ICRI Technical Guideline
No. 03732 - Photos courtesy of International Concrete
Selecting and Specifying Concrete
Surface Preparation for Coatings, Sealers, and Polymer
Overlays. This document and comparator set provides
a useful written and visual guide to selecting an appropriate
method of concrete surface preparation prior to the
installation of a coating, lining, or other protective
system. Discusses the unique aspects of 12 different
surface preparation and cleaning methods: detergent
scrubbing, low-pressure water cleaning, grinding, abrasive
blasting, shotblasting, scarifying, needle scaling,
high- and ultrahigh-pressure waterjetting, scabbling,
flame blasting, and milling/rotomilling.
After the substrate is prepared it must be inspected
to insure that the substrate is sound and structurally
durable. Areas found to be unsound or non-durable must
be replaced. Dust or other deleterious substance not
removed after the initial surface preparation must be
vacuumed, leaving the surface dust free and clean.
Appendices discuss selection
processes, sealers and coatings, safety, and additional
reference standards. Published by the International
Concrete Repair Institute (ICRI).
Click image for details
Download the Concrete Surface Profiles
Power trowels offer a great option for smoothing large
concrete slabs and getting the slab to a hard, level
finish. (click here)
JD Tech offers waterproofing
resins from Allied Construction Technologies, Inc.
(ACT) specialists in moisture mitigation vapor coatings,
the NEW! Oil Buster® System, and more.
The newOil Buster® System
treatment is a two component; two step cleaning
and coating system for concrete substrates that
are contaminated with oil/hydrocarbons and need
to be permanently sealed. This is an ideal product
for sealing and rescuing older slabs when re-purposing
a structure to avoid costly demolition and hazardous
material waste cost.
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JD Technical Group Inc.
is dedicated to exceptional products, service
and response to the construction industry forMoisture
Mitigation, both positive and negative
side waterproofing, crack injection, primers and
cementatious underlayment's for the flooring industry
With the philosophy that the industry high standard
is accomplished through professional organizations
like ACI, ICRI, CSI, AIA, Starnet Flooring and
Waterproofing is needed
anytime a structure is built at ground level or
below ground. Waterproofing and drainage considerations
are especially needed in cases where ground water
is likely to build up in the soil and raise the
water table. This higher water table causes hydrostatic
pressure to be exerted underneath basement floors
and against basement walls. Hydrostatic pressure
forces water in through cracks in foundation walls,
through openings caused by expansion and contraction
of the footing-foundation wall joint and up through
floor cracks. Hydrostatic pressure can cause major
structural damage to foundation walls and is likely
to contribute to mold, decay and other moisture
Which is the best waterproofing
solution for a specific situation? JD Technical
Group Inc. attaches great importance to training in
order to get the greatest value for the building owner.
Contractors and other interested persons are frequently
trained to ensure that they posses in-depth theoretical
and practical knowledge about our products and about
waterproofing technology in general. Get your ACT®
For waterproofing, vapor-proofing,
oil contamination remediation, resurfacing concrete
substrates, or crack injection, JD Technical Group
Inc. has the solution. With combined experience of
over 50 years, our technical and sales staff continues
to offer the best recommendations and products for
remediation of the toughest jobs.
& shotblast concrete to a
magnetic rake to collect fugitive
shot & vacuum when done.
Part A into Part B & Mix for
3 minutes at <400 rpms.
contents of unit out and use notched
squeeges to spread.
with 3/8" nap roller and allow
Nuisance or Necessity
The subject of vapor
barriers or retarders beneath concrete slabs on grade
has long been controversial. Some justifiably argue
that slabs placed in direct contact with a vapor barrier
or retarder are more susceptible to curling and other
slab problems than those cast on a granular base. They
consider a vapor barrier or retarder a downright nuisance.
A brief description
of alternative methods for dealing with slab moisture
problems by Peter A. Craig. Moisture-related problems
with floor coverings and coatings applied over concrete
slabs have become a serious and costly issue for designers,
constructors, manufacturers, installers, and owners.
Problems are being experienced on both new and renovation
day has come, the project is complete, and everyone
involved is eager to show off the new look of the facility.
But wait a minute. Something is terribly wrong. Adhesive
is bleeding through joints between the floor tiles,
and there are bubbles in the sheet goods and epoxy flooring.
Worse yet, there is a noticeable odor in the air. Sabotage?
No, unfortunately what is occurring on this project
has become all too common across the country. Such problems
are being caused by moisture and moisture-induced high
pH levels beneath flooring materials.
It pays for to take
charge of the process of creating detailed moisture
and pH testing specifications that direct the entire
construction team as to what is expected of them so
potential problems can be identified and solved in advance.
JD Technical Group Inc. can
provide testing on-site conditions and services for
your next project. Pre-installation and/or post-installation
services are available.
You know why Hans and Franz
didn’t go into pervious concrete contracting? They
couldn’t pump it up.
When it comes to saving your
building materials from water damage, a moisture
vapor barrier is the right product for the job.
There are plenty of instances when a vapor barrier
is going to make a tremendous difference in the moisture
content, the damage from
mildew and mold, or humidity in a building. If
you are not sure of the waterproofing products that
should be used, call, email
or fill out our contact
These definitions are intended to
promote general familiarity with common terms of the concrete
Admixture: a natural
or manufactured chemical which is added to concrete before,
or during, its mixing. Admixtures are often deployed to
add special properties to concrete.
Ambient RH: the
relative humidity surrounding a concrete slab. The RH of
air in a room or in the open qualifies as ambient.
ASTM: American Society
for Testing and Materials: a global body which develops
voluntary consensus standards in construction.
Calcium Chloride testing:
a moisture content assessment procedure which measures the
water evaporation rate at the surface of concrete.
Cement: a substance
which binds other materials together, such as aggregate
and water, to form concrete.
Concrete: a composite
mixture of cement, aggregate and water.
Concrete moisture meter:
a measurement device which assesses the relative humidity
level of concrete.
Curing: the process
by which concrete hardens due to the chemical process of
process by which the relative humidity of a building material,
such as concrete, is balanced with the RH of its surrounding
environment; also used to refer to the process of an in
situ probe reaching similar or balanced conditions (temperature,
moisture levels, etc) to the surrounding concrete.
Hydrostatic pressure: units
of pressure which are created by a liquid when it is at
In Situ probe: a
sensor which must be embedded in a concrete slab (typically
by drilling a hole into the slab and installing a sensor
within a sleeve) in order to assess the slab's moisture
act of moving concrete RH probes to several test places
in a concrete slab without allowing sufficient time for
the probes to equilibrate.
Moisture content (MC):
the term used to describe the amount of water vapor within
a concrete slab.
a relative humidity(RH) measurement device which contains
a sensor and a separate plastic, cylindrical sleeve. Builders
place the sleeve inside a hole drilled in concrete, then
insert the sensor into to cylinder to measure concrete RH.
Â Multi-use probes can be re-calibrated in order to be re-used
on another job site.
MVER: Moisture Vapor
Emissions Rate which indicates the rate of moisture evaporation
from the surface of concrete. MVER is a result of Calcium
Chloride (CaCl) testing.
a widely-used form of cement which hardens in contact with
water to produce a water-resistant product.
the process of smoothing a concrete slab surface using motorized
Relative humidity (RH):
the term used to describe the ratio of water vapor in the
combined mix of air and water; relative humidity is also
used to express the ratio of moisture content in concrete.
RH testing: a procedure
which determines the amount of water vapor (or relative
humidity) in concrete.
the point at which a building's concrete slab is fully enclosed
and the heating, ventilation and air conditioning (HVAC)
systems are up and running.
a relative humidity(RH) measurement device designed for
use on a single job site. A single-use probe is typically
skim-coated into the slab once testing is complete.
the temperature of concrete below the surface of the slab.
Substrate: a structural
reinforcement beneath a concrete slab; or, the concrete
slab or subsurface directly beneath a flooring finish.
Vapor barrier: a
building material, such as plastic or foil sheeting, which
serve to slow (or retard) moistures permeation from external
sources into a concrete slab.