PaintSquare.com
Follow us on Twitter Follow us on LinkedIn Like us on Facebook Follow us on Instagram Visit the TPC Store
Search the site

 

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

Advertisements
 
SAFE Systems, Inc.
 
Portable Dust Collectors for Tough Environments
 
Trailer and skid-mounted models in numerous sizes, powered by electric and/or diesel. Sloped roofs, multiple dust inlets, high static, dampered fans. Lockable power & drive compartments.
 

 
 

 
International Bridge Conference
 
Bridge conference 2018
 
Registration for the 2018 IBC is now open! Join us in June for the biggest and best IBC ever! View the Program, Workshops and Exhibitors by clicking in the banner.
 

 
HoldTight Solutions Inc.
 
NO FLASH RUST - NO CONTAMINANTS
 
Our HoldTight®102 salt remover & flash rust
preventer prevents flash
rust by removing surface contaminants. Contact us
for your nearest distributor.
(800) 319.8802 sales@holdtight.com
 

 
BASF
 
New resins from BASF will have metals loving water!
 
Excellent corrosion resistance, low VOC, high gloss, thin films www.basf.us/industrialcoatings dpsolutions@basf.com 800-231-7868
 

 
Blastox/The TDJ Group, Inc.
 
Blastox® - One Step Lead Abatement
 
Sandblast additive delivered to jobsite pre-blended to eliminate hazardous abrasive wastes. Why mix, meter or apply at the job-site? Blast with ease and
Let your painters paint!
1(800)-252-7869
 

 
KTA-Tator, Inc. - Corporate Office
 
New KTA Pipeline Inspection Kit
 
• Defelsko standard memory body
• Positector FTS 0-250 mils, cabled dry film thickness probe
• NEW Positector Shore D hardness probe
• All essential inspection equipment!
Visit www.ktagage.com
 

 
CHLOR*RID International Inc.
 
SOLUTIONS THAT WORK
 
Companies that invest in corrosion control use CHLOR RID products
  • Soluble salt removal liquid
  • Test kits to verify contamination levels
  • Surface passivation to hold the blast
INFO@CHLOR-RID.COM 800.422.3217
 

 
NLB Corporation
 
NLB Sure Shroud: Greater Protection and Flexibility
 
NLB’s Sure Shroud’s lighter weight and flexibility reduces operator fatigue and offers unmatched protection against high pressure hose ruptures. 10k to 40k psi rated.
 

 
Fischer Technology Inc.
 
Maximize Profits by Monitoring Coating Thickness
 
Learn more by contacting Fischer Technology today: 1.860.683.0781
 

 
 
 

Technology Publishing Co., 1501 Reedsdale Street, Suite 2008, Pittsburgh, PA 15233

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL webmaster@paintsquare.com


The Technology Publishing Network

Durability + Design PaintSquare the Journal of Protective Coatings & Linings 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 PaintSquare.com   |   Privacy Policy   |   Terms & Conditions   |   Support   |   Site Map   |   Search   |   Contact Us