99 -- CRUSHED STONE MATERIAL

Notice Date

May 15, 2001

Contracting Office

National Capital Region, 1100 Ohio Drive, SW, Washington, DC 20242

ZIP Code

20242

Solicitation Number

Q3400010353

Response Due

June 1, 2001

Point of Contact

Linda Stivaletti Tel. (202) 619-6368

Description

This is to clarify the uniform criteria, "Mall Walk Mix", or crushed stone material, for Solicitation Number Q3400010353. They are as follows: 1. a. Sieve Analysis: 1) Sieve Size: three-quarters of an inch; Percent Passing: 100%; Specifications: 100% 2) Sieve Size: half an inch; Percent Passing: 95%; Specifications: 92-100% 3) Sieve Size: three eights of an inch; Percent Passing: 78%; Specifications: 70-85% 4) Sieve Size: #4; Percent Passing: 55%; Specifications: 48-62% 5) Sieve Size: #8; Percent Passing: 42%; Specifications: 37-49% 6) Sieve Size: #16; Percent Passing: 34%; Specifications: 28-40% 7) Sieve Size: #30; Percent Passing: 27%; Specifications: 22-32% 8) Sieve Size: #50; Percent Passing: 15%; Specifications: 10-20% 9) Sieve Size: #100; Percent Passing: 09%; Specifications: 04-14% 10) Sieve Size: #200; Percent Passing: 07%; Specifications: 04-10% AASHTO T-11 or ASTM C-117 Petrographic Analysis The term Coarse Aggregate designates aggregate retained on a #4 (4.75mm) sieve. Coarse aggregate shall be made up of Quartz/Quartzite and Quartzose. Petrograph Examination: ASTM C-295. b. Physical Characteristics of Coarse Aggregate: 1) Test: L.A. Abrasion; Results: 29% Wear; Specifications: 45% Wear Maximum 2) Test: Soundness (Sodium Sulfate); Results: 1.4% Loss; Specifications: 10% Loss Maximum 3) Test: Face Fracture; Results: 90-100%; Specifications: Minimum 1 Face 4) Test: Face Fracture; Results: 75%-100%; Specifications: Minimum 2 Face 5) Test: -#200; Results: .6%; Specifications: 1.5% Maximum 6) Test: Absorption; Results: .9%; Specifications: 1.5% Maximum c. Fine Aggregate: Natural sand, silica sand passing #4 sieve and retained on the #200 sieve free of organic matter and light in color shown by the colorimetric Test T-21, AASHTO designation, from approved source and graded as follows: d. Clay: Material with a plasticity index greater than twelve (12) and with 100% passing the 200 sieve and consistent in color. e. Mix: The prepared crushed gravel, sand, clay, and water must be thoroughly mixed in a mechanical mixer. It then must be stockpiled in such a manner to preserve the semi-slurry state necessary for compaction and congealment.

Record

Loren Data Corp. 20010516/99SOL004.HTM (W-134 SN50M0L5)