This master should be used by designers working on Port of Portland construction projects and by designers working for PDX
tenants (“Tenants”). Usage notes highlight a few specific editing choices, however the entire section should be evaluated and
edited to fit specific project needs.
SECTION 321273 – ASPHALT PAVEMENT JOINT SEALANT
PART 1 - GENERAL
1.1
DESCRIPTION
A.
1.2
This section describes a resilient and adhesive joint sealing filler capable of effectively sealing
joints in rigid pavements and rigid/flexible interface joints.
RELATED WORK ELSEWHERE
A.
Section 320117, Pavement Repair
B.
Section 321200, Asphalt Concrete Paving
C.
Section 321300, Portland Cement Concrete Paving
1.3
REFERENCES
A.
ASTM: American Society for Testing and Materials
1.
ASTM C679: Standard Test Method for Tack-Free Time of Elastomeric Sealants
2.
ASTM C920: Standard Specification for Elastomeric Joint Sealants
3.
ASTM D5: Standard Test Method for Penetration of Bituminous Materials
4.
ASTM D36: Standard Test Method for Softening Point of Bitumen (Ring-and-Ball
Apparatus)
5.
ASTM D113: Standard Test Method for Ductility of Bituminous Materials
6.
ASTM D3236: Standard Test Method for Apparent Viscosity of Hot Melt Adhesives and
Coating Materials
7.
ASTM D3405: Standard Specification for Joint Sealants, Hot-Applied, for Concrete and
Asphalt Pavements
8.
ASTM D3406: Standard Specification for Joint Sealant, Hot-Applied, Elastomeric-Type,
for Portland Cement Concrete Pavements
9.
ASTM D3569: Standard Specification for Joint Sealant, Hot-Applied, Elastomeric, JetFuel-Resistant-Type for Portland Cement Concrete Pavements
10. ASTM D5249: Standard Specification for Backer Material for Use with Cold- and HotApplied Joint Sealants in Portland-Cement Concrete and Asphalt Joints
11. ASTM D5329: Standard Test Methods for Sealants and Fillers, Hot-Applied, for Joints
and Cracks in Asphaltic and Portland Cement Concrete Pavements
12. ASTM D5893: Standard Specification for Cold Applied, Single Component, Chemically
Curing Silicone Joint Sealant for Portland Cement Concrete Pavements
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1.4
SUBMITTALS
A.
1.5
Submit the following:
1.
Product data and test reports for each joint sealant product to be used. Include a written
certification from the manufacturer that the materials selected meet the requirements of
these specifications and are recommended for the installation involved.
2.
Samples of the material to be used in order to verify type and color.
3.
Manufacturer’s instructions when installation procedures, or any part thereof, are
required to be in accordance with the manufacturer’s instructions. Installation will not be
allowed until the instructions are received. Failure to furnish these instructions can be
cause for rejection of the material.
4.
Qualification data for installer and product testing agency.
DELIVERY, STORAGE, AND HANDLING
A.
Deliver materials to the work site in original unopened containers or bundles with labels
indicating manufacturer, product name and designation, batch or lot number, color, expiration
date, pot life, the safe heating temperature, curing time, and mixing instructions for multicomponent materials.
B.
Store and handle materials in accordance with the manufacturer’s written instructions to prevent
deterioration or damage due to moisture, high or low temperatures, contaminants, or other
causes.
PART 2 - PRODUCTS
2.1
GENERAL
A.
Provide joint sealants, backing materials, and other related materials that are compatible with
one another and with joint substrates under conditions of service and application, in accordance
with the manufacturer’s instructions.
B.
Obtain each type of joint sealant through one source and from a single manufacturer.
2.2
COLD-APPLIED JOINT SEALANTS FOR RIGID PAVEMENTS
A.
Multi-Component Jet-Fuel-Resistant Sealant: Sealant shall be a pourable, chemically curing
elastomeric material complying with the following requirements for formulation and with
ASTM C920 for type, grade, class, and uses indicated:
1.
Urethane Formulation: Type M; Grade P; Class 12 1/2; uses T, M, and, as applicable to
joint substrates indicated, O. Pecora Corporation Urexpan NR-300, or equal.
2.
Bitumen-Modified Urethane Formation: Type M; Grade P; Class 25; uses T, M, and, as
applicable to joint substrates indicated, O. Tremco Sealant/Waterproofing Division
Vulkem 202, or equal.
B.
Single-Component Jet-Fuel-Resistant Urethane Sealant: Sealant shall be single-component,
pourable, coal-tar-modified, urethane formulation complying with ASTM C920 for Type S;
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Grade P; Class 25; Uses T, M, and, as applicable to joint substrates indicated, O. Sonneborn
Division of ChemRex, Inc. Sonomeric 1, or equal.
C.
2.3
Type NS Silicone Sealant: Sealant shall be single-component, low-modulus, neutral-curing,
nonsag silicone sealant complying with ASTM D5893 for Type NS. Crafco Inc. RoadSaver
Silicone, Dow Corning Corporation 888, or equal.
COLD-APPLIED JOINT SEALANTS FOR RIGID/FLEXIBLE PAVEMENT INTERFACE
A.
2.4
Single-Component, Chemically Curing Silicone Joint Sealant: Sealant shall meet or exceed
ASTM D5893, be self-leveling, and have the properties listed below. Crafco Inc. Roadsaver
Silicone SL, Dow Corning Corporation 890-SL, or equal.
1.
Color
Dark Gray
2.
Flow, Sag or Slump
Self-leveling
3.
Ultimate Elongation
600% min.
4.
Tack Free Time (ASTM C679)
5 hr. max.
5.
Full Adhesion
21 days max.
6.
Tensile Adhesion (ASTM D5329)
400% min.
HOT-APPLIED JOINT SEALANTS FOR RIGID PAVEMENTS
A.
Jet-Fuel Resistant Elastomeric Sealant: Sealant shall be a single-component formulation
complying with ASTM D3569. Crafco Inc. Superseal 444/777, W.R. Meadows, Inc. Poly-Jet
3569, or equal.
B.
Elastomeric Sealant: Sealant shall be a single-component formulation complying with ASTM
D3406. Crafco Inc. Superseal 444/777, W.R. Meadows, Inc. Poly-Jet 3569, or equal.
2.5
HOT-APPLIED JOINT SEALANTS FOR RIGID AND FLEXIBLE PAVEMENTS
A.
2.6
Single-Component, Hot-Melt, Rubberized Asphalt Sealant: Sealant shall meet or exceed
ASTM D3405 and, when heated, applied, and cured in accordance with the manufacturer’s
directions, have the properties listed below. Crafco Inc. 34271, Elastomeric Loop Sealant PMC
1158, CMC Loopseal P-605, Koch Materials Company 9005 or 9030, W.R. Meadows, Inc,
Sealtight Hi-Spec, or equal.
1.
Penetration, 125°F (ASTM D5)
30 max.
2.
Penetration, 77°F (ASTM D5)
15 max.
3.
Softening Point (ASTM D36)
220°F min.
4.
Ductility, 77°F (ASTM D113)
25 cm max.
5.
Brookfield Viscosity at 400°F (ASTM D3236)
75 poise max.
BACKER MATERIALS
A.
General: Provide joint-sealant backer materials that are non-staining and compatible with joint
substrates, sealants, primers, and other joint fillers. Ensure they are approved for applications
indicated by the joint sealant manufacturer.
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Retain B for cold- and hot-applied sealants in joints, such as contraction joints, where backer materials serve only to limit sealant
depth and prevent bottom-side adhesion.
B.
Round Backer Rods for Cold- and Hot-Applied Sealants: Conform to the requirements of
ASTM D5249, Type 1. Backer rods shall be of proper diameter and density to control sealant
depth and prevent bottom-side adhesion of sealant.
Retain C for cold- and hot-applied sealants in joints, such as expansion joints, where it is desirable for backing material to fill
remainder of joint opening under sealant and minimize intrusion of water and incompressible foreign objects.
C.
Backer Strips for Cold- and Hot-Applied Sealants: Conform to the requirements of ASTM
D5249, Type 2. Backer rods shall be of proper thickness and width to control sealant depth,
prevent bottom-side adhesion of sealant, and fill remainder of joint opening under sealant.
D.
Round Backer Rods for Cold-Applied Sealants: Conform to the requirements of ASTM D5249,
Type 3. Backer roads shall be of proper diameter and density required to control sealant depth
and prevent bottom-side adhesion of sealant.
Retain 2.7 unless priming of substrates is not required with sealants specified. Purpose of primers is to improve adhesion of
sealant to substrate.
2.7
PRIMERS
A.
2.8
Where adhesion of sealant to joint substrate is required, use primer recommended by the joint
sealant manufacturer.
EQUIPMENT
A.
For hot-applied sealants, heating kettle shall be an indirect heating type and constructed as a
double boiler. The kettle shall have a positive temperature control and mechanical agitation.
Provide a direct connecting pressure type extruding device with nozzles shaped for insertion
into the joint.
B.
Install silicone joint sealants with equipment recommended by the product manufacturer for the
specific product.
PART 3 - EXECUTION
3.1
ENVIRONMENTAL CONDITIONS
A.
Pavement temperature shall be at least 40°F at the time of application of joint sealing material
unless otherwise recommended by product manufacturer.
B.
Do not proceed with installation of joint sealing material when joint substrates are wet or
covered with frost.
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3.2
JOINT PREPARATION
A.
Immediately before sealing, thoroughly clean joint of all laitance, particulate, or other foreign
material.
B.
Blow out joint with compressed air once cleaning is complete. Joint shall be completely dry
when sealant is applied.
C.
Prime joint substrates where indicated or where recommended by the manufacturer. Apply
primer to comply with manufacturer’s instructions. Confine primers to areas of joint sealant
bond; do not allow spillage or migration onto adjoining surfaces.
3.3
INSTALLATION OF SEALANTS
A.
Joints shall be inspected for proper preparation and shall be approved by the Port before sealing
will be allowed.
B.
Install backer material of the type indicated to support sealant during application and at position
required to produce the necessary cross-sectional shape and depth of installed sealant relative to
joint width.
C.
Pre-heat hot-applied, solid form, rubberized asphalt sealants to an ideal pouring temperature of
400°F to 420°F, or in accordance with the manufacturer’s instructions. The entire batch shall be
rejected and replaced with new material if the pot temperature exceeds 430°F.
D.
Prior to installation of silicone sealants used for rigid/flexible interfaces, completely remove any
asphalt from the concrete face by making the saw cut sufficiently tight along the edge of the
concrete. The pavement shall be sufficiently cooled in accordance with the manufacturer’s
instructions.
E.
Apply joint sealant uniformly solid from bottom to top. Fill joint, in layers, if required, without
formation of entrapped air or voids.
F.
When required by product manufacturer, immediately tool sealant after application and before
skinning or curing begins, to form a smooth, uniform surface and to ensure complete contact
and adhesion of sealant with sides of joint. Use tooling agents that are approved by the joint
sealant manufacturer and that do not discolor sealants or adjacent surfaces.
3.4
CLEANING
A.
3.5
Immediately clean off any sealant smears or sealant spilled on pavement adjacent to joints as
the work progresses. Use methods and cleaning materials approved by the manufacturer of
joint sealant.
PROTECTION
A.
Protect joint sealants during and after curing period from contact with contaminating substances
and from damage resulting from construction operations or other causes. If, despite such
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protection, damage or deterioration occurs, cut out and remove damaged or deteriorated joint
sealants immediately and replace with new sealant. Repaired areas shall be indistinguishable
from the original work.
END OF SECTION 321273
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