Pay Unit
Measure to the Nearest
Sidewalk (Plant Mix) Spillway (Plant Mix)
SY [m2] FT [m]
0.1 ft [0.05 m] 0.1 ft [0.05 m]
Pay to the Nearest SY [m2] FT [m]
412.5.2 Referenced Sections for Direct Payment 1 When specified, the engineer will measure, pay and price adjust for:
Pavements.
appropriate pay item, except for plant mix used for the pay item Bike Path (Plant Mix)
329
Hydrated Lime
413.1DESCRIPTION
1 This section describes the requirements for adding dry lime to a wetted aggregate.
413.2MATERIALS
1 Provide materials in accordance with the following:
Material
Subsection
Hydrated Lime Water
820 814
413.3EQUIPMENT
1 Provide a mechanical mixing device that creates a uniform and homogeneous mixture
with all aggregate particles coated with hydrated lime as approved by the engineer. 2 Equip the mixing plant with facilities to weigh check samples and to calibrate gate
openings and metering devices. Equip with weighing or metering devices (such as a vane feeder with a calibrated revolution counter) to determine the rate of hydrated lime introduced into the aggregate while the plant is in full operation. Do not use belt scales. 3 Use
a spray bar or other approved method to wet the aggregate uniformly. Equip the plant with devices that meter the water and hydrated lime into the mixer. Interlock and synchronize the metering devices and feeders to maintain a constant rate of hydrated lime and water to the aggregate.
4 To control the daily quantity of hydrated lime added to the aggregate and to facilitate
calibration of the metering devices, place the bulk storage container from which hydrated lime is metered on scales or equip with load cells to enable the accurate measurement of the remaining weight [mass] in the container at the end of each day. Do not use strain gages. 5 Use a pug mill with a mixing chamber to mix the hydrated lime and water with
the aggregate. Keep the materials in the chamber until obtaining a uniform and homogeneous mixture of lime, water, and aggregate. Do not use devices that allow the materials to drop directly through the mixing paddles.
6 Locate the pug mill to allow inspection of the mixture during mixing and after discharge
from the mixer. Make the belt from the pug mill to the dryer accessible for sampling. Provide a template of the belt for taking a sample to determine moisture content.
330
Hydrated Lime