ITEM 512 TREATING CONCRETE
512.01 Description
512.02 Materials
512.03 Sealing of Concrete Surfaces
512.04
512.05 Soluble Reactive Silicate (SRS) Concrete Treatment
512.06 Treating
512.07 Sealing Cracks by Epoxy Injection
512.08 Waterproofing
512.09 Method of Measurement
512.10 Basis of Payment
512.01 Description. This work consists of sealing and treating concrete surfaces, sealing cracks in concrete, and applying waterproofing to structures.
512.02 Materials. Furnish materials conforming to:
Asphalt cement.................................. 702.01 (PG 64 - 22)
Asphalt primer for................. 702.02 (RC-70 or RC-250),
.... waterproofing..................................................... 702.05
HMWM Resin........................................................ 705.15
Epoxy-Urethane Sealer......................................... 705.23.1
Non-epoxy Sealer................................................. 705.23.2
Soluble Reactive Silicate(SRS)................................. 705.24
Gravity Fed Resin................................................... 705.25
Epoxy injection Materials....................................... 705.26
.... Sand........................ 703 with the following exceptions:
.... Maximum moisture content of 0.5 of the percent of absorption when treated according to California Test 226.
Grading:
|
SIEVE SIZE |
% PASSING MAX. |
|
No. 4 (4.5mm) |
100 |
|
No. 8 (2.36mm) |
90 - 100 |
|
No. 20 (850µm) |
5 -15 |
|
No. 50 (300µm) |
0 - 5 |
Emulsified asphalt primer,................ 702.04 (MS-2, SS-1)
Asphalt for waterproofing...................................... 702.06
Hot applied joint sealer........................................... 705.04
Type 3 membrane primer........................................ 705.04
Waterproofing fabric............................................... 711.24
Sheet Type 2 membrane waterproofing.................. 711.25
Sheet Type 3 membrane waterproofing.................. 711.29
512.03 Sealing of Concrete Surfaces. This work consists of
applying an approved sealer on existing
and new concrete surface areas after the concrete is cured and repairs
completed and cured. Apply the sealer to locations described in the plans.
Apply the sealer listed in the pay item description. Choose a type of sealer if
no sealer is listed in the pay item description.
A. Equipment. Use application equipment recommended by the sealer manufacturer. Use spray
equipment, tanks, hoses, brooms, rollers, coaters, squeegees, etc., that are
clean, free of foreign matter, oil residue and water.
B. Mixing. Mix the sealer according to the manufacturer's recommended procedures.
Furnish the Engineer with
the manufacturer’s application instructions. Don’t mix or apply the sealer
until the manufacturer’s written recommendations are supplied to the Engineer.
Mix materials to a uniform consistency and maintain during application.
C. Storage. Store all sealer components in tightly sealed containers, in a dry
location, and as recommended by the manufacturer. Deliver unopened drums or
containers of the sealer or sealer components to the job site with the
manufacturer's numbered seal intact.
D. Surface Condition. Apply
sealers to surfaces which are dry, free from dust, dirt, oil, wax, curing
compounds, efflorescence, laitance, coatings and other foreign materials.
Repair any structurally unsound surfaces, weak sections or spalled areas before
applying any sealer.
Air dry
concrete surfaces for at least five (5) days after completion of required
curing. Air dry any cavities which require grout filling and curing for five
days. Do not apply sealer until the air drying is complete.
Seal
accelerated cured precast concrete after it has attained the required 28 day
strength and after any cavities which require grout filling have been filled,
cured and air-dried for five days.
E. Surface Preparation. Remove
dust, dirt, oil, wax, curing compounds, efflorescence, laitance, coatings and
other foreign materials from surfaces to be sealed. Use chemicals or other
cleaning compounds if removal requires their use but only use products approved
by the sealer manufacturer. Furnish the Engineer documentation of the sealer manufacturer’s
approval. Apply the sealer within 48 hours of surface preparation.
Install
suitable traps, filters, drip pans and other separation devices in the cleaning
equipment so oil and other foreign material isn’t deposited on the surface.
Use the
following cleaning methods depending on the surface type:
New water
cured exposed concrete surfaces.
- Water blast at 7,000 psi (48 MPa) minimum
Exposed
surfaces of new prestressed concrete box beams
- Clean with
high pressure hot water or steam jenny, or
- Water
blast at 7,000 psi (48 MPa) minimum, or
-
Sandblast, followed by air brooming or power sweeping, to remove dust and sand
from the surfaces and opened pores
Existing
concrete surfaces.
- Water
blast at 7,000 psi (48 MPa) minimum, or
-
Sandblast, followed by air brooming or power sweeping, to remove dust and sand
from the surface and opened pores.
F. Application and Coverage.
1. Epoxy -
Urethane sealers.
Apply each
coat of the Epoxy-urethane sealer at the coverage rate specified on the Office
of Materials Management’s approved list. If no application rate is listed,
apply each coat at 120 square feet per gallon (2.9 square meter/liter).
Only apply
sealer when the surface temperature is 50° F (10°
C) or above
Apply with
a brush, squeegee, roller or spraying equipment and as recommended by the
manufacturer.
Apply one
coat of epoxy and one coat of the urethane top coat. Time between coats shall
meet the manufacturer's recommendation. Use epoxy and urethane from the same
manufacturer. Achieve specified coverage regardless of the number of passes per
coat.
Tint so the
final color is Federal Color Standard No. 17778 - Light Neutral. Pigment content shall be limited so
as not to reduce sealing effectiveness of the second coat. Refer to the plans
for colors for specific projects.
Sags and
runs are not acceptable in the sealer.
For sealed
sidewalks or other horizontal surfaces with repetitive foot traffic or
vehicular traffic, integrate 1-1/2 lbs. per square yard (0.8 kg/m2) of silica sand into the surface of the
second coat to produce a non-skid surface satisfactory to the Engineer.
2.
Non-epoxy sealer.
Apply the sealer
according to the manufacturer's recommended mode of application and under the
observation of the Engineer.
Coverage.
Surfaces
subject to abrasive wear (bridge decks, bridge deck shoulders and sidewalks);
Minimum, one gallon (3.875 liter) of sealer for each 100 square feet (9.0
square meter);
Curbs,
vertical surfaces of beams and deck slabs subject to direct roadway drainage;
Minimum, one gallon (3.875 liter) for each 125 square feet (11.5 square meter)
Other
surfaces (for example, parapets, abutments, pier caps and median dividers) 3.
Minimum, one gallon (3.875 liter) for each 150 square feet (14.0 square
meter)
Apply
sealer on surfaces in a one-pass operation at the required coverage. Acceptable
applications saturate a horizontal surface and take a few seconds before
completely penetrating. Broom in the sealer if recommended by the manufacturer.
Vertical
surface sealer spraying will create runs. Acceptable applications of
penetrating sealer developing 6 to 12 inch (150 to 300 mm) runs below the spray
pattern. Apply additional passes in 10 to 15 minutes if coverage rate is not
achieved with first pass. Apply sealers with brush or roller if recommended by
the manufacturer.
After 10 to
15 minutes, squeegee off excess material on smooth finished or dense concretes
where the required coverage is not absorbed.
For sealed
sidewalks or other horizontal surfaces with repetitive foot traffic or
vehicular traffic, integrate 1-1/2 lbs. per square yard (0.8 kg/m2)
of silica sand into the sealer application to produce a non-skid surface
satisfactory to the Engineer.
Tint clear
non-epoxy sealers with a vanishing dye that will not damage the concrete.
Don’t apply
sealer if the ambient temperature is below 40° F (5°
C) or will fall below 32° F (0° C) within 12 hours after application.
General. Do
not apply sealer if rain is anticipated within 2 hours after application.
Clearly mark where the sealer application stops if not continuous.
G. Test Site/Application Apply sealer to measured coverage areas, both
on a horizontal and vertical surfaces, and on different concrete types,
demonstrating:
The
project’s visual effects for the epoxy/urethane sealer application at the
required coverage rate.
Visually,
the absorption necessary to achieve the specified coverage rate for the
non-epoxy sealer. Use at least ½ gallon (2 liter) of sealer, following the
manufacturer's recommended method of application, for the total of the test
surfaces.
Apply to
the deck, safety curb or sidewalk for the horizontal test surfaces and use an
abutment parapet or pier face for the vertical test surface so different
textures are tested.
H. Appearance. Epoxy/Urethane sealers. uniform
appearance and the final color shall visually match the test section. Re-coating, removal and re-application or
other methods recommended by the manufacturer will be required to correct final
appearance. Non Epoxy Sealers. The sealer
shall result in a uniform appearance.
I. Traffic. Allow traffic on deck shoulder areas after 12 hours of drying time for
an epoxy/urethane sealer. Keep traffic off a non-epoxy sealer until the sealer
appears totally dry.
J. Safety Precautions. Follow precautions defined on the
manufacturer's MSDS.
Provide the Engineer a copy
of the MSDS
sheet for information before any work commences.
K. Protection of Adjoining Surfaces and the
Public. Protect the
public during all operations, especially when applying sealer to the fascia or
the underside portions of a bridge that spans an area used by the public.
During
sealing, mask off, or use other means of protection, for surfaces not being
sealed. Protect asphalt and mastic type surfaces from spillage and heavy
overspray. Do not apply sealers to joint sealants which have not cured
according to the manufacturer's instructions. Joint sealants, traffic paints and asphalt overlays
may be applied to the treated surfaces 48 hours after the sealer has been
applied. Protect nearby steel, aluminum or glass surfaces when non-epoxy
overspray could be deposited on those surfaces.
L. Environmental Requirements. Protect plants and vegetation from overspray by covering with drop
cloths.
512.04 Sealing Concrete Bridge Decks with HMWM Resin This work shall consist of preparing and treating the concrete wearing surfaces
of bridge decks with a penetrating sealer in accordance with these
specifications, in reasonably close conformity with the plans and the manufacturer's
recommendation and as directed by the Engineer.
A. Limitations. Do not perform this work during the period
beginning November 1st and ending March 31st.
B. Surface Preparation. Remove roadway dirt and debris from the area of the
deck to be treated. Sweep, sandblast, then with the use of a manual or power
broom sweep and blow with compressed air so that the surfaces to which the
sealer is to be applied is dry and free of dust and dirt. Use high pressure
compressed air to blow all loose material from visible cracks. Fit the cleaning
equipment with suitable traps, filters, drip pans, driers and other devices to
prevent oil and other foreign material from being deposited on the surface. Do not
allow traffic on the clean surface prior to application of the sealer. Remove
existing pavement markings according to Section 641.10 of the
Specifications. Remove all traces of asphalt or petroleum
products and concrete curing seals by abrasive blasting prior to air sweeping.
C. Installation. Provide a compatible promoter/initiator
system capable of providing the same physical qualities of the hardened resin
as if promoted/initiated with 2% cobalt naphthanate (6%) and 2% cumene hydroperoxide.
Store materials at 65-80º F (18-27º C). Provide a system that has a resin gel
time of not less than 40 minutes to not more than 1½ hours at the time and
temperature of application.
Adjust the
gel time to compensate for the change in temperature throughout the day. The
temperature of the surfaces to be treated may range from 50º F (10º C) to 120º
F (49º C). Arrange to have a technical representative on site to provide mixing
proportions equipment suitability, and safety advice. Any conflict between
these provisions and representative's advice shall be resolved at the job site.
The technical representative shall remain at the job site until such time as he
and the Engineer agree
that the Contractor is
qualified in all aspects of the application of the sealer.
Do not
allow the promoter and initiator, if supplied separate from the resin, to
contact each other directly. Do not store containers of promoter or initiators
together in a manner that will allow leakage or spillage from one to contact
the containers or materials of the other.
Machine
application of the resin may be performed by using a two-part resin system
utilizing a promoted resin for one part and an initiated resin for the other
part. This two-part resin system may be combined at a spray bar through
positive displacement atomization of the resin. Do not use compressed air to
produce the spray.
Use
appropriate cleaning and flushing of equipment, tools, etc., with an appropriate
solvent, as approved by the Engineer, in such a manner to minimize personal and
environmental hazards. Advise workman that the resin will soften gum rubber
soles, and a face-mask should be used to protect from accidental splashes.
Clothing and leather saturated with resin will harden and become useless.
Prior to
resin application the surface to be treated shall be visibly dry and its
temperature between 50º F (10º C) and 120º F (49º C). Do not apply the resin
within 24 hours after a rain or when rain is forecast within 12 hours or when
the ambient air temperature is below 50º F (10º C). Pre-mark the deck to
control mixed material usage and to provide a rate of application of
approximately 100 square feet per gallon (2.45m2/L). The exact rate
shall be determined by the Engineer prior
to commencing full-scale deck treatment operations.
Before
using the material submit to the Director copies of the manufacturer certified
test data showing that the material complies with the requirements of this
specification. The test data shall be developed by an independent approved
testing laboratory, and shall include the brand name of the material, name of
manufacturer, number of the lot tested and date of manufacture. When the
material has been approved by the Director, further testing by the manufacturer
will not be required unless the formulation of manufacturing process has been
changed, in which case new certified test results will be required. The
manufacturer shall certify that the formulation is the same as that for which
data has been submitted. The state reserves the right to sample and test
delivered lots for compliance.
Flood the
deck surfaces resin, allowing penetration into the concrete and filling of all
cracks. Limit the initiated mix of promoted resin to 5 gallons (19L) at a time for manual
application. A significant increase in viscosity shall be cause for rejection.
Apply the treatment within 5 minutes after complete mixing. Redistribute excess
material by squeegee or brooms within 10 minutes after application.
Take all
steps necessary to prevent the resin from flowing into lanes open to traffic.
Broadcast sand over the entire treated area of the bridge deck by mechanical
means to affect a uniform coverage of 0.80 to 1.2 pounds per square yard (0.43
kg/m2 to 0.65 kg/m2). The sand shall be uniformly graded
aggregate conforming to the quality requirements of 703
and shall conform to the following limits for grading:
|
Sieve Size |
% Passing Max. |
|
No. 4 (4.75mm) |
100 |
|
No. 8 (2.36mm) |
90-100 |
|
No. 20 (850µm) |
5-15 |
|
No. 50 (300µm) |
0-5 |
It is the
intention of the specification to allow the use of commercially available blast
sands applied by a common lawn broadcast type seeder/spreader. Place sand
between 10 to 15 minutes behind the resin spreading front and before any
jelling of the resin occurs. If the surface contains large deep cracks, the
low-viscosity liquid could run completely through the concrete slab. Apply a
second coat in these areas after the first coat has started to cure.
Before the
monomer hardens, fill imperfections or spalls with standing liquid with
commercial quality concrete or sandblast sand, and finished to a uniform
surface. The sand shall have a maximum moisture content of 0.5 of the percent
of absorption when tested in accordance to a California Test 226.
Do not
permit traffic and equipment on the tested deck until it is tack free and a
minimum of 6 hours have elapsed since treatment and the sand cover adheres
sufficiently to resist brushing by hand. Protect the treatment from moisture
for not less than 4 hours after placement.
512.05 Soluble Reactive Silicate (SRS) Concrete Treatment
This item consist of the
necessary labor, materials and equipment to prepare and treat portland cement
concrete surfaces with a reactive silicate sealer meeting these specifications.
A. Equipment. Use application equipment that is recommended by the manufacturer. Use spray
equipment, tanks, hoses, brooms, rollers, coaters, squeegees, etc., that are
thoroughly clean, free of foreign matter, oil residue and water prior to
applying the treatment.
B. Cleaning and Surface Preparation. Insure that surfaces which are
to be treated meet the approved product’s requirements for surface condition.
Do not begin sealing until all concrete repairs have been completed and cured.
Furnish the Engineer with
written instructions for surface preparation requirements and have a
representative of the manufacturer present to assure the surface condition
meets their requirements.
At a minimum, thoroughly clean the surface to remove dust, dirt, oil,
wax, curing components, efflorescence, latence, coatings and other foreign
materials. Obtain the approval of the manufacturer or its representative before
the use of chemicals and other cleaning compounds to facilitate the removal of
these foreign materials. Apply the treatment within 48 hours following surface
preparation.
Fit cleaning equipment with suitable traps, filters, drip pans and other
devices to prevent oil and other foreign material from being deposited on the
surface.
C. Test Application. Treat a measured test coverage area on horizontal and vertical surfaces of the
different components of the structure to be treated for the purpose of
demonstrating the desired physical and visual effect of an application or of
obtaining a visual illustration of the absorption necessary to achieve the
specified coverage rate prior to final application. In the latter case, use at
least ½ gallon (2 liter) of treatment following the manufacturer's recommended
method of application for the total of the test surfaces. Locate horizontal
test surfaces on the deck and on the safety curb or sidewalk and locate
vertical test surfaces on an abutment parapet and pier face so that the
different textures are displayed.
D. Application. Apply the concrete treatment to concrete surfaces as designated on
the plans. Apply the SRS by thoroughly saturating the concrete surfaces at an
application rate specified by the manufacturer.
Apply the SRS when the concrete surface temperature is above 35º F (2º
C).
Use a surface thermometer on the concrete to establish the temperature of the
concrete if the air temperature at the time of application is 45º F (7º
C) or
below.
Spread the SRS from puddles to dry areas.
If unable to complete the entire application continuously, note and
clearly mark the location where the application was stopped.
E. Protection
of Adjoining Surfaces and the Public., Protect by masking off or by other means
adjoining surfaces of the structure which are not to be sealed when applying a
treatment. Make provision to protect the public when treating the fascia of a
bridge and/or portions of the underside of the deck of a bridge that spans an
area used by the public.
Protect asphalt and mastic type surfaces from spillage and heavy overspray.
Do not apply joint sealants, traffic paints and asphalt overlays to the treated
surfaces until 48 hours after the treatment has been applied. Cover adjoining
and nearby surfaces of aluminum or glass where there is a possibility of the
treatment being deposited on the surfaces.
Protect plants and vegetation from overspray by covering with drop cloths. Follow precautions as indicated on the manufacturer's MSDS.
F. Opening to Traffic. Only allow traffic on a deck after a treated area does not
track.
512.06 Treating
Concrete Bridge Decks with Gravity-Fed Resin. This work shall consist of preparing and treating the concrete bridge
deck with a gravity-fed crack welding system in accordance with these specifications
in reasonably close conformity with the plans and the manufacturer's
recommendations and as directed by the Engineer.
A.
Limitations. Do not perform this work during the period
beginning November 1st and ending March 31st.
Prior to
resin application insure that the surface to be treated is visibly dry with a
temperature between 40º F (4º C) and 100º F (38º C). Do not apply the resin
within 24 hours after a rain, during rain, when rain is forecast within 12 hours
or when the ambient air temperature is below 40º F (4º C).
B.
Surface Preparation
First remove roadway dirt and debris from the area to be treated. Sweep
abrasive blasted surfaces to which the sealer is to be applied, then manual or
power broom swept and blown with compressed air so that they are dry and free
of dust and dirt. Use high pressure compressed air to blow all loose material
from visible cracks. Use a high pressure water blast followed by an air blast
if particles are highly embedded in the cracks, to clean cracks. Fit the
cleaning equipment with suitable traps, filters, drip pans, dryers and other
devices to prevent oil and other foreign material from being deposited on the
surface. Do not allow traffic on the clean surfaces prior to application of the
sealer. Remove existing pavement marking according to section 641.10 of the
ODOT CMS. Remove all traces of asphalt or petroleum products and concrete
curing by the abrasive blasting prior to air sweeping.
C. Application
Pre-mark the deck to
control mixed material usage and to provide a rate of application of
approximately 100-150 square feet per gallon (2.45m2/L-3.68m2/L). The Engineer will
determine the exact rate but will not exceed 150 square feet per gallon (3.68m2/L). Flood the area to be sealed with resin.
Allow the resin to penetrate into the concrete and fill all cracks. Mix the
resin to a limit of 5 gallons (191) at a
time for manual application. Reject resin with a significant increase in
viscosity. Redistribute excess material by a squeegee within 10 minutes after
application. Front and back movement with the squeegee is recommended over
cracks and patch perimeters to enhance penetration. Take all steps necessary to
prevent the resin from flowing into lanes open to traffic. Broadcast sand over
the entire sealed area of the bridge deck by mechanical means to effect a
uniform coverage of 1 pound (0.45kg) per 2-3 square foot (0.1858-0.2787 square
meter).
Protect the
treatment from moisture for not less than 6 hours after placement.
D.
Traffic. Do not permit traffic on the
treated deck until the resin is tack free,
a minimum of 6 hours has elapsed since treatment, and the sand cover
adheres sufficiently to resist brushing off by hand.
512.07 Sealing
Cracks by Epoxy Injection. This specification covers the
repair of dry, moist or wet cracks or fractures that are 2 to 100 mils (50 to
2500 micrometers) in thickness in reinforced concrete members. The repair is
by means of an epoxy injection system. This system shall consist of a
paste epoxy used to seal the surface cracks and an injection epoxy used under
low pressure, 200 psi (1400kPa) max., to penetrate and fill the cracks and bond
the crack surfaces together. Material for each epoxy shall consist of a
two-component modified resin bonding system. The unmodified resin shall be
known as Component A and the hardener as Component B.
Arrange to have a manufacturer's representative at the job site to familiarize him and the Engineer with the epoxy materials, application procedures and recommended pressure practice. This representative shall direct at least one complete crack or area injection and be assured prior to his departure from the project that the personnel are adequately informed to satisfactorily perform the remaining repairs.
Furnish the Engineer a copy of the manufacturer's comprehensive preparation, mixing and application instructions which have been developed especially for use with the proposed epoxy injection system. Ensure that any significant changes to these instructions which are recommended by the representative for an unanticipated situation have been approved by the Engineer prior to the adoption of such changes.
Clean concrete surfaces
adjacent to the cracks to be sealed only to the extent necessary to achieve an
adequate bond with the paste epoxy, and only by procedures which will not cause
abrasive grits or concrete dust to penetrate the cracks. Do not permit the use
of solvents or thinners in cracks or on bonding surfaces.
Install
injection ports or tees in cracks to be injected. Space injection ports or tees
at 6 to 12 inches (150 to 300 mm) vertically and 6 to 18 inches (150 to 450 mm)
horizontally but in no case closer together than the thickness of the concrete
member if full depth penetration is desired unless otherwise specified or
directed. Set ports or tees in dust free holes made either with vacuum drills
or chipping hammers. Seal all surface cracks in the area to be repaired, after
injection ports or tees have been inserted into the holes, with paste epoxy
between ports to ensure retention of the pressure injected epoxy within the
confines of the member. The Department will allow an alternative procedure of
sealing the cracks before the injection holes have been made. Limit the
application of paste epoxy to clean and dry surfaces. Limit substrate
temperatures to not less than 45º F(7º C) during epoxy applications.
Begin the
epoxy injection at the bottom of the fractured area and progress upward using a
port or tee filling sequence that will ensure the filling of the lowermost
injection ports or tees first.
Establish
injection procedures and the depths and spacings of holes at injection ports or
tees. Use epoxy with flow
characteristics and injection pressure that ensure no further damage will be
done to the member being repaired. Ensure that the epoxy will first fill the
innermost portion of the cracked concrete and that the potential for creating
voids within the crack or epoxy will be minimized.
Remove the
injection ports or tees flush with the concrete surface after the fractured
area has been filled and the epoxy has partially cured (24 hours at ambient
temperature not less than 60º F (16º C),
otherwise not less than 48 hours). Roughen the surfaces of the repaired areas
to achieve uniform surface texture.
Remove any injection epoxy runs or spills from concrete surfaces.
Obtain two
4-inch (100 mm) diameter core samples in the first 100 linear feet (30 m) of
crack repaired and one core for each 100 linear feet (30 m) thereafter. Take
the core samples from locations determined by the Engineer and for
the full crack depth. Cores will be visibly examined by the Engineer to determine
the extent of epoxy penetration. Repair the core holes in the concrete with
material specified in 705.21.
General. Apply an even and uniform coating of asphalt materials using brushes, squeegees, or spray equipment.
If using spray equipment, provide portable power pressure type spraying equipment capable of being moved to the location of the waterproofing operation.
Protect concrete surfaces not covered with waterproofing from overspray, spilling, or otherwise marring of the surface with the asphalt materials.
Ensure that the edge of any exposed application is sharply defined true to line with a uniform exposure.
Preparation
of Surface.
Asphalt Materials. Remove concrete projections. Using wire brushes and clear water, remove dirt and the outside film of cement. Before applying asphalt materials, ensure that the concrete is clean and dry and the concrete temperature is at least 40 °F (4 °C).
Membranes. Remove protrusions from the concrete. Sweep off dirt and dust, and blow the concrete clean. Fill joints or cracks greater than 3/8 inch (10 mm) wide with portland cement mortar. In addition to the above, remove oil and grease from surfaces for Type 3 membranes using water and a detergent designed to remove oil and grease from concrete. Flush residual detergent from the surface. Do not allow traffic on the cleaned surface.
Primer Coat. Apply the primer coat at the rate of 0.10 to 0.15 gallon (0.50 to 0.70 L) of asphalt material per square yard (square meter).
For primer coats applied between June 1 and September 1, use asphalt primer for waterproofing or emulsified asphalt primer conforming to 512.02.
For primer coats applied between September 1 and June 1, use asphalt primer for waterproofing conforming to 512.02.
If practical, apply asphalt emulsion using spray equipment.
If subjected to traffic, spread sand on the primer coat for protection. Broom off excess sand before applying asphalt waterproofing.
Type A Waterproofing. This type of waterproofing consists of one primer coat and at least two coats of asphalt material conforming to 702.06 to provide a total of at least 1 gallon (5 L) of asphalt per square yard (m2) on flat areas and at least 1/2 gallon per square yard (3 L/m2) on vertical or sloping surfaces. Start applying the waterproofing at the lowest point, and progress to a higher elevation. uniformly cover the surface except apply more asphalt in corners and over construction joints. Apply the asphalt material at a temperature from 250 to 350 °F (121 to 177 °C).
Type B Waterproofing. This type of waterproofing consists of one primer coat, three coats of asphalt material conforming to 702.06, and two layers of waterproofing fabric conforming to 711.24 applied as follows:
1. On a clean, dry, and well-primed surface, apply a thorough coating of asphalt at a temperature from 250 to 350 °F (121 to 177 °C).
2 Apply the coating at a rate of at least 1/3 gallon per square yard (1.5 L/m2) of surface.
3. While the asphalt is hot enough to penetrate the fabric, lay the fabric according to the following:
a. Surfaces Wider than Normal Fabric Strip. For the first strip, lay a half-width [normally 18 inches (0.5 m) wide] strip of fabric. For the second strip use a full-width strip of fabric, and lap the entire width of the first strip. Lap each succeeding strip 2 inches (50 mm) more than half its full width. Lap the fabric strips in the direction of water flow.
b. Surfaces with Same Width as Fabric Strip. For the first strip, lay a full-width strip. For the second strip, lay another full-width strip, covering the first.
Lay each strip without wrinkles, folds, or pockets. Thoroughly coat the strip with asphalt for the full width of the lap before laying the succeeding strip. Each application shall entirely conceal the texture of the fabric.
4. Apply a final coat of asphalt to provide a thorough covering for the fabric.
5. For all three coats, use a total of at least 1 gallon (5 L) of asphalt waterproofing material per square yard (m2).
Lap ends of fabric strips at least 12 inches (0.3 m), and stagger the end joints.
Type D Waterproofing. This type of waterproofing consists of one primer coat, one layer of waterproofing fabric conforming to 711.24 over joints, three coats of asphalt material conforming to 702.06, and two shingled plies of asphalt saturated waterproofing fabric conforming to 711.24.
Prime the surface to be waterproofed and allow the primer to dry. Fill joints and irregularities in the surface with asphalt cement. Lay a layer of fabric extending at least 9 inches (230 mm) on both sides of all joints. Leave the underside of this layer unbonded to the concrete surface.
Apply the asphalt at a temperature from 250 to 350 °F (121 to 177 °C) and conceal the texture of each layer of fabric with the asphalt. Use at least 1/3 gallon (1.5 L) of asphalt per square yard (m2) of surface for each application. Begin applying the asphalt and fabric at the low side or sides of the surface, and proceed toward the apex or high side so that water runs over and not against or along the laps of the fabric. Lay the fabric without wrinkles, folds, or pockets. Lap ends of fabric strips at least 12 inches (0.3 m), and stagger the end joints.
Start applying waterproofing by mopping asphalt on a surface slightly wider than half the width of the fabric strip. Immediately lay a half-width strip of the fabric onto the asphalt. Mop asphalt on this strip and an adjacent surface slightly wider than half the width of the fabric, and lay a full width of fabric that entirely covers the first strip. Mop asphalt on the second half of this second strip and an adjacent concrete surface and lay a third strip of fabric that laps the first strip at least 2 inches (50 mm). Continue this process of applying asphalt and laying fabric until the entire surface is covered and each strip of fabric laps the next to last strip already placed by at least 2 inches (50 mm). Finish laying fabric with a partial-width strip and mop the entire surface with asphalt.
Type 2 Membrane Waterproofing. This type of waterproofing consists of a rubberized asphalt and peel-and-stick waterproofing membrane 711.25. If the ambient temperature is below 50 °F (10 °C), use a manufacturer recommended primer coat for vertical surface application. After installing the primer coat, if required, remove the membrane’s release liner and place the adhesive side on the prepared concrete surface. Lay the membrane smooth and free of wrinkles. Lap joints in membranes by at least 1 inch (25 mm). Store membrane materials indoors at temperatures not to exceed 120 °F (49 °C).
For precast concrete three- and four-sided structures, install Type 2 membrane on the exterior vertical and exterior top horizontal surfaces.
Type 3 Membrane Waterproofing. This type of waterproofing consists of a primer coat conforming to 705.04 and a waterproofing membrane consisting of a high density asphalt mastic between two layers of polymeric fabric conforming to 711.29.
Keep membrane and primer materials dry before installation.
Heat the membrane primer in an oil primer heated, double-jacket kettle. Use a kettle that is clean and free of other materials with any obvious buildup scraped out. The Contractor may use a single-jacket kettle if the primer is capable of being heated in direct fire to the application temperature. Heat primers within the manufacturer’s recommended temperatures.
On bridges with curbs, apply the primer and membrane 3 inches (75 mm) up the curb face. On prestressed box beam bridges with no approach slab, apply the primer and membrane 6 inches (150 mm) over the ends of the beams. On prestressed and slab bridges with approach slabs, apply the primer 2 feet (600 mm) out onto the approach slab.
If the plans require a Type 3 membrane on the top exterior surface of precast concrete three- or four-sided structures, apply the primer and membrane to overlay the vertical exterior sides of the structure by 12 inches (300 mm).
Apply primer no further than 5 feet (1.5 m) in front of the membrane using a squeegee to fill all voids and imperfections. Apply membrane from the low to the high side of the surface. Apply an extra bead of primer at the edge of the membrane. Lap joints in membranes by at least 3 inches (75 mm). After installing the membrane over the entire surface, seal joints in the membrane by applying primer and smoothing with a V-squeegee.
512.09 Method of Measurement. The Department will measure Waterproofing, of the type specified, by the number of square yards (square meters) or on a lump sum basis.
The Department will measure the sealing of
concrete surfaces, sealing of concrete bridge decks with HMWM resin and treating concrete bridge decks with SRS as
the actual area in square yards (square meters ) of surfaces treated.
The Department will measure the actual length in linear feet (meters) of crack repaired by epoxy injection.
512.10 Basis of Payment. The Department will pay for accepted quantities at the contract prices as follows:
The Department will consider the cost for the obtaining and repairing the two cores used by the Engineer to determine the extent of the epoxy penetration as incidental to the work of repairing the concrete by epoxy injection.
Item unit Description
512 Square yards Sealing of concrete surfaces
(square meter)
512 Square yards Sealing of concrete surfaces
(square meter) (non-epoxy)
512 Square yards Sealing of concrete surfaces
(square meter) (epoxy urethane)
512 Square yards Sealing of concrete bridge
(square meter) decks with HMWM resin
512 Square yards Treating concrete bridge
(square meter) decks with SRS
512 Square yards Treating concrete bridge
(square meter) decks with Gravity-Fed Resin
512 Linear feet Concrete repair by epoxy
(meters) injection
512 Square
Yard Type A
Waterproofing
(Square Meter)
Lump Sum
512 Square
Yard Type B
Waterproofing
(Square Meter),
or Lump Sum
512 Square
Yard Type D
Waterproofing
(Square Meter),
or Lump Sum
512 Square
Yard Type 2
Waterproofing
(Square Meter),
or Lump Sum
512 Square
Yard Type 3
Waterproofing
(Square Meter),
or Lump Sum