Non-Destructive Testing and Material Sampling Services in Florida

by Chris Ball February 1st, 2015 in News
VCS at the Sunshine Skyway Fishing Pier

Extensive concrete and corrosion evaluations are common on major infrastructure like bridges, piers, wharfs, natural draft and mechanical draft cooling towers, and parking structures.

But there are many instances when owners and engineers have simple questions which can be answered by employing testing on a limited scale and budget.  For example, coastal buildings like condominiums have balconies that can experience deterioration due to saltwater exposure. Some of these costal buildings may even have cathodic protection systems which need regular maintenance or troubleshooting.

New concrete construction projects such as bridge construction and building construction can have defects which need concrete troubleshooting such as misplaced reinforcing or low strength concrete which can be detected with non-destructive testing.

Owners can greatly benefit from the evaluation services provided by VCS. VCS uses non-destructive testing (NDT), concrete sampling, and laboratory testing to determine the cause and magnitude of concrete and corrosion problems.

The following is a partial list of testing services available. For more information contact info@vcservices.com

 Concrete strength

- Removal of cores for compressive strength testing

- Ultrasonic pulse velocity for non-destructive strength determination

- Tensile strength of concrete estimated by pull off testing per ICRI Technical Guideline No. 210.3 and ASTM standards

Bond of coatings, concrete repairs, and concrete overlays

- Tensile pull off testing per ICRI Technical Guideline No. 210.3 and ASTM C1583

 Locate concrete rebar or post-tension tendons prior to drilling or coring

- Ground penetrating radar (GPR)

 Post-tensioning evaluation

- Visual inspection

- Impact echo testing to identify voids and grout defects

- Video borescope testing

- Post-tech moisture testing of unbonded tendons in building and parking structures

 Chloride penetration

- Core or concrete powder sampling and laboratory testing to determine chloride profile in concrete per ASTM C1152 or ASTM C1218

- Can be used for Service Life Modeling as per ACI Life 365 and other methods

 Locating reinforcing steel and post-tensioning in concrete structures

- Pachometers with pulse induction and microprocessor technology, Profoscope concrete cover meter and rebar locators and ground penetrating radar can be used to locate reinforcing steel and locate post-tension tendons prior to concrete coring and to determine how close reinforcing steel is to the surface of concrete

 Concrete thickness

- Impact echo testing

- This information in conjunction with pulse velocity estimation of compressive strength and reinforcing steel location using GPR can be used to determine load ratings on structures without drawings

 Concrete deterioration

- Visual inspection

- Hammer sounding, chain dragging and rotary percussion using Delam Tool are used to identify concrete delaminations per ASTM D4580

- Impact echo / pulse velocity testing to locate concrete delaminations, cracking and other deteriorated concrete for repair per ASTM C1740 and ASTM C1383

 Steel deterioration

- Ultrasonic thickness measurements of steel plates

- Anchor bolt testing for wear and corrosion

 Concrete Rebar Corrosion

- Half cell corrosion potential testing of concrete per ASTM C876

- Corrosion rate testing using GalvaPulse galvanostatic pulse measurements

- Carbonation depth on concrete core samples

 Pile lengths

- Determine the length of in situ timber piles, sheet piles, and concrete piles using sonic or magnetic methods

 Confirmation of Crack Depths

- Ultrasonic testing before and after epoxy injection crack repairs for quality assurance

 Location of voids / void detection

- Using impact echo or MIRA ultrasonic tomography to identify honeycombed or poorly consolidated concrete

- GPR to detect voids under concrete slabs and behind walls and tunnel liners

- Impact echo to identify voids in grouted post-tensioned tendons

The corrosion engineers and NDT Technicians at VCS can cost-effectively reach project sites in Sarasota, Saint Petersburg, Orlando, Jacksonville, Tallahassee, Naples, Fort Myers, Fort Lauderdale, and Miami from the Tampa office.

Click on the link below to find out where VCS is located in the Tampa Bay area: