1073.1 Scope. This specification covers material for performed compression seals and strip seals with lubricant-
adhesive for sealing joints, and expanded or extruded polystyrene material for use as bedding material under prestressed panels and in the corrugation areas of stay-in-place forms used on bridge decks.
1073.2 Acceptance. All material under this specification shall be obtained from a source identified on the PAL
designated for this specification. All material will be inspected and accepted in accordance with Sec 106.
1073.3 Preformed Compression Seal. Preformed compression seals shall be in accordance with ASTM D 3542
and with the following additional requirements.
1073.3.1 The movement range of the seal as defined in ASTM D 3542 shall be as shown in the contract
documents, and the height of seal shall be no less than the nominal width. The seal shall be delivered in containers marked with the manufacturer’s name, size of the seal, lot number and date of manufacture.
1073.3.2 The lubricant adhesive applied for installation shall be in accordance with the seal manufacturer and in
accordance with Sec 717. The lubricant adhesive shall be delivered in containers marked with the manufacturer's name, lot number, date of manufacture and instructions for storage and use.
1073.4 Strip Seal. Strip seals shall be in accordance with ASTM D 5973 and the following additional
requirements.
1073.4.1 The gland lugs of the seal that fasten into the steel extrusion shall be of a type that exerts pressure to
the contact surfaces. Glands with snap or arrowhead-type lugs will not be permitted. The seal shall be delivered in containers marked with the manufacturer’s name, size of the seal, lot number and date of manufacture.
1073.4.2 The lubricant adhesive applied for bonding the gland to the steel extrusion shall be as recommended by
the seal manufacturer and in accordance with Sec 717. The lubricant-adhesive shall be delivered in containers marked with the manufacturer's name, lot number, date of manufacture and instructions for storage and use.
1073.5 Expanded or Extruded Polystyrene Material.
1073.5.1 Bedding Material for Prestressed Panels. The expanded or extruded polystyrene material shall be in
accordance with the following: Property Test Requirement Compression StrengthASTM D 162160 psi, min. Water Absorption ASTM D 28422% by volume, max. Oxygen Index ASTM D 286324 minimum
1073.5.2 Material for Corrugation Areas of Stay-In-Place Forms. Expanded polystyrene material shall be in
accordance with the following: Property Test Requirement Compression StrengthASTM D 162110 psi, min. Water Absorption ASTM D 28422% by volume, max.
1073.5.3 Adhesive for Expanded or Extruded Polystyrene Materials. Adhesive for use with expanded or
extruded polystyrene material shall be in accordance with the polystyrene manufacturer’s recommendations.
1073.6 Open Cell Foam Joint System. All components of the system shall be supplied by one manufacturer.
The joint system shall be comprised of the following components.
a.Cellular polyurethane foam impregnated with 100% hydrophobic polymer, water based emulsion and factory coated, on the roadway surface, with highway-grade, fuel resistant silicone.
b.Field-applied epoxy adhesive primer.
c.Field-applied silicone sealant bands that seal the gap between the edge of the bridge and the silicone topping on the joint. This silicone will also be used for locking field splices in the joint together.
1073.6.1 General Movement Requirements. The seal shall have a working range of 50% in tension and 50%
in compression. Changes in plane and direction shall be executed using factory fabricated watertight transition assemblies conforming to the plans and specifications.
1073.6.2 Seal Properties. The seal shall be able to meet the following properties:
Property Requirement Temperature Service Range, ASTM C 711-40° F to 185° F Bleeding None at 180° F @ 50% compression for 3 hrs. UV Resistance, ASTM G 155 No Changes at 2000 hrs. Polymer impregnation agent Free of any waxes or asphalts
1073.6.3 Adhesive Properties. The epoxy adhesive shall be a 100% solids, two component moisture sensitive
modified epoxy adhesive which meets ASTM C 881.
1073.6.4 Sealant Properties. The silicone sealant shall be a one part, cold applied chemically curing silicone
joint sealant which meets ASTM D 5893.
1073.7 Preformed Silicone or EPDM Joints. All components, materials and equipment required for the
installation shall be obtained through an approved supplier of the system. All components of each respective joint system shall come from the same manufacturer and cannot be substitutes for others.
1073.7.1 Joint Properties. The joint material shall meet or exceed the following physical requirements:
Property Specification Requirement Durometer (Shore A) ASTM D 224055 ±5 min. Tensile Strength ASTM D 412 550 psi min. Elongation ASTM D 412 350% min. Tear Strength (Die B) ASTM D 624 100 ppi min. Compression Set At 350° F 22 hrs. ASTM D 395 30% max. Operating Temperature Range -60° F to 350° F Specific Gravity 1.51 ±0.10
1073.7.1 1 The joint seal shall be pre-qualified by undergoing and passing a cyclic loading test. Any rips, tears
or bond failure will be cause for rejection. Manufacturer shall provide documentation to verify testing meeting these minimum requirements. Cyclic Loading Test Property Requirement Test Sample Length 2 feet min. Joint Skew 45° Number of Cycles 200 min. Joint Opening 2 inches Movement min. to max. opening Temperature -20° F
1073.7.2 Epoxy Primer. Epoxy primer shall be used to ensure the appropriate bond of the joint sealing system
and to protect the surfaces of the joint after installation of the seal. The epoxy primer shall meet the following physical requirements: Epoxy Primer Property Specification Requirement Viscosity (centipoises)ASTM D 2196 44 Solids ASTM D 4209 41 Specific Gravity ASTM D 1217 0.92 Flashpoint ASTM D 56 48 VOC ASTM D 3960 520
1073.7.3 Locking Adhesive. The adhesive material shall cure quickly and shall be as recommended by the
manufacturer. The material shall adhere to concrete, elastomeric concrete, polymer concrete and steel and shall meet the following physical requirements: Locking Adhesive Property Specification Requirement Sag/Flow ASTM C 639 3/16 inch max. Hardness ASTM C 661 20-30 Tack Free Time ASTM C 679 30 minute max. Cure Through to ¼ inch Thickness At 75° F/50% Relative Humidity 24 hours max. Skin Over Time (Tooling Time) At 75° F/50% Relative Humidity 5 minute max. Resistance to U.V. ASTM C 793 No cracking, Ozone Chalking or Degradation Flashpoint ASTM D 412 200 psi min. VOC ASTM D 412 450% min.
1073.8 Documentation. Prior to approval and use of this material, the manufacturer shall submit to
Construction and Materials a certified test report showing specific test results in accordance with all requirements of these specifications. The certified test report shall contain the manufacturer's name, brand name of material, lot tested and date of manufacture. In addition, the manufacturer shall submit a sample of the seal or polystyrene material and a one-pint sample of the adhesive for laboratory testing, accompanied by a technical data sheet and an MSDS. With approval by the engineer of the certified test report and satisfactory results of tests performed on the sample submitted, the brand name and manufacturer will be placed on the appropriate pre-acceptance list. Pre-acceptance lists are available through Construction and Materials or MoDOT’s web site. New certified test results and samples shall be submitted any time the manufacturing process or the material formulation is changed, and may be required when random sampling and testing of material offered for use indicates nonconformity with any of the requirements herein specified.
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Source: Missouri Standard Specifications for Highway Construction, 2026 (Oct) Edition. Pages 739–741 of 874. View official source ↗