Pavement Design and Testing in San Antonio
Building Pavement That Survives Both Clay and Rock
As commercial infrastructure scales along the I-35, Loop 1604, and Wurzbach Parkway corridors, the physical demands on pavement systems are real. Designing a commercial parking lot, loading dock, or access road takes more than pouring asphalt over flat dirt, and San Antonio’s subgrade isn’t uniform across the metro. Taylor Marl clay on the south and east side pushes and pulls at pavement as it swells and shrinks, while caliche and shallow limestone on the north and west side present a different subgrade behavior entirely, dense but prone to uneven support if not properly prepared. A pavement system engineered for one won’t necessarily hold up on the other. Skip that engineering and you’re looking at alligator cracking and potholes well before the surface should be failing.
- Commercial Parking Lot Developers
- Industrial Facility Owners
- Municipal Road Projects
- General Contractors
- Industrial Sites
- Municipal Infrastructure
- Mixed-Use Developments
- Healthcare Facilities
Independent Engineering, Not a Paving Sales Pitch
Asphalt and Rigid Concrete Pavement Engineering
San Antonio GeoTech provides rigorous testing for large-scale pavement projects across the metro. We are not a paving contractor selling you a bid; we are an independent engineering firm delivering unbiased structural data that meets TxDOT standards and local building codes.
Asphalt and Rigid Concrete Pavement Engineering
There’s no one-size-fits-all solution in pavement engineering. A standard retail parking lot for passenger cars needs a very different structural cross-section than an industrial distribution center handling daily 18-wheeler traffic. We analyze projected axle loads and regional climate data to engineer the exact thickness of the surface course, the crushed limestone base material San Antonio has in abundance, and the treated subgrade needed to distribute those loads without fracturing the surface.
Subgrade Evaluation and CBR Testing
Long-lasting pavement starts with the dirt underneath it. Our technicians run California Bearing Ratio and Dynamic Cone Penetrometer testing to measure the strength of the native soil. On the clay side of town, if the subgrade tests too weak or reactive, we engineer chemical stabilization, specifying exact percentages of lime, fly ash, or Portland cement to be milled into the soil. On the limestone and caliche side, the challenge shifts to making sure that dense but uneven material compacts consistently before the base course goes down. For sites with grade change, our team also provides retaining wall design engineered to the same standard.
Real Advantages of Engineering This Properly
Why Developers Invest in Professional Pavement Design
Securing an engineered pavement design provides real financial and operational advantages for your commercial asset:
- Lower Lifecycle Costs: Properly engineered pavement needs far less maintenance and resurfacing over its 20-to-30-year lifespan.
- Heavy Load Optimization: Loading docks and truck staging areas are reinforced to prevent buckling under static heavy loads.
- Prevent Drainage Failures: Designs work with civil grading plans to shed water correctly, keeping moisture from destroying the subbase.
- Quality Control Verification: Continuous field testing during construction verifies compliance with the engineered spec.
Frequently Asked Questions
What is the difference between flexible and rigid pavement?
Flexible pavement, asphalt, bends and deflects slightly under heavy traffic, distributing load through layers of crushed stone and stabilized subgrade. Rigid pavement, concrete, acts as a stiff structural slab, spreading the load over a wider area of the subgrade without bending.
More From Our Field Team
Why does pavement crack and form potholes so quickly here?
Premature pavement failure in San Antonio is usually tied to trapped water combined with an untreated subgrade, whether that’s expansive clay or unevenly compacted caliche. Water seeping through minor surface cracks washes out the subbase, removing support and letting the surface cave in under traffic.
Do you test existing pavement that's starting to fail?
Yes. For older commercial properties, we perform forensic pavement evaluations, taking cores and analyzing the existing subbase to determine why the surface is failing and recommend the most cost-effective rehabilitation.