Clearance Transmittal C-08-020
Step 1 External Comments
Item #XXXX-XXXX Concrete Maturity Testing
Organization/ Comment Resolution
#
Person
1 BOCM/all None/Approved
District 9-0/Kevin None/Approved
2
Gnegy
District 11-0/Michael None/Approved
3 J. McCart
BOD/Nikki Krise Section I, paragraph 1, remove sentence "The Sentence left in the Description. The reason for
basis of the maturity theory is that for concrete this specification.
4 of a given mixture the same strength will
develop at a given maturity value."
Section I, paragraph 1, last sentence change verb Incorporated.
5 "will" to "does". Added "Quality" before
Acceptance.
Section II.A, paragraph 1 "remove proprietary The task force wanted specific products tested
names". on the pilot project, so proprietary names were
included. More than one was listed, so there
6
was an option. The pilot project has used the
specification, so the names will be removed.
Section II.A, bullet 3, include Fahrenheit Not incorporated, accuracy based on ASTM C
7
equivalent 1074 requirement.
Section II.B, change the order and verbs of the Incorporated.
8
first sentence.
Section II.B, change the verbs and reduce words Incorporated.
9
in the second sentence.
Section II.C.1, change measurement symbols and Incorporated measurement changes. Second
10 include metric. Remove second sentence. sentence changed to its own number.
11 Section II.C.5, include metric. Incorporated.
Section II.C.6, remove descriptive clause in first Left in for clarification.
12
sentence.
Section III. A. Unbold and reword first sentence. Incorporated.
13
Section III. A.1-3, Change "Calibration Curve" to Incorporated.
14 "Strength-Maturity Curve". Also include metric.
15 Section III.B, unbold first sentence. Incorporated.
Section III.B.2, change measurement symbols Incorporated.
16
and include metric.
Clearance Transmittal C-08-020
Step 1 External Comments
Item #XXXX-XXXX Concrete Maturity Testing
Organization/ Comment Resolution
#
Person
BOD/Nikki Krise Section III.B.5, remove "which would be" and Left in clause. Added "Curve as determined in
17
include "Calibration Section II c" Section II C(8)."
Section IV, add "Retain" and remove "will remain Left as was for clarification.
18 the property of the contractor at the completion
of this item of work."
District 12-0/Thomas Section II.A, does not list a computer, or have Added personal computer. Note: then took out
19 P. Boyle specific guidelines for devices that display because pilot project recommended not
maturity values. necessary.
Section II.B, Will need more time than six days The draft had sixty, no change.
prior to construction. If used for structures, the Second sentence in Section II.C is suppose to
bridge department should review where the address this issue. Was made into its own
sensors will be placed for critical structural number.
locations and exposure considerations.
Hopefully in the future, the standards will list the
locations for the sensors on standard structural
elements.
20
- Specification does not address the knock downs
for the water cement ratio on the design, or
changes in the dosage rates of the admixtures.
These are real life changes and should be
addressed in the specification.
Section II.C.6 -Mentions pavements and Removed structures, will work on getting
structures: Not clear if these specifications are pavements approved first.
intended to cover structures and pavements. If
this specification is intended for Structures, in
addition to pavements, then there need to be
more specification addressed for example curing,
21
loading, etc. The district does not foresee that
the maturity meter should ever eliminate the
protection of the concrete surface during cold
weather as outlined in section 1001.3(p) 4 & 5.
Clearance Transmittal C-08-020
Step 1 External Comments
Item #XXXX-XXXX Concrete Maturity Testing
Organization/ Comment Resolution
#
Person
District 12-0/Thomas Section III.B.- The verification test results data not sure how to incorporate this in to the
P. Boyle should be added to the maturity data base and specification.
the maturity model for the concrete mix and
should be continuously recomputed. Confidence
in the prediction increases as more test results
22
become available. (A method should be listed to
provide this information to the supplier and how
the supplier will keep this running average.)
Municipal Section II.A, include Fahrenheit Not incorporated, accuracy based on ASTM C
23 Services/Rich Stirling 1074 requirement.
24 Section II.C, include metric Incorporated.
25 Section III.A and B, include metric Incorporated.
FHWA/dwc Section II.A, need to address proprietary The task force wanted specific products tested
requirements. on the pilot project, so proprietary names were
included. More than one was listed, so there
26
was an option. The pilot project has used the
specification, so the names will be removed.
FHWA/ZS Section III.B.5, What is meant by "previously Was changed into a list of ranges to clarify.
established strength"? I believe the intent would
be better expressed by stating as follows: " if the
27 test results are within 10% of the
PREDICRED/ESTIMATED strength the relationship
is considered verified."
Section IV, This sentence does not Lump sum changed to incidental to pavement
unambiguously/clearly convey the intent that items.
everything required to accomplish the objectives
of this section would be considered incidental to
28
the accomplishment of the objectives and will
not be measured/quantified or paid for
separately.
PACA - Kallie L. Kline Section I, please include a definition of "critical Was changed for pilot project, based on the
29
construction operations". project comments, clarified further.
Clearance Transmittal C-08-020
Step 1 External Comments
Item #XXXX-XXXX Concrete Maturity Testing
Organization/ Comment Resolution
#
Person
PACA - Kallie L. Kline Section III B(4), the curing method should This section is verifying field concrete so the
30 indicate PTM 611 , section 11.1". reference should be PTM 611, section 11.2.
District 4-0/David K. None/Disapproved
31
Elmer
District 8-0/Douglas Disapproved/with comments.
32
Frank
Maturity Testing should be for contractors QC That is what the specification is trying to do.
33
testing only.
34 This should not be a pay item. Pay item is incidental.
Maturity Testing should not be for structures. That is why only a 501 and 516 item were sent
35 Limit use to roadways and roadway patching. out with this CT.
Pilot Project Section I, Opening to traffic based on meter or Reworded third sentence: ...is to be used "by the
Comments cylinders needs clarified. contractor to determine when to perform critical
construction operations such as saw cutting,
36
removing formwork, backfilling, moving
equipment, or breaking cylinders."
Section II, A. Equipment The brand was specified for the pilot project. If
Do we need to specify a brand? What about wireless is commercially available okay. Long
wireless? enough to establish the maturity curve and
How long is continuously logging? obtain the strength needed. Readings should be
What is wrong with reading every hour to begin closer in the beginning to establish the curve.
37 with? Accelerated patching might even need to be 15
Most construction projects have a personal minutes in the beginning after more use we will
computer now, we just need the prpoer license. know if that needs changed. Removed personal
computer and added proper software license.
Section II, B Why submit QC plan 60 days prior? Enough time to verify the plan and to turn
38
around for any changes needed.
Section II, C. 1. & 4., Recommend 11 cylinders, Originally was 17 cylinders then dropped the
but then add another cylinder for the second second sensor cylinder to reduce to 16. Will
39
sensor. word a minimum of 12 cylinders. 10 for breaks
and 2 for sensors.
Section II, C. 3. Could we establish this thru a lab No. When travel time was not taken into
not worrying about travel time? Also, for this consideration in past trials, the established curve
40
part mixing at the plant so take out reword and the verified curve to did not correlate.
taking the sample. Reworded sentence.
Clearance Transmittal C-08-020
Step 1 External Comments
Item #XXXX-XXXX Concrete Maturity Testing
Organization/ Comment Resolution
#
Person
Pilot Project Section II, C. 6. Is this a water bath for all of the Yes changed wording to claify.
41 Comments cylinders? What about the first 24 hours 60
degree to 80 degree time?
Section II, C. 7. Aren't 604 QA samples in No. PTM 604 is for testing all molded cylinders
Harrisburg? for compressive strength. The time table is no
42
longer listed in the PTM, so changed reference
to AASHTO T22-7.
Section III, A.2., include each day. Not sure about Incorporated per day. Will leave dimensions for
43
installation depth. now.
Seciton III, A.3., change structure to pavement Incorporated
44
45 Section III, B.2., add …size"is at" the… Incorporated
Section III, B.3., Why have two sensors? Two readings established the curve. Two
readings to verify the curve. The reason was to
eliminate making two cylinders for verification,
46
so both sensors would go into one. Added extra
cylinder back in to verification.
47 Seciton III, B.4., Reword to clarify. Incorporated
Section III, B.5., delete "which would be" and is Incorporated
48
c verified or not?
Section IV, What about structures? Working on getting pavements approved first
49
then will work on structures.
Clearance Transmittal C-08-020
Step 1 External Comments
Item #XXXX-XXXX Concrete Maturity Testing
Organization/ Comment Resolution
#
Person
Clearance Transmittal C-08-020
Step 1 External Comments
Item #9501-XXXX
Organization/ Comment Resolution
#
Person
BOD/Nikki Krise 501.1 after title insert "add the following" and Incorporated.
1
remove "Add:" in paragraph.
501.3(a)1 after title insert "add the following" Incorporated.
2 and remove "Add:" in paragraph.
501.3(l)2 after title insert "revise to read as Incorporated.
3
follows", remove "until" and spell out psi.
501.3(l)3 after title insert "revise to read as Incorporated.
4
follows" and spell out psi.
501.3(q) after title insert "revise to read as Incorporated.
5
follows", remove "until" and spell out psi.
District 12-0/Thomas Does not address the depth of the sensors in the Addressed in the main guideline.
6
P. Boyle pavement
Municipal Include degree symbol. Incorporated.
7 Services/Rich Stirling
FHWA/ZS 501.3(l)1 second sentence "The contractor… are The change in this paragraph was the curing time
acceptable." Acceptable to whom? frame. The unsatisfactory sentence is part of the
8 original specification and out of the scope of this
proposed specification change.
501.3(l)1 "…if unsatisfactory results are The change in this paragraph was the curing time
obtained." Unsatisfactory is a subjective term. frame. The unsatisfactory sentence is part of the
9 Unsatisfactory to whom? What constitutes original specification and out of the scope of this
"unsatisfactory" results? Where are these proposed specification change.
defined?
501.3(l)2 First sentence, How will the curing If the ambient temperature is not forecasted to
temperature be monitored when the ambient fall below 4C, the curing would be in normal
10
temperature is NOT forecasted to fall below 4C? curing conditions then 501.3(l)1 would apply.
Clearance Transmittal C-08-020
Step 1 External Comments
Item #9501-XXXX
Organization/ Comment Resolution
#
Person
FHWA/ZS 501.3(q) last sentence, It is assumed that the Yes.
correlation between maturity values and
cylinder testing (compressive strength) is
represented by the Strength Maturity Calibration
Curves discussed under 501.3(l)1. In the logical,
and conventional, sequence of events, by the
time you come to the stage represented by
11 501.3(q) you have already passed through state
501.3(l)1 where in you have "approved
/reviewed" the correlation. So, in this last
sentence of 501.3(q) are you indicating that you
could now become dissatisfied with the
correlation that you approved/reviewed under
501.3(l)1?
Pilot Project 501.3(l)1, Cure joints. The change in this paragraph was the curing time
Comments frame. The "cure joints" are part of the original
12 specification and out of the scope of this
proposed specification change.
501.3(l)2, Need to include the rest of the Incorporated.
13 paragraph to include high low thermometers.
501.3(q), curing period reference? Incorporated current specifications time frame.
And/or? Changed "and/or" to "then verified". Not
14 What will be not satisfactory? satisfactory is if the maturity value never reaches
a value on the established curve.
Clearance Transmittal C-08-020
Step 1 External Comments
Item #9516-XXXXX
Organization/ Comment Resolution
#
Person
BOD/Nikki Krise 516.1 after title insert "add the following" and Incorporated.
1
remove "Add:" in paragraph.
516.3 after title insert "add the following" and Incorporated.
2
remove "Add:" in paragraph.
516.3(q) after title insert "revise to read as Incorporated.
3
follows", include metric and spell out psi.
District 12-0/Thomas Does not address the depth of the sensors in the Addressed in main guideline.
4
P. Boyle pavement
Municipal Include metric. Incorporated.
5 Services/Rich Stirling
FHWA/ZS 516.3(q) Will these plastic-concrete samples be Include: ...plastic concrete"for compressive
used to make cylinders (for subsequent testing)? strength testing," from...
6
Is this stated somewhere?
516.1, see comment for 501.1 Comment was not included, so don't know what
7
the request is.
516.3(q) What happens if the cylinder strengths The cylinders results are the primary results.
do not agree with strengths estimated/predicted
8
by the Strength-Maturity Calibration Curve?
District 8-0/Douglas Disapproved/with comment.
9
Frank Best used in accelerated patching. Nothing to incorporate.