A. Inspection and Testing. 1. Placing trench backfill and earthwork is subject to continuous inspection. a. Engineer may perform field density tests of compaction of each layer of fill following ASTM D1556, ASTM D2922, or ASTM D2937 2. Allow time for Engineer to perform tests after completion of each layer of fill in designated area. 3.
Crushed Stone 0-25 50-100 95-100 (b) Coefficient of Uniformity. Provide material with a minimum coefficient of uniformity of 4 as determined by ASTM D 2487. For select granular backfill material composed of crushed stone, submit a proposed project gradation with single-point gradations and tolerances for approval.
A. Embankment, backfill, and bridge approach embankments. 1.2 RELATED SECTIONS . A. Section 03575: Flowable Fill . 1.3 REFERENCES . A. AASHTO M 145: Classification of Soils and Soil-Aggregate Mixtures for Highway Construction Purposes . B. AASHTO T 11: Materials Finer than 75 µm (No. 200) Sieve in Mineral Aggregates by …
812.2 Materials 812.2.01 Foundation Backfill, Type I A. Requirements 1. Use natural or artificial mixtures of materials consisting of hard, durable particles of sand or stone, mixed with silt, clay and/or humus material for Type I backfill. 2. Have the final blend of material meet the requirements of Class I or II soils in Subsection 810.2.01.
crushed stone or gravel conforming to the requirements of Table 2 unless modified by the Engineer in writing. Table 2 Sanitary Sewer Backfill Materials Sewer Gravel Percent Passing 1- ½ inch sieve 100 Passing 1 inch sieve 95 to 100 Passing 1/2 inch sieve 25 to 60 Passing No. 4 sieve 0 to 10 Passing No. 8 sieve 0 to 5 6.
A. Embankment, backfill, and bridge approach embankments. 1.2 RELATED SECTIONS . A. Section 03575: Flowable Fill . 1.3 REFERENCES . A. AASHTO M 145: …
Fine crushed stone aggregates consist of particle sizes that are typically less than 3/8-inch (9 mm). Fine aggregates are used in asphalt, concrete, backfill, construction and specialty applications. Common uses for fine …
Table 1: Tests to assess recycled materials for use as select backfill ; Test: Description: AASHTO Specification : pH Determine if the material is neutral, acidic, or caustic T-288 Resistivity Indicates potential for a material to facilitate corrosion; indicates presence of dissolved salts T-289 Gradation on a received sample
Standard Specifications Utility Backfill Materials Revised January 2017 31 23 23-1 SECTION 31 23 23 UTILITY BACKFILL MATERIALS PART 1: GENERAL 1.01 SECTION INCLUDES A. Material Classifications B. Utility Backfill Materials: 1. Concrete sand 2. Gem sand 3. Pea gravel 4. Crushed stone 5. Crushed concrete 6. Bank run sand 7. …
Revise 301.2.2(1) to add crushed gravel, add natural material, and clarify crushed stone definitions. (1) Interpret these terms, used throughout part 3, as follows: Aggregate A …
materials, compacted to greater than 95% Proctor installed to the top of the pipe. G. Bedding and embedment material classifications shall be defined as follows: • CLASS I Angular, (1/4 to 1- -1/2 inch) graded stone, including a number of fill materials that have regional significance such as coral, slag, cinders, crushed stone, crushed gravel,
particles or sand-sized particles mixed with gravel, crushed gravel, or crushed stone. Do not use crushed concrete or reclaimed asphalt. (2) Ensure that the material provided has a liquid limit less than or equal to 25 and a plasticity index less than or equal to 6. The contractor may substitute type A for type B material. 210.2.2 Gradation (1 ...
AWWA, ASTM and AASHTO practices recognize the importance of proper specification and installation of bedding and backfill for achieving the intended structural performance of buried rigid and more importantly flexible pipelines. However, the guidance provided by various AWWA design manuals, specific for pipe materials, ASTM …
Secondary backfill material shall be as follows: In locations where any part of the trench pay limit (as defined on the Contract Documents) falls under existing asphaltic or PCC roadways and/or existing parking lots, the secondary backfill shall be: 1. #610 Stone material in dry trenches, 2. #57 Stone in wet trenches or in wet trench bottoms, 3.
Engineered Fill shall be a graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand meeting the requirements of ASTM D 2940; with at least 90 percent passing a 1-1/2-inch sieve and not more than 10 percent passing a No. 200 sieve. H.
The American Association of State Highway and Transportation Officials has released the 2021 edition of its Standard Specifications for Transportation Materials …
Buried pipe design requires knowledge about the fill to design the backfill structure. The interaction between the backfill envelope and the pipe impacts the structural performance of the buried pipe. The backfill material and compaction level respond to the backfill's overall strength and, therefore, for pipe-soil interaction. The strength of backfill material is …
• AASHTO (American Association of State and Highway Transportation Officials) labels aggregate specifications from 1 to 10 according to the largest stone size in the mixture, …
These materials are grouped into 5 broad categories according to their suitability for this application. 1. Class I: Angular, 0.25 inch to 1.5 inch (6 to 40 mm) graded stone, including a number of fill materials that have regional significance such as coral, slag, cinders, crushed shells and crushed stone. (Note: The size range and
B. Determine the field density of backfill in accordance with AASHTO Designation T-147. 1.04 REFERENCES AASHTO Designation T-99 AASHTO Designation T-147 ... materials such as crushed stone or rock, broken coral, crushed slag, cinders, or crushed ... Flowable Select Material conforming to ArDOT Standard Specifications, latest edition. ...
Coarse. Coarse aggregates consist of gravel, crushed stone or recycled concrete with particle sizes of ranging from 3/8-inch to 1.5 inches. Coarse aggregates are used in a wide range of construction applications, …
703.11 Structural Backfill for 603 Bedding and Backfill 703.12 ... Provide aggregate conforming to the size specified in the material specification, the construction item, or …
stone, and natural or crushed sand meeting the requirements of ASTM D 2940; with 100 percent passing a 1-inch sieve and not more than 8 percent passing a No. 200 sieve. I. Drainage Course material shall be a narrowly graded mixture of washed crushed stone, or crushed or uncrushed gravel; meeting the requirements of
812.2.01 Foundation Backfill, Type I A. Requirements 1. Use natural or artificial mixtures of materials consisting of hard, durable particles of sand or stone, mixed with silt, clay and/or humus material for Type I backfill. 2. Have the final blend of material meet the requirements of Class I or II soils in Subsection 810.2.01. B. Fabrication
Section 812—Backfill Materials Page 3 1 Crushed Stone Use a material manufactured from Class A or B stone free of soil overburden and having a soundness loss of not …
Type 1 Select Material. Type 1 select material is a natural or manufactured fine aggregate material meeting the gradation requirements of standard size 2S or 2MS in Table 1005-2 as described in Sections 1005 and 1006. Type 2 Select Material. Type 2 select material is a granular soil material meeting AASHTO M 145 for soil classification A-1 or A-3.
AWWA, ASTM and AASHTO practices recognize the importance of proper specification and installation of bedding and backfill for achieving the intended structural performance of buried rigid and more importantly flexible pipelines.
1. Review the mixture and the percentages of each material, and approve a mixture suitable for the Project. D. Materials Warranty General Provisions 101 through 150. 812.2.04 Mechanically Stabilized Embankment Backfill A. Requirements Use material comprised of crushed stone, natural sand, or a blend of crushed stone and natural sand free of soils,
aashto specifications for crushed stone as backfill materials.BACKFILLING.15.01 SCOPE: These Specifications form a part of the Contract.Materials of this Section shall …