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RESOLUTION
WHEREAS, on or about May 1 , 1968, Weld County, Colorado,
did adopt a schedule of county road specifications relating to construction
of new county roads in Weld County by contractors and /or subdividers,
and
WHEREAS, it has come to the attention of the Board of County
Commissioners, Weld County, Colorado, that said schedule of county
road construction did not provide for asphalt paving of roads, and
WHEREAS, the Board is of the opinion that there is a need to
incorporate within the present county road specifications and requirements
the item of asphalt paving where required.
NOW, THEREFORE, BE IT RESOLVED, that from date hereof,
the item of asphalt paving be added to and be a part of the present Weld
County road specifications and as more particularly set out and shown on
attached schedule "ASPHALT PAVING" and made a part hereof by reference.
BE IT FURTHER. RESOLVED that the schedule entitled "ASPHALT
PAVING" attached herewith and made a part hereof by reference, be and
it hereby is, adopted and shalt be incorporated within the present existing
county road specifications and requirements of Weld County, Colorado.
The above and foregoing Resolution was, on motion duly made and
seconded, adopted by the following vote:
AYES: �ra'
,70
oard of County ommissioners
ATTEST: Weld County, Colorado
Clerk of the Board
P , e a J� 04 c° ;
APROVED AS TO F .M:
atal
Attorney
Dated August 12 , 1970.
s
� Ca3 g ' 1 700411
Asphalt Paving
Paving Asphalt: This item shall conform to the Standard Specifications of the
Colorado Department of Highways for Item No. 29, Grade 85-100 Penetration, unless
otherwise specified by the engineer.
Prime Coat: This item shall conform to the Standard Specifications of the Colorado
Department of Highways for Item 30 and shall be a medium curing asphlt of a grade
specified by the engineer and shall be applied at a rate specified by the engineer.
The use of other asphaltic materials will be permitted as directed by the engineer.
Seal Coat: This item shall conform to the Standard Specifications of the Colorado
Department of Highways for Item 30 and shall be a rapid curing asphalt of a grade
specified by the engineer. The use of other asphaltic materials will be permitted
as directed by the engineer. The quantities of the liquid asphalt and the cover
aggregate that are to be used shall be determined by the engineer.
Cover Aggregates: Stripping resistance of the cover aggregate shall conform to
Colorado State Highway Specification Item 31.2.3.3. Construction methods shall
conform to State Highway Specification Item 31.3.21.
Gradation
Sieve Size Per Cent Passing
Type I Type II*
5/8" 100% 100%
1/2" 95-100% 100%
3/8" 50-70% 90-100%
No. 3 10-30% 45-70%
No. 4 0-10% 0-20%
No• 8 0-3% 0-4%
No. 200 0-2% 0-2%
Fractured Face (%by weight) + 4 60% Min. No Req.
* When specified, Type II cover aggregate may be used.
Abrasion: Course aggregate shall show a loss of not more than forty-five per cent(45%)
when tested in accordance with A.A.S.H.0. Standard Method of Test fcr Abrasion of
Course Aggregate by use of the Los Angeles Machine, Designation: T-96 (A.S.T.M. C131)
Plant-Mixed Asphalt Surfacing: This item shall conform and all work shall be done
in accordance with the Standard Specifications of the Colorado Department of Highways
for Item 32, and the mineral aggregate shall meet the following requirements:
Gradation
Sieve Size Per Cent Passing
3/4" 100%
No. 4 30 - 60%
No. 10 25 - 50%
No. 40 18 - 30%
No. 200 5 - 12%
Liquid Limit 25 Max.
Plasticity Index 6 Max.
Wet/Dry Ratio 75 Min.
"ractured Face (% by weight) +4 50% Min.
Abrasion: Course aggregate shall show a loss of not more than forty-five per cent
(45%) when tested in accordance with A.A.S.H.O. Standard Method Test for Abrasion
of Course Aggregate by use of the Los Angeles Machine, Designation: T-96 (A.S.T.M.
C131).
The asphalts, cements and liquid asphalt shall conform with Items 29 and 30
respectively of the Colorado Highway Department Standard Specifications.
Rolling shall conform to Colorado State Highway Specifications Item 32.3.5 except
that two rollers, one steel and one rubber-tired, self propelled non-wobbly wheel,
shall be required at all times. Additional rollers will be required when placing
over 75 tons per hour at the rate of one additional roller per 50 tons per hour.
The contractor will be required to obtain a minimum of 95% of laboratory density
determined from specimens made in accordance with the Hveem or Marshall Method
of Test. Surface smoothness shall conform to Item 32.3.5.2. of State Highway
Standard Specifications.
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