Author: Nicolas Faouzi AyoubPublisher:
ISBN:
Category :
Languages : en
Pages : 158
Book Description
Evaluation of Long Term Behavior of Cold-recycled Asphalt Pavement Using the Creep Test
Author: Nicolas Faouzi AyoubPublisher:
ISBN:
Category :
Languages : en
Pages : 158
Book Description
Rheology of Cold-Recycled Pavement Materials Using Creep Test
Author: MS. MamloukPublisher:
ISBN:
Category : Asphalt emulsions
Languages : en
Pages : 7
Book Description
The recycling technique of asphalt pavement materials has been used in the past decade, however, unsolved problems still exist such as rutting or instability. The slow reaction of the softening agents or the new binders or both may be responsible for this phenomenon. The viscosity of the binder in the cold-recycled pavement materials mixed with emulsified asphalts is experimentally analyzed by evaluating certain rheological characteristics of the mixture using the creep test at three temperatures. The properties of the recycled mixture are determined at both early and accelerated long-term aging and the results are compared with the properties of virgin materials. Master creep curves are developed using the time-temperature superposition technique. The creep behavior of the recycled asphalt mixture used in this study does not support the hypothesis of the long-term reaction between the emulsified asphalt and the reclaimed materials. In addition, the bulk specific gravity and the retained moisture in the compacted recycled mixture were evaluated at various ages.
Journal of Testing and Evaluation
Author: Masters Theses in the Pure and Applied Sciences
Author: Wade H. ShaferPublisher: Springer Science & Business Media
ISBN: 1468449192
Category : Science
Languages : en
Pages : 314
Book Description
Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1 957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 28 (thesis year 1 983) a total of 10,661 theses titles from 26 Canadian and 197 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 28 reports theses submitted in-1983, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
Scientific and Technical Aerospace Reports
Author: Transportation Research Record
Author: Evaluation of Long-term Field Performance of Cold In-place Recycled Roads
Author: Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 40
Book Description
Cold in-place recycling (CIR) has become an attractive method for rehabilitating asphalt roads that have good subgrade support and are suffering distress related to non-structural aging and cracking of the pavement layer. Although CIR is widely used, its use could be expanded if its performance were more predictable. Transportation officials have observed roads that were recycled under similar circumstances perform very differently for no clear reason. Moreover, a rational mix design has not yet been developed, design assumptions regarding the structural support of the CIR layer remain empirical and conservative, and there is no clear understanding of the cause-effect relationships between the choices made during the design/construction process and the resulting performance. The objective of this project is to investigate these relationships, especially concerning the age of the recycled pavement, cumulative traffic volume, support conditions, aged engineering properties of the CIR materials, and road performance. Twenty-four CIR asphalt roads constructed in Iowa from 1986 to 2004 were studied: 18 were selected from a sample of roads studied in a previous research project (HR-392), and 6 were selected from newer CIR projects constructed after 1999. This report summarizes the results of a comprehensive program of field distress surveys, field testing, and laboratory testing for these CIR asphalt roads. The results of this research can help identify changes that should be made with regard to design, material selection, and construction in order to lengthen the time between rehabilitation cycles and improve the performance and cost-effectiveness of future recycled roads.
Asphalt Materials, Mixtures, Construction, Moisture Effects, and Sulfur
Author: Mary McLaughlinPublisher: Transportation Research Board National Research
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 188
Book Description
HRIS Abstracts
Author: The Investigation of Cold-mix Asphalt Creep Stiffness Testing Using Multiple Test Apparatuses and Gradations
Author: Alexander JacksonPublisher:
ISBN: 9781303855184
Category : Asphalt
Languages : en
Pages : 68
Book Description
Many current methods of designing and testing Cold In-Place Recycled (CIR) asphalt are undesirable because they require large amounts of material and significant preparation. In an effort to lessen the cost and time of materials testing, this research utilizes several different methods of small scale testing of creep stiffness. These methods include using a Discovery Hybrid Rheometer (DHR) and a three point bending test to find the creep stiffness of emulsion based CIR. The new testing methods utilized samples on the scale of up to a hundredth the size of what the traditional methods of testing require. The two smaller scale tests were compared to the traditional Indirect Tension Test (IDT) testing. In order to fully evaluate the two reduced sample size test methods, this research observed the effect of gradation, temperature, emulsifier type, and Recycled Asphalt Pavement (RAP) content on creep stiffness. If successful, the use of these new test methods could significantly decrease the damage done to roads, and reduce the cost of material management incurred through the quality control testing methods for pavement. Results showed very good correlation between DHR and IDT testing with a proportional difference between the samples. The standard deviations between the DHR and IDT testing were 18.6% and 19.2% of the mean values respectively, indicating similar accuracies of tests. The tests were also able to distinguish between types of material. The proportional difference between the IDT and DHR is expected and is due to the difference of sample and loading configuration. This research begins the validation of using smaller scale DHR tests for CIR stiffness testing.