Development Of New Film Thickness Models For Hot Mix Asphalt

UG-Ap-Asphalt Concrete Pavement

The use of cold mix asphalt is usually limited to relatively low-volume rural roads. For higher traffic applications, cold mix asphalt pavement usually requires an overlay of hot mix asphalt or surface treatment to resist traffic action. The components of cold mix asphalt can be mixed at a central plant or in-situ with a traveling mixer.

Arizona Pavements and Materials Conference

film thickness on the surface of the aggregates. In order to carry ... Design Methods for Asphalt Concrete and Other Hot-Mix ... research and development of asphalt technology, including volumetric mix design procedures. Today AAPT continues as a leader in the advancement of asphalt …

RC-1521 - Development of Simple Performance Tests Using

Development of Simple Performance Tests Using Laboratory Test Procedures to Illustrate the Effects of Moisture Damage on Hot Mix Asphalt Jason Bausano1 Andrea Kvasnak1 R. Christopher Williams1, Ph.D.

User Guide for the Design of Hot Mix Asphalt

The Interim Guidelines for the Design of Hot Mix Asphalt in South Africa (IGHMA) was prepared in 2001 as part of the Hot Mix Asphalt Design Project launched in 1998 by SANRAL (South African National Road Agency Ltd), CSIR Transportek and Sabita (Southern African Bitumen Association). The aim was to develop a new HMA design method for South Africa.


Investigation of In-Place Asphalt Film Thickness and Performance of Minnesota Hot Mix Asphalt Mixtures ... Calibration of the 2002 AASHTO Pavement Design Guide for Minnesota Portland Cement Concrete Pavements and Hot Mix Asphalt Pavements (2004) Evaluation of Interface Modeling in FEDFAA ... Development of Simple Asphalt Test for Determination ...


Hot In-Place Recycling - A method in which the existing pavement is heated and softened, and then scarified or hot rotary mixed to a specified depth. Hot Mix Asphalt Recycling - A process in which reclaimed asphalt pavement material are combined with new material, sometimes along with a recycling agent, to produce hot mix asphalt (HMA) mixtures.


necessary to complete the construction of hot mix asphalt concrete pavement consisting of one or more courses on a previously prepared base, seal coat of asphalt cement and cover aggregate, and bituminous surface treatment in single or multiple courses.

Using waste plastic bottles as additive for stone mastic asphalt

The increase in stability by adding polymers to the hot mix asphalt is attributed to better adhesion developing between the materials in the mix , , . However, PET a has high melting point (the melting point of PET is approximately 250 °C) [28] whereas the maximum temperature for the blend materials in the hot mix asphalt is less than 180 °C.

Investigation of In-Place asphalt film thickness and

This research work investigates approaches for computing the average asphalt film thickness in asphalt mixtures and examines whether the in-place asphalt film thickness has a rational relationship with the performance of hot-mix asphalt mixtures.

Hot Mix Asphalt | Asphalt Calculator

The asphalt Calculator helps you to estimate the Hot Mix (asphalt) tonnage required for your job. To use the asphalt Calculator, simply enter the width, length, and thickness (in inches) of your job. Next, click on the "Calculate" button. The calculator will estimate the number of tons of Hot Mix (asphalt) that will be required.

Determination of Binder Film Thickness for Bituminous

finer than the thickness of the asphalt film blends with asphalt cement binder to form a mortar or mastic that contributes to improved stiffening of the mix. In the present study the film thickness was determined by Hveem method by determining the total surface area and the effect of fillers thereon is discussed.

Reflective Cracking of Flexible Pavements Phase I and II

Reflective Cracking of Flexible Pavements Phase I and II Final Recommendations ... The empirical models consider the development of distresses in the overlay as well as the continuation of damage in the ... conventional dense graded asphalt mixture (AC) or a gap graded hot mix (RAC-G) ...

Layer Coefficients for New and Reprocessed Asphaltic Mixes

A list of layer coefficients is proposed for pavement design. The results of the asphalt materials did not show that there are significant differences in resilient modulus of asphalt mixtures tested; thus, layer coefficients for the asphalt mixtures, derived : based on the resilient modulus, are similar for all asphalt mixtures.

What is Superpave? Understanding Performance-Based Asphalt

A New Approach to Asphalt Mix Design. Rather than a specific process or procedure, Superpave is a performance-based specification for asphalt binder and volumetric mixture design. The idea was to allow asphalt pavement designs that could handle the unique weather and traffic conditions of a given site in any geographic area of the U.S.

How to Compact Asphalt Pavements

May 09, 2016 · How to Compact Asphalt Pavements ... important to compact while the mix is hot. Typically, asphalt comes out of the plant at about 300° F. ... amplitude setting that is dependent on the thickness ...


(a) AS 2150 “Hot mix asphalt - A guide to good practice”; and (b) AGPT04B/07 Austroads “Guide to Pavement Technology Part 4B: Asphalt”. 1.3.5 Requirements for Technical Procedures Details of calculation for insitu air voids and thickness are shown in Annexure R116/E. 1.3.6 Testing Procedures

Notes to specification for open graded porous asphalt TNZ P/11

mixes is important, and is primarily a function of connected voids and the binder film thickness. Though open graded porous asphalt material is designed to have a high proportion of inter-connected voids, it also has a low total aggregate surface area, and hence a substantial binder film thickness is possible as an aid to promoting reasonable

HMA Mix Design Fundamentals

The optimum asphalt binder content as determined by mix design should provide adequate film thickness. Air voids . Excessive air voids (on the order of 8 percent or more) increase HMA permeability and allow oxygen easier access to more asphalt binder thus accelerating oxidation and volatilization.

Asphalt Binder Characteristics Affecting Durability Cracking

Aging in Hot-mix Asphalt Pavements • MN, MD, OH, TX, WI, LRRB • Thomas J. Wood, Lead Agency Contact • Airfield Asphalt Pavement Technology Program (AAPTP) Project 06 -01 • Techniques for Prevention and Remediation of Non-Load-Related Distresses on HMA Airport Pavements • AAPTP sponsors and research panel

Blending and diffusion of reclaimed asphalt pavement and

Nevertheless, binder layer thickness in the mix has a significant impact in these simulations and further understanding of binder film thickness in asphalt mix is necessary to accurately estimate degree of blending. Real mix data from Carpenter and Wolosick [(1980). Modifier influence in the characterization of hot-mix recycled material.


Asphalt Film Thickness (AFT) = 8.2 microns Adjusted AFT = 8.4 microns Guideline notes based on Bituminous Office Consultation * Use Combined Mix Aggregate for Gsb *Surface Area (SA) Calculates to Tenth ex. (27.8)

(PDF) Evaluation the Effect of Asphalt Film Thickness on

Stripping is the separation of the asphalt binder film from the aggregate surface due to the action of water. To evaluate the effect of asphalt film thickness on stripping resistance for loose and ...

Thermal Behavior of an Asphalt Pavement in the Laboratory and

Mar 12, 2015 · In the development of the new constructions with good insulation and low energy demand the use of heat pump system is a good alternative . Typical applications of asphalt collector systems are snow-melting systems (see, e.g., ) and thermal uses in nearby buildings.

Read "Performance Specifications for Asphalt Mixtures" at

Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit to get more information about this book, to buy it in print, or to download it as a free PDF ...

Investigation of In-Place Asphalt Film Thickness and

This research work investigates approaches for computing the average asphalt film thickness in asphalt mixtures and examines whether the in-place asphalt film thickness has a rational relationship with the performance of hot-mix asphalt mixtures.

Development of Mechanistic-Empirical Flexible Pavement Design

For using of this diagrams, At first the minimum functional thickness should be selected by determining the pavement layer technical characteristics, in accordance with management and planning organization, second, with existing Asphalt elastic module and selected thickness of Asphalt layer and base layer , from horizontal axis of asphalt ...

Emission Factor Documentation for AP-42 Hot Mix Asphalt

Emission Factor Documentation for AP-42 Section 11.1 Hot Mix Asphalt Production Final Report For U. S. Environmental Protection Agency Office of Air Quality Planning and Standards

Effect of asphalt film thickness on the moisture sensitivity

Researchers have carried out laboratory experiments related to the effect permeability, air voids and aggregate gradation on the moisture susceptibility of asphalt concrete mixtures , , , however no experimental study has been conducted for evaluating the effect of asphalt film thickness on the water damage of hot-mix asphalt (HMA).

Tack Coat Guidelines

pavement surface or between layers of hot mix asphalt. A tack coat is used to ensure a good bond: • Between the existing pavement surface and the new hot mix asphalt overlay, including planed surfaces. • Between the layers of each lift of hot mix asphalt. • At any vertical surfaces that the new hot mix asphalt will be placed against (curbs,

Putting the Puzzle Together On Our National Asphalt RD&T

MODELS THICKNESS T R A F F I C ENVIRONMENT M A TE R I A L S PERFORMANCE CRITERIA. 9-9(1): Verification of Gyration ... calculated binder film thickness? AAT (March 2004) ... used in hot-mix asphalt and hydraulic cement concrete Washington State University/ TX A&M

Analytical Formulas for Film Thickness in Compacted Asphalt

Recently, several researchers have proposed asphalt film thickness as a criterion for ensuring the durability of asphalt mixtures. However, they suggested that the standard film thickness equation, which dates back to the 1940s, needs to be examined by modern technology and improved.


Materials Quality Assurance Procedures (MQAP) Manual, Hot Mix Asphalt (HMA) Production Manual, Procedures for Aggregate Inspection, Density Control Handbook, and the Michigan Construction Manual to standardize procedures and assure adequate, uniform quality control.

Procedures and Trial Specifications for Hot Mix

susceptibility of hot mix asphalt. • Various models have been developed based on the above testing ... • Asphalt Film Thickness: This property is the measure of ...

A Review on Using Crumb Rubber in Reinforcement of Asphalt

The use of crumb rubber in the reinforcement of asphalt is considered as a smart solution for sustainable development by reusing waste materials, and it is believed that crumb rubber modifier (CRM) could be an alternative polymer material in improving hot mix asphalt performance properties.

tandf: Road Materials and Pavement Design: Table of Contents

Forensic approach to predict film thickness of reacted and activated rubber (RARX) modified asphalt mixtures ... A new paradigm to explain the development of instability rutting in asphalt pavements. ... Effect of liquid silane-based anti-stripping additives on rheological properties of asphalt binder and hot mix asphalt moisture sensitivity.

Final Report: 0612630 Final Report for Period: 01/2010

T. Breakah, S. Khedr and F. Bayomy, "Using Film Thickness to Substitute VMA Criteria for Egyptian Hot Mix Asphalt", (2009). Conference Proceedings, Published Collection: MAIREPAV6, the Sixth International Conference on Maintenance and Rehabilitation of Pavements and Technological Control, held in Torino, Italy on July 8-10, 2009 (

Pavement Manual: Hot-Mix Asphalt Pavement Mixtures

Anchor: #i1013899 Section 6: Hot-Mix Asphalt Pavement Mixtures Anchor: #i1013905 6.1 General. Hot-mix asphalt (HMA) is a generic term that includes many different types of mixtures of aggregate and asphalt cement (binder) produced at elevated temperatures (generally between 300-350ºF) in an asphalt plant.

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