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<br />42'11
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<br />liquid asphalt prior to incorporating the matedal into
<br />the wQrk. The certifkation shalt include: materia'
<br />identification, quantity. represented, and -certified' test
<br />results performed by the manu'facturer Or.' other
<br />laboratory covering alt of the test requirements of the
<br />spectfications. The accuracy of all laboratory analyses
<br />shall be guaranteed by the contractor.
<br />
<br />Prior to incorporation of the material in the work, a
<br />1.quart sample for each 10,OOO-gallon quantity, or
<br />fraction thereof, will be obtained by the Government
<br />at the jobsite for testing purposes. Although use of the
<br />asphaltic' materials will be permitted upon presentation
<br />of the properly certified analysis, such usage shall be at
<br />the risk of SUbsequent rejection should .the
<br />Government's test results indicate' failure of', the
<br />materiats to conform with the specifications
<br />requirements. The costs of any delay or damage due to
<br />failure of the asphaltic materials to comply with the
<br />specifications 'requirements shal.l be, borne by the
<br />contractor.
<br />
<br />The GoverClment reserve's the right to test any <?r all
<br />materials acceptable on certification when, in the
<br />opinion of the Government such tests are necessary.
<br />
<br />268. WEIGHTS OF ROIl.OWIl.Y
<br />MIl.TERIALS
<br />
<br />Materials for roadway surfacing which will be paid for'~'-
<br />by the ton shall be weighed on platform scales
<br />furnished at the expense of and by the contractor,
<br />unless the materials are shipped by rail or computed by
<br />volumetric measurement as specified below.
<br />
<br />Scales shall be approved by the contracting ~ffjcer anN
<br />shall be tes.ted and sealed, at _ the. ~xp.e.nse .of the
<br />contractor, as oiten as the con.t(acti'rig"office.r' may
<br />deem necessary to insure their acc'l,Iracy. A weigher,
<br />appointed and compensated by the Government,' shall
<br />weigh alt materials required to be weighed as herein
<br />provided. If the materials are shipped by rail, the car
<br />weights will be accepted: Provided, That actual weights
<br />of the materials only wiH be paid for and not minimum
<br />car weights used for assessing freight tari.ff: Provided
<br />further, That car weights will not be acceptable for
<br />materials passed through mixing plants. Weight slips
<br />. .prepared by certified public weight-masters stationed
<br />at public scales will be accepted.
<br />
<br />When the water content of any minerat aggregate for
<br />surfacing exceeds 4 percent, by weight, of the ovendry
<br />weight of the material, as determined by the
<br />contracting officer, the weight of the material to be
<br />paid for shall be. determined by deducting from the.
<br />weight of the material delivered to the jOb the weight
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<br />SPECIFIC/'\TlOtl!S _NO. DC-6 ._
<br />(SUPPLEMENTAL NOTICE~j3)
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<br />of. water in the ~ater..at in .excess o~ 4.perc~~E-
<br />ovendfY: weight ~hhe.1-oa1erlal. .
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<br />Volumetric meaS"UI:ements of liquid 'aspha~L-a
<br />temperature wilt. be reduced 'to the volume the.m
<br />would . o'ccupy at. 600 F before conve'rti.ra
<br />volumetric measurements to tons. The followin'-
<br />will be used to CORvert the volumes from ga
<br />tons, and the methods specified in "AS
<br />Petroleum Measurement Tables" (Designatit>'" -J'. ':.(
<br />1250) of' the American Society tor Testin~il'l'
<br />Mater.als will be used to convert the volume ,~~y
<br />temperature to the volume at 600 F. ~~r'
<br />
<br />Grade of
<br />liquid asphalt
<br />
<br />Gallons per t<;>;.......
<br />at 600 F l" .::
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<br />253,i~I'
<br />235, ,';t:::!
<br />
<br />70.
<br />Asphalt cement
<br />85-100
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<br />
<br />269. Il.GGREGATES FOR BITUMINO.US ._.....
<br />ROAOWA V' :SURFA:CING:~"
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<br />All aggregate material 'for the roadway surfacin~'fti,1I
<br />be furnished ,by' ,the contractor, Samples indicai~~frat
<br />materiat'of:satisfattory quality for the produC~~,W,;9f
<br />subbase .cour~e,_base course} and mi..nerSI aggre:I..' '..'i(O.. r
<br />bituminous surfacing, may .be obtained at,". ~~"Ps
<br />Borrow Area, ~ocated as shown on the drawirf . ne
<br />contractor may obtain mat-erial' "fro~;- e
<br />above.described locations without charge. T.tie.1~.. .. -rat
<br />the- Government is hereby. designating depo~i{ - 'om
<br />which materials may be obtained shqll.' ,:nRi.~r:~ be
<br />construed as constituting the approval of all m~~t!ls
<br />taken from the' deposits, and the contracto~ lim'1?e
<br />held responsible for the spec.ified quality of. ~I~~,cb
<br />materials used in the work, Should the contractofl~re'Ct
<br />to obtain material from Government approved .s;' eli'<?e.s
<br />other than those described above, he. shall .m " 'e:'..all
<br />necessary arrangements with the owners and'sha ,pay
<br />aU costs connected therewith. ~: '},.'
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<br />The source of supply of each ~f the 'materials furQi~hed
<br />by the contractor shall be subject. to approval ~~fo're
<br />the delivery is started. Only approved m3j~,r:i~ls
<br />conforming to the requirement!; of these speci-uca)i'ons '~
<br />shaH be used in the work. All materials proPos~,cf"for
<br />use may be inspected or tested at any time duriq~Jj.U~ir
<br />preparation and use. .If, after trial, it is fOUt.l,5,~~at
<br />sources of supply wh,ch have been approved ~}riOt
<br />furnish a uniform product, or if the product frol1P~ny
<br />source proves unacceptable at any time, the coq~~~tor....
<br />shall furnish app~~ved .~aterial from other a~~~~v~d
<br />soOrces. No matenal' which, after approval., has:.~ 'al'}V
<br />way become unfit for use shall be used in the vc,drk.
<br />
<br />257
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