312323-RIB-Fill-05-03-2024.pdf
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- Attached to
- Rehabilitation of Lift Station 12
- Solicitation number
- 24-030
- Issued by
- Charles County, Florida
About this file
The document is a technical specification section (Section 312323) for Fill materials and procedures for the Gulf Boulevard Landscape Phase 3 project in Navarre, Florida, prepared by WAS Design, Inc. The specification provides comprehensive guidelines for filling, backfilling, and compacting for building volumes below grade, landscaped areas, and utility connections. It details requirements for fill materials, which include on-site subsoil and topsoil, with specific grading and composition standards. The document outlines precise technical requirements for material selection, preparation, placement, compaction, and quality control, with specific density requirements varying between 80-97 percent maximum dry density depending on the area of application.
The specification emphasizes rigorous quality control measures, requiring soil samples, composition test reports, and compaction density testing in accordance with multiple ASTM and AASHTO standards. Fill materials must be free of debris, rocks, and unsuitable matter, with specific size limitations and grading requirements. Topsoil must have a pH range of 5.5 to 7.5 and contain 4-25 percent inorganic matter. The document provides detailed instructions for fill placement, including layer thickness (not exceeding 8 inches compacted), moisture content maintenance, and slope grading. Contractors must follow strict protocols for material storage, contamination prevention, and post-construction site cleanup, with tolerances of plus or minus 1 inch from required elevations.
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Text version
Gulf Boulevard Landscape Phase 3 Navarre, Florida
246024-001
Fill WAS Design, Inc.
312323 - 1
SECTION 312323
FILL
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Filling , backfilling, and compacting for building volume below grade and landscaped areas .
B. Backfilling and compacting for utilities outside the building to utility main connections.
C. Filling holes, pits, and excavations generated as a result of removal (demolition) operations.
1.02 RELATED REQUIREMENTS
A. Section 312200 - Grading: Site grading.
1.03 DEFINITIONS
A. Finish Grade Elevations: Indicated on drawings.
1.04 REFERENCE STANDARDS
A. AASHTO M 147 - Standard Specification for Materials for Aggregate and Soil–Aggregate Subbase, Base, and Surface Courses; 2017 (Reapproved 2021).
B. AASHTO T 180 - Standard Method of Test for Moisture-Density Relations of Soils Using a 4.54-kg (10-lb) Rammer and a 457-mm (18-in.) Drop; 2022, with Errata .
C. ASTM C136/C136M - Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates; 2019.
D. ASTM D698 - Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft-lbf/ft3 (600 kN-m/m3)); 2012 (Reapproved 2021).
E. ASTM D1556/D1556M - Standard Test Method for Density and Unit Weight of Soil in Place by Sand-Cone Method; 2015, with Editorial Revision (2016).
F. ASTM D1557 - Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3 (2,700 kN-m/m3)); 2012 (Reapproved 2021).
G. ASTM D2167 - Standard Test Method for Density and Unit Weight of Soil in Place by the Rubber Balloon Method; 2015.
H. ASTM D2487 - Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System); 2017, with Editorial Revision (2020).
I. ASTM D4318 - Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils; 2017, with Editorial Revision (2018).
J. ASTM D6938 - Standard Test Methods for In-Place Density and Water Content of Soil and Soil- Aggregate by Nuclear Methods (Shallow Depth); 2023.
1.05 SUBMITTALS
A. See Section 013000 - Administrative Requirements, for submittal procedures.
B. Soil Samples: 10 pounds sample of each type of fill; submit in air-tight containers to testing laboratory.
C. Fill Composition Test Reports: Results of laboratory tests on proposed and actual materials used, including manufactured fill.
D. Compaction Density Test Reports.
E. Testing Agency Qualification Statement.
1.06 QUALITY ASSURANCE
A. Testing Agency Qualifications: Independent firm specializing in performing testing and inspections of the type specified in this section.
246024-001
Fill WAS Design, Inc.
312323 - 2
1.07 DELIVERY, STORAGE, AND HANDLING
A. When necessary, store materials on site in advance of need.
B. When fill materials need to be stored on site, locate stockpiles where indicated.
1. Separate differing materials with dividers or stockpile separately to prevent intermixing.
2. Prevent contamination.
3. Protect stockpiles from erosion and deterioration of materials.
PART 2 PRODUCTS
2.01 FILL MATERIALS
A. General Fill : Subsoil excavated on-site .
1. Graded.
2. Free of lumps larger than 3 inches, rocks larger than 2 inches, and debris.
3. Complying with ASTM D2487 Group Symbol CL.
B. Topsoil : Topsoil excavated on-site .
1. Unclassified .
2. Graded.
3. Free of roots, rocks larger than 1/2 inch, subsoil, debris, large weeds and foreign matter.
4. Acidity range (pH) of 5.5 to 7.5.
5. Containing a minimum of 4 percent and a maximum of 25 percent inorganic matter.
6. Complying with ASTM D2487 Group Symbol OH.
2.02 SOURCE QUALITY CONTROL
A. See Section 014000 - Quality Requirements or ALDOT specifications, for general requirements for testing and analysis of soil material.
B. Where fill materials are specified by reference to a specific standard, testing of samples for compliance will be provided before delivery to site.
C. If tests indicate materials do not meet specified requirements, change material and retest.
PART 3 EXECUTION
3.01 EXAMINATION
A. Identify required lines, levels, contours, and datum locations.
B. Verify areas to be filled are not compromised with surface or ground water.
3.02 PREPARATION
A. Scarify subgrade surface to a depth of 6 inches to identify soft spots.
B. Cut out soft areas of subgrade not capable of compaction in place. Backfill with general fill.
C. Compact subgrade to density equal to or greater than requirements for subsequent fill material.
D. Until ready to fill, maintain excavations and prevent loose soil from falling into excavation.
3.03 FILLING
A. Fill to contours and elevations indicated using unfrozen materials.
B. Employ a placement method that does not disturb or damage other work.
C. Systematically fill to allow maximum time for natural settlement. Do not fill over porous, wet, frozen or spongy subgrade surfaces.
D. Maintain optimum moisture content of fill materials to attain required compaction density.
E. Soil Fill: Place and compact material in equal continuous layers not exceeding 8 inches compacted depth.
F. Slope grade away from building minimum 2 inches in 10 feet, unless noted otherwise. Make gradual grade changes. Blend slope into level areas.
G. Correct areas that are over-excavated.
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312323 - 3
1. Use general fill, flush to required elevation, compacted to minimum 97 percent of maximum dry density.
H. Compaction Density Unless Otherwise Specified or Indicated:
1. Under paving, slabs-on-grade, and similar construction: 97 percent of maximum dry density unless otherwise directed by Geotechnical Report.
2. Landscape areas: 80 percent of maximum dry density unless otherwise directed by
Geotechnical Report.
I. Reshape and re-compact fills subjected to vehicular traffic.
J. Maintain temporary means and methods, as required, to remove all water while fill is being placed as required, or until directed by the Landscape Architect or other Owner's Representative. Remove and replace soils deemed unsuitable by classification and which are excessively moist due to lack of dewatering or surface water control.
3.04 FILL AT SPECIFIC LOCATIONS
3.05 TOLERANCES
A. Top Surface of General Filling: Plus or minus 1 inch from required elevations.
B. Top Surface of Filling Under Paved Areas: Plus or minus 1 inch from required elevations.
3.06 FIELD QUALITY CONTROL
A. See Section 014000 - Quality Requirements, for general requirements for field inspection and testing.
B. Soil Fill Materials:
1. Perform compaction density testing on compacted fill in accordance with ASTM D1556, ASTM D2167, or ASTM D6938.
2. Evaluate results in relation to compaction curve determined by testing uncompacted material in accordance with ASTM D698 ("standard Proctor"), ASTM D1557 ("modified Proctor"), or AASHTO T 180.
3. If tests indicate work does not meet specified requirements, remove work, replace and retest.
4. Frequency of Tests: Per Geotechnical report .
3.07 CLEANING
A. See Section 017419 - Construction Waste Management and Disposal, for additional requirements.
B. Remove unused stockpiled materials, leave area in a clean and neat condition. Grade stockpile area to prevent standing surface water.
C. Leave borrow areas in a clean and neat condition. Grade to prevent standing surface water.
END OF SECTION
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