Spec for CW Rock.pdf

CRAWERWAY ROCK Spec Number

SECTION 32 15 00 Page 178

SECTION 32 15 00

AGGREGATES

PART 1 GENERAL

1.1 REFERENCES

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 T 2 (1991; R 2006) Standard Method of Test for

Sampling of Aggregates (same as ASTM D75)

AASHTO T 87 (1986; R 2008) Standard Method of Test for Dry Preparation of Disturbed Soil and Soil Aggregate Samples for Test

ASTM INTERNATIONAL (ASTM)

ASTM C 136 (2006) Standard Test Method for Sieve

Analysis of Fine and Coarse Aggregates

ASTM C 535 (2009) Standard Test Method for Resistance to Degradation of Large-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine

ASTM C 702 (1998; R 2003) Standard Practice for

Reducing Samples of Aggregate to Testing Size

ASTM C 88 (2005) Standard Test Method for Soundness of Aggregates by Use of Sodium Sulfate or Magnesium Sulfate

ASTM D 3740 (2008) Minimum Requirements for Agencies

Engaged in the Testing and/or Inspection of Soil and Rock as Used in Engineering Design and Construction

ASTM D 422 (1963; R 2007) Particle-Size Analysis of

Soils

ASTM D 75 (2009) Standard Practice for Sampling Aggregates

ASTM E 11 (2009) Wire Cloth and Sieves for Testing

Purposes

SECTION 32 15 00 Page 179

GEOSCIENCE WORLD (GSW)

Krumbein Scale (1941) Krumbein, W.C. Measurement and Geological Significance of Shape and Roundness of Sedimentary Particles. J.

Sed. Pet. 11, 1941, No. 2. pp 64-72

Rittenhouse Scale (1943) Rittenhouse, G. A Visual Method of

Estimating Two-Dimentional Sphericity. J.

Sed. Pet., 13, 1943, No. 2. pp 79-81

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval. Submit the following in accordance with Section 01 33 00

SUBMITTAL PROCEDURES:

SD-03 Product Data

Gravel Samples; G

Submit gravel samples in accordance with paragraph entitled "Sampling."

Equipment

List of proposed equipment to be used in performance of construction work including descriptive data.

Waybills and Delivery Tickets

Copies of waybills and delivery tickets during the progress of the work.

SD-06 Test Reports

Sampling and Testing; G Thickness Control; G

SD-07 Certificates

Certificate of Compliance; G

1.3 QUALITY ASSURANCE

Sampling and testing shall be the responsibility of the Contractor.

Sampling and testing shall be performed by an approved commercial testing laboratory or by the Contractor, subject to approval by the Contracting Officers Representative (COR). If the Contractor elects to establish its own testing facilities, approval of such facilities will be based on compliance with ASTM D 3740. No work requiring testing will be permitted until the Contractor's facilities have been inspected and approved. The Government may elect to perform additional testing to verify conformance to the specification requirements.

1.3.1 Sampling

Natural river gravel shall be tested by the Contractor as indicated in TABLE 1 and copies of the Test Reports with Certificate of Compliance for

SECTION 32 15 00 Page 180 the requirements shown in paragraph entitled "Aggregates" of this Section shall be submitted before material delivery. The test reports shall include the gravel source name and location. Submit 400-pound gravel samples of each size gravel and each source with the initial test reports.

TABLE 1

MATERIAL REQUIREMENT TEST METHOD SOIL MATERIAL

TESTED AND NUMBER

OF TESTS

Surface course material

Sampling AASHTO T 2

ASTM D 75

One for each 1,000 tons of material

Surface course material

Preparation of samples

AASHTO T 87

ASTM C 702

One for each 1,000 tons of material

Surface course material

Sieve analysis of fine and coarse aggregate

ASTM C 136 One for each 1,000 tons of material

Surface course material

Magnesium sulfate soundness test

ASTM C 88 One for each 1,000 tons of material

Surface course material

Resistance to abrasion of large-size coarse aggregates

ASTM C 535 One for each 1,000 tons of material

Surface course material

Hardness on MOHS Scale

Dana's Manual of Mineralogy

One for each 1,000 tons of material

Surface course material

Roundness Krumbein Scale* One for each 1,000 tons of material

Surface course material

Sphericity Rittenhouse Scale* One for each 1,000 tons of material

* The Krumbein and Rittenhouse Scale test methods are available from the Contracting Officer upon request.

1.3.2 Testing

1.3.2.1 Gradation

Make aggregate gradation in conformance with ASTM C 136 and ASTM D 422.

Sieves shall conform to ASTM E 11.

1.3.3 Equipment

All plant, equipment, and tools used in the performance of the work covered by this section will be subject to approval by the Contracting Officer before the work is started and shall be maintained in satisfactory working condition at all times. The equipment shall be adequate and shall have the capability of producing the required compaction, and meeting the grade

SECTION 32 15 00 Page 181 controls, thickness controls, and smoothness requirements set forth herein.

1.4 WAYBILLS AND DELIVERY TICKETS

During progress of work and before the final statement is submitted, the Contractor shall file all certified waybills and certified delivery tickets for all aggregates delivered, as specified in the Submittals paragraph.

PART 2 PRODUCTS

2.1 AGGREGATES

Aggregates shall consist of clean, sound, durable natural quartzite river gravel. The Contractor shall be responsible for obtaining materials that meet the requirements specified. Provide aggregates free from lumps and balls of clay, organic matter, objectionable coatings, and other foreign materials.

Aggregate shall be particles of uniform density. Coarse aggregate shall have a loss not greater than 3 percent weighted average at five cycles when tested for soundness in magnesium sulfate in accordance with ASTM C 88.

ASTM Size #4 aggregate shall have a percentage of loss not to exceed 45 after 1,000 revolutions using ASTM C 535. ASTM modified Size #3 aggregate shall have a percentage of loss not to exceed 35 after 1,000 revolutions using ASTM C 535. Aggregate shall have a hardness on the MOHS Scale of 7 or greater. The aggregate shall be rounded to well-rounded and contain not less than 50 percent of the particles having a visual roundness of at least

0.5 on the Krumbein Scale and a two-dimensional visual sphericity of not less than 0.83 on the Rittenhouse Scale. At least 50 particles per sample shall be compared to the drawings of the Krumbein and Rittenhouse Scales that have been enlarged to match the individual particle's size. When using the Krumbein and Rittenhouse Scales, the particle shall be oriented so that the largest projection plane of the particle is viewed as described in the Krumbein method. When aggregate is supplied from more than one source, aggregate from each source shall meet the requirements set forth.

The selected requirements shall be mandatory for the entire job.

2.1.1 Gradation Requirements

Gradation requirements specified in TABLE 2 shall apply to all delivered aggregate. It is the responsibility of the Contractor to obtain materials that will meet the gradation requirements after mixing, placing, compacting, and other operations.

Aggregates shall have a maximum size of 2-1/2 inches and be graded continuously within the limits specified below. Sieves shall conform to

ASTM E 11.

SECTION 32 15 00 Page 182

TABLE 2

SIEVE DESIGNATION PREFERRED CRAWLERWAY

ROCK

(ASTM SIZE #4)

ALTERNATE CRAWLERWAY

ROCK

(ASTM SIZE #3 MODIFIED)

2-1/2 inch 100

2 inch 100 95 to 100

1-1/2 inch 90 to 100 35 to 70

1 inch 20 to 55 0 to 15

3/4 inch 0 to 15 ---

1/2 inch --- 0 to 5

3/8 inch 0 to 5 ---

The above values are based on aggregates of uniform specific gravity.

Percentages passing the various sieves may require appropriate correction when aggregates of varying specific gravities are used.

PART 3 EXECUTION

3.1 STOCKPILING AND HANDLING MATERIALS

Stockpile formations and sampling requirements, and handling of river gravel shall be in accordance with the FDOT District 7 Aggregate Control Program Stockpile Sampling Procedures and ASTM D 75. The FDOT District 7 Stockpile Sampling Procedures are available from the Contracting Officer upon request. Contractor shall avoid stockpiling material multiple times.

Material shall be placed as directed by the COR and DARCY manager. The pile shall not be pushed up by bulldozers. Tires shall not be run up the pile to increase the height or rework the pile. Stockpile shall be built to the lowest reach of the equipment used and then as the stockpile is built up material shall not be dropped further than 5 feet. The maximum drop height of river gravel from conveyor and front loader shall not exceed 5 feet. Prior to stockpiling the material, clear and level the storage sites. All materials, including approved material available from excavation and grading, shall be stockpiled in the manner and at the locations designated. Stockpile aggregates in such a manner that will prevent segregation. Aggregates obtained from different sources shall be stockpiled separately.

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