1110 - AGGREGATES FOR SUBGRADE MODIFICATION OR RECONSTRUCTION 1100-28
1110.1 Description
This specification covers the required types of aggregates for use in subgrade modification or reconstruction operations as shown in the Contract Documents.
1110.2 Requirements
a. Composition. Provide one of the types of aggregate for subgrade modification or reconstruction as shown in TABLE 1110-1. b. Quality1. Soundness2, minimum (KTMR-21) ............................................................... 0.85 Wear3, maximum (AASHTO T 96) ............................................................... 50% 1Crushed aggregates with less than 10% material retained on the No. 4 sieve (excluding mineral filler supplements) must be produced from a source complying with the official quality requirements of this Section prior to crushing. 2The above requirements for soundness do not apply for aggregates having less than 10% material retained on the No. 4 sieve. 3The above requirements for wear do not apply to aggregates having less than 10% material retained on the No. 8 sieve. c. Product Control.
1.Size and Plasticity. Provide aggregate that complies with TABLE 1110-1 . Determine the grading factor in accordance with the proced ures listed in Part V, Section 5.10.5-Fineness Modulus of Aggregates (Gradation Factor). TABLE 1110-1: GRADING AND PLASTICITY REQUIREMENTS Type Material Percent Retained-Square Mesh Sieves1 Plasticity Index2 1 ½” 1” ¾” 3/8” No. 4 No. 16 No. 50 No. 200 SR-1 Crushed Stone 0 0-15 35-100 85-100 85-100 0-6 SR-3 Crushed Stone Screenings3 0 0-5 85-100 0-5 SR-4 Sand-Gravel 4 0 0-5 0-20 85-100 0-6 SR-7 Sand-Gravel 0 5-50 85-100 85-100 0-6 1After removal of all deleterious substances. 2This requirement does not apply if there is more than 70% retained on the No. 30 sieve. 3Do not exceed 7% of moisture contained in the aggregate when delivered to the road. 4Grading Factor is between 4.00-5.00.
2.Deleterious Substances. Do not exceed the followi ng percentages of deleterious substances by weight: For crushed stone and sand-gravel: Shale or shalelike material (KT-8) ................................................................. 3.0 Clay lumps & friable material (KT-7) ............................................................ 3.0 Sticks (wet) (KT-35) ....................................................................................... 1.0 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.
1110.3 Test Methods
Test aggregates according to the applicable provisions of SECTION 1115. 1110 - AGGREGATES FOR SUBGRADE MODIFICATION OR RECONSTRUCTION 1100-29
1110.4 Prequalification
Prequalify aggregate sources according to subsection 1101.4.
1110.5 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 685–686 of 978. View official source ↗