Dec 08, 2003 · Hot Mix Asphalt Develops and maintains statewide Hot Mix Asphalt (HMA) related policies, procedures and specifications for directing implementation of the statewide HMA mixtures program. Inspects and approves hot mix asphalt plants, maintains approved lists for truck bed release agents, warm mix technologies, and reclaimed asphalt shingle
HMA specifications (Items 341, 342, 344, 346, 347, and 348) offer contractor incentives to use this imaging technique by eliminating the contractor’s requirement to run density profiles (not applicable for Items 347, 348), and by relaxing the placement temperature requirements. than the minimum laydown temperature for AC nor higher than 350º F (175º C) or the manufacturer’s recommendations for polymer modified asphalt (i.e., PG 76-22 and PG 70-28). Additionally, not more than one of the four additional temperature readingsmay be outside of specification limits for the load to be accepted for use on the project. Enter a temperature that you would like and choose your units: What the temperature feels like to your body: Fahrenheit Celsius ° F: Enter your relative humidity: HOT MIX ASPHALT (HMA) MIX DESIGN LABORATORY QUALIFICATIONS 2 (Revised: 01/21/2020) A copy of the AMRL inspection report and any responses to deficiencies are to be sent to: Michigan Department of Transportation Construction Field Services Bituminous Mix Design Unit P.O. Box 30050 Lansing, Michigan 48909 3.
About Hot Mix Asphalt Construction Every year, the State of California invests millions of dollars in construction of hot mixed asphalt (HMA), previously known as Asphalt Concrete (AC), pavement. Producing high quality HMA pavement requires a good partnership between Caltrans, the plant producing the HMA material and the contractor placing the HMA.
Hot mix asphalt may be placed only when weather conditions are favorable. Placing the mix on a cold surface or when the air temperature is low causes the mix to cool too quickly. No mixture may be placed on a frozen subgrade. QC/QA HMA courses of less than 138 lb/yd 2 and SMA Feb 06, 2018 · Whenever the temperature of the previously placed mats falls below 170°F prior to placement of the adjacent mat, or when placing base mix and the air temperature is below 50°F, the vertical edges of the initial mat shall be coated with HMA bond coat material before the mixture is placed in the adjacent section.
EFFECTS OF RE-HEATING AND COMPACTION TEMPERATURE ON HOT MIX ASPHALT VOLUMETRICS Michael H. Huner and E.R. Brown INTRODUCTION In the hot mix asphalt (HMA) construction industry, the need for accurate, consistent volumetric measurements has recently become more important. Since more states are relying on volumetric
Hot melt adhesive (HMA), also known as hot glue, is a form of thermoplastic adhesive that is commonly sold as solid cylindrical sticks of various diameters designed to be applied using a hot glue gun.