![]() ![]() SMA is generally more expensive than a typical dense-graded HMA because it requires more durable aggregates, higher asphalt content, modified asphalt binder and fibers. ![]() Since aggregates do not deform as much as asphalt binder under load, this stone-on-stone contact greatly reduces rutting. The mix design goal is to create stone-on-stone contact within the mixture. Stone matrix asphalt (SMA), sometimes called stone mastic asphalt, is a gap-graded HMA originally developed in Europe to maximize rutting resistance and durability. Information: Particulars about dense-graded HMA are covered by the rest of this Guide. Materials: Well-graded aggregate, asphalt binder (with or without modifiers), RAP Works well for structural, friction, leveling and patching needs. Purpose: Suitable for all pavement layers and for all traffic conditions. Figure 1: Dense-Graded HMA Up Close Figure 2: Dense-Graded Cores Figure 3. Fine-graded mixes have more fine and sand sized particles than coarse-graded mixes. Dense-graded mixes are generally referred to by their nominal maximum aggregate size and can further be classified as either fine-graded or coarse-graded. When properly designed and constructed, a dense-graded mix is relatively impermeable. Dense-Graded MixesĪ dense-graded mix is a well-graded HMA intended for general use. Reclaimed asphalt pavement ( RAP) is generally considered a material within HMA, while forms of in-place recycling are considered separately. Typically agencies consider other types of asphalt-based pavement surfaces such as fog seals, slurry seals and BSTs to be maintenance treatments and are therefore covered in the Maintenance & Rehabilitation section. HMA is distinguished by its design and production methods (as described in this Guide) and includes traditional dense-graded mixes as well as stone matrix asphalt (SMA) and various open-graded HMAs. For clarity, this Guide makes a conscious effort to consistently refer to this material as HMA. Hot mix asphalt is known by many different names such as hot mix, asphalt concrete (AC or ACP), asphalt, blacktop or bitumen. POLYMERIZED HOT-MIX ASPHALT SURFACE COURSE, STONE MATRIX ASPHALT, 9.The most common type of flexible pavement surfacing in the U.S. POLYMERIZED HOT-MIX ASPHALT BINDER COURSE, STONE MATRIX ASPHALT 9.5, N80 HOT-MIX ASPHALT SURFACE COURSE, IL-9.5, MIX "E", N70 HOT-MIX ASPHALT SURFACE COURSE, IL-9.5, MIX "C", N50 HOT-MIX ASPHALT BINDER COURSE, IL- 9.5, N50 HOT-MIX ASPHALT SURFACE REMOVAL - BUTT JOINT POLYMERIZED BITUMINOUS MATERIALS (TACK COAT) TOPSOIL FURNISH AND PLACE, VARIABLE DEPTH Please clarify the correct quantity and revise plan sheets and export file as necessary. The items export (electronic bid file) quantity is also still listed as 9,830 Lbs. 16) to 9,090 Lbs, but the quantity shown on the Total Bill of Materials for the bridge on Sheet No. Addendum A changed the quantity of the Structural Steel Repair shown on the Summary of Quantities Sheets (Sheet No.The schedule of Quantities sheets were changed to update the Erosion Control Blanket quantities, Maintenance of Traffic sheets were revised to add critical mainline patching to " “Work to be Done Prior to Staging” and “Stage 1” and SOQ sheets have the bubbling to identify the changes made on them.Īlthough the plan sheet changes were not identified on the addendum sheets, the Contractor is responsible for reviewing the addendum and bidding according to the published plans and specs which includes all the addenda that were published. Many of the sheet revisions were simply to update the section number in the title block. ![]()
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