Tennessee 2021 Standard Specifications for Road & Bridge Construction — Section 905

905.01 936 SECTION 905 – JOINT MATERIALS

905.01 Preformed Joint Fillers (Non -Extruding and Resilient Types) ..... 936

905.02 Joint Mortar ................................ ................................ .................. 936

905.03 Rubber Gaskets ................................ ................................ ............ 937

905.04 He mp or Oakum Gaskets ................................ ............................. 937

905.05 Joint Sealants ................................ ................................ ................ 937

905.01 Preformed Joint Fillers (Non-Extruding and Resilient Types)

Provide preformed joint fillers as shown on the Plans. When designated, punch holes in preformed joint filler to admit the dowels. Furnish the filler for each joint in a single piece for the full depth and width required for the joint unless otherwise directed by the Engineer. If the Engineer approves the use of more than one piece for a joint, fasten the abutting ends securely, and hold to shape by stapling or using other positive means of fastening satisfactory to the Engineer.

A.Bituminous Type Provide bituminous type preformed joint fillers conforming to AASHTO M 213.

B.Non-Bituminous Type s Provide non -bituminous types of preformed joint filler conforming to AASHTO M 153, Type I, II, or III, as specified.

C.Polypropylene Foam Type Provide semi -rigid, closed -cell, polypropylene foam, preformed expansion joint filler conforming to ASTM D8139.

905.02 Joint Mortar

Provide pipe joint mortar consisting of one part Portland cement and two parts sand, adding water as necessary to obtain the required consistency. Use Portland cement conforming to the requirements of 901.01, Type I, and sand 905.03 937 conforming to the requirements of 903.02. Obtain the Engineer’s approval of the water quality. Use mortar within 30 minutes after its preparation.

905.03 Rubber Gaskets

Provide gaskets conforming to ASTM C443.

905.04 Hemp or Oakum Gaskets

Provide gaskets of hemp or oakum packing for joint filler that are closely twisted, and of the size and type required for the pipe under construction. Gaskets shall be in one piece of sufficient length to pass around the pipe and lap.

905.05 Joint Sealants

A.Sealing Longitudinal Joints between Portland Cement and Asphaltic Concrete To seal the longitudinal joint between Portland cement and asphaltic concrete, use hot -poured elastic type sealants that comply with the following requirements:

1.Use hot poured elastic type sealants conforming to ASTM D6690, with the following exceptions:

a.The joint sealer shall be a mixture of virgin synthetic rubber, recla imed rubber, or a combination of these materials with asphalt and plasticizers and tackifiers.

b.Do not use ground cured rubber scrap.

c.The sealer shall be free of foreign material and, when melted, free of lumps. Furnish the Engineer a certified statement from the manufacturer indicating compliance with the above composition.

2.The flow at 140 F shall not exceed 0.4 inch in 5 hours. Ductility at 77 F shall be not less than 16 inches, when tested in accordance with AASHTO T 51. 905.05 938 3. Furnish the Engineer a certified copy of the test results, showing the batch number and indicating that the material supplied conforms to the requirements of the specifications.

B.Sealing Longitudinal and Transverse Joints and Random Cracks in PCC Pavement To seal longitudinal and transverse joints and random cracks in Portland cement concrete pavement, use one of the following materials, as shown on the Plans:

1.Hot poured elastic type sealant meeting the requirements of

905.05 A.

2.Silicone sealant having a low modulus silicone that is specially manufactured to seal Portland cement concrete pavements joints. Furnish silicone sealant in a one part silicone formulation that is non -acid curing and meets the requirements specified in Table 905.05 -1. 905.05 939 Table 905.05 -1: Requirements for Silicone Sealants Property Test Method Value Flow MIL S 8802 5 inches, maximum Extrusion rate MIL S 8802 90-250 grams per minute Tack free time (1) SAE-AMS-S-8802 35-75 minutes Specific gravity ASTM D792, Method A 1.010-1.515 Durometer hardness Shore A (1) ASTM D2240 10-25 Joint movement and tensile stress at 150% elongation (1) ASTM D 412, Die C ± 50% joint movement; 75 psi maximum tensile stress Peel (Adhesion): Unprimed aluminum panel with aluminum screen (1) MIL S 8802 20 pounds, minimum,with at least 75% cohesive failure Bond to concrete mortar concrete briquets air cured 7 days at 77 ± 3 °F (2) AASHTO T 132 50 psi, minimum

1.7-day cure at 77 ± 3 °F and 45 -55% relative humidity

2.Determine the bond to concrete mortar by molding briquets in accordance with AASHTO T 132, sawed in half and bonded with a thin section of sealant. Test the briquets in accordance with AASHTO T 132. Dry briquets to constant weight in an oven at 212  ±40 F. If shown on the Plans, provide a backer rod (bond breaker) that is compatible with the sealant and will ensure no bond or reaction will occur between the rod and the sealant. Use joint fillers and sealants selected from the Department’s QPL. Certify that the product meets the applicable specifications and that the material is identical to that previously tested and placed on the QPL. The Department reserves the right to perform any testing deemed necessary to ensure compliance with these Specifications. 906.01 940 SECTION 906 – DAMPPROOFING AND WATERPROOFING MATERIALS

906.01 General ................................ ................................ ......................... 940

906.02 Class I Dampproofing and Waterproofing ................................ ... 940

906.03 Class II Dampproofing and Waterproofing ................................ .. 940

906.04 Bridge Deck Sealants ................................ ................................ ... 941

906.01 General

This Section covers materials used in dampproofing and waterproofing concrete surfaces. Provide the Class of waterproofing shown on the Plans or as otherwise specified or directed.

906.02 Class I Dampproofing and Waterproofing

Provide materials conformi ng to the following:

1.Asphalt seal for use below ground level: ASTM D449, Type I

2.Asphalt seal for use above ground level: ASTM D449, Type II or Type III, as specified

3.Bituminous fabric: ASTM D173

906.03 Class II Dampproofing and Waterproofing

Provide materials conforming to the following: