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NASJRB WILLOW GROVE CT0 0074 2960074 Compaction: Apply [75 blows of the hammer to each flat face of 1 and [- 11 [and 50 blows resent the average of at least four PART 3 C. Cooling of Specimen: allow the specimen to cool in air to the same re approximately as that of the water, 77 degrees F, to be u gravity determination. EXECUTION 3.1 PREPARATION wpFi.&*+z pwv LJFm = w qo\. 3.1.1 Mixing Produce bituminous mixture in a plant as specified herein. 3.1.2 Preparation of Mineral Aggregates Store different size aggregate in separate stockpiles so that different sizes will not mix. Stockpile different-sized aggregates in uniform layers by use of a clam shell or other approved method so as to prevent segregation. The use of bulldozers in stockpiling of aggregate or in feeding aggregate to the dryer is prohibited. Feed aggregates into the cold elevator by means of separate mechanical feeders so that aggregates are graded within requirements of the job-mix formulas and tolerances specified. Regulate rates of feed of the aggregates so that moisture content and temperature of aggregates are within tolerances specified herein. Dry and heat aggregates to the temperature necessary to achieve the mixture determined by the job mix formula within the job tolerance specified. Provide adequate dry storage for mineral filler. 3.1.3 Preparation of Bituminous Mixture Accurately weigh aggregates and dry mineral filler and convey into the mixer in the proportionate amounts of each aggregate size required to meet the job-mix formula. Introduce required amount of asphalt into the mixer at a temperature not to exceed 325 degrees F so that the asphalt can mix uniformly with the aggregate. In batch mixing, after aggregates and mineral filler have been introduced into the mixer and mixed for not less than 15 seconds, add asphalt by spraying or other approved methods and continue mixing for a period of not less than 20 seconds, or as long as required to obtain a homogeneous mixture. The time required to add or spray asphalt into the mixer will not be added to the total wet-mixing time provided the operation does not exceed 10 seconds and a homogeneous mixture is obtained. When a continuous mixer is employed, mixing time shall be more than 35 seconds to obtain a homogeneous mixture. Additional mixing time, when required, will be as directed by the Contracting Officer. Temperature of the mixture at the time of discharge shall not exceed [ -1 degrees F. Temperature of the aggregate and mineral filler in the mixer shall not exceed 350 degrees F when asphalt is added. When mixture is prepared in a twin-pugmill mixer, volume of the aggregates, mineral filler, SECTION 02742 Page 11
NASLTRB ~~~L~~~~~ GF)iO~ZE CT0 0074 2960074 and asphalt shall Ret extend above tips of mixer blades t&en bfades are in a vertical position. Overheated and cxdmnized mixtures;, or mixtures that foam or show indication of free moisture, WiPl 4x2 reject~ed. When fxee moiscuxe is detected in hatch or continuous mix phnt produced mixtures, -haste the mix and withdraw th.e aggregates in the hot bins immediately arid return to the respective stockpiles; for drum-dryer mixew ysLant.8, waste t-.he mix, including that in surge ox storage bins that is affected by free moist,ure o -2 ._I . =._ '1 e 4 Transportation of ~it~~~~~us Mixtures wanspsrt isituminous material from the mixing plant to the pavirrg site in trucks having tight, clean, smooth beds that have been coated with a minimum arimunt of concentrates solution of hytfrated lime and water or other a~~r~~~~~ coating to prevent adhesion of the mixture to the truck. !etroleu.m products will. nst be perrnittetl for coating truck. If air temperature is Iess than 60 degrees F or if haul time is greater than 30 minu12es, c32ve.r each T.~ad with canvas or other app.rowsd material of ample size ti3 pzrotect the mixture from the loss of heat. Make deliveries so! that. the spx~adi~~ and rolling 0f all the mixture prepared for one day"s rrm can be completed during claylight, unless adequate appmved artificial lighting is provided. Deliver mixture to area to be paved so that the temperature at the tilrte of dumping into the spreader is within the range specified herein. Reject loads that are below mini.mk.km temperature, that. have crusts OE cold urw&"~YkabLe material # 0x that have beesr wet excessively by rain. Hauling over freshly Iaid material is prohibited. 3.1.5 Surface ~re~aratioR of FmderlyFng Course PXisr te, the laying of the asphalt concrete, clean underl-ying ccmrse sf foreign ox ~~j~ctiQRa~le matter with gGwer blowers ur power brooms, s~~~~~rne~ted by hand brooms and other cleaning methods where necessary. [Remove grass and other vegetative growth from existing cracks and surfaces * I 3 * I -6 Spraying Qf Contact Surfaces spraqr contact surfaces of previously constructed pavement with a thin coat c3f bituminous materials to act as an anti-stripping agent, cQriforming to Section 02744 I "Bit*minaus Tack Coat.'" Paint contact surfaces af structures with a thin coat af emulsion or other approved kdt~w.inous niaterial prior to placi.ng the bitumil~aus mixture. Tack coat the ~~r~~~iQ~ls~y placed primed coats on base ccmrses when surface has become excessively dirty and cannot be cleaned or when primed surface has cured to r;he extent that. it &s Lost all bonding effect. :r ~~~~~~~~~~T "i . 2 1 .s.2. 1 Machine ~~pr~adi~g Tfie range QE t~m~axatuyes of the mixtures at the time of sgreading shal I be between 4.a50' degrees F and 300 degrees F ~ BitulKail"~ous concrete havinc~ -P .em~~ratuxes J less than minimum spreading temperature when dumped into tie spreader wi1.P be rejected. Adjust spreader and reguLate speed so that: the surface of the couxse is smoath and ContinuQus withnr,1t tears ancl pulLiPng, ana of such depth that, ) when com~ac:ted, the surface conforms with the cross section, grade, and contour indicated. Unless othemise airectec1, begin the placing along the centerline of areas to he pav crowned section or on the high side of areas with a one-way slope- PZaee S~~T~O~~ 02742 Page 12
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REMEDIAL ACTION ENGINEERING WORK PL
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EA Engineering, Science, and Techno
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EL4 Engineering, Science, and Techo
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Project: 296.0074 Revision: DRAFT P
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Project: 296.0074 Revision: DFT Pag
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EA Engineering, Science, ancl Techn
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on of the water level or wa ision a
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EA Engineering, Science, ad Technol
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EA Engineering, Science, and Techno
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EA Tux
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Sam Morekas EA Program ~hlanagement
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Brian R. Stempowski Project Enginee
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ATTACHMENT I3 DESIGN CALCULA’IION
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I Project NASJRB Willow Grove. PA P
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NE 25 P
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S Spec
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4 I i GRLENDFOS
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..I_ DRY RUNNING. VACUUM _...“. P
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Data ll~rttchhe -& - ^” “.-- .-
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THERMT~I, INC. CEj, ;SChj) SAFE * S
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13122/QAR 0 0 3 RIDGE DETAIL 1 WALL
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Page 93 and 94: N&RB WILLOW GROVE CT0 0074 2960074
Page 95 and 96: t NASJR 7 WILLOW GROVE CT0 0074 296
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Page 109 and 110: 1.2.1 Nard Material. 8
Page 111 and 112: Free of debris, me)ts, wood, scrap
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Page 123 and 124: * \ e. Fine aggregate tests \ f.
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Page 128: WASXi53 WZLLOW GROVE CT0 0074 29600
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