8-16 Section 805. Hot Mix Asphalt Curb
805.01 Description
This work consists of conditioning and treating the surface shown on the plans for placing hot mix asphalt (HMA) curb and constructing HMA curb.
805.02 Materials
Provide materials in accordance with the following sections : HMA Mixture ......................................................................................... 501 Bond Coat SS -1h, CSS -1h.................................................................... 904 Asphalt Cement .................................................................................... 904 Construct the HMA curb with the same HMA mixture required to construct the leveling and top courses of pavement.
805.03 Construction
Construct HMA curb in accordance with subsection 501.03 and as modified by this subsection or as shown on the plans.
A.Equipment . Provide equipment in accordance with subsection 501.03.A and this subsection. Provide a self -propelled, HMA curbing machine capable of placing vertical curved and straight line curb. Equip the machine with templates for the required cross sections.
B.Bond Coat . Apply bond coat to adjacent surfaces prior to the placement of HMA curb.
C.Placing HMA Sloped Curb . Use the leveling course mixture for the first stage of sloped curb constr uction and the top course mixture for the second stage.
D.Placing HMA Vertical Curb . Rolling is not required. Compact the mixture using the curbing machine template. Provide a tight surface texture. Remove and replace curb that shows segregation, slumping, or misalignment at no additional cost to the Department. Place and compact HMA sloped curb using the curbing machine template and mainline paving equipment . Remove and replace curb that shows segregation, slumping, or misalignment at no additional cost to t he Department.
E.Backfilling. Delay backfilling until 24 hours after the placement of the HMA curb unless earlier backfill placement is approved by the Engineer . Place and compact the backfill material without disturbing the curb. MDOT Standard Specifications for Construction Section 805 8-17 805.04. Measurement and Payment Pay Item Pay Unit Curb Slp, HMA ........................................................................................... Foot Curb Vertical, HMA .................................................................................... Foot The Engineer will measure Curb Slp, HMA in place along the base of the curb face or along the flow line of the gutter with no deductions for catch basins or inlet castings . The unit price for Curb Slp, HMA includes the cost of providing and applyin g bond coat . The unit price for relevant surfacing quantities includes the cost of HMA mixture quantities. The Engineer will measure Curb Vertical, HMA in place along the base of the curb face or along the flow line of the gutter with no deductions for cat ch basins or inlet castings . The unit price for Curb Vertical, HMA includes the cost of providing and placing HMA mixture quantities and applying bond coat.
Source: Michigan Standard Specifications for Construction, 2020 Edition. Pages 577–578 of 1,146.