ITEM 702 – BITUMINOUS MATERIALS
702.1
Asphalt Cements
Asphalt
cement shall conform to the requirements of AASHTO M 226.
702.2
Liquid Asphalts
Liquid
asphalt shall conform to the requirements of the following specifications:
Rapid
Curing Liquid Asphalts - AASHTO M 81
Medium
Curing Liquid Asphalts - AASHTO M 82
702.3
Emulsified Asphalts
Emulsified
asphalts shall conform to the requirements of the following specifications:
Emulsified
Asphalt (Anionic) - AASHTO M 140 (ASTM D 977)
Emulsified
Asphalt (Cationic) - AASHTO M 208
702.4
Acceptance Procedures for Bituminous Materials
702.4.1
General
Bituminous
materials will be accepted at the source of shipment subject to the following
conditions:
a.
The supplier shall conduct laboratory tests of all materials intended for
shipment to the Government and certify that the materials meet the Contract
Specifications.
b.
Before loading, the producer shall examine the shipping container, remove all
remnants of previous cargoes which night contaminate the material to be loaded
and certify that it was clean and free of contaminating material and loaded.
c.
The Contractor shall furnish with each shipment two copies of the delivery
ticket. The delivery tickets shall contain the following information:
Consignees
________________ Destination _________________
Project
Number _____________ Date ______________________
Grade
____________________ Loading Temp. ______________
Net Liters
__________________ Specific Gravity ______________
At 15.50C
Net
Weight _______________________________________________
Identification
No. (Truck, Car, Tank, etc.) ________________________
d.
The Contractor or the supplier as his agent, shall deliver to the Engineer or
his representative a certification signed by an authorized representative of
the supplier to cover the quality and quantity of material and the condition of
container for each shipment. The certification shall be essentially in the
following form and may be stamped, written or printed on the delivery tickets.
“This
is to certify that this shipment of _______________ (tonnes/liters)
or ______________ of asphalt meets all Contract Specification requirements
of the DPWH, and the shipping container was clean and free from contaminating
material when loaded.
Producer
________________________
Signed
__________________________
Failure
to sign the certification will be a cause to withhold use of the material until
it can be sampled, tested and approved.
702.4.2
Quality Control Reviews
Quality
control reviews will be conducted by the Government, or an authorized
representative at the point of production, at frequencies prescribed by the
DPWH, to determine the reliability of the producer’s certifications.
If
this review indicates that the certifications are not reliable, the acceptance
of bituminous materials by certification will be discontinued and the contents
of each shipping container will be sampled at point of delivery, tested and
accepted prior to incorporation into the work. This procedure will be followed
until the engineering determination is made that the supplier’s quality control
and testing procedures are such that material meeting Contract Specifications
is being consistently produced.
702.4.3
Alternate Acceptance Procedures for Asphalt Materials
Where
required by the Special Provisions, the following alternate acceptance plan for
asphalt material will apply in lieu of (a) and (b) above. The Contractor shall
provide deliver tickets and certifications as set out in (a), above.
Acceptance
samples of bituminous materials shall be obtained in accordance with AASHTO T
40, Sampling Bituminous Materials, at the applicable point of acceptance as
defined herein:
a.
Bituminous materials used in direct application on the road. Acceptance samples
shall be obtained under the supervision of the Engineer from the conveyances
containing the bituminous material at the point of delivery. Single samples
shall be taken of each separate tank load of bituminous material delivered, at
the time of discharge, into distributors or other conveyances on the project.
b.
Bituminous materials initially discharged into storage tanks on the project. Acceptance
samples shall be obtained from the line between the storage tank and the
distributor of the bituminous mixing plant after each delivery. A single
acceptance sample shall be taken after sufficient period of circulation of such
bituminous material has taken place to insure samples representative of the
total materials then in the storage tank.
As
soon after sampling as practicable, the acceptance sample shall be delivered by
the Engineer to the nearest authorized laboratory for tests to determine
compliance.
702.4.4
Requirements for Bituminous Materials containing Anti-stripping Additives
a.
All the foregoing requirements of Item 702 shall apply for the type of
bituminous material involved.
b.
Additionally, the Contractor or the supplier as his agent, shall furnish the
Engineer or his representative along with and the time of delivery of the initial
shipment of fortified bituminous material to the project, and thereafter with
the subsequent shipments when ordered by the Engineer, 1 liter (1quart) sealed
sample of the bituminous material taken at the time of loading at the refinery
and prior to introduction of the additive, along with a separate 0.5 liter
sample of the anti-stripping additive involved.
702.5
Application Temperatures
Bituminous
materials for the several application indicated in the Specifications shall be
applied within the temperature ranges indicated in Table 702.1.
Table 702.1 – Application Temperatures
Type and Grade Of Material
|
Application Spray (Min./Max.)
|
Temperature Range (0C) Mix (Min./Max.)
|
RT
1-2-2
RT
4-5-6
RT
7-8-9
RT
10-11-12
RTCB
5-6 . . . . 30
MC
. . . . . . . . . 30
RC-MC
. . . . . . 70
RC-MC
. . . . . . 250
RC-MC
. . . . . . 800
RC-MC
. . . . . . 3000
All
Emulsions Asphalt Cement (All Grades)
|
15.5 – 54
29 – 65.5
79 – 121
15.5 – 48.9
21 – 62.8
40.5 – 85
60 – 107
79 – 129
106.7 – 143
10 – 71
204 Max.
|
15.5 – 54
29 – 65.5
65.5 – 107
79 – 121
15.5 – 48.9
15.5 – 40.5
32 – 68
51.7 – 93
71 – 107
93 – 126.7
10 – 71
As required to achieve viscosity of 75 – 150
seconds to achieve a Kinematic Viscosity of150-300 mm2 /s
(150-300) centi-stokes
|
Table
702.1 shall apply unless temperatures ranges applicable to specific lots of
material delivered to the job are supplied by the producer.
702.6
Material for Damp proofing and Waterproofing Concrete and Masonry Surfaces
Material
shall conform to the requirements of the following specifications:
a.
Primer for use with asphalt AASHTO
M 116
b.
Primer for use with tar AASHTO
M 121(ASTM D 43)
Or
It
may be a liquid water-gas tar conforming to the following requirements:
Specific
gravity, 250/250C 1.030
– 1.100
Specific
viscosity at 400C (Engler), not more than 3.0
Total
distillate, mass percent 3000, not more than 50.0
Bitumen
(soluble in carbon disulphide), not less than 98.0
percent
Water
not more than 2.0
percent
c. Tar for mop or
seal coats: ASSHTO
M 118,
Coal tar pitch
(heated to free Type
B (ASTM D450)
flowing
but not to exceed 1490C
Or
Tar applied at about 270C AASHTO
M 52,
RTCB
5 or 6
Rubberized
tar (heated to free ASTM
D 2993
flowing
but not to exceed 1210C
d.
Asphalt for mop coat AASHTO
M 115
e. Waterproofing fabric ASSHTO
M 117
(ASTM
D 1668)
Fabric
shall be waterproofed with tar or asphalt in agreement with the material
specified for prime and mop coats.
f.
Mortar materials shall conform to Section 705.5 except that the mortar shall be
uniformly mixed to spreading consistency in the proportion of 1 part Portland
Cement to 3 parts fine aggregate.
g. Asphalt plank AASHTO
M 46
(ASTM
D 517)
Unless
otherwise shown on the plans, planks shall be 30 mm thick and may be from 150
to 300 mm in width but all pieces for one structure shall be of the same width
except such “closers” as may be necessary. The lengths shall be such as to
permit the laying of the planks to the best advantage on the surface to be
covered but shall not be less than 0.9 nor more than 2.5 m.
h.
Asphalt roll roofing ASTM
D 224,
29.55
kg grade
702.7
Membrane Material for Waterproofing Bridge Decks
Bridge
deck waterproofing membrane shall be mesh-reinforced self-sealing rubberized
asphalt preformed membrane and shall have the following properties:
Thickness 1.65 mm ASTM
E 96
Permeance-Perms 57.213 x 10-11 Method B
Kg/Pa.s.m2 (0.10)
(grains/sq.ft./hr./in.Hg)
Tensile strength 344.5
kPa ASTM D 882 modified
for
25.4
mm opening
Puncture
resistance (mesh) 90.8 kg ASTM E 154
Pliability – 6.35 mm No
cracks in ASTM D 146
mandrel 1800 rubberized
asphalt
bend
at -8.30C
Primer
and mastic shall be as recommended by the manufacturer and shall be compatible
with the membrane.
702.8
Tars
Tars
shall conform to the requirements of AASHTO M 52.
702.9
Dust Oils
Dust
oils and clarified dust oil shall conform to the following requirements:
General
Requirements
|
ASTM
METHOD
|
Dust Oil
|
Clarified
Dust Oil
|
||
Light
|
Medium
|
Heavy
|
|||
Flash
Point, 0C (Open tag.), min.
Viscosity
at 380C Kinematic, CS
Water,
% maximum
Asphaltenes
%
Saturates
%minimum
|
D 1310
D 2170
D 95
*D2006
*D2006
|
51.6
40-70
2.0
3.0-6.0
25
|
51.6
90-135
2.0
4.0-7.0
25
|
51.6
145-200
2.0
5.0-8.0
25
|
93.3
20 - 100
2.0
0 - 5.0
10
|
Distillation
|
|||||
Total
Distillate to 2880C Max. %
|
**D402
|
35
|
30
|
30
|
5
|
Test on residue from Distillation to 2880C
|
|||||
Viscosity
at 100oT, Kinematic, CS
|
D 2170
|
75-250
|
200 -630
|
540 -1500
|
20 - 150
|
Solubility
in Trichloroethylene, % Min.
|
***2042
|
97.0
|
97.0
|
97.0
|
97.0
|
* As
modified in procedure as “Test Method for Determination of Asphaltene and
Saturate Content of Dust Oils” by Materials Testing Laboratory, Region I, USDA
Forest Service, Missoula, MT dated November 1970. Copies of the procedure are
available from the Regional Materials Engineer, Region I, USDA Forest Service,
Missoula, MT 598011.
**
Except that the residue remaining after a temperature of 2880C
(instead of 3600C) shall be used for further testing. As modified in
procedure identified as “Standard Method of Test for Distillation of Forest
Service Dust Oil” dated July1972. Copies of the procedure are available from
the Regional Materials Engineer, Region I USDA Forest Service, Missoula, MT,
59801.
***
Trichloroethylene shall be used as a solvent instead of carbon disulphide.
Post a Comment