Delaware Standard Specifications for Road & Bridge Construction — Section 1042

JOINT/CRACK SEALANT MATERIAL SECTION 1042

694

1042.1Asphalt and PCC Pavements:

A.Crack Sealing. ASTM D6690 Type II .

B.Joint Sealing. ASTM D6690 Type II.

1042.2PCC Curb and Integral Curb, Medians, Sidewalks and Pedestrian Connections:

A.Preformed Expansion Joint Material. AASHTO M153, Type I , II, or IV.

B.Joint Sealing. ASTM D6690 Type II.

1042.3PCC Structures, General:

A.Preformed Elastomeric Compression Joint Seals. ASTM D2628.

B.Rubber Joint Sealant. Use the color gray to match the concrete.

1.Elastomeric Joint Sealant. ASTM C920, Type M.

2.Silicone Joint Sealant. ASTM D5893.

C.Hot Poured Joint Sealer. ASTM D6690 Type II.

D.Preformed Expansion Joint Material. AASHTO M153, Type I , II or IV.

1042.4Bridge Deck Joints:

A.Prefabricated Expansion Joint System. ASTM D5973.

Provide galvanized steel conforming to ASTM D5973 and Section 1038

B.Asphaltic Plug Joint. ASTM D6297.

C.Silicone Joint Seal. ASTM D5893.

D.Compression Seal. ASTM D3542.

E.Silicone Coated Foam Joint Seal.

F.Provide a sealant system comprised of three components:

1.Cellular polyurethane foam impregnated with hydrophobic 100 percent acrylic, water -based

emulsion, factory coated with highway -grade fuel resistant silicone.

2.Field -applied epoxy adhesive primer.

3.Field -injected silicone sealant bands.

1042.5Precast Flexible Joint Sealant:

A.Bitumen sealant or butyl rubber sealant in accordance with ASTM C990.

B.Closed -cell Neoprene Sponge in accordance with ASTM 1056, Type 2, Class D.

JOINT BACKUP MATERIAL SECTION 1043 695 SECTION 1043 — JOINT BACKUP MATERIAL

1043.1Material Requirements.

A.Use joint sealing backup material of a stitched cotton piping cord, polyethylene backer rod, or

approved equal material compatible with the sealant and capable of withstanding the required sealant application temperature without melting.

1.Stitched cotton piping cord ASTM D5249

2.Backer rod ASTM D5249

B.Before installation, provide back -up material at least 25 percent wider than the nominal width of

the joints. Size the diameter of the backup material/bond breaker so that when placed in the joint will support the sealant at its design depth, allow the sea lant to achieve the design shape, prevent the sealant from leaking around and underneath it, and allow the sealant to deform freely when the joint expands and contracts.

ALUMINUM FOR STRUCTURES SECTION 1044 696 SECTION 1044 — ALUMINUM FOR STRUCTURES

1044.1Aluminum materials.

A.General. Provide aluminum in accordance with the contract. Ensure that the supplier provides a

lot number on the shipping package and a certification. Fabricate structural aluminum in accordance with the AASHTO LRFD Bridge Construction Specifications and the AWS D1.2 Structural Welding Code —Aluminum.

B.Aluminum Plates or Sheets. Meet ASTM B209.

C.Aluminum Extrusions. Meet ASTM B221 or ASTM B308.

1044.2Fasteners.

A.Aluminum Rivets. Meet ASTM B316.

B.Dimensions . Ensure bolt and nut dimensions meet the heavy hexagon structural bolts and heavy

semi -finished hexagon nuts requirements in ANSI B18.2.1 and B18.2.2, respectively.

C.Galvanizing. Ensure high -strength steel fasteners are either hot dip galvanized according to

AASHTO M232, Class C, or mechanically galvanized according to ASTM B695, Class 50. Use the same process to galvanize washers, nuts, and bolts of any assembly.

D.Aluminum, Stainless Steel, and Steel Lock -Pin and Collar Fasteners. Meet military specification

MIL-P-23469 .

1044.3Welding Requirements.

A.Meet AASHTO /AWS D1.2 Structural Welding Code —Aluminum.

1044.4Aluminum Forgings.

A.Meet ASTM B247.

1044.5Castings.

A.Aluminum Castings. Meet ASTM B26.

B.Aluminum -Alloy Permanent Mold Castings. Meet ASTM B108.

CONCRETE COATINGS AND MEMBRANES SECTION 104 5 697 SECTION 1045 — CONCRETE COATINGS AND MEMBRANES

1045.1Epoxy Coating.

A.Provide a high solids epoxy coating that complies with all VOC regulations.

B.Additional requirements are as follows:

Table 1045.1 -1. Epoxy Coating Requirements Requirement Measurement Minimum Solids Content 72% by Weight Tensile Strength (ASTM D638) >1400 PSI Shelf Life Minimum 12 months Working Life Minimum 1 hour Sag Resistance 20 mils Moisture Permeability (ASTM E 96) 0.16 perms

C.Use the color insignia white (federal color 37925 of AMS -STD-595A) unless specified otherwise on

the contract.

1045.2Silicone -Based Acrylic Coating.

A.Provide a sealer that consists of methyl methacrylate -ethyl acrylate copolymer resins and toning

pigments suspended in solution at all times by a chemical suspension agent and solvent. Use laminar silicates, titanium dioxides, and inorganic oxide for to ning pigments. Do not use vegetable or marine oils, paraffin materials, stearates, or organic pigments in the formulation.

B.Provide a sealer that is an opaque, non -film forming, and penetrating silicone acrylic compound.

Provide a sealer that passes NCHRP 244 Series II: salt spray resistance requirements and compl ies with local VOC requirements.

C.Use the color insignia white (federal color 37925 of AMS -STD-595A) unless specified otherwise on

the contract.

1045.3Silane -Based Concrete Sealer.

A.Provide a silane based concrete sealer meeting the following requirements:

1.Applied through a one component system.

2.Contains a minimum of 40 percent silane by weight.

3.An alcohol -solvent suspension.

4.Does not alter the permanent color or texture of applied on PCC.

5.Meets the physical test requirements of Table 1045.3 -1, when tested in accordance with the

applicable test method provided.

Table 1045.3 -1. Silane -Based Concrete Sealer Requirements CONCRETE COATINGS AND MEMBRANES SECTION 104 5 698 Property Test Method Requirement Moisture Vapor Transmission ASTM D1653 Minimum 98% in relation to uncoated specimen Absorbed Chloride NCHRP 244 Series IV Southern Exposure Minimum 95% reduction Water Absorption NCHRP 244 Series II Minimum 80% reduction Depth of Penetration OHD L -40 0.15” minimum Total Solids Content ASTM D5095 40% minimum

B.Tint material with a dye that enables visibility of the sealer for at least 4 -hours after application.

The dye must not remain visible more than 7 calendars days after application of the material.

1045.4High Molecular Weight Methacrylate Sealer.

A.Provide a sealer that consists of a wax -free low odor, high molecular weight methacrylate prime

coat. Use a prime coat resin that has a maximum volatile content of 30 percent when tested in accordance with ASTM D2369 before adding initiator. The resin m ust also conform to the following: Table 1045.4 -1. High Molecular Weight Methacrylate (HMWM) Resin Properties Property Requirement Test Method Viscosity* (Brookfield RVT with UL adapter, 50 RPM at 77ºF) 25 cps, maximum ASTM D2196 Specific Gravity* (at 77ºF) 0.90, minimum ASTM D1475 Flash Point* (oF) 180 minimum ASTM D1310 Vapor Pressure* (at 77ºF) 0.0193 PSI maximum ASTM D323 Tack Free Time (minutes at 77ºF) 400 min. maximum ASTM C679 PCC Saturated Surface -Dry Bond Strength (at 24 hrs. at 70±1ºF) 700 PSI minimum California Test CT551, Part 5 *Tested before adding initiator .

B.Use a prime coat promoter/initiator that consists of a metal drier and peroxide. If supplied

separately from the resin, do not mix the metal drier directly with the peroxide as a violent exothermic reaction will result. Store the containers in a manner tha t will not allow leakage or spillage from 1 material to contact the containers or material of the other.

1045.5Membranes.

Source: Delaware Standard Specifications for Road and Bridge Construction, 2025 Edition. Pages 704–708 of 779.

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698 Property Test Method Requirement