SECTION 411: HOT-POURED CRACK SEALANT
411.1 Description
This Work consists of preparing and cleaning cracks and joints in the existing Roadway surface and sealing these cracks with hot-poured sealant.
411.2 Materials
For crack and joint seals, the Contractor shall use hot-poured sealant in accordance with the general and physical requirements of ASTM D 6690, as specif ied in the Contract and shall be on the Departments Approved Product List (APL). The Contractor shall have the Supplier sample and test the sea lant in accordance with ASTM D 6690 and provide certifi ed test results for each lot or batch of sealant supplied. The Contractor shall provide sealant packaged in containers an d labeled in accordance with ASTM D 6690. Bulk shipments of sealant must be accompanie d by documents that state the following: 1. Manufacturer’s name; 2. Trade name of the sealant; 3. Batch or lot number; 4. Pouring temperature; and 5. Safe heating temperature. The Contractor shall not mix more than one (1) lot or batch wi thin a bulk shipment of sealant.
411.3 Construction Requirements
411.3.1 Temperature and Weather Limitations
The Contractor shall apply the sealant in the following condit ions: 1. When the air temperature is at least 40 °F and rising; and 2. When the temperature of the existing pavement surface is abo ve 32 °F during application; or 3. As indicated on the manufacturers recommendations. The Contractor shall not place the sealant during inclement we ather, on wet surfaces, or when the wind conditions prev ent satisfactory sealing.
411.3.2 Equipment
The Contractor shall: 1. Provide router bits of at leas t 1/2-inch diameter that cut t o one (1) inch deep; 2. Use air compressors that provide uncontaminated air at a pre ssure capable of cleaning approved cracks; and 3. Equip air compressors with traps to prevent oil and moisture from entering the air stream. Section 411: Hot-Poured Crack Sealant Page 179 The Equipment for heating and preparing the sealant mixture sh all provide a continuous supply of the prepared mixture and maintain a continuous, unifo rm and homogeneous mixture during the sealing operation. The Contractor shall provide con tinuous mechanical agitation as necessary to maintain homogeneity. The Contractor shall use applicat ion devices that provide unif orm application of the sealant Materials without cloggi ng, or causing other irregulari ties in distribution. Application devices and Equipment shall mee t the requirements of the sealan t manufacturer.
411.3.3 Preparation of Cracks
The Contractor shall: 1. Route and clean cracks to the satisfaction of the Project Ma nager; 2. Route cracks with an average clear opening less than 1/2 inc h to provide a minimum sealant reservoir of 1/2 inch wide and to a depth of fr om 3/4 inch to one
1.inch, unless otherwise directed by the Project Manager. Ce nter routers over the cracks during routing operations; 3. Clean cracks with an average clear opening 1/2 inch or great er with high-velocity compressed air to a depth of from 3/4 inch to one (1) inch, unl ess otherwise directed by the Project Manager; and 4. Clean loose particles, dust, and other Deleterious Materials , immediately before placing the sealant from the seal ant reservoirs with high-veloc ity compressed air.
411.3.4 Application of Sealant
The Contractor shall: 1. Control the application to c onfine sealant within the reserv oirs; 2. Apply sealant to the clean, dry -surfaced reservoirs to a dep t h o f f r o m 3 / 8 i n c h t o 1/4 inch below the existing surface of the Roadway. If the Pro ject Manager determines that the method of filling results in an excessive a mount of sealant on the pavement surface, stop filling and change the method. Clea n excess sealant Material from the pavement surface; 3. Halt operations if applicati on devices clog or irregularitie s occur during application and take corrective action immediately; and 4. Follow special preparation or placement requirements indicat ed by the manufacturer.
411.3.5 Resumption of Traffic The Contractor shall cure sealant in accordance with the manuf acturer’s requirements,
before placing traffic on the pavement surface.
411.4 Method of Measurement
The Department will verify the measured quantity with the Contr actor daily.
411.5 Basis of Payment
Pay Item Pay Unit Hot-Poured Crack Sealing Pound
411.5.1 Work Included in Payment
The Department will consider as included in the payment for th e pay item(s) listed in this section and will not measure or pay separately for the followin g Work: 1. Prepare, clean, and fill cracks and joints with hot-poured s ealant on the existing Roadway. Section 412: Hot In-Place Recycling of Asphalt Pavement (Remixing Method) Pa ge 181
Source: New Mexico Standard Specifications for Highway and Bridge Construction, 2019 Edition. Pages 0–0 of 974.