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
 
Detail Masters
 
Overspray Removal
 
We offer professional, turnkey service and unparalleled quality!
Our process can save hundreds— even thousands of dollars. It's fast, environmentally safe and 100% guaranteed.
 

 
Tarps manufacturing, Inc.
 
QUALITY MADE IN AMERICA —Available near you!
 
CLICK to get a behind-the-scenes look at how Tarps Manufacturing makes the highest-quality tarps right here in the USA — available nationwide.
 

 
SABRE Autonomous Solutions
 
Introducing the ALPHA1 Blasting Robot
 
Once installed and commissioned – simply
SCAN PLAN BLAST.
 

 
SAFE Systems, Inc.
 
Portable Blast &
Recovery Equipment
 
Trailer or skid mounted blast and recovery equipment. Systems designed for maximum versatility, environmental compliance
and overall cost savings.
Call 1-800-634-7278
 

 
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
 

 
ARC / A.W. Chesterton Company
 
Superior Impact & Wear Resistant Lining
 
100% solids, impact resistant, ceramic reinforced, epoxy/urethane hybrid lining for severe abrasive wear and impact resistance.
 

 
Jotun Paints Inc.
 
Jotun Jotachar 1709
 
Mesh-free passive fire protection epoxy designed to protect against hydrocarbon pool fire scenarios for up to four hours as defined in the ANSI/UL1709 standard.
 

 
Carboline Company
 
New product: Carbozinc® 608 HB
 
Introducing a new high build zinc-rich primer that can save you time and money by eliminating the epoxy intermediate coat!
 

 
Mitsubishi Gas Chemical America
 
Performance Amine 1,3-BAC
 
A highly reactive cycloaliphatic diamine offering superior performance. Reasonable cost and curing efficacy makes it suitable for all types of epoxy resin applications.
 

 
 
 

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 (Updated 1/8/2018)   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us