Selection and Performance Evaluation of a Test Method to Assess Thermal Cracking Resistance of Asphalt-aggregate Mixtures

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ISBN 13 :
Total Pages : 610 pages
Book Rating : 4.:/5 (362 download)

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Book Synopsis Selection and Performance Evaluation of a Test Method to Assess Thermal Cracking Resistance of Asphalt-aggregate Mixtures by : Duhwoe Jung

Download or read book Selection and Performance Evaluation of a Test Method to Assess Thermal Cracking Resistance of Asphalt-aggregate Mixtures written by Duhwoe Jung and published by . This book was released on 1993 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal distress in asphalt concrete pavements is a widespread problem around the world. Thermal cracking can be divided into two modes of distress: low temperature cracking and thermal fatigue cracking. Low temperature cracking results from extremely cold temperatures; thermal fatigue cracking results from daily temperature cycles. Low temperature cracking is attributed to tensile stresses induced in the asphalt concrete pavement as the temperature drops to an extremely low temperature. If the pavement is cooled, tensile stresses develop as a result of the pavement's tendency to contract. The friction between the pavement and the base layer resists the contraction. If the tensile stress equals the strength of the mixture at that temperature, a micro-crack develops at the surface of the pavement. Under repeated temperature cycles, the crack penetrates the full depth and across the asphalt concrete layer. The thermal stress restrained specimen test (TSRST) was identified as an accelerated laboratory test to evaluate the thermal cracking resistance of asphalt concrete mixtures. The TSRST system developed at OSU includes a load system, data control/acquisition system and software, temperature control system, and specimen alignment stand. The overall system is controlled by a personal computer. A TSRST is conducted by cooling an asphalt concrete specimen at a specified rate while monitoring the specimen at constant length. A typical thermally-induced stress curve is divided into two parts: relaxation and non-relaxation. The temperature at which the curve is divided into two parts is termed the transition temperature. The temperature at fracture is termed the fracture temperature and the maximum stress is the fracture strength. An extensive number of TSRSTs over a wide range of conditions were performed to investigate the thermal cracking resistance of asphalt concrete mixtures. The TSRST results provided a very strong indication of low temperature cracking resistance for all mixtures considered. A ranking of mixtures for low temperature cracking resistance based on the TSRST fracture temperature was in excellent agreement with a ranking based on the physical properties of the asphalt cements. It is highly recommended that the TSRST be used in mix evaluation to identify low temperature cracking resistance of asphalt concrete mixtures. The TSRST showed very promising results regarding the effect of all variables which are currently considered to affect the low temperature cracking of mixtures. The variables considered to have significant affect on the low temperature cracking resistance of mixtures in this study include asphalt type, aggregate type, degree of aging, cooling rate, and stress relaxation.

Low-temperature Cracking

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Publisher : National Research Council
ISBN 13 :
Total Pages : 124 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Low-temperature Cracking by : D. H. Jung

Download or read book Low-temperature Cracking written by D. H. Jung and published by National Research Council. This book was released on 1994 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the thermal stress restrained specimen test (TSRST), which was selected to evaluate the low-temperature cracking resistance of asphalt concrete mixtures. The TSRST system includes a load frame, step-motor-driven load ram, data acquisition hardware and software, temperature controller, and specimen alignment stand. An experiment design that considered a range of mixture and test condition variables was developed to evaluate the suitability of TSRST for characterizing low-temperature cracking resistance of asphalt concrete mixtures. Four asphalts and two aggregates were selected for the experiment. The mixture variables included asphalt type, aggregate type, and air voids content; the test condition variables included specimen size, stress relaxation, aging, and cooling rate.

A Simple Test Procedure for Evaluating Low Temperature Crack Resistance of Asphalt Concrete

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ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.:/5 (489 download)

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Book Synopsis A Simple Test Procedure for Evaluating Low Temperature Crack Resistance of Asphalt Concrete by : Sang Soo Kim

Download or read book A Simple Test Procedure for Evaluating Low Temperature Crack Resistance of Asphalt Concrete written by Sang Soo Kim and published by . This book was released on 2009 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current means of evaluating the low temperature cracking resistance of HMA relies on extensive test methods that require assumptions about material behaviors and the use of complicated loading equipment. The purpose of this study was to develop and validate a simple test method to directly measure the cracking resistance of hot mix asphalt under field-like conditions. A ring shape asphalt concrete cracking device (ACCD) was developed. ACCD utilizes the low thermal expansion coefficient of Invar steel to induce tensile stresses in a HMA sample as temperature is lowered. The results of the tests of the notched ring shaped specimens compacted around an ACCD Invar ring showed good repeatability with less than 1.0°C (1.8°F) standard deviation in cracking temperature. A laboratory validation indicated that ACCD results of five mixes correlate well with thermal stress restrained specimen test (TSRST) results with the coefficient of determination , r2 = 0.86. To prepare a sample and complete TSRST measurement, it takes minimum 2-3 days. For ACCD, two samples can be easily prepared and tested in a single day with a small test set-up. The capacity of ACCD can be increased easily with minimal cost to accommodate a larger number of samples. Among factors affecting the low temperature performance of HMA, the coefficient of thermal expansion (CTE) of aggregate has been overlooked for years. A composite model of HMA is proposed to describe the low temperature cracking phenomenon. Due to the orthotropic and composite nature of asphalt pavement contraction during cooling, the effects of aggregate CTE is amplified up to 18 times for a typical HMA. Of 14 Ohio aggregates studied, the maximum and the minimum CTEs are 11.4 and 4.0 x 10-6/°C, respectively. During cooling, the contraction of Ohio aggregate with high CTE can double the thermal strain of asphalt binders in the asphalt mix and may cause asphalt pavement thermal cracking at warmer temperature.

Evaluation of Indirect Tensile Test (IDT) Procedures for Low-temperature Performance of Hot Mix Asphalt

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Publisher : Transportation Research Board
ISBN 13 : 0309088089
Total Pages : 62 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Evaluation of Indirect Tensile Test (IDT) Procedures for Low-temperature Performance of Hot Mix Asphalt by : Donald W. Christensen

Download or read book Evaluation of Indirect Tensile Test (IDT) Procedures for Low-temperature Performance of Hot Mix Asphalt written by Donald W. Christensen and published by Transportation Research Board. This book was released on 2004 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction and Research Approach -- Findings -- Interpretation, Appraisal, and Applications -- Conclusions and Recommendations -- References -- Appendixes.

Asphalt-aggregate Mixture Analysis System, AAMAS

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Publisher : Transportation Research Board
ISBN 13 : 9780309048613
Total Pages : 196 pages
Book Rating : 4.0/5 (486 download)

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Book Synopsis Asphalt-aggregate Mixture Analysis System, AAMAS by : National Research Council (U.S.). Transportation Research Board

Download or read book Asphalt-aggregate Mixture Analysis System, AAMAS written by National Research Council (U.S.). Transportation Research Board and published by Transportation Research Board. This book was released on 1991 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Circular

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ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Circular by :

Download or read book Circular written by and published by . This book was released on 1993 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mix Design Practices for Warm Mix Asphalt

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Publisher : Transportation Research Board
ISBN 13 : 0309155592
Total Pages : 111 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Mix Design Practices for Warm Mix Asphalt by : Ramon Francis Bonaquist

Download or read book Mix Design Practices for Warm Mix Asphalt written by Ramon Francis Bonaquist and published by Transportation Research Board. This book was released on 2011 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Report 691: Mix Design Practices for Warm-Mix Asphalt explores a mix design method tailored to the unique material properties of warm mix asphalt technologies. Warm mix asphalt (WMA) refers to asphalt concrete mixtures that are produced at temperatures approximately 50°F (28°C) or more cooler than typically used in the production of hot mix asphalt (HMA). The goal of WMA is to produce mixtures with similar strength, durability, and performance characteristics as HMA using substantially reduced production temperatures. There are important environmental and health benefits associated with reduced production temperatures including lower greenhouse gas emissions, lower fuel consumption, and reduced exposure of workers to asphalt fumes. Lower production temperatures can also potentially improve pavement performance by reducing binder aging, providing added time for mixture compaction, and allowing improved compaction during cold weather paving. Appendices to NCHRP Report 691 include the following. Appendices A, B, and D are included in the printed and PDF version of the report. Appendices C and E are available only online.

Focus

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Publisher :
ISBN 13 :
Total Pages : 370 pages
Book Rating : 4.3/5 (555 download)

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Book Synopsis Focus by :

Download or read book Focus written by and published by . This book was released on 1989 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Asphalt Paving Technology

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ISBN 13 :
Total Pages : 868 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Asphalt Paving Technology by : Association of Asphalt Paving Technologists

Download or read book Asphalt Paving Technology written by Association of Asphalt Paving Technologists and published by . This book was released on 1995 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Civil Engineering Materials for Transportation Infrastructure

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Publisher : Springer Nature
ISBN 13 : 9819913004
Total Pages : 305 pages
Book Rating : 4.8/5 (199 download)

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Book Synopsis Civil Engineering Materials for Transportation Infrastructure by : Qiao Dong

Download or read book Civil Engineering Materials for Transportation Infrastructure written by Qiao Dong and published by Springer Nature. This book was released on 2023-05-15 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims to introduce the knowledge, tests, and designs of materials in civil engineering. The scope of this book includes the fundamental mechanical and physical properties of materials; properties, tests, and gradation designs of aggregates; production, composition, hydration, properties, and tests of lime and cement; composition, tests, and design of cement concrete; mechanisms, properties, and design of inorganic binder stabilized material; properties, tests, and grading of asphalt; composition, properties, tests, and designs of asphalt mixture; and properties, treatments, tests, and selections of steel. This book can be used as a textbook or a reference book for undergraduate students, graduate students, and professionals in the field of civil, pavement, bridge, geotechnical, and environmental engineering. In this book, many charts on the key properties are used to help explain the mechanisms of materials. Step-by-step examples are presented to help understand both the knowledge and practices of material design such as the aggregate gradation design, cement concrete design, asphalt grading, and asphalt mixture design. The tests, designs, and specifications of civil engineering materials in China are introduced in detail.

Evaluation of Long-Term Oven Aging of Asphalt Mixtures (AASHTO PP2-95) on Superpave Thermal Cracking Performance Predictions

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ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Evaluation of Long-Term Oven Aging of Asphalt Mixtures (AASHTO PP2-95) on Superpave Thermal Cracking Performance Predictions by : P. Romero

Download or read book Evaluation of Long-Term Oven Aging of Asphalt Mixtures (AASHTO PP2-95) on Superpave Thermal Cracking Performance Predictions written by P. Romero and published by . This book was released on 1997 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was conducted to determine the effects of long term oven aging of asphalt mixtures (AASHTO PP2-95) on the thermal cracking performance evaluation of mixtures using the SUPERPAVE Indirect Tensile Test (IDT). Asphalt mixtures were aged according to the procedures developed by the Strategic Highway Research Program (SHRP) and tested using the SUPERPAVE Indirect Tensile Test after short- and long-term oven aging. The results were used to make thermal cracking performance predictions using the Penn State Thermal Cracking Model, which is a part of the SUPERPAVE mixture analysis system. The analyses indicated that: 1) long-term oven aging of mixtures produced changes in mixture compliance that led to differences in thermal cracking performance predictions, 2) long-term oven aging can produce excessive aging which results in erroneous (unconservative) performance predictions and 3) the relative ranking of thermal cracking performance of short-term oven-aged mixtures is, for most cases, the same as that of long-term oven aged mixtures. In other words, the system distinguished between mixtures with significantly different performance levels regardless of whether the mixtures were tested after short-term oven aging or long-term oven aging. This finding implies that long-term oven aging may not be justified for mixture specification purposes when the SUPERPAVE low temperature performance evaluations are used.

Test Method to Determine Aggregate/asphalt Adhesion Properties and Potential Moisture Damage

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Publisher :
ISBN 13 :
Total Pages : 216 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Test Method to Determine Aggregate/asphalt Adhesion Properties and Potential Moisture Damage by : Andrew Hanz

Download or read book Test Method to Determine Aggregate/asphalt Adhesion Properties and Potential Moisture Damage written by Andrew Hanz and published by . This book was released on 2007 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Low-temperature Cracking

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Publisher : National Research Council
ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Low-temperature Cracking by : Hannele K. Kanerva

Download or read book Low-temperature Cracking written by Hannele K. Kanerva and published by National Research Council. This book was released on 1994 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the field validation program was to evaluate the thermal stress restrained specimen test (TSRST) as the accelerated performance test to predict low-temperature cracking of asphalt concrete mixtures. Construction histories, cracking observations, and temperature data were collected for five test roads. In addition, a validation program was conducted at the United States Army Cold Regions Research and Engineering Laboratory. The laboratory test program consisted of performing the TSRST on specimens fabricated in the laboratory with original materials from the test roads and asphalt concrete pavement specimens cut from the actual test sections. In addition, the field pavements were monitored for crack history and, where possible, crack initiation. TSRST fracture temperature correlated with field cracking temperature and crack frequency. TSRST results can be used to predict field low-temperature cracking of asphalt-aggregate mixtures. Preliminary models to predict cracking frequency and temperature for the test roads were developed.

Introduction to Unmanned Aircraft Systems, Second Edition

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Publisher : CRC Press
ISBN 13 : 113802693X
Total Pages : 1944 pages
Book Rating : 4.1/5 (38 download)

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Book Synopsis Introduction to Unmanned Aircraft Systems, Second Edition by : Douglas M. Marshall

Download or read book Introduction to Unmanned Aircraft Systems, Second Edition written by Douglas M. Marshall and published by CRC Press. This book was released on 2015-10-26 with total page 1944 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proliferation of technological capability, miniaturization, and demand for aerial intelligence is pushing unmanned aerial systems (UAS) into the realm of a multi-billion dollar industry. This book surveys the UAS landscape from history to future applications. It discusses commercial applications, integration into the national airspace system (NAS), System function, operational procedures, safety concerns, and a host of other relevant topics. The book is dynamic and well-illustrated with separate sections for terminology and web- based resources for further information.

Low-temperature Cracking

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Publisher : Strategic Highway Research Program (Shrp)
ISBN 13 :
Total Pages : 124 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Low-temperature Cracking by : D. H. Jung

Download or read book Low-temperature Cracking written by D. H. Jung and published by Strategic Highway Research Program (Shrp). This book was released on 1994 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thermal stress restrained specimen test (TSRST) was developed to determine the thermal, or the low-temperature cracking resistance of asphalt concrete mixes. The test system is capable of cooling an asphalt concrete specimen at a constant rate, while restraining the specimen from contraction and periodically measuring elapsed time, specimen surface temperature, and tensile load. TSRST's were performed on both short- and long-term aged specimens. Statistical analyses were performed on the test results. Rankings of asphalt concrete mixtures based on fracture temperature were compared to rankings based on fundamental properties of the asphalt cement.

Infrastructure

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Publisher :
ISBN 13 :
Total Pages : 1284 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Infrastructure by : Kim D. Basham

Download or read book Infrastructure written by Kim D. Basham and published by . This book was released on 1994 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt: This multidisciplinary volume reviews various new materials and methods used to maintain and rehabilitate the infrastructure systems of the United States. Providing over 120 papers, contributors from a wide variety of disciplines and specialties examine the research and development of high performance materials, new and innovative repair technologies, material durability and material testing, recycled materials, nondestructive evaluation, and quality control. In addition, case studies highlight the use of concrete, bituminous, aggregate base course, structural composite and plastic, metal, and timber materials in rehabilitation efforts.

Thermal Behavior of Crumb-rubber Modified Asphalt Concrete Mixtures

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Publisher :
ISBN 13 :
Total Pages : 826 pages
Book Rating : 4.:/5 (34 download)

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Book Synopsis Thermal Behavior of Crumb-rubber Modified Asphalt Concrete Mixtures by : Amy Epps Martin

Download or read book Thermal Behavior of Crumb-rubber Modified Asphalt Concrete Mixtures written by Amy Epps Martin and published by . This book was released on 1997 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt: