| Connect Follow us on Twitter Like us on Facebook
About | Subscribe | Advertise


Get Paint BidTracker's Bridge Painting Opportunities of 2015

Problem Solving Forum

| More

May 21 - May 27, 2012

What tests should be run to determine if an existing concrete bridge pier needs rehabilitation or repair before cleaning and coating?

Selected Answers

From Jeremi Day of Allphaz Inspection Services on May 22, 2012:
     There are several non-destructive tests (NDT) that can be used to evaluate the strength of hardened concrete. Two of the most common NDT methods are the Schmidt rebound hammer and the Windsor probe, both of which measure the surface hardness of concrete as a quick indicator of relative compressive strength. The rebound hammer test (ASTM C 805) measures the rebound of a spring-loaded plunger pressed against a concrete surface. The harder the surface, the greater the extent of the rebound, which correlates to relatively greater strength. In the Windsor probe test (ASTM C 803), a powder-actuated gun drives hardened alloy probes into the concrete. The exposed length of the probe is measured, then related by a calibration table to the concrete's compressive strength. The results of these tests can be influenced by a variety of factors, including surface smoothness, type and hardness of aggregates, age and moisture condition of the concrete, and the degree of carbonation at the surface. Therefore, it's important that results be compared with those from cored or cast specimens, and interpreted by NDT specialists who understand the limitations of the tests.

From Otto Drozd of J. Mori Painting, Inc on May 23, 2012:
     Conduct a visual inspection of the surface to be coated to determine if any of the following are present: voids, bugholes, pop-outs, cracks, joints, spalls, fins/slivers, levelness , efflorescence, soundness, oil, grease,wetness/dryness, carbonation, chemical, ASR/AAR, transition areas below/above grade, age of concrete, blisters/other.  Evaluate  the severity of the damage detected and determine if it is critical that rehabilitation work be done.

Please sign in to submit your answer this question    

Tagged categories: Bridges; Concrete; Concrete repair; Site/field testing

Current PSF Question | Submit a PSF Question | Full PSF Archive

Graco Inc.
Graco Mortar Pump

The M680 sprays epoxy-based mortars, anti-skid coatings, cementitious and filled materials. Compact.
Easy to use.
Call 877-844-7226 or

Nationwide Overspray
Profession Overspray Removal Services

The Finest Name in Safe Overspray Removal. We specialize in removing all contaminants from any surface. Family Owned and Operated for 33 years! Fully insured. Satisfaction is guaranteed.

Abrasives Inc.
Check our Prices for Blast Abrasives

Faced with higher abrasive costs? We invite you to call & check our rates on Black Magic® coal slag and other quality blast materials. Abrasives Inc. 800-584-7524

Termarust Technologies
Termarust (HR CSA) Chemically Stops
Active Corrosion

Pipeline Utility Aerial crossings coated since 1992. Termarust's (HR CSA) was used to overcoat lead paint and preserve cables, pipes and support towers.

HoldTight Solutions Inc.

Our HoldTight®102 salt remover & flash rust preventer prevents flash
rust by removing surface contaminants. It has no equal; only wannabees.
Contact us for your
nearest distributor.
(800) 319.8802

Minerals Research & Recovery


“Made in the USA!”

Why recycle waste from other countries? Go FASTER, CLEANER, at 1/3 THE COST with MR&R “All-American” Sharpshot®HP!!


SAFE Systems, Inc.
Enduroguard -
The Tough Cable
for a Tough Industry.

Reduce maintenance costs and down time, increase job site safety with Enduroguard Cable. Available exclusively from SAFE Systems. UL listed, flexible, abrasion resistant and cut resistant.

Wasser High-Tech Coatings Inc.
Wasser Coatings Protect

Wasser Coatings offer a complete range of Moisture Cure Urethane (NEPCOAT approved) systems in addition to Polyurea membranes and linings(NSF).

Chicago Corrosion Group
Vendor-neutral corrosion consulting

What you don’t know about painting is costing you a fortune. Call today to see how CCG’s vendor-neutral, owner’s advocacy saves our clients millions.

W Abrasives - Surf Prep Pack

Experts in surface preparation are not working only on greens. To discover the SURF PREP PACK dedicated to experts, come to visit us during the GIFA (Hall15 - D14).

Technology Publishing

The Technology Publishing Network

The Journal of Protective Coatings & Linings (JPCL) PaintSquare
Durability + Design Paint BidTracker

EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us

© Copyright 2000-2015, Technology Publishing / PaintSquare, All rights reserved
2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951; Tel 1-412-431-8300; Fax 1-412-431-5428; E-mail