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<br /> maintained,ar crated that bituminous material at even heat may be applied percent or less.The aggregate shall then be spread smoothly a inifornily
<br /> uniformly on variable widths of surface up to fourteen (14) feet at readily over half the road or other convenient width of the surf:Ece . y for the
<br /> determined and controlled rates from five one-hundredths(0.05)to two(2.0) application of bituminous material,except that when a travciling mixing plant
<br /> gallons per square yard, with uniform pressure, and with an allowable is used the aggregate shall be formed into a uniform cross section.
<br /> In lieu of aerating and drying th4 aggregate, the Contractor may use an �
<br /> variation from any specified talc not to exceed two one-hundredths (G.02) $ y gs
<br /> gallon per square yard. Distributor equipment shall include a tachometer, approved additive. The additive shall permit suitable coaling of the wct
<br /> pressure gauges,accurate volume measuring devices or a calibrated lank,and aggregate and shall prevent the bituminous coating from stripping in the
<br /> a thermometer for measuring temperatures of tank contents.Distributors shall presence of water.
<br /> be cquippcd with a pourer unit for the pump, and full circulation spray bars 404,03.08 Application of Bituminous Material. The bituminous mate-
<br /> rial shall be uniformly distributed in successive application, in such amounts
<br /> 404.03.03 Mixing 'Plants. Travelling or stationary mixing plants or and at such intervals as directed.The temperature of the;bituminous matcrial
<br /> other equipment of proven performance may be used by the Contractor in lieu shall conform to the applicable requirements of subsection 406.03.04,
<br /> of the specified equipment if approved. Travelling mixing plant shall have "Application of Bituminous Material." The mixing equipment shall follow
<br /> positive controls for applying asphalt. immediately behind the distributor after each application of bituminous mate
<br /> ria] to partially mix the aggregate and the bituminous material. No more
<br /> 404.03.04 Rollers.' Rollers used shall conform to the requirements of bituminous matcrial shall be applied per day than can be mixcd with the
<br /> subsection 401.03.04, "Rollers.- aggregate on the same day it is applied.
<br /> Liquid asphalt shall not be applied when the moisture content of the
<br /> 404.03.05 Weather Limltations. The mixing,spreading, and compact- aggregate exceeds two (2) percent by weight of the (Iry aggregate as dacr-
<br /> ing of roadmix bituminous pavement shall be carried on only when the surface mined by Test Method No. Nev. T1 12C.
<br /> on which the matcrial is to be placed is dry and when the atmospheric 404.03.09 Mixing. The materials may be mixcd upon the roadbed, or
<br /> a
<br /> temperature is above fifty (50) degrees Fahrenheit, and has not been below g• y P
<br /> forty (40) degrees Fahrer:heit during the preceding twenty-four(24)hours. upon some other approved arca off the roadbed, by roadmixing methtxls, or
<br /> the matcrial may be mixed at a central mixing plant by plantmixing methods
<br /> 404.03.06 Preparation of Existing Surface. Before spreading materials as specified below, whichever the Contractor elects,
<br /> for roadmixing,the surface of the base or road surface on which the roadmix (a) Roadmixing Methods. Prior to applying the bituminous matcrial the
<br /> is to be placed shall be conditioned as specified in subsection 401,03.06, prepared aggregate shali be spread Smoothly and uniformly over one-half(112)
<br /> "Preparation of Existing Surface:' f the mixing area or some other convenient width. The first application of
<br /> After a prime coat!is applied, it shall be left undisturbed not less than bituminous material shall then be applied and partially mixed with the ;
<br /> twenty-four (24) hours. The Contractor shall maintain the primed surface aggregate. The remaining, applications of bituminous material with a partial
<br /> until the roadmix matcrial has been placed.This maintenance shall include the mixing after each applications shall follow in like manner. After the East
<br /> spreading of sand or other material, if necessary to prevent adherence of the application of bituminous material and partial mixing, the entire mass of
<br /> prime coat to the tires of vehicles using the ptimed surface,and patching any bituminous matcrial and aggregate shall be windrowed on the mixing surface
<br /> breaks in the primed surface with additional bituminous material.Any arca of and then thoroughly mixer] and combined by the mixing units specified, by
<br /> primed surface that has become damaged shall be repaired before the roadmix blading the mix from side to side of the mixing surface,or by a manipulation
<br /> material is placed. producing equivalent results, until all particles are coated with bituminous
<br /> material and the whole mass has uniform color and the mixture is free from
<br /> 404.03.07 Placing Aggregates, Minera'. aggregate shall be deposited � spots containing an excess or deficiency of bituminous material, balls, or
<br /> upon the prepared subgrade,or mixing area,by the use of spreader boxes,or uncoated particles. During the mixing operations,care shalt be taken to avoid
<br /> from the vehicles equipped or supplemented with suitable spreading device*. cutting into the underlying course or contaminating the mixture with earth or
<br /> The mineral aggregate shall contain sufficient material to construct the other extraneous matter. When so directed by the Enginecr. the mixing,
<br /> roadmix surfacing as planned, including sufficient matcrial for surfacing process shall be confined to part of the width or arca of the madhed so as to
<br /> special features off the travelled way. The aggregate shall not be mixed with allow a convenient passage for traffic.
<br /> earth or other deleterious matter. Prior to spreading and compacting, should the mixture show an cxccsti (Ir
<br /> if the moisture content of the aggregate is more than two (2) percent by dcftciency of bituminous matcrial, or an uneven distribution thereof, the
<br /> weight of the dry weight of the aggregate, except when the biluminou'. condition shall be corrected by adding mineral aggregate or bitutninnus
<br /> matcrial is emulsified asphalt,the aggregate shall be turned by blades or disc matcrial, as the case may be, and then remixing to produce a satisfactory
<br /> harrows or otherwise aerated until the moisture content is reduced to two l2t
<br /> ( 216 ] ( 217 ]
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