CTR057732_Contract_Amendment_Summary_Four__4_.pdf
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- Attached to
- Master Agreement AZ|CTR057732
- Contract number
- CTR057732
- Issued by
- Arizona
About this file
This document is a Contract Amendment Summary issued by the Arizona Department of Transportation (ADOT) Procurement division, specifically Amendment Number Four for a contract with Cactus Transport Inc. The amendment pertains to a Polymer Modified Rejuvenating Emulsion (PMRE) contract and details technical specification changes for bituminous material applications.
The amendment provides detailed modifications to specifications for applying bituminous material, including precise temperature requirements for surface and ambient conditions. It establishes comprehensive technical standards for the emulsion, including requirements for viscosity, residue, oil distillate, particle charge, storage stability, and polymer content. The document includes specific testing methods and requirements for the emulsion's properties, such as elastic recovery, flash point, kinematic viscosity, and saturates percentage. The amendment introduces precise measurement protocols, including complex dynamic shear viscosity calculations, to ensure quality and consistency of the polymer modified rejuvenating emulsion used in road maintenance and construction applications.
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ARIZONA DEPARTMENT OF TRANSPORTATION
1739 W. Jackson Street, MD 100P
Phoenix, AZ 85007 602.712.7211
Contract Amendment Summary CONTRACTOR: Cactus Transport Inc. AMENDMENT NO.: Four (4)
DESCRIPTION: Polymer Modified Rejuvenating Emulsion (PMRE)
Rev. 04/2020
Procurement
Pursuant to the Uniform Terms and Conditions, Section 5, Contract Changes, the above referenced contract is amended. Summary of changes is as follows:
1. Specifications
a. Section 4.3.3. is hereby changed to read:
Bituminous material used in the Polymer Modified Rejuvenating Emulsion Fog Coat shall be applied to an existing bituminous surface only when the existing bituminous surface is dry, the pavement surface temperature is at least 50 degrees F but does not exceed 150 degrees F, and the ambient temperature at the beginning of the application of bituminous material is at least 50 degrees F and rising but does not exceed 100 degrees F.
b. Section 4.3.6. Polymer Modified Rejuvenating Emulsion (for Fog Coat) Table is hereby changed to reflect the following:
POLYMER MODIFIED REJUVENATING EMULSTION (FOR FOG COAT)
Test Property Test Method Requir ements
Tests on Emulsion (Prior to Dilution):
Viscosity, Saybolt Furol seconds, @ 25°C, range AASHTO T 59 50-150
Residue, by distillation ⁽¹⁾, % by weight, minimum AASHTO T 59 65
Oil distillate, % by volume, maximum AASHTO T 59 0.5
Particle Charge ⁽²⁾ AASHTO T 59 Positive
Sieve Test, retained on No. 20, % by weight, maximum AASHTO T 59 0.10
Storage Stability, 24 hours %, maximum AASHTO T 59 1.0
Tests on Residue from Distillation:
Viscosity⁽³⁾, @60°C, poises, maximum AASHTO T 315 5000
Penetration, @ 4°C, 200 grams, 60 seconds, 0.1 mm AASHTO T 49 10-50
Elastic Recovery ⁽⁴⁾, @10°C, 0/0, minimum AASHTO T 301 60
Latex/Polymer Certification: The manufacturer or supplier of the Polymer Modified Rejuvenating Emulsion shall certify that the emulsion contains a minimum of two (2%) percent polymer solids, by weight of the residual asphalt. The manufacturer or supplier shall also certify that the Polymer possesses long term stability in the presence of the asphalt and rejuvenation agent blend utilized.
Tests on Rejuvenating Agent
Flash point, Cleveland Open Cup, °C, minimum AASHTO T 48 190
Kinematic Viscosity, @ 60°C, cSt AASHTO T 201 50-175
Saturates, % by weight, maximum ASTM D 2007 30
ARIZONA DEPARTMENT OF TRANSPORTATION
1739 W. Jackson Street, MD 100P
Phoenix, AZ 85007 602.712.7211
Contract Amendment Summary CONTRACTOR: Cactus Transport Inc. AMENDMENT NO.: Four (4)
DESCRIPTION: Polymer Modified Rejuvenating Emulsion (PMRE)
Rev. 04/2020
Procurement
Asphaltenes, % by weight, maximum ASTM D 2007 1.0
Minimum Rejuvenating Agent 4.0% by weight of Base Asphalt
Tests on Residue (AASHTO T 240)
Mass Change, %, maximum AASHTO T 240 6.5
Kinematic Viscosity @ 60°C, cSt AASHTO T 201 Report
Kinematic Viscosity Ratio ⁽⁵⁾, maximum --- 3
(1) Exception to AASHTO T 59: Bring the temperature on the lower thermometer slowly to 350°F ± 10°F. Maintain at this temperature for 20 minutes. Complete total distillation in 60 ± 5 minutes from first application of heat.
(2) If the result of the particle charge test is inconclusive, material having a pH of 2.0 to 5.0 when tested in accordance with ASTM E 70, will be acceptable.
(3) Using procedures outlined in AASHTO T 315, the dynamic shear rheometer can be used to measure the complex dynamic shear viscosity (ⴄ*), which in turn is converted to viscosity, in poises, as shown below. This method is recommended when the emulsion residue contains polymer material that might interfere with measurement of absolute viscosity using capillary tubes.
1. Compute ⴄ* using the following equation:
ⴄ* = (G*ⱷ) x 1000
Where: ⴄ* = complex dynamic shear viscosity in Pa∙s.
G* = complex shear modulus of the emulsion residue in kPa, measured at 60°C (AASHTO T315) ⱷ = angular frequency @ 10 radians/second (AASHTO T 315) 1000 = unit conversion from Pa to kPa
2. Convert ⴄ* to viscosity, in poises, using the following equation:
µ = ⴄ* x 10
Where: µ = viscosity in poises.
ⴄ* = complex dynamic shear viscosity in Pa∙s 10 = unit conversion from Pa∙s to poises
2. All other terms, conditions and provisions of this contract remain unchanged.
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