Finalization Of A Test Procedure For Determining Asphalt Cement Content And Aggregate Gradation Of Hma With The Ignition Method
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Finalization Of A Test Procedure For Determining Asphalt Cement Content And Aggregate Gradation Of Hma With The Ignition Method
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Author : Stuart Patrick Mager
language : en
Publisher:
Release Date : 1996
Finalization Of A Test Procedure For Determining Asphalt Cement Content And Aggregate Gradation Of Hma With The Ignition Method written by Stuart Patrick Mager and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Aggregates (Building materials) categories.
Asphalt Content Determination By The Ignition Method
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Author : Elton R. Brown
language : en
Publisher:
Release Date : 1994
Asphalt Content Determination By The Ignition Method written by Elton R. Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aggregates (Building materials) categories.
This paper describes the development and testing for the ignition method for determining asphalt content and aggregate gradation of asphalt-aggregate mixtures. The ignition method utilizes the mass of hot-mixed asphalt mixture before and after removal of asphalt cement by burning at 593 deg C (1100 deg F) to measure asphalt content. The recovered aggregate from ignition testing may also be used for gradation analysis. The test procedure is safer and simpler than current methods of asphalt content and gradation determination. The ignition method was evaluated in both the laboratory and field. In the laboratory, ignition testing was performed on 80 samples of hot-mixed asphalt. The ignition method proved to be precise and accurate in determining both asphalt content and aggregate gradation.
Determination Of Asphalt Content By Ignition Method
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Author : Wei Zhang
language : en
Publisher:
Release Date : 1996
Determination Of Asphalt Content By Ignition Method written by Wei Zhang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Aggregates (Building materials) categories.
Modified Ignition Oven Test Procedure For Determination Of Binder Content In Hot Mix Asphalt Containing Dolomite Aggregate
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Author : Karol J. Kowalski
language : en
Publisher:
Release Date : 2011
Modified Ignition Oven Test Procedure For Determination Of Binder Content In Hot Mix Asphalt Containing Dolomite Aggregate written by Karol J. Kowalski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Binder content categories.
The binder content of hot mix asphalt (HMA) is most commonly determined either by solvent extraction or ignition oven (IO) methods. Generally, the IO method has worked well with various HMA mixtures except those containing certain types of high mass loss (decomposing) aggregates, especially dolomite. For these aggregates, the high temperatures experienced during the ignition process initiate chemical changes within the aggregate particles, which result in variable mass losses. This, in turn, causes difficulties in calculating a consistent correction factor and determining a repeatable binder content. This paper presents a modified IO binder content determination method, which involves lowering the test temperature to 427°C and reducing the sample mass by half. In addition, only the bottom material basket of the typical IO test setup is used to avoid errors in the results due to temperature differentials that develop when, upon ignition, mixture from the lower basket starts heating the mixture in the upper basket. The proposed method was successfully verified by using six different plant-produced mixtures.
Using Ignition Ovens To Determine Asphalt Content And To Prepare Aggregates For Sieve Analysis
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Author : Robert E. Lee
language : en
Publisher:
Release Date : 1996
Using Ignition Ovens To Determine Asphalt Content And To Prepare Aggregates For Sieve Analysis written by Robert E. Lee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Aggregates (Building materials) categories.
The Materials and Tests Division's Bituminous Section evaluated the ignition method as an alternative to the solvent method for determining asphalt content. Three ovens (the Gilson Asphalt Binder Ignition Furnace, Model HM 378; the NCAT Asphalt Content Tester; and the Troxler Asphalt Quality Analyzer) were evaluated for accuracy, precision, and performance. Ignition was proven to be an appropriate method of determining asphalt content. The test procedure resulting from this work is Tex-236-F, which is included in Appendix A.
Standard Method Of Test For Determining The Asphalt Binder Content Of Hot Mix Asphalt Hma By The Ignition Method
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Author : American Association of State Highway and Transportation Officials
language : en
Publisher:
Release Date : 2018
Standard Method Of Test For Determining The Asphalt Binder Content Of Hot Mix Asphalt Hma By The Ignition Method written by American Association of State Highway and Transportation Officials and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Binders (Materials) categories.
"AASHTO T 308-18 test method covers the determination of asphalt binder content of hot mix asphalt (HMA) by ignition at temperatures that reach the flashpoint of the binder in a furnace. The means of specimen heating may be the convection method or the direct infrared (IR) irradiation method. The aggregate remaining after burning can be used for sieve analysis using T 30." --
Manual Of Test Procedures For Materials
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Author : Illinois. Division of Highways. Bureau of Materials and Physical Research
language : en
Publisher:
Release Date : 2007
Manual Of Test Procedures For Materials written by Illinois. Division of Highways. Bureau of Materials and Physical Research and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Asphalt categories.
Evaluation Of The Binder Ignition System Method
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Author : Ronald L. Netemeyer
language : en
Publisher:
Release Date : 1997
Evaluation Of The Binder Ignition System Method written by Ronald L. Netemeyer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Aggregates (Building materials) categories.
Influence Of Hot Mix Asphalt Parameters On The Correction Factors Of The Ignition Oven Test
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Author : PE. Sabaaly
language : en
Publisher:
Release Date : 2002
Influence Of Hot Mix Asphalt Parameters On The Correction Factors Of The Ignition Oven Test written by PE. Sabaaly and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Aggregate categories.
The ignition oven method has been gaining popularity because of its applicability to both laboratory and field conditions, its nondependency on chemicals, and its ability to evaluate both binder content and aggregate gradations. However, the use of this method requires the careful determination of correction factors for both binder content and aggregate gradations. The need for such correction factors stems from the fact that most aggregates experience a certain level of weight loss as they are subjected to elevated temperatures. These weight losses must be accounted for in order to accurately determine the binder content and aggregate gradation of HMA mixtures. It is well accepted that the most important step of the ignition oven test is the determination of an accurate correction factor. The implementation of the ignition oven method requires the highway agency to assess the performance of the local materials with the test procedure and to identify the mixture parameters that significantly impact the determined correction factor. In preparation for the implementation of the ignition oven test, the Nevada Department of Transportation (NDOT) conducted an extensive laboratory testing program to assess the impact of the various mix parameters on the determination of the correction factors. The experiment included aggregate source, binder type, lime, and testing temperature. This paper analyzes the data generated from the NDOT experiment and evaluates the impact of each of the considered factors on the correction factor. In summary, the analysis of the data generated in the NDOT experiment showed that the aggregate source and the addition of lime have the most significant impact on the determined correction factor followed by the temperature and binder type. However, if during a field project the binder or the method of lime application changes, this change would not require the determination of a new correction factor. The data also showed that the blank aggregate method would generate correction factors that are less variable than the known asphalt content method.
An Alternate Method To Determine Asphalt Content Of Hot Mix Asphalt Using Volumetric Properties
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Author : M. S. Shaheed
language : en
Publisher:
Release Date : 2004
An Alternate Method To Determine Asphalt Content Of Hot Mix Asphalt Using Volumetric Properties written by M. S. Shaheed and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Asphalt categories.
Accurate determination of asphalt content (AC) in hot mix asphalt (HMA) is essential to evaluate the performance characteristics of HMA pavements. The standard test methods for determining the AC, currently used by the Oklahoma Department of Transportation (ODOT) and other DOTs and asphalt industries, are time-consuming, environmentally unsuitable, and not applicable to several absorptive and dolomitic aggregates. This study has developed a systematic method for the determination of AC using volumetric properties of aggregate, asphalt, and HMA mix. The developed method employed the theoretical maximum specific gravity (Gmm) of an HMA mix, the bulk and apparent specific gravity of the aggregate (Gsb and Gsa), and the specific gravity of the asphalt binder (Gb). The CoreLokTM device is used to determine the volumetric properties of the aggregate and HMA mix. This developed method is easy to use, environmentally safe, time efficient, and accurate. Three different aggregates were selected for the study based on varying gradation, absorption, and ignition oven correction (IOC) factor. HMA mixes were prepared with each of these aggregates using 5.0 %, 5.5 %, and 6.0 % AC. For each of the mixes, AC was calculated using the proposed method and compared with the actual AC value. The predicted AC values were compared with AC values from the ignition oven method (AASHTO T 308) and the solvent extraction method (AASHTO T 164). Results showed that the proposed method predicted the AC of HMA mix accurately. The method introduces a correction factor (Cv), which needs to be determined during the design stage and specified on the mix design information. The Cv value is used to calculate AC by the proposed method during quality assurance and quality control at the production and service life of HMA.