Intelligent Compaction rollers are used in compaction of hot mix asphalt for breakdown and intermediate compaction for method compaction process and for density required HMA. The current nssp 39-8 requires use of steel drum vibratory roller equipped with GPS, temperature sensor, accelerometer data acquisition system and displays.
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. Crack Sealing. Crack sealing is used for active cracks in asphalt pavements so that water is kept out of the pavements. Sealant installation is affected by a number of factors including: humidity, rout size, crack preparation method, heating time, sealant finishing and protection, and the temperature of air, sealant and pavement. High Temperature Indirect Tensile Test for HMA . 1. Scope 1.1. This method describes a procedure for testing laboratory prepared or plant mixed samples of Hot Mix Asphalt (HMA) for resistance to rutting via an indirect tensile method on a Marshall press. 2. Referenced Documents 2.1. AASHTO Standards MAXIMUM MIX TEMPERATURE. The hottest time in any asphalt pavement’s life is at the processing plant when it is mixed – no matter whether the product is unmodified hot mix asphalt (HMA), polymer modified HMA or cooler warm mix asphalt (WMA). 4-07.1 A typical temperature range for ATPB manufacturing would be 260-300°F for Warm Mix Asphalt (WMA) processes or 315-325°F for Hot Mix Asphalt (HMA) processing for PG 70-22ER binders. 4-07.3(2) Temperature-viscosity curves are developed for dense graded HMA mixing and compaction applications and should be used as references only.
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
a hot mix asphalt (HMA) pavement together. It is a viscoelastic material, meaning that it displays both viscous (fluid-like) and elastic (solid-like) charac-teristics. These characteristics are largely temperature dependent, as asphalt cement behaves more like a solid at low temperatures, and more like a liquid at high temperatures. Hot mix asphalt (HMA) mixture compacted at various temperature has always been a concern to researcher. Compaction below the standard compaction temperature may bring reverse effect on HMA properties. Intelligent Compaction rollers are used in compaction of hot mix asphalt for breakdown and intermediate compaction for method compaction process and for density required HMA. The current nssp 39-8 requires use of steel drum vibratory roller equipped with GPS, temperature sensor, accelerometer data acquisition system and displays. In the stage of asphalt-mixture production, the initial temperature of the raw materials is assumed as 25°C, and the mixing temperature of HMA and WMA mixtures is 180°C and 140°C, respectively. All asphalt mixtures are transported from the asphalt plant to the construction site with an assumed average distance of 10 km.
Crack Sealing. Crack sealing is used for active cracks in asphalt pavements so that water is kept out of the pavements. Sealant installation is affected by a number of factors including: humidity, rout size, crack preparation method, heating time, sealant finishing and protection, and the temperature of air, sealant and pavement.
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 Nov 06, 2002 · The research evaluated several newly developed low temperature performance tests under Nevada’s conditions. The goal of the research was to determine the applicability of the tests for characterizing the low-temperature response of Nevada’s asphalt binders and hot-mixed asphalt (HMA) mixtures.