2013-02-20_REPORT - M1980244

• Permit No: M1980244
• IBM Index Class Name: REPORT
• Doc Date: 2/20/2013
• Doc Name: Response to Concrete Spec. and CDOT Inquiry.
• From: CC&V
• To: DRMS
• Email Name: TC1
• Media Type: D
• Archive: No

CC &V PROJECT NO. SC -07 -002
2
REVISION OF SECTIONS 105 AND 106
CONFORMITY TO THE CONTRACT OF HOT MIX ASPHALT
(LESS THAN 5000 TONS)
If the test result is within the tolerance limits then PF = 1.00
If the test result is above the maximum specified limit, then
PF = 1.00 — [0.25(T - T
If the test result is below the minimum specified limit, then
PF = 1.00 — [0.25(T - T
Where: PF = pay factor.
V = V factor from Table 105 -2.
T = the individual test result.
T = upper specification limit.
T = lower specification limit.
The calculated PF will be used to determine the I /DP for the process.
February 3, 2011
(b) Determining Quality Level. Each process with three or more test results will be evaluated for a quality level
(QL) in accordance with Colorado Procedure 71.
(c) Gradation Element. Each specified sieve, with the exception of 100 percent passing sieves, will be evaluated
for QL separately. The lowest calculated QL for a sieve will be designated as the QL for gradation element
for the process.
(d) Joint Density Element. Joint Density will be tested according to subsection 401.17.
(e) Process Pay Factor. Using the calculated QL for the process, compute PF as follows: The final number of
random samples (Pn) in each process will determine the final pay factor. . As test values are accumulated
for each process, Pn will change accordingly. When the process has been completed, the number of random
samples it contains will determine the computation of PF, based on Table 105 -3 and formula (1) below.
When Pn is from 3 to 9, or greater than 200, PF will be computed using the formulas designated in Table 105-
3. Where Pn is equal to or greater than 10 and less than 201, PF will be computed by formula (1):
(PF, + PF r (PF + PF (PF1 + PF (Pn — Pn
(1) PF = +
2 L x
2 2 (Pn —Pn
Where, when referring to Table 105 -3:
PF PF determined at the next lowest Pn formula using process QL
PF PF determined using the Pn formula shown for the process QL
PF PF determined at the next highest Pn formula using process QL
Pn the lowest Pn in the spread of values listed for the process Pn formula
Pn the lowest Pn in the spread of values listed for the next highest Pn formula
Pn the actual number of test values in the process
When evaluating the item of Furnish Hot mix asphalt, the PF for the element of In -Place Density shall be 1.0.