ITEM 204 – PORTLAND CEMENT STABILIZED ROAD MIX BASE COURSE

204.1 Description

This item shall consist of a foundation for surface course composed of soil-aggregate, Portland cement and water in proper proportions, road-mixed and constructed on a prepared subgrade/subbase in accordance with this Specification and the lines, grades and typical cross-sections shown on the Plans or as established by the Engineer.

204.2 Material Requirements

204.2.1 Soils Aggregate

It shall conform to the grading and quality requirements of Subsection 203.2.1.

204.2.2 Portland Cement

It shall conform to the requirement of Item 700, Hydraulic Cement.

204.2.3 Water

It shall conform to the requirement of Item 714, Water.

204.2.4 Proportioning of Mixture

The amount of cement to be added to the soil-aggregate shall be from 6 to 10 mass percent of the dry soil. The exact percentage to be added shall be fixed by the Engineer on the basis of preliminary laboratory tests and trial mixes of materials furnished by the Contractor.

204.2.5 Strength Requirement

Strength requirements shall conform in all respects to those specified in Subsection 203.2.5.

204.3 Construction Requirements

Construction requirements and procedures shall be as prescribed under Subsections 203.3.1 through 203.3.10. In all cases, the word “lime” shall be deleted and replaced with “Portland Cement”.

204.4 Method of Measurement

Portland Cement Stabilized Road Mix Base Course will be measured by the cubic meter (m3). The quantity to be paid for shall be the design volume compacted in-place as shown on the Plans, and accepted in the completed course. No allowance shall be given for materials placed outside the design limits shown on the cross-sections. Trial sections shall not be measured separately but shall be included in the quantity of Portland Cement Stabilized Road Mix Base Course.

204.5 Basis of Payment

The accepted quantities, measured as prescribed, in Section 204.4, shall be paid for at the contract unit price for Portland Cement Stabilized Road Mix Base Course, which price and payment shall be full compensation for furnishing and placing all materials, including all labor, equipment, tools and incidentals necessary to complete the work prescribed in this Item.

Payment will be made under:

Pay  Item Number	Description	Unit of Measurement
204	Portland Cement Stabilized Road Mix Base Course, (New or Salvaged) Soil-Aggregate	Cubic Meter