ARMY UFGS-32 11 34-2008 PORTLAND CEMENT-STABILIZED BASE OR SUBBASE COURSE《波特兰水泥稳定基层或基层》.pdf

1、*USACE / NAVFAC / AFCESA / NASA UFGS-32 11 34 (August 2008)-Preparing Activity: USACE SupersedingUFGS-32 11 34 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated July 2008*SECTION TABLE OF CONTENTSDIVISION 32 - EXTERIOR IMPROVEMENTSSECTION 32 11 34PORTLAND

2、 CEMENT-STABILIZED BASE OR SUBBASE COURSE08/08PART 1 GENERAL1.1 UNIT PRICES1.1.1 Measurement1.1.1.1 Portland Cement Stabilization1.1.1.2 Cement1.1.1.3 Bituminous Material1.1.1.4 Select Material1.1.2 Payment1.1.3 Waybills and Delivery Tickets1.2 REFERENCES1.3 DEFINITION1.4 SYSTEM DESCRIPTION1.4.1 Cen

3、tral-Plant1.4.2 Straightedge1.5 SUBMITTALS1.6 ENVIRONMENTAL REQUIREMENTSPART 2 PRODUCTS2.1 MATERIALS2.1.1 Cement2.1.2 Bituminous Material2.1.2.1 Cutback Asphalt2.1.2.2 Emulsified Asphalt2.1.2.3 Tar2.1.3 Material to be Stabilized2.1.4 Water2.1.5 Burlap2.1.6 Impervious Sheeting2.2 MIX DESIGN2.3 SAMPLI

4、NG AND TESTING2.3.1 Testing Facilities2.3.2 Test Results2.3.3 Aggregate2.3.4 Initial Sampling and TestingSECTION 32 11 34 Page 1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2.3.4.1 Laboratory Density2.3.4.2 Unconfined Compression Testing2.3.4.3 Du

5、rability Tests2.3.5 Sieve Analysis2.3.6 Liquid Limit and Plasticity Index2.3.7 Sampling and Testing During ConstructionPART 3 EXECUTION3.1 GENERAL REQUIREMENTS3.2 OPERATION OF BORROW PITS3.3 STOCKPILING MATERIALS3.4 PREPARATION OF AREA TO BE STABILIZED3.4.1 In-Place Material to be Stabilized3.4.2 In

6、-Place Materials to Receive Stabilized Course3.4.3 Select Material3.5 INSTALLATION3.5.1 Edges of Stabilized Course3.5.2 Mixed-in-Place Method3.5.2.1 Scarifying and Pulverizing of Soil3.5.2.2 Application of Cement3.5.2.3 Dry Mixing3.5.2.4 Water Application and Moist Mixing3.5.3 Central-Plant Method3.

7、5.4 Traveling-Plant Method3.5.5 Layer Thickness3.5.6 Compaction3.6 FINISHING3.7 CONSTRUCTION JOINTS3.8 CURING AND PROTECTION3.8.1 Moist Curing3.8.2 Burlap3.8.3 Impervious Sheeting3.9 BITUMINOUS MATERIAL APPLICATION3.10 FIELD QUALITY CONTROL3.10.1 Grade Control3.10.2 Smoothness Test3.10.3 Thickness C

8、ontrol3.10.4 Testing3.10.5 Field Density3.10.6 Samples of Bituminous Materials3.10.7 Maintenance3.10.8 Traffic3.11 DISPOSAL OF UNSATISFACTORY MATERIALS- End of Section Table of Contents -SECTION 32 11 34 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from

9、IHS-,-,-*USACE / NAVFAC / AFCESA / NASA UFGS-32 11 34 (August 2008)-Preparing Activity: USACE SupersedingUFGS-32 11 34 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated July 2008*SECTION 32 11 34PORTLAND CEMENT-STABILIZED BASE OR SUBBASE COURSE08/08*NOTE:

10、 This guide specification covers the requirements for portland cement-stabilized base or subbase and lean concrete bases or subbases.Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable items(s) or insert approp

11、riate information.Remove information and requirements 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, in

12、cluding their organization designation and telephone number, is on the Internet.Recommended changes to a UFGS should be submitted as a Criteria Change Request (CCR).*PART 1 GENERAL*NOTE: In general, this specification is written for portland cement-stabilized base or subbase courses and is applicabl

13、e to lean concrete bases or subbases (also popularly known as “Econocrete“) since materials and construction procedures are similar. The lean concrete base may or may not require sawcut construction joints depending on the engineers purpose in using the base and the planned surfacing construction. G

14、enerally, all longitudinal construction joints are butt joints without keys, dowels, or tie bars.Lean concrete base differs from conventional paving concrete primarily due to lower cement contents. SECTION 32 11 34 Page 3Provided by IHSNot for ResaleNo reproduction or networking permitted without li

15、cense from IHS-,-,-Sometimes a poorer quality aggregate may be used but the durability of this aggregate under the projects freezing and thawing conditions should be investigated. Other considerations such as popouts or easily polished aggregates are of less concern in a base than in a surface pavem

16、ent. Aggregate quality requirements may be relaxed for these considerations.The dividing line between a portland cement-stabilized base or subbase and lean concrete base or subbase is not clear. Generally, if the materials compressive strength is less than 10 MPa (1500 psi), the flexural strength is

17、 less than 2.5 MPa (350 psi), or the amount of material passing the 0.075 mm (No. 200) sieve is allowed to increase appreciably, it should be treated as a stabilized base or subbase rather than lean concrete base or subbase.*1.1 UNIT PRICES1.1.1 Measurement*NOTE: This paragraph will be deleted when

18、lump-sum payment is desired.Method of measurement not applicable to the job conditions will be deleted. If bituminous material is to be paid for separately, select the desired method of measurement. Reference to select material will be deleted when select material is not required from borrow areas.*

19、1.1.1.1 Portland Cement StabilizationMeasurement shall be by the square m yard of work completed and accepted.1.1.1.2 CementMeasurement shall be by the number of kg short hundred-weight (cwt) of cement used in the completed and accepted work. No measurement shall be made for wasted cement or cement

20、used in work determined defective.1.1.1.3 Bituminous MaterialBituminous material to be paid for shall be measured by the number of L gallons of the material used in the accepted work, corrected to L at 15 degrees C gallons at 60 degrees F in accordance with ASTM D 633 ASTM D 1250. A coefficient of 0

21、.00045 per degree C 0.00025 per degree F shall be used for asphalt emulsion metric 2000 pound tons of the material used in the accepted work.1.1.1.4 Select MaterialSelect material shall be measured by the cubic meter yard metric 2000 SECTION 32 11 34 Page 4Provided by IHSNot for ResaleNo reproductio

22、n or networking permitted without license from IHS-,-,-pound ton of material placed and used in the completed and accepted stabilization. No measurement will be made for select material that is wasted or used in work determined defective.1.1.2 Payment*NOTE: Paragraph will be deleted when select mate

23、rial is not required or when small quantities do not justify the inclusion of select material. Delete material in the first set of brackets when onsite material is not available.Reference to select material will be deleted when select material is not required from borrow areas.The last sentence in b

24、rackets will be deleted if sanding and dusting of the bituminous-cured surfaces is not required or if bituminous-cured surfaces are to receive bituminous surfacing under the contract.*Cement stabilization, constructed and accepted, including cement, bituminous material and select material will be pa

25、id for at the respective contract unit prices in the bidding schedule. No payment will be made for any material wasted, used for the convenience of the Contractor, unused or rejected, or for water used. Select material obtained from grading and excavation operations at the project site will not be p

26、aid for under this section but will be included for payment under other sections specifying grading and excavating. No separate payment will be made for sanding or dusting the bituminous prime-coated surfaces, and all costs for sanding or dusting will be included in the contract unit price for bitum

27、inous material.1.1.3 Waybills and Delivery Tickets*NOTE: This paragraph will be deleted when lump-sum payment is desired.*Copies of waybills or delivery tickets shall be submitted during the progress of the work. Before the final payment is allowed, waybills and certified delivery tickets shall be f

28、urnished for all cement , bituminous material and select material used in the construction.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 para

29、graph 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 SECTION 32 11 34 Page 5Provided by IHSNot for ResaleNo reproduction or networking permitted without license fr

30、om IHS-,-,-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 references in the publish print pr

31、ocess.*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.AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS (AASHTO)AASHTO M 147 (1965; R 2004) Materials for Aggrega

32、te and Soil-Aggregate Subbase, Base and Surface CoursesAASHTO M 182 (2005) Standard Specification for Burlap Cloth Made from Jute or Kenaf and Cotton MatsAASHTO M 81 (1992; R 2004) Cut-Back Asphalt (Rapid-Curing Type)AASHTO M 82 (1975; R 2004) Cut-Back Asphalt (Medium-Curing Type)AASHTO T 134 (2005)

33、 Moisture-Density Relations of Soil-Cement MixturesAASHTO T 135 (1997; R 2005) Wetting-and-Drying Test of Compacted Soil-Cement MixturesAASHTO T 136 (1997; R 2005) Freezing-and-Thawing Tests of Compacted Soil-Cement MixturesASTM INTERNATIONAL (ASTM)ASTM C 136 (2006) Standard Test Method for Sieve An

34、alysis of Fine and Coarse AggregatesASTM C 150 (2007) Standard Specification for Portland CementASTM C 171 (2007) Standard Specification for Sheet Materials for Curing ConcreteASTM C 595 (2008) Standard Specification for Blended Hydraulic CementsASTM D 1241 (2007) Materials for Soil-Aggregate Subbas

35、e, Base, and Surface CoursesASTM D 1250 (2007) Standard Guide for Use of the Petroleum Measurement TablesSECTION 32 11 34 Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASTM D 1556 (2007) Density and Unit Weight of Soil in Place by the Sand-Co

36、ne MethodASTM D 1557 (2007) Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3) (2700 kN-m/m3)ASTM D 1632 (2007) Making and Curing Soil-Cement Compression and Flexure Test Specimens in the LaboratoryASTM D 1633 (2000; R 2007) Compressive

37、Strength of Molded Soil-Cement CylindersASTM D 2027 (1997; R 2004) Cutback Asphalt (Medium-Curing Type)ASTM D 2028 (1997; R 2004) Cutback Asphalt (Rapid-Curing Type)ASTM D 422 (1963; R 2007) Particle-Size Analysis of SoilsASTM D 4318 (2005) Liquid Limit, Plastic Limit, and Plasticity Index of SoilsA

38、STM D 490 (1992; R 2005) Road TarASTM D 558 (2004) Moisture-Density (Unit Weight) Relations of Soil-Cement MixturesASTM D 559 (2003) Wetting and Drying Compacted Soil-Cement MixturesASTM D 560 (2003) Freezing and Thawing Compacted Soil-Cement MixturesASTM D 633 (1997; R 2005) Volume Correction Table

39、 for Road TarASTM D 6938 (2007a) Standard Test Method for In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth)ASTM D 75 (2003) Standard Practice for Sampling AggregatesASTM D 977 (2005) Emulsified AsphaltASTM E 11 (2004) Wire Cloth and Sieves for Testing P

40、urposes1.3 DEFINITIONPortland cement-stabilized base or subbase course, as used herein, is a mixture of portland cement and in-place, or select borrow, material SECTION 32 11 34 Page 7Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-uniformly blended

41、and thoroughly compacted to produce a pavement course which meets the criteria set forth in the drawings and specifications.1.4 SYSTEM DESCRIPTIONPlant, equipment, machines, and tools used in the work shall be subject to approval and shall be maintained in a satisfactory working condition at all tim

42、es. Provide equipment with the capability of producing the required compaction, meeting grade controls, thickness control and smoothness requirements specified. Place a test section of at least 2.5 by 30 m 8 by 100 feet, utilizing the equipment and procedures proposed for use by the Contractor, to d

43、emonstrate that soil-cement stabilization conforming to this specification can be produced A test section is not required.1.4.1 Central-PlantProvide a central plant capable of producing a uniform cement-treated mixture at the required cement and moisture contents. Soil and cement shall be dry-mixed

44、sufficiently to prevent cement balls from forming when water is added.1.4.2 StraightedgeFurnish and maintain at the site, in good condition, one 3.05 3.66 meter10 12 foot straightedge for each bituminous paver, for use in the testing of the finished surface. Make straightedges available for Government use. Construct straightedges of aluminum or other lightweight metal with blades of box or box-girder cross section with flat bottom reinforced to insure rigidity and accuracy. Straightedges shall have hand