55-Sec 32 01 17.61 - POLYMER MODIFED ASPHALT JOINT AND CRACK SEALING.pdf

POLYMER MODIFIED ASPHALT JOINT AND CRACK SEALING

32 01 17.61-1

SECTION 32 01 17.61

PART 1 GENERAL

1.01 SECTION INCLUDES

A. Asphaltic Joint and Crack Sealing

1.02 DESCRIPTION OF WORK

A. This work is the cleaning and sealing of pavement surface joints associated with the removal and replacement of concrete curb and curb ramps with polymer modified asphalt.

PART 2 PRODUCTS

2.01 ASPHALT CEMENT PG 64-22

A. Obtain material meeting the requirements of PennDOT Bulletin 25 from a producer listed in Bulletin 15.

1. Quality Control Section 01 40 00

2. Certification

a. General

1) When a bituminous material tank is filled, submit a copy of the required test results to the MTD for verification of compliance with Department specifications.

2) Specify the type of material, tank number, and company lot number of the certificate for cross-reference to the bill of lading.

3) Have a responsible company official sign the certificate.

4) Obtain a verification sample from each batch. A batch is a tank completely filled, partially filled, or refilled with a blend of residual and new material.

5) Test one-half (1/2) sample and forward the results to the MTD. Forward the remaining one-half (1/2) sample to the MTD for testing. The MTD will evaluate quality control on the basis of three (3) consecutive verification samples.

b. Levels of Certification

1) Use the same levels of certification as specified in PennDOT Publication 408, Section 701.1(b)2, except substitute the word “batch” for the word “silo.”

c. Handling and Transportation, Section 01 60 00

1) Furnish the vendor’s bill of lading for each shipment (one copy retained by the vendor and one copy included with the shipment to the project). Use a form acceptable to the MTD, containing the following information:

a) Statement that material has been testing and meets Department specifications.

b) Class of Material

c) Tank Number

d) Company Batch Number

e) Date of Shipment

f) Producer’s Name and Location

g) Name and Location of Consignee, (Bituminous Concrete Plant or

32 01 17.61-2

Maintenance District)

h) Mix or Application Temperatures, Minimum and Maximum

i) Viscosity at 140F

j) Penetration at 77F

k) Trailer Number

l) Specific Gravity of Asphalt Cement at 77F

m) Statement that the material is compatible with job aggregate E-4, E-5, E-10, E-11, E-12, MC-400, and MC-800

n) Percent Bitumen Residue by Weight (for liquid bituminous materials only)

o) Quality of Material

p) Statement that the shipment container was determined to be reasonably free of contamination immediately prior to loading

PART 3 EXECUTION

3.01 GENERAL

A. Provide a mixture of asphalt cement and reclaimed granulated rubber, combined to the specified proportions, or furnish a premixed composition as specified in Section 469.2(c) or (d).

3.02 MIXING PROCEDURES

A. Combine the PG 64-22 and reclaimed granulated rubber to obtain a mixture having proportions of two (2 lbs) pounds of RGR per gallon of asphalt cement. Blend the PG 64-22 and reclaimed granulated rubber in an oil-jacketed double wall kettle (indirect hating) equipped with agitator and two (2") inch hot asphalt pump. Provide separate thermometers for oil bath. Heat and agitate the mixture with the temperature range of 350F - 380F for thirty

(30) minutes. Do not allow the operating temperature in the kettle to exceed 400F.

B. For premixed material, as specified in Section 469.2(c) or (d), obtain the safe heating temperature range and recommended pouring temperature from the manufacturer’s shipping container. Place the material within this temperature range, and as close as possible to the recommended pouring temperature. Maintain a safe heating temperature. Do not maintain any single batch of material at the pouring temperature for more than four (4) hours. Reheat only in accordance with manufacturer’s recommendations.

3.03 SURFACE PREPARATION

A. Apply sealer only after joints and adjacent pavement surfaces are clean, dry, and free of any loose material and debris. Clean the pavement for four (4") to six (6") inches on either side of the joint. Air blast joints immediately prior to sealing. Use a compressed air stream of at least 100 psi measured at the source, or use a hot compressed air lance for cleaning and drying damp cracks in the bituminous pavements. Care should be taken to ensure that damage to the surrounding pavement area from overheating does not occur. Seal joints (1/8) to one (1") inch wide with polymer modified asphalt.

3.04 SEALING

A. Apply polymer modified asphalt to prepared joints, level with the pavement surface, using a wand followed by a standard “V” shaped asphalt squeegee. Leave no more than 1/8 inch buildup. Do not place sealer when the air temperature is below 40F or above 90F, unless otherwise permitted by the Engineer if the hot compressed air lance used can sufficiently warm the crack to ensure adhesion between the pavement and the sealer. Do not place bituminous overlay within seventy-two (72) hours of sealing unless permitted by Engineer.

02547-3

END OF SECTION