Viewing inquiries for 10-0V6604

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Inquiry #1: Will this project have a flex start? Since this project is primarily a paving project, there will be a couple different JMF's to submit. The Contractor will need time before the project starts to create and submit the JMF's.
Inquiry submitted 06/27/2014

Response #1: Submitted for consideration.
Response posted 06/27/2014


Response #2: Bids must be on a cost plus time basis. Section 8-1.05 of the Revised Standard Specifications states, "Complete the work within the Contract time."
Response posted 07/03/2014




Inquiry #2: In Section 39 Hot Mix Asphalt of the Special Provisions, on page 38, paragraph 1 states: “Replace the 2nd, 3rd, and 4th paragraphs of section 39-1.03D(1) of the RSS for section 39 with: Place HMA on adjacent traveled way lanes so the at the end of each work shift the distance between the ends of HMA layers on adjacent lanes is from 5 to 10 feet…Delete section 39-1.03D(2) of the RSS for section 39 (Tapered Notched Wedge)”.
In Section 39-1.03G Shoulder, Medians, and Other Road Connections of the RSS, on page 170, the last paragraph states: “If shoulders or median boarders are shown, pave shoulders and median borders adjacent to the lane before opening a lane to traffic”.
The current specifications require the contractor to pave all lanes and shoulders up even each work shift (to within the 5 to 10 feet requirement). The project can be completed in considerably less time, and at less taxpayer expense by allowing the lanes to be paved separately utilizing the Notched Wedge RSS Specification, 39-1-1.03(2). Please revise the special provisions to allow this method of paving.

Inquiry submitted 07/23/2014

Response #1: Submitted for consideration.
Response posted 07/24/2014


Response #2: Temporary conform tapers are required as specified in Section 39-1.03D(1) of the Special Provisions. The specifications will not be revised.
Response posted 07/28/2014




Inquiry #3: Can Jointed Precast Pavement (027677 PJCP)or Individual Precast Slab Replacement (027679 IPSR) be used as an alternative to the Jointed Plain Concrete Pavement (RSC)?
Inquiry submitted 07/25/2014

Response #1: submitted for consideration.
Response posted 07/28/2014


Response #2: No, rapid strength concrete (RSC) is specified for jointed plain concrete pavement. Please bid per contract.
Response posted 07/28/2014




Inquiry #4: For section 39-1.01D(2) Job Mix Formula
If the Engineer's test results on plant-produced samples do not show compliance with the specifications,
the Engineer notifies you. Adjust your JMF based on your testing unless the Engineer authorizes
reverification without adjustments. JMF adjustments may include a change in:
1. Asphalt binder content target value up to ±0.2 percent from the OBC value submitted on Contractor
Hot Mix Asphalt Design Data form
2. Aggregate gradation target values within the target value limits specified in the aggregate gradation
table

Will adjustments to the gyration levels for RHMA be accpetable during a failed JMF? Caltrans has made concessions and language is being developed to allow gyration level adjustments during a failed RHMA JMF verificaiton attempt. During design you are allowed gyration levels between 50 to 150 gyrations. Contractors should be allowed to make these same adjustments in the event of a failed RHMA JMF.

Inquiry submitted 07/28/2014

Response #1: Submitted for consideration.
Response posted 07/28/2014




Inquiry #5: Section 39-1.01D(2) JMF verificaiton
If the Engineer's test results on plant-produced samples do not show compliance with the specifications,
the Engineer notifies you. Adjust your JMF based on your testing unless the Engineer authorizes
reverification without adjustments. JMF adjustments may include a change in:
1. Asphalt binder content target value up to ±0.2 percent from the OBC value submitted on Contractor
Hot Mix Asphalt Design Data form
2. Aggregate gradation target values within the target value limits specified in the aggregate gradation
table
You may adjust the JMF only once due to a failed verification test.

During a failed RHMA JMF, will the contractor be allowed to adjust the gyratory pressure between 600KPA and 825KPA? These adjustments are allowed during design and should be allowed in the event of a failed RHMA verfication attempt.

Inquiry submitted 07/28/2014

Response #1: Submitted for consideration.
Response posted 07/28/2014




Inquiry #6: Section 39-1.01D(6) and (6)(a) Certifications/General
Laboratories testing aggregate and HMA qualities used to prepare the mix design and JMF must be
qualified under AASHTO Materials Reference Laboratory program and the Department's Independent
Assurance Program.

Caltrans has recognized that district labs peforming accpetance testing must be qualified under the AASHTO reference laboratory program as of July 1 2014.

Will the spec language for section 39-1.01D(6)(a) be changed to include labortories performing accpetance testing and laboratories performing quality control testing?

Inquiry submitted 07/28/2014

Response #1: Submitted for consideration.
Response posted 07/28/2014




Inquiry #7: For section 39-1.01D(9)(a) Department Acceptance/General
The Engineer takes HMA samples for AASHTO T 283 and AASHTO T 324 (Modified) from one of the
following:
1. Automatic sampling device at the plant
2. Automatic sampling device at the truck
3. Windrow
The Engineer takes HMA samples for all other tests from one of the following:
1. Automatic sampling device at the plant
2. Automatic sampling device at the truck
3. Windrow
4. Mat behind the paver

Specificaiton language has been agreed to be changed. Automatic Sampling Device at the plant should be deleted. Will the specificaiton be amended to include the language change for automatic sampling device at the plant?

Inquiry submitted 07/28/2014

Response #1: Submitted for consideration.
Response posted 07/28/2014




Inquiry #8: Section 39-1.01 D(9)Department Acceptance (a) General:"Except for smoothness, if 2 consecutive Department acceptance test results or any 3 Department
acceptance test results for 1 day's production do not comply with the specifications:
1. Stop HMA production
2. Take corrective action
3. Demonstrate compliance with the specifications before resuming production and placement

Will an addendum be provided to update the specification to the current version dated 5/30/2014 which defines failed gradation under AASHTO T27 - "For Department acceptance tests performed under AASHTO T 27, results are considered 1 Department acceptance test regardless of the number of sieves out of compliance."

Inquiry submitted 07/28/2014

Response #1: Submitted for consideration.
Response posted 07/28/2014




Inquiry #9: For section 39-1.02D(2) Aggregate Gradations
Aggregate gradation must be determined before the addition of asphalt binder and must include
supplemental fines. Test for aggregate gradation under AASHTO T 27. Note 4 of AASHTO T 27 and
AASHTO T 11 do not apply. Use a mechanical sieve shaker. Aggregate shaking time must not exceed 10
minutes for each coarse and fine aggregate portion.
Choose a target value within the target value limits shown in the tables titled "Aggregate Gradations."
Gradations are based on nominal maximum aggregate size.

Caltrans has agreed to language stating that AASHTO T27 note 4 and AASHTO T11 do not apply to the coarse fraction of the gradation. Will there be an addendum issued with the new specificaiton language?

Inquiry submitted 07/28/2014

Response #1: Submitted for consideration.
Response posted 07/28/2014




Inquiry #10: For section 39-2.01D(5) Department Acceptance table, type a HMA acceptance in place air voids; specification for AASHTO T269 states 4% +/-1.5%.


Tech Brief by FHWA "FHWA-HIF-11-032" states carefully controlled experiments showed that air voids can differ as much as 1.0% when the same tech molds a set of specimens in two different, but properly calibrated super pave gyratory compactors. Furthermore, data from AASHTO Materials Reference Laboratory indicated that multiple lab precision of SGC compacted samples by accredited labs was so poor that the acceptable range of air voids between two labs maybe as much as 1.8%.

Will and addendum be issued to address the acceptable standard diviation of 1.8% air voids between multiple labs which is larger than the current speciication production tolerances for air voids?


Inquiry submitted 07/28/2014

Response #1: Submitted for consideration.
Response posted 07/28/2014




Inquiry #11: For Section 39-1.02K Miscellaneous Areas and Dikes
For miscellaneous areas and dikes:
1. Choose either the 3/8-inch or 1/2-inch aggregate gradation for Type A HMA.
2. Minimum asphalt binder content must be 6.8 percent for 3/8-inch aggregate and 6.0 percent for 1/2-
inch aggregate. If you request and the Engineer authorizes, you may reduce the minimum asphalt
binder content.
3. Choose asphalt binder Grade PG 64-10, PG 64-16 or PG 70-10.
For HMA used in miscellaneous areas and dikes, sections 39-1.01C, 39-1.01D, 39-1.02B, 39-1.02D(3),
and 39-1.02E–J do not apply.

Caltrans recently made the move from Dry Wieght of Aggregate to Total Wieght of Mix for OBC. Spec language has been changed to identify the minimum binder content by TWM. Will addendum be issued modifying the specificaiton language?
Is the 6.8 and 6.0 Min binder contents TWM or DWA?

Inquiry submitted 07/28/2014

Response #1: Submitted for consideration.
Response posted 07/28/2014




Inquiry #12: For section 39-1.03A Construction/General
HMA placed in a windrow on the roadway surface must not extend more than 150 feet in front of the
loading equipment or material transfer vehicle.

Can the contractor be alleviated of this requirment, it serves no purpose especially when required to meet lay down tempature for break down, intermediate, and finish rolling?

Inquiry submitted 07/28/2014

Response #1: Submitted for consideration.
Response posted 07/28/2014




Inquiry #13: For section 39-2.02D(2) Aggregate Gradations
Table heading states pavement thickness

Is this total pavement thickness as shown on plans or total layer thickness?

Please clearify.

Inquiry submitted 07/28/2014

Response #1: Submitted for consideration.
Response posted 07/28/2014




Inquiry #14: Section 39-2.02F Hot Mix Asphalt Production
Referes to mandatory HMA plant set point.

Caltrans has agreed to remove this set point requirment during production, will an addendum be issued to remove this requirement?

Inquiry submitted 07/28/2014

Response #1: Submitted for consideration.
Response posted 07/28/2014




Inquiry #15: Section 12-4.02A of the Special Provisions states: “The maximum length of the work area inside a lane closure other than one-way reversing traffic-control lane closure is 1 miles. Work area is as shown. Not more than 2 stationary lane closures will be allowed in each direction of travel at one time. Concurrent stationary closures in the same direction of travel must be spaced no closer than 10 miles apart. Closures in the same direction of travel on alternating inside lane/outside lanes must be spaced by an additional 10 miles.”

In order to minimize the duration of construction and impacts to the traveling public for this project, we request the Department change the requirements in Section 12-4.02A as follows:
1.) Increase the length of work area inside a lane closure to 2 miles.
2.) Reduce the minimum spacing between 2 concurrent stationary lane closures to 5 miles.
3.) Eliminate the restriction that closures in the same direction of travel be spaced further apart when the closures are in alternating inside lane/outside lanes. The existing requirement is very restrictive when coupled the existing project requirement to pave contiguous each shift which requires flopping lane closures between inside/outside lanes in the middle of a shift while paving.
4.) Due to the fact that the project is over 40 miles long, allow 3 stationary lane closures in each direction of travel at one time provided that the third lane closure is spaced no closer than 10 miles to any other lane closure in the same direction of travel.

Inquiry submitted 07/28/2014

Response #1: Submitted for consideration.
Response posted 07/28/2014




Inquiry #16:
Section 15-2.02B(3)(a) of the Special Provisions states: “For locations not listed above, schedule cold planing activities so that not more than 24 hours elapses between the time the pavement is cold planed and the HMA is placed.”

In order to minimize the duration of construction and impacts to the traveling public for this project, we request the Department change the requirements in Section 15-2.05B(3)(a) as follows:
1.) For cold planning pavement transitions: Require the scheduling of cold planing activities so that no more than 7 calendar days elapse between the time that the pavement is cold planed and the HMA is placed.
2.) For full lane cold planning in the NB lanes of Jan Joaquin County from PM 0.30 to PM 12.40: Require the scheduling of cold planing activities so that no more than 5 calendar days elapse between the time that the pavement is cold planed and the HMA is placed and require that HMA is placed in these cold planed areas prior to the end of each work week.

Inquiry submitted 07/28/2014

Response #1: Submitted for consdieration.
Response posted 07/28/2014




Inquiry #17: In review of the plans and existing site conditions of the project, we have noticed that there is a considerable amount of "Roadway Excavation" type work to be performed to to remove earth material before “Remove Ac Dike” item can be performed. The Department does not address this area in regards to a unit of measure or method of payment as there is no Roadway Excavation bid item. Can the Department please clarify how the Contractor will be compensated to remove the earth like material away from the dike prior to the dike removal?
Inquiry submitted 07/28/2014

Response #1: Submitted for consdieration.
Response posted 07/28/2014




Inquiry #18: One of the first orders of work on this project will be to remove the AC Dike which will allow the Contractor to place HMA on the shoulder in preparation for placing RHMA on the same shoulder. The typical cross sections show both HMA and RHMA under the new dike. However, the Department has not addressed the need for Temporary HMA Dike that may be required to protect the slopes in the event of a temporary suspsension as a result of the approaching rainy season. Since the Department is bidding this project so late in the construction season, we are seeking a bid item for Temporary HMA Dike.
Inquiry submitted 07/28/2014

Response #1: Submitted for consdieration.
Response posted 07/28/2014






The information provided in the responses to bidder inquiries is not a waiver of Section 2-1.03, “Examination of Plans, Specifications, Contract, and Site of Work,” of the Standard Specifications or any other provision of the contract, nor to excuse the contractor from full compliance with the contract. Bidders are cautioned that subsequent responses or contract addenda may change a previous response.