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State Materials Office
Q: When
do we start collecting the data on the Asphalt Roadway - As
Built Pavement Data Form
(# 700-050-12)?
A: If there are ongoing projects with the Asphalt operation being done, you may start collecting this information now.
Q: Who is the person responsible to fill out the Asphalt Roadway - As Built Pavement Data Form (# 700-050-12)?
A: The verbiage that is inserted into the Preparation and Documentation Manual, Chapter 4, Sub-Section 4.4.10 states that on conventional projects the Project Engineer will be responsible to complete the form as the project progresses and upload the data into "LIMS" (Laboratory Information Management Software).
On CQC (aka QC 2000) projects the Verification Technician will be responsible for this task. Under the CQC Contracts the "Verification Technician" is defined as a Department representative.
The statements above will be in the Prep & Doc. Manual, Chapter 4.
Q: Does an Asphalt Producers QC Plan require a QC Manager be identified for approval?
A: No
Q: If
a truck from which a random sample is pulled is wasted, is the
sample invalid?
A: A lot is defined and random numbers are determined prior to the start of a lot.
Any tonnage, which is not used on or off the project, will be excluded from the CQC pay factor calculations when the lot is completed. If you establish a 2000-ton lot and portions of that lot are diverted to uses other than the CQC part of the job that tonnage will be recorded and deducted from that lots tonnage. (2000 - 1283 = 717) In this case you would calculate pay factors based on tests pulled according to the established random numbers for that lot. You will apply those pay factors to 717 tons. The lot quantity will be shown as 717 tons. It will be noted that 1283 tons were placed in areas out side of the CQC portion of the project.
If a truck or some portion of the lot is wasted it will be deducted as above, as normal, this did not change because of CQC.
If a random sample is pulled from a truck, which is later wasted or used for other than the CQC portion of the project, the sample will be considered valid. This has not changed. The lot can be redefined only if the entire production represented by that sample (prior loads, loads since, mix in the silo) is removed from project, sent to another project or placed in an area outside of the CQC portion of the project.
Q: If
the verification sublot is the fourth sublot and production is
ended before that sublot is reached, how do we verify the lot?
A: The verification sublot will be adjusted in a manner agreed to by the Engineer and the Contractor. The number can be drawn from a hat or other manner or by generating a new random number via the CPF worksheet.
Q: How
do you handle a job composed of turn lanes with a total job
tons of 2184, one fine graded mix, 70% base and 30% structural
all requiring no density.
Should it be two separate lots? A: One
lot, show lot tons as 2184 and tons requiring no density as
2184. In the Pay
Factor Calculations worksheet, enter target of 93 and sublot 1
density of 93, note in comments “Sublot 1 density is entered
only to facilitate pay factor calculations”.
Q: In
334-5.1, the spec states "The in-place density of each
layer of asphalt mix will be evaluated by use of 6 inch
diameter roadway cores randomly located by the engineer."
In 334-5.2, the spec states to obtain five cores randomly from
each sublot within 24 hours of placement as directed by the
Engineer..." If a project has a culvert that the
contractor is placing asphalt base and structural over within
the same few days and is using one 12.5 mm mix to accomplish
both, how should the Project Engineer rectify the two slightly
competing specs mentioned above? A: We
actually didn't mean to write conflicting specs, and until
about 30 seconds ago I didn't think we had one.....Since the
mix is all placed as one LOT there would not be a change in
LOTs due to a different layer being placed.
In other words, if its the same mix being placed as
base and structural, there needs to be five cores taken per
sublot. Not five
cores taken per layer. Our
bad. Q: For
a lot termination where the contractor has placed 1580 tons
for an initial production lot that ends up being terminated
due to failing roadway density (19.0 mm mix) and one core in sublot 4 is all that came up, is it consistent with the
intention of spec 334-5.2 to include just the one core in the
pay factor worksheet or should the Engineer obtain more cores
in that 80 ton sublot 4? And if more should be obtained, how
many?
A: For
a LOT termination, the spec requires five cores be taken per
sublot and since you only have one core, the contractor needs
to cut some additional cores from that 80 tons of material.
Locate them in as random a manner as possible - if you
need to, use the old random number tables based on length.
If both sides agree, you can reduce the number of cores
from five to three. That’s
not in the spec just yet but it will be in the future, and
we've taught it that way in the Refresher course.
