quality control specification clauses for the impregnation ... - Dry Treat

QUALITY CONTROL SPECIFICATION CLAUSES FOR THE
IMPREGNATION OF POROUS MINERAL
BUILDING MATERIALS WITH META CRÈME
1. GENERAL
1.1 Scope
The material to be supplied is to be applied to the surface of a porous mineral building
material to protect it from the ingress of water, water-borne salts and oil-based
staining. The material is designed to impregnate the surface and permanently bond to
the molecular structure of the material, thus changing its absorption characteristics
whilst maintaining breathability.
Impregnation shall be carried out to surfaces described in the Contract. All works to
be in accordance with relevant Occupational Health and Safety requirements.
2. MATERIAL
2.1 Type
The material used for impregnation must be META CRÈME as supplied by Dry-
Treat Inc.
Measurement Properties
Appearance White, creamy
Density @ 20°C 0.97
Viscosity @ 20°C > 50,000 cSt
VOC (USA EPA Method 24,
including exempt compounds)
< 100 grams per Litre
2.2 Properties and Certificate
Prior to the impregnation works the Contractor shall deliver to site sufficient material
to carry out the entire works. The Contractor shall provide to the Superintendent, on
delivery, a certificate from the Supplier of the Material stating that it includes silanes
in a water soluble emulsion and the quantity delivered to site. No material shall be
used on site until this certificate has been provided and accepted by the
Superintendent.
2.3 Storage
The material shall be stored in a cool, dry area protected from direct sunlight. The
containers are to be kept sealed and protected from damp.
2.4 Handling of Containers
The material containers shall remain sealed until their contents are required for use. If
the material is contaminated it shall be discarded.
3. SURFACE CONDITIONS
3.1 Surface Condition
© QUALITY ASSURANCE SPECIFICATION CLAUSES FOR THE IMPREGNATION OF POROUS
MINERAL BUILDING MATERIAL WITH META CRÈME
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Surfaces to be impregnated must be sound, air-dry and clean. Surfaces must be free
from loose or deleterious matters and residues that may prevent the sealer from
penetrating. Allow newly cement-based grouted installations to cure a minimum of 72
hours.
3.2 Cleaning
If cleaning by water methods, the surfaces must be allowed to stand for a minimum of
24 hours before impregnation commences. Areas to be treated must, where necessary,
be protected from adverse weather conditions and must be surface dry for a minimum
of 24 hours before application commences. Artificial drying of the surface must not
be permitted.
3.3 After Treatment
The treated surface must be left undisturbed (no rain or condensation) as long as
possible (a minimum 12 hours), to ensure proper curing.
4. APPLICATION EQUIPMENT
4.1 Method of Delivery
Generously coat the surface with an even layer of META CRÈME using a foam
roller, low pressure airless sprayer, brush, lambs wool applicator or similar.
4.2 Application Rate
Apply a minimum of one even coat, with a minimum interval between coats of at least
24 hours, shall be made each at the coverage rate of at least 1 quart per 30 to 100 sq.ft.
(1 litre per 3 to 10 sq.m.), depending on surface absorption and depth of penetration
required.
4.3 Testing of Material
During application, the Contractor, when requested, provides to the Superintendent
samples from the spray nozzle or roller tray. This shall be tested to confirm density
value as stated in the material conformity certificate.
4.6 Temperature & Weather Conditions
The outdoor temperature and the temperature of the substrate shall be within the range
of 40 to 95 °F (5 to 35 °C).
4.7 Protection
Painted surfaces, plastic, exposed bituminous materials and joint sealants adjacent to
surfaces to be impregnated shall be masked-off before the treatment. Treated surface
shall be protected from rain and traffic spray during application and for at least twelve
hours after completion. Plants in the vicinity shall be protected against contact with
the material. Any residue formed by the material on glass, wood or metal by contact
shall be removed immediately by an alcohol based cleaning agent.
5. TRIAL APPLICATION AREA & SAMPLING
5.1 Location
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Test controls must be determined for each type of porous mineral building
material to be treated.
On completion of the application on the control area(s) test for the Depth of
Penetration and Determination of Resistance to Stains. The Depth of
Penetration must be determined using the method set out in Clauses 5.3. and
Determination of Resistance to Stains using the method set out in Clause 5.4.
5.2 Method of Sampling
The method of sampling must be the same for all test procedures, and must
be as follows:
(a) After a minimum of 14 days following the last application of META
CRÈME 2 inches (50 mm) internal diameter cores must be cut through the
treated surface ensuring that the core is perpendicular to the surface. The
depth of cut must be 1 ½ inches +/- ¼ inch (40 mm, +/- 5 mm).
(b) Whenever possible, coring must be carried out using a vacuumclamped
coring machine. Where metallic fixings are used they must be
removed subsequent to coring. Fixing holes and core holes must be made
good using an approved repair procedure.
(c) The core must be removed, sealed in a plastic bag, labelled and sent to
an approved laboratory for testing.
5.3 Testing for Depth of Penetration by Dye Treatment
The following test procedure must be used to determine the actual depth of
penetration of the treatment:
(a) Test cores must be obtained as per the procedure in Clause 5.2.
(b) The cores must be oven dried for 24 hours at 100 °F (40°C).
(c) The core must be split diametrically and the split face sprayed with a
water-based fugitive dye.
(d) The area not absorbing dye indicates the zone of treatment. The
minimum distance from the interface of the dyed concrete must be recorded.
This distance must be deemed to be the depth of penetration of the applied
treatment. Should difficulty be encountered in distinguishing this interface a
petrographic microscope must be used.
5.4 Testing for Determination of Resistance to Stains
The following test procedure must be used to determine the resistance to
staining of the treatment:
© QUALITY ASSURANCE SPECIFICATION CLAUSES FOR THE IMPREGNATION OF POROUS
MINERAL BUILDING MATERIAL WITH META CRÈME
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(a) Test cores must be obtained as per the procedure in Clause 5.2.
(b) The cores must be oven dried for 24 hours at 230 °F (110°C).
(c) The cores must have three to 4 drop of olive oil placed on the surface
and leave in place for 24 hours.
(d) Subject the test specimens, successively to the following cleaning
procedures:
Procedure A – Class 5
Clean the test specimen with running hot water for 5 minutes, and then wipe
the surface with a damp cloth.
Procedure B – Class 4
Clean the test specimen manually with weak cleaning agent (a commercial
agent not containing abrasive, with a pH of 6.5 to 7.5), using a natural, nonabrasive
sponge or a cloth, then rinse the surface with running water, and
finally wipe it with a damp cloth.
Procedure C – Class 3
Clean the test specimen mechanically with the strong cleaning agent (a
commercial cleaning agent, containing abrasive, with a pH of 9 to 10).
Example of apparatus: Rotating brush, with hard bristles, having a 3 inch (8
cm) diameter, rotational frequency approximately 500 r/min. Tank for
cleaning agent, equipped with a suitable feeder, and connected to the brush.
Carry out cleaning for 2 minutes, then rinse the surface with running water
and finally wipe it with a damp cloth.
Procedure D – Class 2
Immerse the test specimen for 24 hours in a suitable solvent (e.g. hydrochloric
acid diluted 3 + 97, potassium hydroxide, 7 oz. / quart (200 g/L) solution,
acetone), then thoroughly rinse the surface with running water and finally
wipe it with a damp cloth.
Stain not removed – Class 1
Cleaning is considered to be accomplished if any one of the solvents removed
the stain.
After each cleaning procedure, dry the test specimen in the oven adjusted to
230 °F (110 °C) and subjects them to a visual examination. Examine the
surface with the naked eye or with spectacles if usually worn, at a distance of
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1 foot (25 to 30 cm) in daylight or artificial illumination of approximately 300
lx, but avoid direct sunlight.
Staining must only be reported when oil is visible, if there is no visible effect
i.e. if the stain has been removed record the “cleanability” Class according the
Procedure; if the stain is not removed, proceed to the next cleaning procedure.
5.5 Acceptability of Tests
The sample cores must be taken at the rate stated below and sample cores to
be tested for the Depth of Penetration and Determination of Resistance to
Stains. In any area where the treatment falls below the control standard, that
area is to be retreated.
The minium standard frequency for testing and acceptance limits must be:
i. Frequency of test cores: Per 3,000 sq. ft. (300 sq.m.) treated
ii. Depth of Penetration: > 1/10 th inch (3 mm)*
iii. Determination of Resistance to Stains: Class 5
*varies depending on type of material being treated
6. SAFETY ASPECTS
6.1 Precautions, Safety Directions and Storage
Do not take internally. Avoid contact with eyes and skin. Ethanol is liberated
during curing so use a chemical respirator where vapours occur and, where ventilation
is inadequate. Avoid inhaling vapors. Wear latex gloves and safety goggles
during application. No smoking, keep away from naked lights or ignition
sources. Keep container tightly sealed in a cool, well ventilated place. Use
product before expiry date.
6.2 First Aid
If swallowed, give a glass of water and contact a physician. If skin contact
occurs remove contaminated clothing and wash skin thoroughly. If irritation
persists, contact a physician. If in eyes, hold open, flood with water for at least
15 minutes and contact a physician. If vapours are inhaled, relocate to fresh
air. If symptoms persist contact a physician. The material is of low acute toxicity
but may irritate the skin. Contact with the skin and eyes are to be avoided. The
material is safe for the treatment of concrete in contact with potable water.
6.3 Accidents
Spillage – Take up mechanically or with absorbent material such as sand,
earth or vermiculite. Remove all ignition sources.
© QUALITY ASSURANCE SPECIFICATION CLAUSES FOR THE IMPREGNATION OF POROUS
MINERAL BUILDING MATERIAL WITH META CRÈME
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6.4 Transport
Not regulated for transport of dangerous goods: DOT (Road), IMDG (Ocean),
IATA (Air) Transport.
6.5 Volatile Organic Content (VOC)
VOC (US EPA Method 24, including exempt compounds) is less than 100
g/litre, excluding water and except solvents.
7. WARRANTY
7.1 Requirement
Performance warranty to 15 years is offered when the treated porous mineral
building material meets the above Acceptable Results is applied by a Dry-
Treat Accredited Applicator and.
8. LIMITATION
8.1 Limitation
Product will not prevent surface etching, scuffing or wear. All stains should
be cleaned-up immediately to minimise absorption.
June 2009
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