3-1 Chapter 3 DIVISION 300 - BASES SECTION 301 Through 303 - VACANT SECTION 304 - AGGREGATE BASE AND SUBBASE COURSE
304.01 Description This work shall consist of furnishing and p lacing one or more
courses of aggregates on a prepared surface in accordance with the specifications in reasonably close conformity with the lines, grades, thickness a nd typical cross sections, as shown on the plans or established.
304.02 Aggregate Aggregates shall conform to the requirements specified in the
following subsections of Division 700 - Materials: Aggregate Base Type A & B 703.06 a Aggregate Base Type C 703.06 b Aggregate Subbase Type D & E 703.06 c Aggregate for base or subbase courses shall be material meeting the aggregate type requirements specified in the following table: Material Aggregate Type (Subsection 703.06) Base Course, Crushed 1A, B or C Subbase Course, Gravel 2D 1Will be designate d on the plans 2Subbase Course, Gravel-Type E may be used below the top 9 ” of the subbase layer at the Contractor ’s option For the various types of base and subbase, all shall conform to the gradation requirements of the contract at the time it is deposited on the roadbed. The Depart ment will obtain samples from the roadbed for Acceptance prior to compaction. Oversized stones sh all be removed from the aggregate before depositing on the r oadway. Oversized stones fo r the various types are as follows: Type A will not pass a 2 inch square mesh sieve Type B and Type C will not pass a 4 inch square mesh sieve Type D and E will not pass a 6 inch square mesh sieve.” The top 3” of Aggregate Base Course-Type C shall consist of Rec ycled Asphalt Pavement (RAP) or Untreated Aggregate Surface Course-Type B.