Tstrata Enlargement Systems™

Structural Strengthening with Tstrata Enlargement Systems™

Tstrata Enlargement Systems™ consist of specialty designed reinforcement systems combined with high-flow Tstrata concrete to produce an additional reinforced concrete layer that is fully bonded to existing structural members. Our systems combine specific surface preparation, specialized materials, and pressurized formwork to produce monolithic concrete enlargements to increase or restore the load-carrying capacity, ductility and seismic resistance to a variety of concrete structures.

Tstrata Enlargement Systems™ meet both ICRI 320.IR and ACI RAP-5 requirements for placement of concrete under pressure, and are suitable for all applications, including vertical and overhead installation.



  • Ability to add significant additional capacity to existing columns, beams, walls and slabs
  • Increases axial, shear, and bending capacities of structural members
  • Improves stiffness and ductility of structural components
  • Incorporates steel dowels to supplement shear transfer requirements
  • Can incorporate post-tensioned reinforcement to reduce service stresses and deflection
  • Uniform appearance that blends well with the existing structure
  • Provides high levels of fire resistance
formwork chart st

Pressure sensors inside the Tstrata Pressurized Form Technology™ show high pressure is maintained after concrete placement to ensure superior bond to existing substrate and to minimize shrinkage.

Design Elements

Tstrata Specialty Concrete Mixes™

Tstrata Specialty Concrete Mixes™
Our designs utilize high strength flowable Tstrata Specialty Concrete Mixes™ to allow for improved consolidation in thin enlargements and congested reinforcement zones, as well as improved bond with the existing structure.

Pressurized Forms

Pressurized Forms
Our advanced form and pump technology creates pressure to force the new concrete into the prepared surface, creating a monolithic interface between the existing substrate and the enlargement.

Steel Reinforcement

Steel Reinforcement
Our designs are reinforced with mild steel or post-tensioning to produce the required strength and improve serviceability performance.

Structural Strengthening Design & Engineering Support

Solutions For:

• Change in Code
Seismic Upgrade
• Increased Loads
• Missing or Misplaced Reinforcement
• Deterioration
• Low Concrete Strength
• New Penetrations & Openings
Force Protection
Pipe Rehabilitation

Structural Strengthening Team Leader

Read more about our products and applications on our structural strengthening solution builder page

Tarek Alkhrdaji, PhD, P.E.

Design-Assist & Engineered Product Support

• Investigation Support
• Solution Development
• Budget Development
• Specification Assistance
• Constructability Consulting
• Application Engineering
• Quality Control Programs
• Project-Specific Design-Assist