Asphalt Placement Temperature

FHWA Hot Mix Asphalt Pavement Guidelines

factors such as mix temperature (165 °C is the maximum), rolling trains, patterns, or passes References: Hot Mix Asphalt Construction, Participant Manual for NHI Course 13132 (placement, inspection and supply) The contractor should present the paving

Frequently Ask Questions | Asphalt Enterprises Atlanta, GA

Also, the placement cannot begin until the minimum temperature is in accordance with the following table The temperature must be checked in the shade, away from artificial light Please also keep in mind that wind chill must also be taken into account, since cold winds will cool asphalt quicker before and during placement

Asphalt Pavement Construction - Asphalt InstituteAsphalt

Mix temperature is dependent on the grade of asphalt used in the mix: Less viscous asphalt requires lower temperatures, while more viscous asphalt requiers higher temperatures At the start of a mix design, target temperatures are specified for proper mixing and compaction

Why Tracking Temperatures is Key to Successful Asphalt Paving

Air temperature is a factor in cooling hot mix asphalt pavement, but the base or ground temperature is more critical The second step is base or ground temperature


HOT MIX ASPHALT - GENERAL CONSTRUCTION REQUIREMENTS 330-1 Description This Section specifies the basic equipment and construction requirements for hot mix asphalt (including warm mix asphalt) pavements and bases Establish and maintain a quality control system that provides assurance that all materials, products and completed construction


HOT MIX ASPHALT SECTION 401 - PLANT PRODUCTION 401-1 DESCRIPTION The contractor is responsible for Quality Control (QC) QC is defined as all Temperature Range P oC 110-150 110-150 120-165 NOTES: 1 All aggregate percentages are based on the total weight of the aggregate

Warm Mix Asphalt for Cold Weather Paving - wsdotwagov

asphalt (WMA) to reduce the high mixing temperatures of regular hot mix asphalt (HMA) Its benefits are reduction in energy consumption during production and reduced emissions during production and …

Pavement Manual: Placement

Mix placement involves any equipment or procedures used to place the delivered HMA on the desired surface at the desired thickness Mix placement can involve complicated asphalt paver operations or simple manual shoveling


Guidance on Minimum Roadway Placement Temperatures asphalt Stone matrix asphalt (SMA) and permeable friction course (PFC) mixes represent the extreme case since they require that the roadway surface temperature be 70°F or higher, unless otherwise approved prior to paving

What is the temperature of asphalt at the time of lying

Thanks for your great contribution Agreed with all Experts specially With Mr Yaqoob and Mr Wolf that each region has a different allowable temperature of asphalt at the time of lying about300 °F (roughly150 °C) for virgin asphalt and330 °F (166 °C) for polymer modified asphalt, and the …

ASPHALT MAN – Colorado Asphalt Pavement Association

Specifications often refer to the CDOT temperature specification (401-3) when deciding if Asphalt Placement should or can occur in a cold weather situation The CDOT specification provides ranges of allowable temperatures depending on the situation

FLEXIBLE PAVING - coloradogov

2 Grade dependent on temperature during placement 3 Submit mix designs for review and acceptance by Town B Submit mix design giving unit weight and to meet following requirements prior to placement of asphalt:

Using Warm Mix Technology to Improve Applications of

The warm mix technology could reduce the temperature of asphalt rubber placement and thus reduce the emissions to meet the California air quality requirement The paper includes a brief literature review and a survey of users of WMA in the United States

How to Successfully Achieve Cold Weather Asphalt Paving

Understanding that compaction is directly related to the mix temperature, it’s necessary to maintain a high mix temperature during production, transportation and placement of the hot-mix asphalt

LTPP Guide to Asphalt Temperature Prediction and Correction

LTPP Guide to Asphalt Temperature Prediction and Correction From the public's perspective, the most important basic purpose of a roadway pavement is to provide a smooth safe ride For a pavement to accomplish this purpose it must be durable, and it is the responsibility of pavement engineers to ensure that pavements are designed and

Best Practices for Cold Weather Paving

If a thin lift of asphalt is placed on cool or cold surfaces the temperature is drawn out very quickly when placing thin lifts By increasing the lift thickness from 15” to 3”, the mat will cool slower as not as much heat is drawn out into the subsurface area and the invective action of the asphalt will hold heat longer, thus allowing the

Asphalt Paving Operation - Purdue Engineering

(Placement and Compaction of Asphalt Mixtures, 1982) Laboratory and Field Pavement Stability Tests The American Association of State Highway Officials (AASHO) and the American Society for Testing and Materials (ASTM) are two agencies which set forth …

Warm Mix Asphalt (WMA) Guide Specification for Highway

specification requirements and is workable at the minimum placement and compaction temperature desired, regardless of storage or haul distance considerations 1 Asphalt Mixing Plant Meet AASHTO M 156 or [as further modified by the Agency] Modify the asphalt mixing plant as required by the manufacturer to introduce the WMA technology

Asphalt | Materials Testing and Inspection

Asphalt Placement - Monitoring and/or establishing a rolling pattern to determine compaction procedures, perform in-place densities, and monitor lay-down temperature Obtain core samples to determine mat thickness and unit weight in order to correlate the nuclear densometer

Asphalt concrete - Wikipedia

Asphalt concrete (commonly called asphalt, blacktop, or pavement in North America, and tarmac, bitumen macadam or rolled asphalt in the United Kingdom and the Republic of Ireland) is a composite material commonly used to surface roads, parking lots, airports, as …

Temperature, Temperature, Temperature | MN Asphalt

The purpose of this article is to discuss the importance of temperature, temperature and temperature on the ability of a contractor to obtain density in an asphalt concrete mixture when placed on the roadway It is often stated, quite correctly, that density is the most important factor that affects the long-term performance of an asphalt pavement

7 Mix Placement and Compaction - INgov

7 Mix Placement and Compaction Weather Limitations Asphalt Materials Prime Coats Tack Coats Base Seals Fog Seals Joint Adhesive Distributors Mixture Transportation Haul Trucks Material Transfer Vehicles Mix Temperature and Appearance Placement of Mixture Pavers Paver Operation Start-Up Alignment Grade and Slope Control Transverse Joints

Inspection Checklist - Asphalt Pavement Inspection Procedures

INSPECTION CHECKLIST ASPHALT PAVEMENT INSPECTION PROCEDURES (Cont’d) Code Requirements Code section Req’d Page 3 of 4 1/1/2011 S:\BUILDING INSP\Inspection checklist-PW\Update\Asphalt Pavement Inspection Proceduresdoc d Loads shall be tarped on trucks to maintain the specific temperature (especially in cold weather) e

Compacting Hot-Mix Asphalt Pavements: Part I | Roads & Bridges

from the laydown temperature to the cutoff temperature of 175 F On the same 40 F day, with the same base temperature and for the same mix laydown temperature of 250 F, a 1-in thick HMA layer will cool to the cutoff temperature in only 3 minutes A thin lift of asphalt …

Compacting Hot-Mix Asphalt Pavements: Part II | Roads

However, these capabilities vary with layer thickness, mix temperature, mix design (asphalt content and aggregate gradation) and environmental conditions In addition, the number of roller passes required of a particular roller depends on its position in the roller train-breakdown, intermediate or finish rolling

Summer Pet Tips: Hot Asphalt and Your Dog

Asphalt temperature and the outdoor temperature are two very different things When the outside air temperature is 77 degrees the asphalt in the sun is 125 degrees You can fry and egg at 131 degrees just imagine how your dog feels as you drag him along to the farmers market or outdoor festival being held on asphalt

Asphalt QMS Manual - Connect NCDOT

As an exception to this, when in any day's operations, the placement of a layer of asphalt base course material or intermediate course material 2" or greater in thickness has started, it may continue until the temperature drops to 32 ° F

Asphalt Pavement Thickness and Mix Design - Asphalt

Mix temperature is dependent on the grade of asphalt used in the mix Less viscous the asphalt requires lower the temperatures, while more viscous asphalt requires higher temperaturesAt the start of a mix design project, target temperatures are specified for proper mixing and compaction

Inspection - Virginia Department of Transportation

The placement of asphalt concrete pavements is a high Road Sampling, Testing and Inspection of Asphalt Pavements All temperature measurements and the average shall be recorded 6 2011 v10 2011 v10 7 Temperature Limitations

Minimum Temperature to Pave with Asphalt - Earthwork

Nov 10, 2010 · RE: Minimum Temperature to Pave with Asphalt CarlB (Civil/Environmental) 6 Oct 10 13:16 As the end of the season nears in cold climates, a lot of pavement gets put down in temperatures colder than 40 degrees