NAVY UFGS-32 11 30-2008 LIME TREATED SUBGRADE [LIME MODIFIED SOILS]《石灰处理路基(石灰改性土壤)》.pdf

1、USACE / NAVFAC / AFCESA / NASA UFGS-32 11 30 (August 2008)-Preparing Activity: NAVFAC SupersedingUFGS-32 11 30 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement with UMRL dated July 2008*SECTION TABLE OF CONTENTSDIVISION 32 - EXTERIOR IMPROVEMENTSSECTION 32 11 30LIME TR

2、EATED SUBGRADE LIME MODIFIED SOILS08/08PART 1 GENERAL1.1 REFERENCES1.2 SUBMITTALS1.3 DELIVERY AND STORAGE1.4 WEATHER LIMITATIONS1.4.1 Freeze Protection Method(s)1.5 QUALITY ASSURANCE1.5.1 Required DataPART 2 PRODUCTS2.1 LIME TREATMENT REQUIREMENTS2.1.1 Hydrated Lime2.1.1.1 Type I2.1.1.2 Type II2.1.1

3、3 Type III2.1.1.4 Type IV2.1.2 Quicklime2.1.2.1 Type V2.1.2.2 Type VI2.2 SOIL2.3 WATER2.4 BITUMINOUS CURING SEAL2.4.1 Emulsified AsphaltPART 3 EXECUTION3.1 SITE PREPARATION3.1.1 Grade Control3.1.2 Soil Testing3.2 LIME TREATMENT AND SEQUENCE OF CONSTRUCTION OPERATIONS3.2.1 Application Requirements3.

4、2.2 Scarification3.2.3 Dry Placing3.2.4 Slurry MethodSECTION 32 11 30 Page 1Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.2.5 Preliminary Mixing and Watering3.2.6 Preliminary Curing3.2.7 Mixing, Uniformity Testing and Compaction3.2.8 Two-Stage Pu

5、lverization and Mixing3.2.9 Finishing3.2.10 Limit of Daily Operations (Temporary Joints)3.2.11 Final Curing3.2.11.1 Curing3.3 TRAFFIC CONTROL, CURING MAINTENANCE AND DRAINAGE PROTECTION3.4 EQUIPMENT LIMITATIONS3.4.1 General3.4.2 Spreading Equipment3.4.3 Additional Mixing Equipment Limitations3.4.4 A

6、dditional Compaction Equipment Limitations3.5 SAFETY REQUIREMENTS3.6 TESTS3.6.1 General3.6.2 Optimum Moisture, Maximum Density3.6.3 Uniformity Tests3.6.4 Compaction3.6.5 Thickness and Smoothness3.6.6 Field Application Rate Test3.6.7 Frequency of Tests- End of Section Table of Contents -SECTION 32 11

7、 30 Page 2Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-*USACE / NAVFAC / AFCESA / NASA UFGS-32 11 30 (August 2008)-Preparing Activity: NAVFAC SupersedingUFGS-32 11 30 (April 2006)UNIFIED FACILITIES GUIDE SPECIFICATIONSReferences are in agreement w

8、ith UMRL dated July 2008*SECTION 32 11 30LIME TREATED SUBGRADE LIME MODIFIED SOILS08/08*NOTE: This guide specification covers the requirements for stabilization of subgrades by the application of lime.Edit this guide specification for project specific requirements by adding, deleting, or revising te

9、xt. For bracketed items, choose applicable items(s) or insert appropriate 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 p

10、roponent of the specification. A listing of technical proponents, including their organization designation and telephone number, is on the Internet.Recommended changes to a UFGS should be submitted as a Criteria Change Request (CCR).*NOTE: Plant-mix operations and independent importation/placement o

11、f new lime base or sub-base courses are not included. Undefined simplifications of this guide specification may satisfy a secondary scope of “Lime Modified Soils.“ Optional sub-title “Lime Modified Soils“ is intended for lime applications for less critical purposes than lime treated subgrade, such a

12、s drying excessively saturated construction sites during wet seasons. Considerable editing would be necessary when preparing project specification for this work.*SECTION 32 11 30 Page 3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-PART 1 GENERAL1.1

13、 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 paragraph by organization, designation, date, and title.Use the Reference Wizards Check Reference

14、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 dates.References not used in the text will automatically be deleted from this section of the

15、project specification when you choose to reconcile 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 by the basic designation only.AMERICAN ASSOCIATION OF STATE HIGHWAY A

16、ND TRANSPORTATION OFFICIALS (AASHTO)AASHTO M 216 (2005) Lime for Soil StabilizationAASHTO T 102 (1983; R 2004) Spot Test of Asphaltic MaterialsAASHTO T 219 (1987; R 2004) Testing Lime for Chemical Constituents and Particle SizesAASHTO T 27 (2006) Sieve Analysis of Fine and Coarse AggregatesASTM INTE

17、RNATIONAL (ASTM)ASTM C 207 (2006) Standard Specification for Hydrated Lime for Masonry PurposesASTM C 25 (2006) Standard Test Method for Chemical Analysis of Limestone, Quicklime, and Hydrated LimeASTM C 977 (2003) Quicklime and Hydrated Lime for Soil StabilizationASTM D 1556 (2007) Density and Unit

18、 Weight of Soil in Place by the Sand-Cone MethodASTM D 1557 (2007) Standard Test Methods for SECTION 32 11 30 Page 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3

19、) (2700 kN-m/m3)ASTM D 2397 (2005) Standard Specification for Cationic Emulsified AsphaltASTM D 2922 (2005) Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth)ASTM D 3017 (2005) Water Content of Soil and Rock in Place by Nuclear Methods (Shallow Depth)ASTM D 3551 (2002) La

20、boratory Preparation of Soil-Lime Mixtures Using a Mechanical MixerASTM D 977 (2005) Emulsified AsphaltNATIONAL LIME ASSOCIATION (NLA)NLA BUL 326 (2004) Lime-Treated Soil Construction Manual: Lime Stabilization and Lime Modification1.2 SUBMITTALS*NOTE: Review submittal description (SD) definitions i

21、n 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 Government approval. Some

22、 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 requiring Gove

23、rnment approval on Army projects, a code of up to three characters within the submittal tags may be used following the “G“ designation to indicate the approving authority. Codes for Army projects using the Resident Management System (RMS) are: “AE“ for Architect-Engineer; “DO“ for District Office (E

24、ngineering Division or other organization in the District Office); “AO“ for Area Office; “RO“ for Resident Office; and “PO“ for Project 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,

25、 or choose the second bracketed item for Army projects.*SECTION 32 11 30 Page 5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Government approval is required for submittals with a “G“ designation; submittals not having a “G“ designation are for Cont

26、ractor Quality Control approval.for information only. When used, a designation following the “G“ designation identifies the office that will review the submittal for the Government. The following shall be submitted in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:SD-04 SamplesCured lime-trea

27、ted materialLimeSubmit a typical cured sample of on-site material with the required percent of lime content.SD-05 Design DataJob-mix formulaMixing proceduresAnalysis of equipmentSD-06 Test Reports*NOTE: Perform site preparation tests dependent upon the criteria required, the condition of the existin

28、g site and the purpose of the stabilization.*NOTE: Allow nuclear testing methods for site preparation testing or final in place testing on larger projects of over 3300 per square meter 4000 square yards.*Site preparation testFinal compaction report Field application rate testSD-07 CertificatesBitumi

29、nous curing sealLimeContractor equipment listSubmit a list of construction equipment 7 days prior to bringing equipment on the job.SECTION 32 11 30 Page 6Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1.3 DELIVERY AND STORAGEDeliver lime, bituminous

30、 materials in containers showing or including designated trade name, product identification, specification number, manufacturers name, and source. Store in a manner that will prevent moisture damage, overexposure, and contamination.1.4 WEATHER LIMITATIONSDo not construct subgrade when weather condit

31、ions detrimentally affect the quality of the materials. Do not apply lime unless the air temperature is at least 5 degrees C 40 degrees F in the shade and rising. Do not apply lime to soils that are frozen or contain frost. If the air temperature falls below 2 degrees C 35 degrees F in the shade, pr

32、otect completed lime-treated areas by approved methods against the detrimental effects of freezing. Remove and replace any damaged portion of the completed soil-lime treated area with new soil-lime material in accordance with this specification.1.4.1 Freeze Protection Method(s)a. Submit Contractors

33、plan(s) for freeze protection to Contracting Officer for approval.1.5 QUALITY ASSURANCE1.5.1 Required DataTen _ days prior to the commencement of the work, a job-mix formula showing the amount of lime and water required per cubic meter cubic yard, and procedures for blending the lime/subgrade mixtur

34、e for each type of existing soil. Include process type and number of: Lime applications, stages of mixing, slurry injection depths, mixing depths and depths of compaction lifts. Also, a list of equipment to be used and their relation to method of mixing proportioning, spreading, pulverizing and comp

35、acting subgrade, slurry injection, jet slurry mixing and other related work. The formula shall also contain amount of lime, either in sacks or kg per cubic meter pounds per cubic yard and the amount of water to be used, if slurry method is used. Use the following laboratory test method when applicab

36、le: ASTM D 3551.PART 2 PRODUCTS2.1 LIME TREATMENT REQUIREMENTS*NOTE: Allow the use of Type III lime for non-critical subgrade applications such as standard roads and parking areas. For primary roads and airfields consider the use of Type I or II first. Take into consideration availability of the lim

37、e chosen (including shipping/hauling charges). Type IV should be considered when Types I, II, III and quicklime are not available or not cost effective for project use.*NOTE: Add the A/E design criteria choice and SECTION 32 11 30 Page 7Provided by IHSNot for ResaleNo reproduction or networking perm

38、itted without license from IHS-,-,-percent of lime according to the chemical composition of the soil, (including the liability of excessive sand content) purpose of the lime stabilization and local site and climatic conditions. The percent of lime will also vary according to the type of lime chosen

39、hydrated or quicklime). The disadvantages of quicklime must be considered: (1) Dry quicklime produces a coarser material with poorer distribution in soil mass because field hydration is less effective than commercial hydrators. (2) Dry quicklime requires more water than hydrate for stabilization wh

40、ich may be a problem for dry areas. (3) Dry quicklime or quicklime slurry requires careful handling due to greater susceptibility to skin and eye burns.*Perform lime treatment of subgrade. Scarify subgrade soil and mix uniformly with lime and water, spread, shape, compact and cure in accordance with

41、 these specifications and the following requirements:a. Lime requirement: The percent of hydrated lime quicklime by weight of dry soil material: _ percent.2.1.1 Hydrated Lime*NOTE: For projects in Texas specify only AASHTO M 216, Type I, Grade A.*2.1.1.1 Type I*NOTE: Specifying a grade is optional,

42、however, when no grade is specified the requirements of Grade A shall govern and when Grade B and C are used plan quantities for Grade A will be increased according to the “Basis of Purchase“ paragraph within AASHTO M 216.*AASHTO M 216 Grade A, Grade B, Grade C.2.1.1.2 Type II*NOTE: Specifying a grade is optional, however, when no grade is specified the requirements of Grade A shall govern and when Grade B and C are used plan quantities for Grade A will be increased according to the “