835Resealing Joints and Sealing Cracks Inexisting Pccp and Hma Pavements

- RESEALING JOINTS AND SEALING CRACKS IN EXISTING PCCP AND HMA PAVEMENTS RESEALING JOINTS AND SEALING CRACKS IN EXISTING PCCP AND HMA PAVEMENTS

835.1DESCRIPTION

Concrete Pavement. Re-saw the longitudinal and transverse joints, and saw or rout the random cracks in the PCCP at the locations designated in the Contract Documents or as required by the Engineer. Clean and fill the sawed or routed joints and cracks with hot type joint sealing compound. Asphalt Pavement and Concrete Pavement with Spalled Joints and Cracks. Prepare the existing cracks and joints at the locations designated in the Contract Docume nts or as required by the Engineer. Fill the cracks and joints with the specified materials. Asphalt Shoulder Adjacent to Concrete Pavement. Clean the existing longitudinal joint between PCCP and asphalt shoulder at the locations designated in the Contract Documents or as required by the Engineer. Fill the joint with hot fiber-reinforced asphalt. The bid items in this section are exempt from SECTION 104. There will be no price adjustments due to quantity changes for these items. B I D I T E M S U N I T S Sealing PCCP Joints (Longitudinal) Linear Foot Sealing PCCP Joints (Transverse) Linear Foot Sealing PCCP Cracks (> ⅛" <2") Linear Foot Sealing Spalled PCCP Joints & Cracks (>2" ≤3") Linear Foot Sealing Spalled PCCP Joints & Cracks, Type A or B (>2" ≤3") Linear Foot Sealing Asphalt Cracks (>⅛" ≤ ½ " ) L i n e a r F o o t Sealing Asphalt Cracks (> ½" <2") Linear Foot Sealing Longitudinal Asphalt Shoulder Joint Linear Foot

835.2MATERIALS

complies with DIVISION 1500. When required, provide backer rod intended for use with the hot type joint sealing compound.

polypropylene fibers. Provide a mixture that has not less than 8% fiber content by weight. Provide PG 64-22 asphalt binder that complies with DIVISION 1200. Provide polypropylene fibers suitable for the intended use that have a denier of 15 ± 3. The Engineer will accept the polypropylene fibers based on a Type D Certification according to DIVISION 2600 , and visual inspection of the mixture.

that complies with DIVISION 1700. Provide foam core backer board intended for use with the rapid-set concrete patching material.

835.3CONSTRUCTION REQUIREMENTS.

surfaces of the cut removing the existing sealant. Configure the transverse joints according to FIGURE 835-1 . - RESEALING JOINTS AND SEALING CRACKS IN EXISTING PCCP AND HMA PAVEMENTS FIGURE 835-1: PCCP SAWED TRANSVERSE JOINT DETAIL 4 3 TABLE 835-1: PCCP SAWED JOINT DIMENSIONS* Joint Width Recess Below Surface Sealant Thickness Backer Rod Diameter Total Joint Depth ¼" ⅛" to ¼" ⅜" ⅜" 1" ⅜" ⅛" to ¼" ⅜" ½" 1⅛" ½" ⅛" to ¼" ⅜" ⅝" 1¼" ⅝" ⅛" to ¼" ½" ¾" 1½" ¾" ⅛" to ¼" ½" ⅞" 1 ⅝" ⅞" ⅛" to ¼" ½" 1" 1¾" 1" ⅛" to ¼" ½" 1⅛" 1⅞" 1½ " ⅛" to ¼" ¾" 1¾" 2 ⅜" 2" ⅛" to ¼" 1" 2½" 3⅝" *All dimensions are nominal. Clean, and fill the transverse joints according to subsections 502.3g.(8) and (9).

cleaning both surfaces of the cut, and, removing all existing sealant Configure the longitudinal joints to the width in column 1 in TABLE 835-1, with the depth equal to the original depth of the longitudinal joint. Clean and fill the longitudinal joints according to subsections 502.3g.(8) and (9). Fill the longitudinal joint with hot type joint sealant compound to within ⅛ to ¼ inch of the surface. Do not use backer rods in the longitudinal joints.

than the crack and to a depth equal to the full width of th e blade to produce a cut on eac h side of the crack for the full length of the crack. Clean, a nd fill the random cracks according to subsections 502.3g.(8) and (9). Fill the random cracks (routed or sawed reservoir) with a hot type joint sealing compound to within ⅛ to ¼ inch of the surface. Do not use backer rods in the random cracks.

Remove all foreign material that will prevent bonding of the sealant. Clean the joints and cracks by sandblasting. Remove loose material on the surface immediately adjacent to the joints and cracks. Do not seal PCCP spalled joints or cracks greater than 3 inches wide. If the PCCP joints and cracks are 3 inches or less wide and 1 ⅝ inches or less deep, fill the joints and cracks with hot fiber-reinforced asphalt. See FIGURE 835-2. Fill the joints and cracks to a level slightly recessed from the pavement surface. - RESEALING JOINTS AND SEALING CRACKS IN EXISTING PCCP AND HMA PAVEMENTS FIGURE 835-2: SEALING PCCP, SPALLED JOINTS AND CRACKS (>2" ≤ 3" wide, ≤1⅝" deep) >2" ≤ 3" ≤1⅝” Clean and fill with hot fiber- reinforced asphalt. If the PCCP joints and cracks are 3 inches, or less, wide and greater than 1 ⅝ inches deep, use either the Type A option (FIGURE 835-3) or the Type B option (FIGURE 835-4) to fill the joints and cracks: FIGURE 835-3: TYPE A, SEALING PCCP, SPALLED JOINTS AND CRACKS (>2" ≤ 3" wide, >1⅝" deep) >2" ≤ 3" > 1 ⅝" Clean, place the foam core backer board, and fill with rapid-set concrete patching material on both sides of the backer board. After the patching material is set, remove the backer board and fill the reservoir with hot type joint sealing compound. FIGURE 835-4: TYPE B, SEALING PCCP, SPALLED JOINTS AND CRACKS (>2" ≤ 3" wide, >1⅝" deep) >2" ≤ 3" 1⅝" >1⅝" Clean, place the backer board to within 1⅝" of the surface, fill the lower cavity with rapid-set concrete patching material on both sides of the backer board, to the top of the backer board. After the patching material is set, fill the upper cavity with hot fiber-reinforced asphalt (do not remove the backer board). Fill the joints and cracks to a level slightly recessed from the pavement surface.

Do not seal cracks less than ⅛ inch wide. Do not seal cracks wider than 2 inches. See FIGURE 835-5. - RESEALING JOINTS AND SEALING CRACKS IN EXISTING PCCP AND HMA PAVEMENTS Rout all the cracks that are ⅛ to ½ inch wide following the existing crack. Route cracks ⅛ to ⅜ inch with a ⅝ inch router head, ⅜ to ½ inch with a ¾ inch router head and to a depth equal to or greater than the router head width. Cracks wider than ½ inch do not require routing. Clean the full depth of the cracks. Remove all foreign material that will prevent bonding of the sealant. Remove loose material on the surface immediately adjacent to the joints and cracks. Clean and dry the cracks with a heat lance. Do not burn the pavement (indicated by smoke) with the heat lance. Fill the routed cracks ( ⅛ to ½ inch) with hot type joint sealing compound. Fill un-routed cracks wider than ½ inch with hot fiber-reinforced asphalt. Fill all cracks to a level slightly recessed from the pavement surface. FIGURE 835-5: SEALING ASPHALT PAVEMENT CRACKS) (>⅛"<2") Note: Cracks > ⅛", but < ⅜" and > ⅜" but </= ½" wide shall be routed to a depth and width of ⅝" and ¾" respectively, then cleaned and filled with hot type joint sealing compound asphalt. Do not rout cracks >1/2" wide. Clean and fill cracks >1/2" wide with hot fiber-reinforced asphalt.

a minimum of ½ inch by 1inch or ⅛ inch greater than the width of the existing crack 1 inch deep Clean the joints as required in subsection 502.3g.(8). Fill the joint with hot fiber-reinforced asphalt. Fill the joint with sealant to within ⅛ to ¼ inch of the surface. Do not use backer rods in the joints.

date of the initial installation. Demonstrate competence in applying sealant to the Engineer and the manufacturer’s representative. Do not perform operations or procedures that would be detrimental to the sealing of joints and cracks. This requirement will be waived for experienced Contr actor’s crews. Submit waiver request, along with a list of joint sealant crews successfully completed joint and crack sealing projects, to the Engineer for consideration.

manufacturer.

• the ambient air temperature is below 40°F, or • the pavement temperature is above 105°F.

835.4MEASUREMENT AND PAYMENT

The Engineer will measure sealing of joints and random cracks by the linear foot along the center of the joint or crack. The bid items in this section are exempt from SECTION 104. There will be no price adjustments due to quantity changes for these items. Payment for "Sealing PCCP Joints (Longitudinal)", "Sealing PCCP Joints (Transverse)", "Sealing PCCP Cracks (>⅛" <2")", "Sealing Spalled PCCP Joints & Cracks (>2" ≤3")", "Sealing Spalled PCCP Joints & Cracks, Type A or B (>2" ≤3")", "Sealing Asphalt Cracks (> ⅛" ≤ ½")", "Sealing Asphalt Cracks (> ½" <2")" and "Sealing Longitudinal Asphalt Shoulder Joint" at the contract unit prices is full compensation for the specified work.