824PROCESSED REEF SHELL BASE MATERIALS

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823.03Specific Requirements

GENERAL COMPOSITION Sieve Requirements Percentage Passing By Weight {Mass} TYPE A B C 2.5 inches {63 mm} 100 100 2 inches {50 mm} 100 85-100 85-100 1 inch {25.0 mm} 85-100 50-100 50-100 3/4 inch {19.0 mm} 35-95 No. 4 {4.75 mm} 50-85 30-75 25-58* No. 8 {2.36 mm} 35-75 25-70 22-50 No. 10 {2.00 mm} 30-74 22-69 20-49 No 40 {425 µm} 12-68 6-67 6-48 No. 200 {75 µm} 4-28 3-29 3-23 Clay 2-15 2-14 2-12 Liquid Limit (LL) 26 Max. 26 Max. 26 Max. Plasticity Index (PI) 6 Max. 6 Max. 6 Max. * Retained portion must contain a minimum of 25% crushed particles. Material placed on the road found not meeting the above requirements, may in lieu of removal and replacement, be stabilized with approved materials in such proportions that the finished base will meet the above requirements. PROCESSED REEF SHELL BASE MATERIALS

824.01Description

Processed Reef Shell Base for the purpose of these Specifications is classified as a composite base course material which contains a large percentage of Processed Reef Shell blended with portions of Selected Soil, Granular Soil, Soil Aggregate, or other approved materials.

824.02General Requirements

Processed Reef Shell furnished for use shall comply with the requirements of Article 827.02 and, when combined with other material, shall produce the material complying with the designated type noted in the specific requirements provided in Article 824.03. Gradation may be obtained by the proper blending of local or other commercial materials and approximately 40% of reef shell by weight {mass} for Type A and approximately 60% reef shell by weight {mass} for Type B. Special note is made of the fact that, should the gradation run on the extreme fine or coarse side, difficulty can be expected in obtaining the modified proctor density. CRUSHED AGGREGATE BASE MATERIALS 694

824.03Specific Requirements

GENERAL COMPOSITION Sieve Requirements Percentage Passing By Weight {Mass} TYPE A B 2.5 inches {63 mm} 100 2 inches {50 mm} 100 85-100 1 inch {25.0 mm} 70-100 50-100 3/4 inch {19.0 mm} 40-95 No. 4 {4.75 mm} 25-65* No. 8 {2.36 mm} 40-70* 20-55 No. 10 {2.00 mm} 38-66 18-53 No 40 {425 µm} 5-52 No. 200 {75 µm} 4-28 2-22 Clay 10 Max. Liquid Limit (LL) 30 Max. 26 Max. Plasticity Index (PI) 10 Max. 6 Max. * NOTE: Retained portion must contain at least 75% shell particles. CRUSHED AGGREGATE BASE MATERIALS

825.01Description

Crushed Aggregate Base for the purpose of these Specifications shall consist of 100 percent crushed stone conforming to the requirements noted in this Section.

825.02General Requirements

The crushed stone furnished for use shall conform to the general requirements of Section 801 and the specific requirements noted in Article 825.03. Gradation analysis will be performed in accordance with AASHTO T 27. Gradation may be obtained by the proper mixing of certain regular ALDOT size aggregates as noted below; however, no specific gradation will be required prior to mixing operations. Type A - Approximately 75% ALDOT No. 610 with Approximately 25% ALDOT No. 8910. Type B - Approximately 50% ALDOT No. 410 with Approximately 50% ALDOT No. 810.

825.03Specific Requirements

GENERAL COMPOSITION Sieve Requirements Percentage Passing By Weight {Mass} TYPE A * B ** 2 inches {50 mm} 100 1.5 inches {37.5 mm} 90-100 1 inch {25.0 mm} 100 75-98 3/4 inch {19.0 mm} 86-100 - - - 1/2 inch {12.5 mm} - - - 55-80 No. 4 {4.75 mm} 26-55 40-70 No. 8 {2.36 mm} 15-41 28-54 No. 16 {1.18 mm} - - - 19-42 No. 50 {300 µm} 3-18 9-32 No. 200 {75 µm} 5-15 7-18 * The fraction passing the No. 40 {425 µm} sieve shall not have a liquid limit in excess of 25. ** The fraction passing the No. 40 {425 µm} sieve shall not have a P.I. in excess of 6 nor a L.L. in excess of 25, and contain not more than 2/3 by weight {mass} passing the No. 200 {75 µm} sieve.