Wishing you all the joys of the season and happiness throughout the coming year.
Wishing you all the joys of the season and happiness throughout the coming year.
We want to wish you a Happy Thanksgiving!
Wishing you abundance, hope, peace and a festive holiday season. Happy Thanksgiving to you!
Ground Works Solutions, Inc., a URETEK polyurethane chemical grouting injection provider in 31 U.S. states, recently hosted a webinar on restricting groundwater and contamination migration through the use of an Injectable Barrier™ system. The webinar was well attended and highly informative. To learn more – go to this link.
Costs are costs, and one of the major costs for cities is continuous Inflow and Infiltration (I/I) into sewer systems. The increased water into the sewer system leads to higher pumping costs, increased degradation of pumps, higher treatment costs of water that shouldn’t need treatment, and other potentially costly issues such as soil degradation, further damage to the pipe and sinkholes that could cause roadway or structural failure. So how do you deal with I/I and how can you pay for the I/I mitigation?
CST’s URETEK polymer injection applications provide unique solutions for I/I mitigation. We have the proven results of reducing I/I while also having a very quick payback in reducing the associated costs (a recent study shows that I/I in Tennessee equals 44%!).
The URETEK Technologies are highly effective, having the combined effect of sealing the lateral line or manhole while also reestablishing the weight bearing capacity of the soil. The way it works, is a high density structural polymer is injected along the pipe in multiple zones. Once the polymer is injected, it aggressively seeks out the voids and pushes away any water along the structure, forming a water tight seal. The polymer encapsulates the pipe and the joints are sealed against I/I. The injections can occur from the surface or within the pipe itself. View projects and learn more about the process here!
Concrete Stabilization Technologies, Inc. is committed to partnering with our local municipalities, engineers ,and maintenance personnel to provide effective solutions for maintaining and extending the life of infrastructure. Whether it be streets and sub grade, curb and gutter, water and wastewater systems or structures, we have advanced technology to address settlement, erosion, and infiltration issues cities, towns, and counties commonly experience. Our non-destructive, no excavation technologies and processes are the superior alternative to tear out and replace or traditional methods such as compaction grouting. Proven, long lasting, viable solutions extend the use life of municipal infrastructure while keeping you in control of your assets. CST has been solving infrastructure rehabilitation, soil stabilization, and concrete settlement issues for 19 years. Emergency rapid repair, maintenance and rehabilitation services are available for Colorado, Wyoming, Montana, and Utah.
Streets & Subgrade Stabilization
We stabilize weak, poorly compacted or moisture compromised soils of all kinds, in-situ while leveling structures (including pavements) by injection of high-density structural polymer. At-depth injections eliminate common subsurface soil issues. Utilizing the most advanced technologies, our process drives out water, fills underground voids and fissures and expands to densify the ground.
Rehabilitation with polymer Deep Injection Technology is ideal for streets, highways, bridge abutment and approach stabilization, rehabilitation, pavement/curb & gutter alignment and support, taxiways, runways, tunnels, and infrastructure with settlement problems caused by poor underlying soil compaction and moisture issues.
We provide rapid repair of pavement and structures, washout and sink holes, and voids.
Utility Repair & Rehabilitation
Infrastructure Rehabilitation: Regardless of age or construction of a structure, inflow, infiltration, and exfiltration through cracks, and leaking joints, cause additional expense in both unnecessary water treatment, and repair of settled roadways, sidewalks, and other structures. Our in situ, zero excavation rehabilitation methods allow for injection of a high density, hydro-insensitive polymer to quickly eliminate infiltration into degraded infrastructure and lift, realign, and where needed, stabilize overlying roadways by densifying weak soil, and increasing the collective load bearing capacity.
Manhole Sealing & Encapsulation: We seal, stabilize, and stiffen weak soils around leaking manholes, encapsulating buried infrastructure where soil erosion has created shifts in the drainage structure as well as infiltra-tion of soil. Our technicians are well trained to understand infrastructure systems and how to correctly install polymers to complete the restoration of an infrastructure asset.
Lateral Line Sealing & Stabilization: Sagging lateral lines along with joint and radial cracks cause major disruptions and inefficiencies in storm and sewer drainage systems. As the expanding structural polymer (ESP) is injected, material expansion begins to compact and fill voids around the lateral lines. Outcropping of polymer occurs, confirming voids are filled, as well as eliminating further infiltration.
Corrugated Metal Pipe Repair: Our CMP repair process extends the life of the culvert, eliminates all existing void space, and stabilizes the soil be-neath the culvert. In situ repairs thus restore proper flow. Costs and disruption are greatly reduced, when compared to traditional tear out and replace. When working for railroads, there is no track downtime involved. For cities and towns, no road closures, and traffic interruption is minimal.
CST uses the URETEK Technologies and is the Rocky Mountain Region’s licensed URETEK affiliate. URETEK has proven success with over 100,000 projects, a world wide network of engineers, affiliates and satisfied customers.
Key Benefits for Engineers, Municipalities, and Government Agencies:
This project investigated a novel procedure for frost heave mitigation to reduce or prevent subgrade freezing by use of a chemical grout injection process at the top of the subgrade. Controlled injection of URETEK 486Star, an expanding structural polymer foam, created a continuous three inch thick layer of insulation that significantly reduced the heat loss from the deeper soil and prevented the upward movement of water from the warmer regime under the foam to the upper frozen regime above the foam, preventing segregational freezing in the upper zone. The construction time for the 170 foot section was one week for injection and milling the surface. Construction was contained in one lane, leaving a lane open for the entire duration without a detour, increasing safety and minimizing impact for the driving public.
Additionally, a procedure is developed for estimating the thickness of the foam layer required for other sites with different average temperatures.
A standard technique to control frost heave is to place several layers of foam insulation panels below the sub-base course. This requires a full reconstruction of the site. A process was proposed to inject a three inch thick layer of a two part structural polymer foam, URETEK 486Star #3, at the bottom of the sub-base without removing the existing road surface.
Concrete Stabilization Technologies, Inc (CST) injected the foam through a series of 3/4 inch diameter, 18 inch deep holes drilled through the road surface on a 6 foot grid. Three inches of foam were injected over the area with the most heave. Additional injections provided tapered zones to smooth the transition from the original road surface to the full thickness zone.
The process required two trucks and a four person crew to complete the work in four days. All the work was performed in one traffic lane at a time while keeping the other lane open for traffic. Because of the poor road surface before the injection, the surface was milled at a later time. The subsequent road surface was sufficiently leveled to make the mediation unnoticeable.
The upper figure shows the measured elevation changes from the summer baseline along the center of the east bound lane.
The lower figure shows the elevation changes along the centerline of the west bound lane. Substantial heave is shown where the foam thickness is only 1.0 to 1.5 inches.
The heavy black line in the below graph shows the thickness of the foam being about 3 inches under the east bound lane and tapering to zero under the west bound lane.