Slab Rocking is concrete slabs constructed on unbound sub-bases can cause ‘steps’ at joints, the main cause being movement of the sub-base. As heavy vehicles such as forklifts travel over a joint, the slab on the approach side is deflected downward. When the wheel leaves, it quickly deflects upwards creating a gap of low pressure between the slab and the sub-base drawing minute amounts of material from beneath the departure slab to the other side of the joint.

Contact Foundation Technology Today

To learn more about Foundation Technology and the services we offer Visit us online at: https://foundationtechnology.com/ or call: 855.650.2211

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Foundation Technology was contacted to provide repair solutions for an integral piece of machinery at their Rancho Cucamonga foundry, which was settling due to poor soil conditions, vibration, and the extreme high weight of the machine itself.

Foundation Technology Delivered Amazing Results

The complete project took six days, start to finish, and was completed during a bi-annual plant maintenance shut down, thereby minimizing production issues. Maintenance and engineering from Gerdau were quite amazed and pleased with the speed and proficiency in which the job was completed. The machine pedestal is level, and initial reaction is positive to the reduction in vibration around the shear operation from the HMI polyurethane foam injection. Costs associated with this project versus the previous lift and level repair, are less than sealing the access holes 30%, offering even more total project satisfaction.

To learn more about Foundation Technology and the services we offer Visit us online at: https://foundationtechnology.com/ or call: 855.650.2211

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foundation technology industrial

Foundation Technology

Primary NAICS Code: 238110 Concrete Repair, Restoration Foundation Repair-Leveling Foundation Raising

Why Foundation Technology?

Foundation Technology strives to give customers only the best value and became the leader in foundation repair, concrete lifting, seismic retrofitting and structural support systems for commercial and industrial applications in California.

Capability Statement
Our specialty is the repair and restoration of any type of foundation support or concrete structure for roadway, bridgework, industrial machinery, commercial and residential buildings, due to movement or failure from seismic activity, erosion, water, drought, and the preventative repair or modification to the
foundation support structure to increase structural rigidity or load capacity of structures to withstand failures from seismic, water, drought and increase load capacity from additions or modification.

Some Core Competencies:

• Foundation/Structural Support-Repair & Leveling – Machinery/Equipment Platform Repair
• Polyurethane Concrete Raising-Restoration – Airport Runway Leveling/Raising/Restoration
• Geotechnical Construction -Soil Stabilization, Chemical/ Cement Grouting, Caissons/Grade Beams
• Hillside Stabilization – Erosion Control/Soil Nails/Erosion Mats

Call (661) 294-1313 to speak with one of our foundation repair experts!

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Foundation Technology was contacted to provide repair solutions for an integral piece of machinery

 

Gerdau North America is one of the leading producers of Rebar in the United States. Rebar is used in bridges, buildings, skyscrapers, homes, warehouses, foundations and roads to increase the strength of the concrete and ultimately help hold up the structures. With construction booming, their product is in high demand.

Foundation Technology offered the following services:

  • Machinery Support
  • Leveling Pump Pad/Support Repair
  • Concrete Restoration
  • Heavy Machine Isolation
  • Epoxy Injection
  • Below Grade Waterproofing
  • Chemical Grouting Pressure Grouting Void Filling
  • Polyurethane Foam Slab Raising Geotechnical Foams Helical/Push Piers

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Slab Rocking

Concrete Slab Rocking

Concrete slabs constructed on unbound sub-bases can cause ‘steps’ at joints, the main cause being movement of the sub-base. As heavy vehicles such as forklifts travel over a joint, the slab on the approach side is deflected downward. When the wheel leaves, it quickly deflects upwards creating a gap of low pressure between the slab and the sub-base drawing minute amounts of material from beneath the departure slab to the other side of the joint. After many passages from the vehicles, a significant amount of material is moved across the joint, resulting in ‘stepping’, ultimately leading to slab cracking and slab rocking. The edges are pressed against each other causing spauling of the slab and eventual pockets, resulting in “bumps” or “ruts” that slow forklift traffic substantially. Damage and spills are often the outcome.

HMI Polyurethane Foam

Injection of polyurethane concrete lifting foam to stabilize and lift the slab, eliminating “Slab Rock” and can reduce the down time over conventional repairs from days and weeks to just hours. Slab Rocking occurs and can be eliminated in almost all heavy vehicle traffic locations.

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FOUNDATION TECHNOLOGY

BEIJING INTERNATIONAL CAPITAL AIRPORT RUNWAY REPAIR PROJECT

PRESS RELEASE

Foundation Technology, (Foundation Tech, Inc.), managed the repairing of damaged and settled concrete runway slabs at the Beijing International- PEK- Capital Airport, Beijing, China.

For more information contact: Jerry Bronstrup (jbronstrup@FoundationTechnology.com)


Foundation Tech, Inc., a California consulting and repair contractor specializing in soil stabilization and foundation repair solutions and services was selected by the largest China based airport repair and maintenance contractor to assist in repair of the Beijing Capital- PEK Airport runways.

Severe drought conditions over the past eight years in Beijing have caused a large fissure in the subsoil directly underneath the Beijing Capital Airport, extending over 2.3 kilometers. The fracture crosses directly underneath two of Beijing’s three main runways, causing severe settlement of the 60-90 cm deep concrete runway and taxiway slabs. Settlement of 7cm to 25cm for the five meter square two layered slabs has occurred along the complete length of the 2.3 kilometer crack. This has caused hazardous conditions for not only airport vehicle traffic but also for aircraft landing and taxiing along the affected areas.

Multiple attempts to repair the settled slabs on both the runways as well as taxiways has offered poor results due to the continued widening of the crack and the subsequent soil erosion and slab settlement along the entire runway. Grinding and pouring an overlayment including pumping concrete into the crack[s], to level the hundreds of five square meter slabs was not a viable option due to the time frame to cure, as well as logistical issues with installation crews and construction equipment being on an active runway.

Jerry Bronstrup of Foundation Technology suggested utilizing HMI polyurethane foam for a quick and lightweight alternative over conventional replacement methods to both level the affected slabs and fill the voids which was very effective. Ground penetrating radar was used to determine the total breadth and width of the fissure. It was then decided to utilize HMI’s RR401 heavy lift geotechnical foam due to its fast tact free time and high compressive strength skin that avoids concrete adhesion. The Wisconsin Manufacturer’s 4lb. per cubic foot foam was perfect for the job and would stand up to the airport runways and taxiways heavy loads. Subsequent onsite tests were performed to prove the feasibility of the RR401 polyurethane foam as a viable alternative for slab lifting and void fill. Over 120,000 lbs. of foam was required to complete the project.

RR401

GEOTECHNICAL POLYURETHANE FOAM

Heavy-duty polyurethane foam perfect for D.O.T. & industrial concrete repair.

RR401 is a 4 lb. per cubic foot dual component foam engineered to be stronger for lifting larger slabs. This foam will stand up to heavy loads and high traffic, and exceeds specifications required by Federal and State transportation departments across the U.S.A.

Foundation Tech, Inc. is a California contractor specializing in soil stabilization and foundation repair solutions, products, and installation services.

They offer consulting, project management, and installation services worldwide.

For more information call or visit them online: foundationtechnology.com

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