1108 - AGGREGATES FOR COVER MATERIAL 1100-25
1108.1 Description
This specification covers aggregates for cover material to be used for asphalt sealing of the type shown in the Contract Documents for each project.
1108.2 Requirements
a. Composition. Provide sand-gravel, lightweight aggregate, crushed limestone, crushed sandstone, crushed or uncrushed gravel for cover material. Use expanded shale as lightweight aggregate. b. Quality Requirements. Soundness, minimum (KTMR-21) ................................................................ 0.90 Wear, Maximum (AASHTO T 96) Sand-gravel, Gravel or Limestone ........................................................... 40% Sandstone ................................................................................................ 45% Lightweight aggregate ............................................................................. 30% Absorption, maximum (KT-6, Procedure I) ................................................... 4.0% (All types except CM-L) c. Product Control.
1.Size Requirements. Use various size cover material that comply with TABLE 1108-1. Determine the gradation factor according to Part V, Section 5.10.5-Fineness Modulus of Aggregates (Gradation Factor).
2.Deleterious Substances. Do not exceed th e following deleterious substances by weight: Shale or Shale like material (KT-8) ............................................................... 1.5% Clay lumps and friable particles (KT-7) ......................................................... 1.5% Coal (AASHTO T-113) .................................................................................. 0.5% Sticks (wet) (KT-35) ...................................................................................... 0.1% Sum of all deleterious ...................................................................................... 2.0% TABLE 1108-1: GRADATION REQUIREMENTS FOR AGGREGATES FOR COVER MATERIAL Type Composition Percent Retained-Square Mesh Sieves* Minimum Gradation Factor ¾” ½” 3/8” No. 4 No. 8 No. 50 No. 200 CM-A Sand-Gravel 0 0-20 30-100 85-100 98-100 CM-B Sand-Gravel 0 0-25 35-100 90-100 98-100 4.00 CM-C Crushed Stone 0 0-12 40-100 95-100 98-100 CM-D Crushed Sandstone 0 0-5 15-35 70-100 95-100 98-100 CM-G Sand-Gravel, or Crushed Sandstone 0 0-15 45-100 95-100 99-100 CM-H** Crushed Stone 0 0-5 40-100 90-100 98-100 CM-J** Sand-Gravel 0 1-20 30-100 90-100 96-100 CM-K Crushed Limestone 0 0-5 15-35 70-100 95-100 98-100 CM-L-1 Lightweight Aggregate 0 0 0-10 10-40 85-100 98-100 CM-L-2 Lightweight Aggregate 0 0-5 0-15 70-100 90-100 98-100 CM-L-3 Lightweight Aggregate 0-15 0-60 65-100 95-100 98-100 *After removal of all deleterious substances. **Do not specify Types CM-H and CM-J for Federal Aid projects. 1108 - AGGREGATES FOR COVER MATERIAL 1100-26 d. Stockpiling. Stockpile and handle aggregates in such a manner to prevent detrimental degradation and segregation, the incorporation of appreciable amounts of foreign material, and the intermingling of stockpiled materials.
1108.3 Test Methods
Test aggregates according to the applicable provisions of SECTION 1115.
1108.4 Prequalification
Prequalify aggregate sources according to subsection 1101.4.
1108.5 Basis of Acceptance
Aggregates covered by this subsection are accepted based on the procedures described in subsection 1101.5.
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Source: Standard Specifications for State Road and Bridge Construction, 2015 Edition. Pages 682–683 of 978. View official source ↗