1、*USACE / NAVFAC / AFCESA / NASA UFGS-32 12 43.16 (August 2008)-Preparing Activity: USACE SupersedingUFGS-32 12 20 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated June 2008*SECTION TABLE OF CONTENTSDIVISION 32 - EXTERIOR IMPROVEMENTSSECTION 32 12 43.16PO
2、ROUS FRICTION COURSE FOR AIRFIELDS AND ROADS08/08PART 1 GENERAL1.1 UNIT PRICES1.1.1 Measurement1.1.2 Payment1.1.3 Waybills and Delivery Tickets1.2 PERCENT PAYMENT1.2.1 Aggregate Gradation1.2.2 Asphalt Content1.2.3 Surface Smoothness1.2.4 Thickness Determination1.2.5 Thickness Deficiency1.3 REFERENCE
3、S1.4 SYSTEM DESCRIPTION1.4.1 Mixing Plants1.4.2 Straightedge1.4.3 Access to Plant and Equipment1.5 SUBMITTALS1.6 QUALITY ASSURANCE1.6.1 Aggregate Sampling and Testing1.6.2 Bituminous Material Requirements1.6.3 Protection of Persons and Property1.6.4 Traffic Control1.7 DELIVERY, STORAGE, AND HANDLING
4、1.7.1 Mineral Aggregate1.7.2 Bituminous Material1.7.3 Stabilizing Fiber1.7.4 Storage of PFC1.8 PROJECT/SITE CONDITIONSPART 2 PRODUCTS2.1 AGGREGATES2.1.1 Coarse Aggregate2.1.1.1 Abrasion2.1.1.2 Stone-on-Stone ContactSECTION 32 12 43.16 Page 1Provided by IHSNot for ResaleNo reproduction or networking
5、permitted without license from IHS-,-,-2.1.1.3 Crushed Gravel2.1.1.4 Coarse Aggregate Angularity2.1.1.5 Crushed Slag2.1.1.6 Aggregate Soundness2.1.1.7 Absorption2.1.2 Fine Aggregate2.1.2.1 Fine Aggregate Angularity2.1.2.2 Cleanliness2.1.3 Bituminous Materials2.1.4 Additives2.1.5 Stabilizing Fibers2.
6、2 JOB MIX FORMULA AND MOISTURE SUSCEPTIBILITY2.2.1 Job Mix Formula (JMF)2.2.2 Retained CoatingPART 3 EXECUTION3.1 PREPARATION3.1.1 Surface Preparation3.1.2 Preparation of Bituminous Mixtures3.1.2.1 Water Content of Aggregates3.1.2.2 Transportation of Bituminous Mixture3.1.2.3 Trial Test Section3.2 T
7、ACK COAT3.3 PLACING3.3.1 Offsetting Joints3.3.2 Requirements for Use of Mechanical Spreader3.3.3 Placing Strips Succeeding Initial Strips3.3.4 Handspreading in Lieu of Machine Spreading3.4 ROLLING OF MIXTURE3.5 JOINTS3.5.1 Transverse Joints3.5.2 Longitudinal Joints3.6 EDGES OF PAVEMENT3.7 CORRECTING
8、 DEFICIENT AREAS3.8 CONTRACTOR QUALITY CONTROL (CQC)3.9 ACCEPTABILITY OF WORK3.10 PROTECTION OF PAVEMENT- End of Section Table of Contents -SECTION 32 12 43.16 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-*USACE / NAVFAC / AFCESA / NASA UFGS
9、-32 12 43.16 (August 2008)-Preparing Activity: USACE SupersedingUFGS-32 12 20 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated June 2008*SECTION 32 12 43.16POROUS FRICTION COURSE FOR AIRFIELDS AND ROADS08/08*NOTE: This guide specification covers the requ
10、irements for bituminous porous friction course for airfields and roads.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 requ
11、ired 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 telephone number, i
12、s on the Internet.Recommended changes to a UFGS should be submitted as a Criteria Change Request (CCR).*PART 1 GENERAL*NOTE: The evaluation of aggregates and mix design development should be performed by an approved commercial testing laboratory at no expense to the Government. Certified copies of a
13、ggregate tests and job mixture proportions must be submitted to the Contracting Officer for approval prior to use in the work.Drawings must indicate plan of porous friction course paving showing the thickness, after compaction, of the aggregate base course, bituminous base course, and porous frictio
14、n surface course.*SECTION 32 12 43.16 Page 3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1.1 UNIT PRICES*NOTE: Paragraphs Measurement and Payment will be deleted if the work covered by this section is included in one lump-sum contract price. Lump-
15、sum contracts will not be used when the job exceeds 500 metric tons (tons).*1.1.1 MeasurementPorous friction course (PFC) tonnage paid for will be the number of metric 2000 pound tons of bituminous mixture used in the accepted work. Weigh bituminous mixture after mixing; no deduction will be made fo
16、r weight of bituminous materials incorporated in the mixture.1.1.2 Payment*NOTE: For unit-price contracts, include first set of bracketed sentences and delete the second set. For lump-sum contracts, delete the first set of bracketed sentences and include the second set. Include prescriptive unit pri
17、ce based on the Government/Engineer estimate for payment adjustment. Lump-sum contracts should not be used when the job exceeds 1000 metric tons (tons).*Quantities of PFC mixtures and bituminous materials determined as specified above will be paid for at respective contract unit prices or at reduced
18、 prices adjusted in accordance with paragraph ACCEPTABILITY OF WORK. Payment will constitute full compensation for preparing and/or reconditioning existing pavement; for furnishing all materials, equipment, plant, and tools; and for all labor and other incidentals necessary to complete work required
19、 by this section of the specifications.The measured quantity of hot-mixed asphalt will be paid for and included in the lump-sum contract price. If less than 100 percent payment is due based on the payfactors stipulated in paragraph PERCENT PAYMENT, a unit price of _ per ton shall be used for purpose
20、s of calculating the payment reduction.1.1.3 Waybills and Delivery Tickets*NOTE: This paragraph will be deleted for lump-sum contract jobs.*Before the final statement is allowed, file with the Contracting Officer certified waybills and certified delivery tickets for all aggregates and bituminous mat
21、erials actually used in the construction and covered by the contract.1.2 PERCENT PAYMENT*NOTE: The lot size can be specified on the basis of working hours (i.e., 4 hours, 1 day, etc.) or amount SECTION 32 12 43.16 Page 4Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
22、ense from IHS-,-,-of production (i.e., 500 metric tons (tons), 1000 metric tons (tons), etc.). If the lot size is based on amount of production, it should be selected to be approximately equal to the amount of the PFC mix produced in one days operation. Generally, the lot size should not exceed 1000
23、 metric tons (tons) of PFC mix. When a lump-sum contract is used, the lot size becomes the total job; thus the penalty is assessed to the contract price. For lump sum contracts retain the last sentence.*A lot shall be that quantity of construction that will be evaluated for compliance with specifica
24、tion requirements for payment. A lot shall be equal to _ metric tons tons _ hours production. When a lot of material fails to meet the specifications requirements, that lot shall be removed and replaced or accepted at a reduced price. The lowest computed percent payment determined for gradation, asp
25、halt content, and smoothness discussed below shall be the actual percent payment for the PFC mixture in that lot. The actual percent payment is applied to the bid price for PFC mixture to determine actual payment. No such adjustments in payment will be made to the bid price for bituminous material (
26、asphalt cement). In order to evaluate aggregate gradation and asphalt content, each lot shall be divided into four equal sublots. One random sample shall be taken from loaded trucks or other selected locations for each sublot of plant-produced material. Prior to placing the material, test samples of
27、 the mixture shall be taken for aggregate gradation determination and asphalt content. Each random sample shall weigh at least 1 kg 2.2 pounds. The asphalt content of these samples shall be determined by ASTM D 2172, Method A or B, ASTM D 4125 or ASTM D 6307. Gradation shall be determined on the rec
28、overed aggregate according to ASTM C 117 and ASTM C 136. For lump sum contracts the assumed cost per ton for the material for percent payment purposes shall be $_/ton.1.2.1 Aggregate GradationThe mean absolute deviation of the four sublot aggregate gradations from the JMF for each sieve size shall b
29、e determined and compared with TABLE I. The computed percent payment based on aggregate gradation will be the lowest value determined for any sieve size shown in TABLE III. All tests for aggregate gradation shall be completed and reported within 24 hours after completion of construction of each lot.
30、EXAMPLEThe computation of mean absolute deviation and percent payment for aggregate gradation is illustrated below for a typical series of gradation tests. Assume the following JMF and sublot test results for aggregate gradation.Percent by Weight Passing SievesSieve Test Test Test TestSize JMF No. 1
31、 No. 2 No. 3 No. 4_ _ _ _ _ _19.0 mm 100 100 100 100 10012.5 mm 88 87 88 90 889.5 mm 60 57 62 63 594.74 mm 35 31 36 38 33SECTION 32 12 43.16 Page 5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Percent by Weight Passing SievesSieve Test Test Test Te
32、stSize JMF No. 1 No. 2 No. 3 No. 4_ _ _ _ _ _2.36 mm 15 12 18 19 140.60 mm 8 5 11 12 70.075 mm 4 2 5 6 4Percent by Weight Passing SievesSieve Test Test Test TestSize JMF No. 1 No. 2 No. 3 No. 4_ _ _ _ _ _3/4 inch 100 100 100 100 1001/2 inch 88 87 88 90 883/8 inch 60 57 62 63 59No. 4 35 31 36 38 33No
33、. 8 15 12 18 19 14No. 30 8 5 11 12 7No. 200 4 2 5 6 4Mean Absolute Deviation for 0.075 mm No. 200 Sieve = (Absolute value of 2-4) + (Absolute value of 5-4) + (Absolute value of 6-4) + (Absolute value of 4-4)/4 = (2+1+2+0)/4 = 1.25. The mean absolute deviation for other sieve sizes can be determined
34、in a similar way for this example to be:Sieve 19.0 12.5 9.5Size mm mm mm 4.75 mm 2.36 mm 0.60 mm_ _ _ _ _ _Mean 0 0.75 2.25 2.50 2.75 2.75AbsoluteDeviationSieve 3/4 1/2 3/8Size inch inch inch NO. 4 NO. 8 NO. 30_ _ _ _ _ _Mean 0 0.75 2.25 2.50 2.75 2.75AbsoluteDeviationThe least percent payment deter
35、mined for any sieve size listed in TABLE III would be 98 percent for the 0.075 mm No. 200 sieve. Therefore for this example, the computed percent payment based on aggregate gradation is 98 percent.End of ExampleSECTION 32 12 43.16 Page 6Provided by IHSNot for ResaleNo reproduction or networking perm
36、itted without license from IHS-,-,-TABLE I. PERCENT PAYMENT BASED ON MEAN ABSOLUTE DEVIATIONOF AGGREGATE GRADATIONS FROM JMFPercent Payment Based OnMean Absolute Deviation From JMFSieve 0.0- 1.1- 2.1- 3.1- 4.1- 5.1- AboveSize 1.0 2.0 3.0 4.0 5.0 6.0 6.0_ _ _ _ _ _ _ _19.0 mm 100 100 100 100 98 95 90
37、12.5 mm 100 100 100 100 98 95 909.5 mm 100 100 100 100 98 95 904.75 mm 100 100 100 100 98 95 902.36 mm 100 100 100 98 95 90 reject0.60 mm 100 100 100 98 95 90 reject0.075 mm 100 98 90 reject reject reject rejectTABLE I. PERCENT PAYMENT BASED ON MEAN ABSOLUTE DEVIATIONOF AGGREGATE GRADATIONS FROM JMF
38、Percent Payment Based OnMean Absolute Deviation From JMFSieve 0.0- 1.1- 2.1- 3.1- 4.1- 5.1- AboveSize 1.0 2.0 3.0 4.0 5.0 6.0 6.0_ _ _ _ _ _ _ _3/4 inch 100 100 100 100 98 95 901/2 inch 100 100 100 100 98 95 903/8 inch 100 100 100 100 98 95 90No. 4 100 100 100 100 98 95 90No. 8 100 100 100 98 95 90
39、rejectNo. 30 100 100 100 98 95 90 rejectNo. 200 100 98 90 reject reject reject reject1.2.2 Asphalt ContentThe mean of the absolute deviations of the four asphalt contents (one from each sublot) from that of the JMF will be evaluated and compared with TABLE II. The computed percent payment based on a
40、sphalt content will be the value obtained from TABLE II. Complete and report all asphalt content tests within 24 hours after completion of construction of each lot.TABLE II. PERCENT PAYMENT BASED ON ASPHALT CONTENTMean Absolute Deviationof Extracted Asphalt PercentContents from JMF Payment_ _0.30 10
41、00.31-0.35 980.36-0.40 950.41-0.50 90Above 0.50 rejectSECTION 32 12 43.16 Page 7Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1.2.3 Surface Smoothness*NOTE: Select between the two editing options for preference of performing smoothness testing for each lot or for the completed surface. Testing of the co
