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Archive for the ‘Surface-Prep Field Tests’ Category

Your Surface-Prep Briefing for August 2017

Wednesday, August 9th, 2017

Remove Faster News Briefing

News for Safer, Sustainable Surfaces

August 2017

san francisco symposium

SFO Airfield Marking Symposium Invitation

Remove markings without damage or water! Join SMITH at the San Francisco Airfield Marking Symposium, August 15-16, 2017. Read more.

surface prep

The Power of Surface Prep

When we shine a light on the value of specifying, performing, inspecting, and paying for proper surface-prep work, everyone benefits. That’s the power of surface preparation work. Read more.

Barn Grooving Done Right

Barn grooving is an important, cost-effective way of preventing cows from slipping, falling, and getting hurt. The grooves catch hooves before they slip, and the channels are ideal for moving standing water. Read more.

SMITH Red Tag Savings Event

During our annual inventory count, our sales team asked if we can offer our customers something special this summer.  

Introducing our Red Tag inventory event going on now!  We have red tagged SMITH cutters, drums, cutter drum assemblies, machine parts (new and used) and more that we’re going to GIVE AWAY. Why? Because we can! Read more.

APWA Public Works Expo Invitation

We invite you to visit us at APWA booth #1309 August 27-28, and see how SMITHing creates safer, sustainable surfaces on your walkways, bikeways, and roadways. Read more.

Your Surface-Prep Briefing

Friday, June 30th, 2017

Remove Faster News Briefing

News to help you Create Safer, Sustainable Surfaces

Visit Your SMITH Stocking Resellers

surface preparation

SMITH partners with top pavement maintenance and concrete flooring maintenance dealers and resellers with a proven track record of delivering high-performance solutions to their customers. Read more here.

Marking Removal – Drum or Rotary?

surface preparation

On March 22, 2017, Steven Smith presented Marking Removal 101 at the ATSSA How-To Conference to help stripers decide which style of pavement-marking remover (drum or rotary) is better.

This presentation will help the user select the right equipment to remove and replace pavement markings cost-effectively without ghost lines or grooves. Read more here.

Perfect Prep Conversation Starter

surface preparation

When a customer walks into your business and notices the SMITH banner, amazing things happen that can lead to new business opportunities! Read more here.

Surface Prep Inspection Tests

To confirm the profiled surface is properly prepared, the inspector conducts the following field tests: Key ScrapeTape PullSurface Profile, and Cut DepthRead more here.

July 4th Holiday Hours

The fourth of July is the day we commemorate the adoption of the Declaration of Independence. On that day 241 years ago, the Second Continental Congress declared that the 13 American colonies regarded themselves as a new nation – the United States of America. 

In celebration of our nation’s birth, we will be closed on Monday July 3rd, and will reopen for business on Wednesday July 5th.

If you need help, you can be sure that we will reply promptly. Contact us.

Surface Preparation Inspection Tests for Concrete and Pavements

Wednesday, June 21st, 2017

Surface Preparation Inspection Tests for Concrete and Pavements

To confirm the profiled surface is properly prepared, the inspector conducts the following field tests: Key Scrape, Tape Pull, Surface Profile, and Cut Depth. These tests are performed before, during, and after the surface is prepared, prior to the new coating or overlay application, with provisions provided under specifications and acceptable engineering practices.

Key Scrape Test: This test determines the surface integrity prior to starting any surface profiling or preparation work. With the serrated side of a key, lightly scrape the surface. If the key dislodges aggregate or some of the surface, it would receive a failing “F” grade. A passing “P” grade indicates the surface is structurally sound.

Should the key test fail after the surface-profiling work, the inspector shall give immediate notice for the contractor to remedy at contractor’s expense prior to receiving acceptance notice. The contractor shall not be held responsible for the repair of any pre-existing failed surface conditions under or adjoining the coating or repair material. If discovered, the contractor shall notify the engineer of the defect to take corrective action as specified under the contract plans.

Tape Pull Test: This test is used to determine surface cleanliness prior to the coating application. Cut a 10” length of duct tape and hand tamp the adhesive side to the prepared area. Quickly peel the tape off the surface and reposition the tape with the adhesive side up. Measure the captured dirt/debris and record the results. If dirt covers more than 1”, representing 10% of the overall coverage area, the surface requires additional cleaning. Continue cleaning until the inspector gives a passing “P” grade.

Surface Profile Comparison: Confirm that the desired profile (SP#1-10) of the surface has been achieved by visually inspecting and comparing the prepared surface and outlying areas to the profiles depicted by replica profile pads, replica putty, replica tape, or SP photos. Record all findings in a journal. Should the profiles not meet the specified range, the inspector shall give immediate notice for the contractor to remedy at contractor’s expense.

Cut Depth Test for Surface Shaving or Grooving: Measure the slot cut depths using depth plates or a dial depth gauge. Take several measurements to obtain an average to accurately measure the depth of the slot. Should the slot dimensions and surface conditions not be met, the inspector shall give immediate notice for the contractor to remedy at contractor’s expense. 


Prep-before-coating specifications should be intentionally separate from the materials application specification portion of the project to assure all parties (contractor, engineer, and inspector) have clear guidelines and expectations on what is and is not acceptable surface conditions for the new application. The specifications should describe the prep process controls to achieve the correct SP roughness, surface soundness and cleanliness to assure the successful bond between the binder and the surface.

The details of the location of the prepared surface work shall be designated on the plan drawings, or as required by the engineer. The contractor and engineer should evaluate the surfaces prior to commencing work so that all parties can acknowledge and record existing concrete and/or joint conditions. The contractor shall schedule and coordinate the surface-prep work with the engineer prior to the start of any coating, marking, repair, or overlay work.


Surface Profile (SP) is the measure of the average distance from the peaks of the surface to the valleys as seen through a cross-sectional view of the hard surface.

The dimension is defined pictorially and through physical samples in the SP Profile Chart as is expressed by a Surface Profile Number SP1 – 10 (SP1 is a nearly flat, smooth surface; SP10 is extremely rough with amplitude greater than 1⁄4”). Surface profiles can be accomplished by a variety of tools, equipment, and materials, and is dependent upon the type of surface to be prepared, plus the type of system and material thickness to be installed. All factors play an important role in the selection process.

For further details, please contact your SMITH Rep.

© 2017 SMITH Surface-Prep Solutions - 1610 S. Dixie Highway, Pompano Beach, FL 33060-8913
Toll Free: 1-800-653-9311 | Ph: 954-941-9744 | Fax: 954-545-0348
Specifications and data are subject to change without notice.