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Archive for the ‘Epoxy Floor Coatings’ Category

SMITH indoors and outdoors with New Tri-Fuel Kohler Engines

Wednesday, November 29th, 2017

tri-fuel engine

SMITH Indoors and Outdoors with
New Kohler Tri-Fuel Engines

Pavement and flooring maintenance contractors can now work indoors or outdoors with the same machine thanks to the SMITH SPS10 Surface Preparators and MV7500 HEPA vacuums outfitted with the Kohler 14HP Tri-Fuel engine

Kohler Benefits:

  • Engines operate on gasoline, LP, or NG fuel
  • LP and NG engines provide savings on fuel, plus cleaner emissions

SMITH Benefits:

  • Prep, groove, remove, and collect, leaving an SP3 – SP10 profile
  • Contractor tested, user-accepted surface-prep success
  • SMITH cutters, removers, and support since 1990

To reserve your SMITH SPS10 or MV7500 with a Kohler Tri-fuel for your next job, please contact your SMITH Representative today.


The Power of Surface-Preparation Work

Tuesday, August 1st, 2017

surface preparation

The Power of Surface Preparation Work

Surface preparation doesn’t start with a broom, air blower or power washer. Surface-prep work starts with a drum or rotary-style wet or dry impact device.
 
Impact equipment of scarifiers, grinders, blasters planers, erasers, or shavers are tools used to alter the surface condition, whereas a broom, air, or power washer simply cleans the surface of accumulated dust, dirt and debris.
 
Changing the surface condition to an acceptable state for whatever is planned “next” is the objective of proper surface-preparation work. Next can be the applied coatings, markings, overlay, or repair materials. Next can also be just improving the conditions of the existing surface conditions, then leaving it alone.
 
The use of an impact tool outfitted with the right tools operating in the “impact zone” will get the surface prepared to the right surface profile (SP) condition without causing the surface to micro-crack or bruise. When the surface is properly prepared at the highest level, a condition we call SMITHing, anything applied to that prepared surface will last longer.
 
 
Surface-preparation work requires specialized equipment, manpower, and time to complete the work properly. Allowing coatings, overlay, or repair materials to be applied to a surface that is too porous or too smooth results in premature bond failures and unsafe surfaces.
 
surface preparation
 
Always remember that an impact device will NOT be used on the job, if
(1) the job doesn’t clearly specify its use, or 
(2) it’s not a final surface condition requirement.
 
When the surface-prep work is clearly specified, it details what the final surface profile conditions will look like and follow a process like this 4-step.  After the profiling work ends, the final step before application is surface cleaning with a brush, blower, or power washer. 
 
To assure surface-prep work starts with profiling and ends with clean-up, all parties should agree:
  • The work will be clearly defined in contracts
  • The work will be given a pay consideration
  • The work requires agreement as to what the final SP surface conditions will look like

 

Proper preparation work can be a rewarding experience for the applicator, the client, and anyone who walks, bikes, rides or uses the surface. 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.
 
 

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. 


Note:

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.

Definitions:

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.