1、*USACE / NAVFAC / AFCESA / NASA UFGS-32 01 24 (August 2008)-Preparing Activity: USACE SupersedingUFGS-32 01 24 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated July 2008*SECTION TABLE OF CONTENTSDIVISION 32 - EXTERIOR IMPROVEMENTSSECTION 32 01 24HOT IN-P
2、LACE RECYCLING OF BITUMINOUS PAVEMENTS08/08PART 1 GENERAL1.1 MEASUREMENT AND PAYMENT PROCEDURES1.1.1 In-Place Recycled Mixture1.1.2 New Asphalt Concrete1.1.3 Payment1.2 REFERENCES1.3 SYSTEM DESCRIPTION1.3.1 Equipment, Tools, and Machines1.3.2 Heating1.3.3 Scarifying/Milling1.3.4 Distribution and Mix
3、ing1.3.5 Placement1.3.6 Straightedge1.4 SUBMITTALS1.5 QUALITY ASSURANCE1.5.1 Initial Samplimg and Testing1.5.2 Samples1.6 ENVIRONMENTAL REQUIREMENTSPART 2 PRODUCTS2.1 RECYCLING AGENTS2.2 JOB-MIX FORMULAPART 3 EXECUTION3.1 PREPARATION OF SURFACE3.2 HEATING3.3 RECYCLING PROCEDURE3.3.1 Single-Pass Meth
4、od3.3.2 Multiple-Pass Method3.4 JOINTS3.5 COMPACTION3.6 TEST SECTION3.7 ACCEPTABILITY OF WORKSECTION 32 01 24 Page 1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.7.1 Field Testing and Sampling3.7.1.1 Mixture Properties3.7.1.2 Density Testing3.7.2
5、 Grade Conformance3.7.3 Surface-Smoothness- End of Section Table of Contents -SECTION 32 01 24 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-*USACE / NAVFAC / AFCESA / NASA UFGS-32 01 24 (August 2008)-Preparing Activity: USACE SupersedingUFGS
6、-32 01 24 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated July 2008*SECTION 32 01 24HOT IN-PLACE RECYCLING OF BITUMINOUS PAVEMENTS08/08*NOTE: This guide specification covers the requirements for the hot in-place recycling of existing bituminous pavement
7、 using either single or multiple pass methods.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 requirements not required in respective projec
8、t, 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 telephone number, is on the Internet.Recomme
9、nded changes to a UFGS should be submitted as a Criteria Change Request (CCR).*PART 1 GENERAL*NOTE: Experience and data indicate that scarifying is feasible only on existing asphalt concrete pavements which are structurally sound but in need of surface leveling or which exhibit superficial distresse
10、s. In the single pass method, new asphalt concrete is either added to or placed over the existing recycled asphalt concrete. An asphalt overlay or surface treatment should be applied to the recycled pavement when a multiple-pass recycling (heater-scarifying) process is to be used.*SECTION 32 01 24 P
11、age 3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1.1 MEASUREMENT AND PAYMENT PROCEDURES*NOTE: When other methods of measurement are desired or are necessary, this paragraph will be modified accordingly. Delete the second paragraph when new asphal
12、t concrete is not added to the mixture. The term “recycling agent“ is used herein to describe any manufacturer certified material that is used to rejuvenate or lower the viscosity of the existing asphalt cement to the required levels.*1.1.1 In-Place Recycled MixtureThe quantity of hot in-place recyc
13、ling paid for will be the number of squaremeters yards completed and accepted as determined by the Contracting Officer. The number of square meters yards of planed pavement will be determined by measuring the length and width of the specified work area. Measurements will be along the surface of the
14、pavement and will be to the closest 0.01 meter inch for width and the closest meter foot for length. Recycling agent will be paid for by the number of liters gallons of material used in the accepted work.1.1.2 New Asphalt ConcreteNew asphalt concrete mixture will be paid for by the number of metric
15、2000-pound tons of material used in accepted work.1.1.3 PaymentThe quantities of recycled mixture, new asphalt concrete, and recycling agent determined as provided above, will be paid for at contract unit prices per square meter yard for recycled mixture and per metric ton ton for new asphalt concre
16、te and per liter gallon for recycling agent. If deficiencies in the finished product exceed specified tolerances, no payment will be made for such areas of pavement until the defective areas are corrected and accepted by the Contracting Officer.1.2 REFERENCES*NOTE: This paragraph is used to list the
17、 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 paragraph by organization, designation, date, and title.Use the Reference Wizards Check Reference feature when you add a RID outside of the Sections R
18、eference Article to automatically place the reference in the Reference Article. Also use the Reference Wizards Check Reference feature to update the issue dates.References not used in the text will automatically be deleted from this section of the project specification when you choose to reconcile S
19、ECTION 32 01 24 Page 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-references in the publish print process.*The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text
20、by the basic designation only.ASTM INTERNATIONAL (ASTM)ASTM C 117 (2004) Standard Test Method for Materials Finer than 75-um (No. 200) Sieve in Mineral Aggregates by WashingASTM C 136 (2006) Standard Test Method for Sieve Analysis of Fine and Coarse AggregatesASTM D 140 (2001; R 2007) Sampling Bitum
21、inous MaterialsASTM D 1856 (1995a; R 2003) Recovery of Asphalt from Solution by Abson MethodASTM D 2041 (2003a) Theoretical Maximum Specific Gravity and Density of Bituminous Paving MixturesASTM D 2170 (2007) Kinematic Viscosity of Asphalts (Bitumens)ASTM D 2171 (2007) Viscosity of Asphalts by Vacuu
22、m Capillary ViscometerASTM D 2172 (2005) Quantitative Extraction of Bitumen from Bituminous Paving MixturesASTM D 2726 (2005a) Bulk Specific Gravity and Density of Non-Absorptive Compacted Bituminous MixturesASTM D 3381 (2005) Viscosity-Graded Asphalt Cement for Use in Pavement ConstructionASTM D 36
23、65 (2007) Random Sampling of Construction MaterialsASTM D 4552 (1992; R 2004) Classifying Hot-Mix Recycling AgentsASTM D 75 (2003) Standard Practice for Sampling AggregatesASTM D 946 (1982; R 2005) Penetration-Graded Asphalt Cement for Use in Pavement ConstructionU.S. ARMY CORPS OF ENGINEERS (USACE)
24、COE CRD-C 649 (1995) Standard Test Method for Unit Weight, Marshall Stability, and Flow of Bituminous MixturesSECTION 32 01 24 Page 5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-COE CRD-C 650 (1995) Standard Test Method for Density and Percent Voi
25、ds of Compacted Bituminous Paving Mixtures1.3 SYSTEM DESCRIPTION1.3.1 Equipment, Tools, and MachinesMaintain equipment, tools, and machines used in the performance of the work in a satisfactory working condition at all times, and in conformance with applicable governing regulations for local air pol
26、lution controls. Provide equipment capable of performing recycling operations at a minimum rate of 600 square meters 720 square yards per hour to the depth required.1.3.2 HeatingProvide heating units that use radiant heat with no flame directly on the pavement. The combustion chamber shall be insula
27、ted and totally enclosed. Shield the heating units with an enclosed hood to hold in the heat and to protect workers and surrounding areas.1.3.3 Scarifying/MillingProvide scarifying or hot milling equipment that is able to penetrate the pavement surface so as to cut to the specified depth without ten
28、sile fracturing the aggregate in the pavement. When used for this purpose, the scarifiers or hot milling heads shall be able to thoroughly mix the recycled mixture with any material that is added as part of the recycling process. Provide equipment with height adjustments to clear obstacles in the pa
29、vement.1.3.4 Distribution and MixingProvide at least one unit of the recycling equipment capable of uniformly distributing and mixing the recycling agent and new asphalt concrete with the recycled material. Distribution of the added material shall have a positive feed and shut-off linked to the move
30、ment of the unit. The range of application shall be within that required for the project and should be controllable to plus or minus 0.023 L/square meter 0.05 gallons/square yard. Heat the recycling agent, at the time of application, to within plus or minus 14 degrees C 25 degrees F of the temperatu
31、re of the recycled mixture.1.3.5 Placement*NOTE: Units used in single-pass method recycling should have automated grade and cross-slope controls. Multiple-pass method units (heater-scarifying) generally do not have automated controls.*Provide a unit capable of spreading and leveling the recycled mix
32、ture uniformly across the processed width and with a vibratory or tamping screed to finish the recycled mixture surface.SECTION 32 01 24 Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1.3.6 StraightedgeFurnish and maintain at the site, in good
33、 condition, one 3.66 meter 12 foot straightedge for each finishing unit (paver) for testing the finished surface. Make straightedges available for Government use. Straightedges shall be constructed of aluminum or other lightweight metal, with blades of box or box-girder cross section with flat botto
34、m, reinforced to insure rigidity and accuracy and with handles to facilitate movement on the pavement.1.4 SUBMITTALS*NOTE: Review submittal description (SD) definitions in Section 01 33 00 SUBMITTAL PROCEDURES and edit the following list to reflect only the submittals required for the project. Submi
35、ttals should be kept to the minimum required for adequate quality control.A “G” following a submittal item indicates that the submittal requires Government 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 th
36、rough the Contractors Quality Control system. Only add a “G” if the submittal is sufficiently important or complex in context of the project.For submittals requiring Government approval on Army projects, a code of up to three characters within the submittal tags may be used following the “G“ designa
37、tion to indicate the approving authority. Codes for Army projects using the Resident Management System (RMS) are: “AE“ for Architect-Engineer; “DO“ for District Office (Engineering Division or other organization in the District Office); “AO“ for Area Office; “RO“ for Resident Office; and “PO“ for Pr
38、oject Office. Codes following the “G“ typically are not used for Navy, Air Force, and NASA projects.Choose the first bracketed item for Navy, Air Force and NASA projects, or choose the second bracketed item for Army projects.*Government approval is required for submittals with a “G“ designation; sub
39、mittals not having a “G“ designation are for Contractor Quality Control approval. information only. When used, a designation following the “G“ designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCE
40、DURES:SD-04 SamplesSamplesA 200 kg 400 lb sample of existing asphalt concrete. Where a single-pass remix process is used, a 100 kg 200 lb sample of each SECTION 32 01 24 Page 7Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-new aggregate stockpile to
41、 make blended samples for the mix design, a 20 liter 5 gal sample of asphalt cement, and a 20 liter 5 gal sample of recycling agent. Submit all samples not less than 30 _ days before the material is required in the work.SD-06 Test ReportsField Testing and SamplingCopies of test results within 24 hou
42、rs of material sampling. Copies of test reports on material properties of existing asphalt pavement and new asphalt concrete, not less than 30 _ days before the material is required in the work. Include with the test reports information establishing compliance with the specifications detailed herein
43、 and in referenced publications. Certified copies of the recycling agent manufacturers test reports indicating compliance with applicable specified requirements, not less than 30 _ days before the material is required in the work.1.5 QUALITY ASSURANCE*NOTE: The amount of sampling and testing require
44、d will depend upon the type of hot in-place recycling performed. Multiple-pass or heater-scarifying processes do not add any additional materials and will only require testing for the amount of recycling agent to be added to the mixture. The single-pass remix processes may require job-mix-formula tests when new asphalt concrete is to be combined with the recycled mixture.*1.5.1 Initial Samplim
