# PART VII -- MISCELLANEOUS

### **ITEM P‑602  BITUMINOUS PRIME COAT**

DESCRIPTION

**602-1.1**  This item shall consist of an application of bituminous 
material on the prepared base course in accordance with these
specifications and in reasonably close conformity to the lines shown on
the plans.

MATERIALS

**602-2.1 BITUMINOUS MATERIAL.**  The types, grades, controlling
specifications, and application temperatures for the
bituminous materials are given in Table 1.  The Engineer shall designate
the specific material to be used.

**TABLE 1. BITUMINOUS MATERIAL**

  -------------------- ------------------- --------------- ---------------
                                           Application     
                                           Temperatures    
                                           \\1\\           

  Type and Grade       Specification       Deg. F          Deg. C

                                                           

  Emulsified Asphalt                                       

  SS‑1, SS‑1h          ASTM D 977          70‑160          20‑70

  MS‑2, HFMS‑1         ASTM D 977          70‑160          20‑70

  CSS‑1, CSS‑1h        ASTM D 2397         70‑160          20‑70

  CMS‑2                ASTM D 2397         70‑160          20‑70

                                                           

  Cutback Asphalt                                          

  RC‑30                ASTM D 2028         80+             30+

  RC‑70                ASTM D 2028         120+            50+

  RC‑250               ASTM D 2028         165+            75+
  -------------------- ------------------- --------------- ---------------

\\1\\  The maximum temperature for cutback asphalt shall be that at
which fogging occurs.

CONSTRUCTION METHODS

**602-3.1 WEATHER LIMITATIONS.**  The prime coat shall be applied only
when the existing surface is dry or contains sufficient moisture to get
uniform distribution of the bituminous material, when the atmospheric
temperature is above 60°F (15°C), and when the weather is not foggy or
rainy.  The temperature requirements may be waived, but only when so
directed by the Engineer.

**602-3.2 EQUIPMENT.**  The equipment used by the Contractor shall
include a self‑powered pressure bituminous material distributor and
equipment for heating bituminous material.

The distributor shall be designed, equipped, maintained, and operated so
that bituminous material at even heat may be applied uniformly on
variable widths of surface at the specified rate.  The allowable
variation from the specified rate shall not exceed 10 percent. 
Distributor equipment shall include a tachometer, pressure gages,
volume‑measuring devices or a calibrated tank, and a thermometer for
measuring temperatures of tank contents.  The distributor shall be
self‑powered and shall be equipped with a power unit for the pump and
full circulation spray bars adjustable laterally and vertically.

If the distributor is not equipped with an operable quick shut off
valve, the prime operations shall be started and stopped on building
power. The Contractor shall remove blotting sand prior to asphalt
concrete lay down operations at no additional expense to the owner.

A power broom and/or blower shall be provided for any required cleaning
of the surface to be treated.

**602-3.3 APPLICATION OF BITUMINOUS MATERIAL.**  Immediately
before applying the prime coat, the full width of the surface to be
primed shall be swept with a power broom to remove all loose dirt and
other objectionable material.

The bituminous material including solvent shall be uniformly applied
with a bituminous distributor at the rate of 0.25 to 0.50 gallons per
square yard (1.20 to 2.40 liters per square meter) depending on the base
course surface texture.  The type of bituminous material and application
rate shall be approved by the Engineer prior to application.

Following the application, the primed surface shall be allowed to dry
not less than 48 hours without being disturbed or for such additional
time as may be necessary to permit the drying out of the prime coat
until it will not be picked up by traffic or equipment.  This period
shall be determined by the Engineer.  The surface shall then be
maintained by the Contractor until the surfacing has been placed. 
Suitable precautions shall be taken by the Contractor to protect the
primed surface against damage during this interval, including supplying
and spreading any sand necessary to blot up excess bituminous material.

**602-3.4 BITUMINOUS MATERIAL CONTRACTOR\'S RESPONSIBILITY.**  Samples
of the bituminous materials that the Contractor proposes to use,
together with a statement as to their source and character, must be
submitted and approved before use of such material begins.  The
Contractor shall require the manufacturer or producer of the bituminous
materials to furnish material subject to this and all other pertinent
requirements of the contract.  Only satisfactory materials, so
demonstrated by service tests, shall be acceptable.

The Contractor shall furnish vendor\'s certified test reports for
each carload, or equivalent, of bituminous material shipped to the
project.  The test reports shall contain all the data required by the
applicable specification. If the Contractor applies the prime material
prior to receipt of the tests reports, payment for the material shall be
withheld until they are received. If the material does not pass the
specifications it shall be replaced at the contractor\'s expense. The
report shall be delivered to the Engineer before permission is granted
for use of the material.  The furnishing of the vendor\'s certified test
report for the bituminous material shall not be interpreted as basis for
final acceptance.  All such test reports shall be subject to
verification by testing samples of materials received for use on the
project.

**602-3.5 FREIGHT AND WEIGH BILLS.**  Before the final estimate is
allowed, the Contractor shall file with the Engineer receipted bills
when railroad shipments are made, and certified weigh bills when
materials are received in any other manner, of the bituminous materials
actually used in the construction covered by the contract. The
Contractor shall not remove bituminous material from the tank car or
storage tank until the initial outage and temperature measurements have
been taken by the Engineer, nor shall the car or tank be released until
the final outage has been taken by the Engineer.

Copies of freight bills and weigh bills shall be furnished to the
Engineer during the progress of the work.

METHOD OF MEASUREMENT

**602-4.1**  The bituminous material for prime coat shall be measured by
the **\[gallon (liter)\]\[ton(kg)\]** .  Volume shall be corrected to
the volume at 60°F (15°C) in accordance with ASTM D 1250 for cutback
asphalt, and Table IV‑3 of The Asphalt Institute\'s Manual MS‑6 for
emulsified asphalt.

BASIS OF PAYMENT

**602-5.1**  Payment shall be made at the contract unit price per
**\[gallon (liter)\]\[ton (kg)\]** for bituminous prime coat.  This
price shall be full compensation for furnishing all materials and for
all preparation, delivering, and applying the materials, and for all
labor, equipment, tools, and incidentals necessary to complete this
item.

Payment will be made under:

Item P‑602‑5.1 Bituminous Prime Coat---per **\[gallon (liter)\]\[ton
(kg)\]**

MATERIAL REQUIREMENTS

ASTM D 977 Emulsified Asphalt

ASTM D 2028 Cutback Asphalt (Rapid Curing Type)

ASTM D 2397 Cationic Emulsified Asphalt

TESTING REQUIREMENTS

ASTM D 1250 Petroleum Measurement Tables

Asphalt Institute Asphalt Pocketbook of Useful Information
(Temperature-Volume Corrections

Manual MS‑6 for Emulsified Asphalts)

Table IV‑3

**END OF ITEM P-602**

**Intentionally Left Blank**