403.01 Description
This work consists of routing, cleaning, and sealing the transverse and specified longitudinal cracks in accordance with Subsection 403.03.1 in the roadway surface with the specified sealant.
403.02 Materials
A.Crack Sealant. Use a sealant that is listed on the QPL and in accordance with Subsection 707.01.
B.Backer Rod. Furnish backer rod that is listed on the QPL. Furnish backer rod in accordance with ASTM D5249, Type 1. The backer rod used must be compatible with the crack sealant placement temperature and sized for cracks in accordance with Subsection
403.03 4.
C.Blotter Material. Use toilet paper or an approved liquid blotter material. The liquid blotter must be a commercially manufactured surfactant. Provide blotter that is not detrimental to the crack sealant or the surfacing material.
403.03 Construction Requirements
403.03.1 General
Work half of the roadway at a time. Limit routing and crack sealing work to 1 maximum 2.0-mile (3 km) work area. Submit the type of blotter material and application rates to be used. The application rate must be sufficient to protect the crack sealant material.
403.03.2 Routing
Rout all existing cracks that are between ⅛ and 1-inch (3 and 25 mm) wide. Rout all longitudinal cracks to produce straight ¾-inch (19 mm) vertical walls and a ¾-inch (19 mm) wide flat bottom reservoir. Rout the transverse cracks to produce straight ½-inch (13 mm) vertical walls and a 1½-inch (38 mm) wide flat bottom reservoir. Rout when the roadway is dry. Remove and dispose of the routed material from the roadway before opening the roadway to traffic.
403.03.3 Cleaning
The reservoir and crack must be dry and free of dust, dirt, and loose materials immediately before placing the backer rod, if applicable, and applying the sealant.
403.03.4 Sealing
Install backer rod in cracks 1½-inch (38 mm) wide and larger. Place sealant material as soon as practicable after the routed cracks are deemed clean and dry. Place sealant material within 24 hours of routing. Follow the sealant manufacturer’s handling, mixing and application temperature requirements. Meet the following requirements: • Ensure no moisture is present in cracks or reservoirs to prevent bubbling and non- adhesion of sealant during installation. • Apply sealant filling the reservoir flush to the top using a pressure type applicator. 403 – CRACK SEALING 2020 EDITION V5.1 403-2 • Do not allow sealant to collect or pool at the low end of crack or reservoir elevation. • Open the completed work to traffic once the sealant does not track; and • Repair or replace all seal work damaged by traffic at Contractor expense. Seal previously repaired cracks to restore water resistance. Spread and smooth the sealant as required to seal the reservoir, but do not exceed 2 inches of spread sealant on the roadway. Apply blotter material to all sealed cracks.
403.03.5 Temperature Limitations
Do not rout when the mat temperature is below 35 °F (2 °C). Apply the sealant when the roadway surface temperature is between 35 and 120 °F (2 and 49 °C).
403.04 Method of Measurement
Crack sealing is measured by the pound (kg) of material placed. Blotter material is not measured separately.
403.05 Basis of Payment
Payment for the completed and accepted quantities is made under the following: Pay Item Pay Unit Crack Sealing Pound (kg) Blotter material is included in the contract unit price and is not paid for separately.
Referenced in this section
Crack Sealing in other states
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Source: Standard Specifications for Road and Bridge Construction, 2020 (v5.1) Edition. Pages 257–258 of 611. View official source ↗