for Highway Construction Page 265 of 715 SECTION 410 - RESERVED for Highway Construction Page 266 of 715 SECTION 411 – URBAN CONCRETE PAVEMENT
411.01 Description.
Construct portland cement concrete pavement s as specified in 409.01.
411.02 Materials.
Provide materials and test as specified in 409.02.
411.03 Construction Requirements.
A.Proportioning. Meet the requirements as specified in 409.03.A with the following exceptions:
1.Use number 3 coarse aggregate or 3C combined aggregate gradation as specified in 703.02.
2.The Contractor may increase maximum slump to 3 inches if finishing machines that provide only surface vibration are used and 4 inches if hand methods are used.
3.The Engineer may require Type III cement where earlier pavement strengths are necessary.
B.Equipment.
1.Mixers and Hauling Equipment . Meet the requirements specified in 409.03.B.1.
2.Paving Equipment. Meet the requirements specified in 409.03.B.2.
a.Placer/Spreader. Meet the requirements specified in 409.03.B.2. a.
b.Slipform Paving. Use equipment as specified in 409.03.B.2.b.
c.Machi ne Paving with Forms . Provide forms so the constructed pavement meets the specified thickness, cross- section, grade, and alignment. Adequately support forms to prevent deflection or movement. Do not allow the top of the forms to deviate more than 1/8 inch in 10 feet and do not allow the alignment of the forms to deviate more than 3/16 inch in 10 feet . Allow the concrete to set sufficiently to withstand form removal without chipping or spalling when forms are removed the day after placement . Spray the edges of the concrete with curing compound if forms are removed before the expiration of the curing period. Clean, oil, and examine used forms for defects before they are used agai n. Use machines, or combination of machines, capable of consolidating the concrete across the full width of the placement into a uniform and homogeneous mass, without rock pockets, and without separation of mortar and aggregates. Machines may be subject t o Engineer approval. The Engineer may request a test section placed to show the equipment can satisfactorily strike off and compact the concrete to the required density, grade, and sections. The Contractor may use internal, pan, beam, or roller type vibrating units. Do not operate the vibration equipment when the machine is not in motion. Run machines to consolidate, finish to the established grade and cross -section, and establish a smooth even surface so only a very moderate amount of hand finishing is necessary.
Referenced in this section
RESERVED in other states
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Source: Idaho Standard Specifications for Highway Construction, 2023 Edition. Pages 301–301 of 768. View official source ↗