Technical_Exhibit_C_-_Flexible_Base_Material _W9-1151-16-B-0025 _24_Aug_16.pdf

TECHNICAL EXHIBIT C

FLEXIBLE BASE MATERIAL (IN-PLACE, COMPACTED)

1. DESCRIPTION

Specification used to supply and install Flexible Base Material (In-Place, Compacted).

References: The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by basic designation only.

AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)

ASTM C 29 (2007) Unit Weight and Voids in Aggregate

ASTM C 127 (2012) Density, Relative Density (Specific Gravity), and Absorption of Coarse

ASTM C 128 (2012) Density, Relative Density (Specific Gravity), and Absorption of Fine

ASTM C 131 (2014) Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine

ASTM C 136 (2006) Sieve Analysis of Fine and Coarse Aggregates

ASTM D 75 (2014) Sampling Aggregates

ASTM D 422 (1963; R 2007, E 2014) Particle-Size Analysis of Soils

ASTM D 1557, Method C (2012) Laboratory Compaction Characteristics of Soil

ASTM D 4318 (2010; E 2014) Liquid Limit, Plastic Limit, and Plasticity Index of Soils

ASTM E 11 (2013) Wire-Cloth Sieves for Testing Purposes

TEXAS DEPARTMENT OF TRANSPORTATION STANDARD SPECIFICATION FOR

CONSTRUCTION OF HIGHWAY, STREETS AND BRIDGES (2004)

2. MATERIALS

Aggregates: Aggregates shall consist of crushed stone or slag, crushed gravel, angular sand, or other approved materials. Aggregates shall be durable and sound, free from lumps of clay, organic matter, objectionable coatings, and other foreign material. Material retained on a No. 4 sieve shall be known as coarse aggregate and that passing the No. 4 sieve shall be known as binder material.

Coarse Aggregates, consisting of angular fragments of uniform density and quality, shall have a percentage of wear not to exceed 50 percent after 500 revolutions when tested in accordance with ASTM C 131. The amount of flat and elongated particles shall not exceed 30 percent. A flat particle is one having a ratio of width to thickness greater than 3, and an elongated particle is one having a ratio of length to width greater than 3.

Crushed Gravel - Crushed gravel shall be manufactured from gravel particles 50 percent of which by weight are retained on the maximum size gradation sieve specified.

Crushed Stone - Crushed stone retained on each sieve specified shall contain at least 50 percent by weight of crushed pieces having two or more freshly fractured faces with the area of each face being at least equal to 75 percent of the smallest mid-sectional area of the piece. When two fractures are adjacent, the angle between the planes of the fractures must be at least 30 degrees to count as two fractured faces.

Slag shall be an air-cooled blast-furnace product having a dry unit weight of not less than 65 pcf.

Binder Material: Binder material shall consist of screenings, angular sand, or other finely divided mineral matter processed or naturally combined with the coarse aggregate. Liquid-limit and plasticity-index requirements shall apply to any component that is blended to meet the required gradation and shall also apply to the completed course. The portion of any component or of the completed course passing the No. 40 sieve shall be either non-plastic or have a liquid limit not greater than 25 and a plasticity index not greater than 5.

Gradation:

DESCRIPTION (PERCENT RETAINED-SIEVE)

P.I.

2" 1-3/4" 1-1/2" #4 #40 MAX MIN

FLEX BASE 0 0 0-5 45-75 70-85 12 4

This material shall be produced from a source which when tested in accordance with test method TEX-117-E, Part 1, shall meet the following triaxial class requirements:

I.H. = Class 1.0

U.S. = Class 2.0

F.M. = Class 2.3

This material shall be produced from a source which when tested in accordance to test method TEX-116-E, the maximum wet ball mill value shall not exceed 45 and the maximum increase of material passing the No. 40 sieve shall not exceed 20 percent.

Job control samples for Gradation and P.I. testing shall be taken from the windrow after blade mixing.

3. EQUIPMENT

Provide machinery, tools, and equipment necessary for proper execution of the work. Provide rollers in accordance with Item 210, “Rolling.”

Provide proof rollers in accordance with Item 216, “Proof Rolling,” when required.

4. CONSTRUCTION OR WORK METHODS

Placement: Construct each layer uniformly, free of loose or segregated areas, and with the required density and moisture content. No layer shall be more than 6 inches in depth when final compaction is achieved.

Curing: Cure the finished section until the moisture content is at least 2 percentage points below optimum or as directed before applying the next successive course or prime coat.

Degree of Compaction: Degree of compaction required is expressed as a percentage of the maximum density obtained by the test procedure presented in ASTM D 1557, Method C abbreviated hereinafter as percent laboratory maximum density. All compaction should reach a minimum at 95% with 100% being optimum. Each lift shall not exceed 6 inches and pass testing requirements before a new lift is placed.

Submittals, Sampling and Test Guide: See specification section CC Submittals Procedures and the following.

General Requirements: Sampling and testing shall be performed by an approved commercial testing laboratory or by facilities furnished by the contractor. No work requiring testing shall be permitted until the facilities have been inspected and approved. The first inspection shall be at the expense of the Government. Cost incurred for any subsequent inspection required because of failure of the facilities to pass the first inspection will be charged to the Contractor. Tests shall be performed in sufficient numbers to insure that materials meet the specified requirements.

Test Reports: Results of laboratory tests for quality control purposes shall be submitted to the Contracting Officer and approved prior to using the material. Sources of all materials shall be selected well in advance of the time that materials will be required in the work. Test results from samples shall be submitted for approval not less than 15 days before material is required for the work.

Test Results: Results shall verify that materials comply with this specification. When a material source is changed, the new material shall be tested for compliance. When deficiencies are found, the initial analysis shall be repeated and the material already placed shall be retested to determine the extent of the unacceptable material. All in-place unacceptable material shall be replaced or modified as directed.

Sampling: Aggregate sample for laboratory tests shall be taken in accordance with ASTM D 75. Sampling shall be performed at the rates specified below per contract, not per task order, or on material source change.

Sieve Analysis: Before and after placing.

Before work is started, at least one sample of material to be placed shall be tested in accordance with ASTM C 136 and ASTM D 422 on sieves conforming to ASTM E 11. After the initial test, a minimum of one analysis shall be performed for each 10,000 cubic yards or change in material.

After compaction of the material, a field sample shall be tested in accordance with ASTM C 136 and ASTM D 422 on sieves conforming to ASTM E 11. A minimum of one in-place sieve analysis shall be performed for each 10,000 cubic yards or change in material.

Liquid Limit and Plasticity Index: One liquid limit and plasticity index shall be performed for each sieve analysis before placing.

Liquid limit and plasticity index shall be analyzed before placing.

Liquid limit and plasticity index shall be in accordance with ASTM D 4318.

Laboratory Density: Tests shall provide a moisture-density relationship for the aggregate. Tests shall be conducted in accordance with ASTM D 1557, Method C. A minimum of one test per 10,000 Cubic Yards of material placed or change in material.

Weight Per Cubic Foot of Slag: Weight per cubic foot of slag shall be determined in accordance with ASTM C 29. A minimum of one test per 10,000 Cubic Yards of material placed or change in material.

Wear Tests: Wear tests shall be performed in accordance with ASTM C

131. A minimum of one test per 10,000 Cubic Yards of material placed or change in material.

Wet Ball Test: Wet Ball Test shall be performed in accordance with TEX-116-E. A minimum of one test per 10,000 cubic yards of material placed or change in material.

Sampling and Testing During Construction: Quality control sampling and testing during construction shall be performed as specified in Section 202 Compact and Fine Grade Soil.

Waybills and Delivery Tickets: 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 furnished for all aggregates actually used in the construction.

Stockpiling Materials: Materials, including approved material available from excavation and grading, shall be stockpiled in the manner and at locations designated. Before stockpiling of material, storage sites shall be cleared, and sloped to drain. Materials obtained from different sources shall be stockpiled separately.