00011312_Addendum One.pdf

ITB_ADDENDUM, S006-G031521

DATE: September 17, 2024 OREGON DEPARTMENT OF TRANSPORTATION

INVITATION TO BID

ADDENDUM NO. 1

ITB NO.: S-73000-00011491 CLOSING DATE: September 20, 2024 TIME: 3:00 pm

DESCRIPTION: Hwy 2 Over Herman Creek Conn Deck Resurfacing

BUYER: Ivory Williams EMAIL: ivory.williams@odot.oregon.gov PHONE: 503-910-9609

Requests for clarification, requests for change, and protests of this Addendum are due no later than:

Wednesday, September 18, 2024, at 4:00 pm.

This Addendum modifies the Invitation To Bid (ITB) document(s) only to the extent indicated herein. All other areas not changed or otherwise modified by this Addendum remain in full force and effect. This Addendum is hereby made an integral part of the ITB document. Bidder must be responsive to any requirements of this Addendum as if the requirements were set forth in the ITB. Acknowledge receipt of this Addendum by indicating its number in the spaces provided ITB Section H – Addenda Acknowledgement. Failure to do so may result in Bid rejection. See the ITB regarding pre-opening modifications of Bids, where to send Bid modifications, requests for clarification or change and protests of this Addendum, and the deadlines for the foregoing.

THE PURPOSE OF THIS ADDENDUM IS TO:

1. Revise Attachment B - Special Provisions SECTION 00745 - ASPHALT CONCRETE PAVEMENT -

STATISTICAL ACCEPTANCE

The following specifications are added to Section 00745 of Attachment B – Special Provisions:

Subsection 00745.11(b) Asphalt Cement Additives - This subsection is modified as follows:

00745.11(b) Asphalt Cement Additives – The bullet that begins with the words “Antistripping asphalt cement…” is deleted.

Subsection 00745.11(d) Liquid Anti-Stripping Additive - This subsection is added after Subsection 00745.11(c):

00745.11(d) Liquid Anti-Stripping Additive – An asphalt cement liquid anti-stripping additive (LASA) may be used instead of lime treatment of aggregate.

(1) General - To be considered for use, the LASA must meet the following criteria:

• Be designated as an asphalt anti-strip, with test results posted on the Warm Mix Asphalt

Technologies category of the National Transportation Product Evaluation Program (NTPEP). NTPEP test results must indicate an increase of 10% or greater in TSR (AASHTO T 283). The TSR results must be on durable aggregate, not limestone.

• Be approved for use in another State DOT as an anti-stripping additive.

ITB_ADDENDUM, S006-G031521

If a product meets both criteria, it may be used in the JMF development according to the ODOT Contractor Mix Design Guidelines for Asphalt Concrete. The standard addition rate of LASA for the JMF is the rate the NTPEP testing was performed. If no rate is published, the minimum rate will be 0.5% of the virgin binder. For published rates of 0.5% to total binder or higher, the minimum rate may be reduced to 0.5% of the virgin binder.

Approval of the JMF is also dependent on Hamburg Wheel-track Testing results conducted at the ODOT Central Materials Laboratory. Minimum requirements according to AASHTO T 324 are:

Rut depth at 20,000 passes (Level 4 wearing Course) 7mm max.

Rut depth at 20,000 passes (All others) 10mm max.

Stripping inflection point at 20,000 passes none

The test is ran for 20,000 passes. The test temperature is 50° C.

(2) Addition to Asphalt Cement - Blend the LASA at the asphalt terminal prior to delivery to the Mixing Plant. Use LASA compatible with the asphalt cement. The blended product must comply with all asphalt cement requirements. Do not change the LASA addition rate without prior approval from the Engineer.

(3) Field Testing During Production - At the Agency’s discretion, production mixture may be tested at the Central Materials Laboratory. Failure to meet the criteria listed above shall require a change in addition rate, a change of approved LASA, or may require lime-treatment of aggregate to continue production.

Subsection 00745.90 Payment –This Subsection is modified as follows:

In the paragraph that begins "No separate or additional payment…", add the following bullet to the end of the bullet list:

• liquid anti-stripping asphalt cement additives