1、*USACE / NAVFAC / AFCESA / NASA UFGS-32 12 21 (August 2008)-Preparing Activity: USACE SupersedingUFGS-32 12 21 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated July 2008*SECTION TABLE OF CONTENTSDIVISION 32 - EXTERIOR IMPROVEMENTSSECTION 32 12 21BITUMINO
2、US ROAD-MIX SURFACE COURSE08/08PART 1 GENERAL1.1 UNIT PRICES1.1.1 Measurement1.1.1.1 Surface Course1.1.1.2 Bituminous Material1.1.2 Payment1.1.3 Waybills and Delivery Tickets1.2 REFERENCES1.3 SYSTEM DESCRIPTION1.3.1 Traveling-Plant Mixer1.3.2 Bituminous Distributor1.3.3 Heating Equipment for Storage
3、 Tanks1.3.4 Blade Graders1.3.5 Power Rollers1.3.5.1 Steel-Wheel1.3.5.2 Pneumatic-Tired1.3.6 Mechanical Spreaders1.3.7 Tractors1.3.8 Miscellaneous Equipment1.3.9 Safety Precautions1.4 SUBMITTALS1.5 ENVIRONMENTAL REQUIREMENTSPART 2 PRODUCTS2.1 AGGREGATES2.1.1 Coarse Aggregate2.1.1.1 Crushed Stone2.1.1
4、.2 Crushed Gravel2.1.1.3 Crushed Slag2.1.2 Fine Aggregate2.1.3 Mineral Filler2.2 BITUMINOUS MATERIALS2.3 COMPOSITION OF MIXTURE2.3.1 Job-Mix FormulaSECTION 32 12 21 Page 1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2.3.2 Gradation Limits for Aggr
5、egates2.3.3 Quantity of Bituminous MaterialPART 3 EXECUTION3.1 PLACING AND WINDROWING AGGREGATE3.2 RECONDITIONING OF BASE COURSE3.3 PREPARATION OF BASE COURSE AND AGGREGATE3.4 MIXING WINDROWED AGGREGATE AND BITUMINOUS MATERIAL3.4.1 Travel-Plant Method3.4.2 Blade Method3.5 PROCEDURE WITH THICKENED ED
6、GE3.6 SPREADING AND SHAPING3.7 ROLLING FINISHED SURFACE3.8 SHAPING OF EDGES3.9 GRADE CONTROL3.10 SURFACE SMOOTHNESS AND THICKNESS TESTING3.11 SAMPLING AND TESTING3.11.1 Sources of Materials3.11.2 Field Testing3.11.2.1 Aggregate and Bitumen Sampling3.11.2.2 Asphalt Sampling3.11.2.3 Testing3.11.3 Test
7、ing of Windrowed Aggregate3.11.4 Moisture Content of Windrowed Aggregate3.11.5 Tolerance3.11.5.1 Surface-Smoothness Requirements3.11.5.2 Thickness Requirements- End of Section Table of Contents -SECTION 32 12 21 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
8、se from IHS-,-,-*USACE / NAVFAC / AFCESA / NASA UFGS-32 12 21 (August 2008)-Preparing Activity: USACE SupersedingUFGS-32 12 21 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated July 2008*SECTION 32 12 21BITUMINOUS ROAD-MIX SURFACE COURSE08/08*NOTE: This g
9、uide specification covers the requirements for bituminous road-mix surface course.Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable items(s) or insert appropriate information.Remove information and requiremen
10、ts not required in respective project, whether or not brackets are present.Comments and suggestions on this guide specification are welcome and should be directed to the technical proponent of the specification. A listing of technical proponents, including their organization designation and telephon
11、e number, is on the Internet.Recommended changes to a UFGS should be submitted as a Criteria Change Request (CCR).*PART 1 GENERAL1.1 UNIT PRICES*NOTE: This paragraph will be deleted when all the work is included in one lump sum contract price.*1.1.1 Measurement1.1.1.1 Surface Course*NOTE: This parag
12、raph will be used when the surface course consists of only new aggregates or of aggregates existing on the roadway. When new aggregate is to be mixed with aggregate existing on SECTION 32 12 21 Page 3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-th
13、e roadway, an additional subparagraph will be inserted in paragraph Measurement as follows:New Aggregates: The amount of approved new aggregate to be paid for will be the number of cubic meters (yards) used in the completed and accepted surface course.*The square meters yards of surface course shall
14、 be the number of square meters yards of completed and accepted surface course.1.1.1.2 Bituminous MaterialBituminous material to be paid for shall be the number of metric 2000 poundtons liters gallons of the material used in the accepted work, as determined by the Contracting Officer, corrected to l
15、iters gallons at 15.6 degrees C 60 degrees F in accordance with ASTM D 633 ASTM D 1250. A coefficient of expansion of 0.00045 per degree C 0.00025 per degree F shall be used for asphalt emulsions.1.1.2 PaymentThe amount of pavements and quantities of bituminous material, determined as specified in p
16、aragraph Measurement, will be paid for at the respective contract unit prices in the bid schedule on which the contract is based, which payment will constitute full compensation for preparing or reconditioning subgrade or base course; furnishing all plant, materials, equipment, and tools; correcting
17、 unsatisfactory areas; and the labor and incidentals necessary to complete the work required by this section of the specifications.1.1.3 Waybills and Delivery TicketsBefore the final statement is allowed, file with the Contracting Officer certified waybills and delivery tickets for all the bituminou
18、s and paving materials used in the construction covered by this section of specifications.1.2 REFERENCES*NOTE: This paragraph is used to list the publications cited in the text of the guide specification. The publications are referred to in the text by basic designation only and listed in this parag
19、raph by organization, designation, date, and title.Use the Reference Wizards Check Reference feature when you add a RID outside of the Sections Reference Article to automatically place the reference in the Reference Article. Also use the Reference Wizards Check Reference feature to update the issue
20、dates.References not used in the text will automatically be deleted from this section of the project specification when you choose to reconcile SECTION 32 12 21 Page 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-references in the publish print pro
21、cess.*The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.ASTM INTERNATIONAL (ASTM)ASTM C 131 (2006)Standard Test Method for Resistance to Degradation of Small-Size Coarse Aggregate b
22、y Abrasion and Impact in the Los Angeles MachineASTM C 183 (2002) Standard Practice for Sampling and the Amount of Testing of Hydraulic CementASTM C 29/C 29M (2007) Standard Test Method for Bulk Density (“Unit Weight“) and Voids in AggregateASTM D 1073 (2007) Fine Aggregate for Bituminous Paving Mix
23、turesASTM D 1250 (2007) Standard Guide for Use of the Petroleum Measurement TablesASTM D 140 (2001; R 2007) Sampling Bituminous MaterialsASTM D 2026 (1997; R 2004) Cutback Asphalt (Slow-Curing Type)ASTM D 2027 (1997; R 2004) Cutback Asphalt (Medium-Curing Type)ASTM D 2028 (1997; R 2004) Cutback Asph
24、alt (Rapid-Curing Type)ASTM D 2397 (2005) Standard Specification for Cationic Emulsified AsphaltASTM D 242 (2004) Mineral Filler for Bituminous Paving MixturesASTM D 4318 (2005) Liquid Limit, Plastic Limit, and Plasticity Index of SoilsASTM D 490 (1992; R 2005) Road TarASTM D 633 (1997; R 2005) Volu
25、me Correction Table for Road TarASTM D 75 (2003) Standard Practice for Sampling AggregatesASTM D 977 (2005) Emulsified AsphaltSECTION 32 12 21 Page 5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1.3 SYSTEM DESCRIPTION*NOTE: This paragraph will be m
26、odified, based on local conditions, to include only those types of equipment that are required by the method or methods of construction to be employed.*Maintain equipment, plant, and tools used in the performance of the work in a satisfactory working condition at all times. Provide access to the Con
27、tracting Officer, at all times, to the equipment and plant to insure proper operation and compliance with specifications.1.3.1 Traveling-Plant MixerProvide a self-propelled or tractor-drawn traveling-plant mixer capable of maintaining a uniform rate of travel. The plant shall be mounted on wheels or
28、 tread equipment of such type as will not overload or damage the subgrade or base course when the mixer is loaded to capacity. The device for picking up aggregates from windrows shall be such as to pick up only the windrowed aggregate, leaving the base clean. The pick-up and elevator shall be entire
29、ly enclosed to prevent the wind from removing the fine and filler aggregate. The equipment for proportioning the aggregate and bituminous material shall accurately measure the specified amounts of material for the mix while the machine is in operation, and shall be equipped with devices for accurate
30、ly proportioning the filler added to the mixture. The plant shall be capable of thoroughly combining the aggregates and bituminous material into a uniform mixture, completely coating all particles of aggregate, and shall be capable of depositing the processed mixture on the base course.1.3.2 Bitumin
31、ous DistributorProvide a bituminous distributor with pneumatic tires of such width and number that the load produced on the base course will not exceed 11.6 kg per mm 650 pounds per inch of tire width. The distributor shall be so designed and equipped as to distribute the bituminous material uniform
32、ly at even heat on variable widths of surface at readily determined and controlled rates from 0.23 to 0.91 L/square meter 0.05 to 2.0 gallons/square yard, with a specified rate not exceeding 5 percent. Include with the distributor equipment a separate power unit for the bitumen pump, fully circulati
33、ng spray bars, a tachometer, pressure gauges, volume-measuring devices, a thermometer for reading the temperature of the tank contents, and a hose attachment suitable for applying bituminous material to spots missed by the distributor. The distributor shall be equipped for circulation and agitation
34、of the bituminous material during the heating process. Provide heating equipment capable of maintaining the bituminous material at the specified temperature.1.3.3 Heating Equipment for Storage TanksMaintain specified temperature with heating equipment for storage tanks, but direct flame shall not be
35、 applied to walls of storage tank or transfer lines. Fix an armored thermometer with a range from 65 to 200 degrees C 150 to 400 degrees F to the tank so that the temperature of the bituminous material can be determined at all times.SECTION 32 12 21 Page 6Provided by IHSNot for ResaleNo reproduction
36、 or networking permitted without license from IHS-,-,-1.3.4 Blade GradersProvide self-powered blade graders for windrowing aggregate, for mixing, and for spreading processed material. Each grader shall have a wheelbase not less than 5.18 m 17 feet, a blade not less than 3.66 m 12 feet long, and be e
37、quipped with pneumatic tires. Blade graders, weighing at least 7 metric tons 8 tons, shall be adequately powered in order to perform the work properly.1.3.5 Power RollersProvide power rollers which are steel-wheel or pneumatic-tired types conforming to the following requirements:1.3.5.1 Steel-WheelS
38、teel-wheel rollers shall be either tandem or three-wheel type weighing not less than 4.5 metric tons 5 tons, and equipped with adjustable scrapers. The rollers, which may be static or vibratory, shall be equipped with watertanks and sprinkling apparatus, to be used when necessary, to keep the wheels
39、 wet preventing adherence of the bituminous material to the wheels.1.3.5.2 Pneumatic-TiredProvide self-propelled pneumatic-tired rollers equipped with not less than 9 wheels mounted on 2 axles in such manner that the rear tires will not follow in the tracks of the forward group. The pneumatic-tired
40、rollers shall also be equipped with suitable beams or platforms for ballast loading and loaded to provide required compaction. Inflate the tires uniformly to not less than 310 kPa 45 psi.1.3.6 Mechanical SpreadersProvide equipment for spreading, shaping, and finishing consisting of approved, self-co
41、ntained, power machines capable of taking the bituminous mixture directly from the discharge end of traveling plant and spreading the mixture at the required application rate.1.3.7 TractorsTractors shall be of the crawler type equipped with street plates or flat treads.1.3.8 Miscellaneous EquipmentD
42、isk, spike-tooth, or spring-tooth harrows, multiple-blade or retread mixers, small tools, and other equipment shall be the required types.1.3.9 Safety PrecautionsDo not permit smoking, or open flames within 8 m 25 feet of heating, distributing, or transferring operations of cutback bituminous materi
43、als. When tar is used, a full-face, organic, vapor-type respirator and protective creams shall be used by personnel exposed to fumes.1.4 SUBMITTALS*NOTE: Review submittal description (SD) definitions SECTION 32 12 21 Page 7Provided by IHSNot for ResaleNo reproduction or networking permitted without
44、license from IHS-,-,-in Section 01 33 00 SUBMITTAL PROCEDURES and edit the following list to reflect only the submittals required for the project. Submittals should be kept to the minimum required for adequate quality control.A “G” following a submittal item indicates that the submittal requires Gov
45、ernment approval. Some submittals are already marked with a “G”. Only delete an existing “G” if the submittal item is not complex and can be reviewed through the Contractors Quality Control system. Only add a “G” if the submittal is sufficiently important or complex in context of the project.For submittals requir
