301.1 301.3(l) BASE COURSES
301.1DESCRIPTION—This work i s construction of a normal or high early strength plain cement concrete
base course. When placed on subgrade, it includes the preparation of subgrade, as specified in Section 210.
301.2MATERIAL —
• Class A Cement Concrete —Section 704
• High Early Strength Cement Concrete —Section 704
• Supplementary Cementitious Material (SCM) *—Section 724.2
• Expansion Joint Filler —Section 705.1
• Longitudinal Construction Joint Material —Section 705.2
• Concrete Curing Material —Sections 711.1 and 2(b) * SCM may be substituted for a portion of Portland cement.
301.3CONSTRUCTION —As specified in Section 501.3, except interpret references to "pavement" to
mean "base course," and for the following sections:
Forms are not required for base course widening 6 feet or less in width. However, use acceptable methods to contain the base course.
Where longitudinal joints are indicated or formed for convenience of construction, form a tied joint, as shown on the Standard Drawings for cement concrete pavement joints. In full width construction, sawing is not required.
Rake or broom finish the surface.
Liquid Membrane Forming Curing Compound, White, will not be allowed. Liquid Membrane Forming Curing Compound, Black, may be used, provided the cement 301.3(n) 301.4(c) use of the compound if it becomes unsatisfactory as a curing agent; resume curing by other methods, as specified.
After the concrete has hardened, retest the surface of the base course, using straightedges. Operate the straightedge as specified in Section 501.3(k)3. Remove high points in excess of 1/4 inch by means of grinding or cutting tools, as directed. Remove and replace sections containing depressions of more than 3/8 inch, when directed in writing. Remove the full width of lane in which a depression occurs, for a length of at least 10 feet.
The Representative will determine when base course may be