used because -- unlike CDF or sand cement slurry -- this flowable material can be pumped distances of up to one mile at low pressures without requiring multiple access points.

The dry mix method involves on-site production of the slurry (cement, fly ash and water). The slurry is then combined with preformed foam either during the pumping or mixing process.

Dry bulk cement and fly ash are used. Specialized equipment of various size and production capacities is used depending on project needs. The volumetric unit shown allows continuous production of approximately 75 cubic yards per hour. Foam can be added at the mixing auger or in-line at the pump. Our high production unit utilizes weight batching and is capable of producing over 100 cubic yards per hour.

With the wet mix method, the slurry (cement, fly ash and water) is produced off-site (typically at a Ready-Mix plant) and delivered in transit mixers. Preformed foam is then added to the slurry in the transit mixer or in-line as it is pumped. The in-line method is generally preferred because it allows for full load deliveries of Ready-Mix which is more cost-effective.

This unit is capable of ~60 cubic yards per hour. Its small footprint is ideal for sites with limited staging space. It is also extremely cost effective for smaller projects.

The proportions of slurry and foam are calibrated to achieve required densities and strengths.