GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Evaluation of Fracture Toughness of Semirigid Asphalt Concretes at Low Temperatures
    SAGE Publications ; 2011
    In:  Transportation Research Record: Journal of the Transportation Research Board Vol. 2210, No. 1 ( 2011-01), p. 30-36
    Details
    In: Transportation Research Record: Journal of the Transportation Research Board, SAGE Publications, Vol. 2210, No. 1 ( 2011-01), p. 30-36
    Abstract: The fracture characteristics of semirigid asphalt concrete (SRAC) prepared from a highly porous asphalt mixture (matrix) with 18% to 22% air voids and cement paste were evaluated. Two asphalt binders and several polymer-modified cement pastes that were grouted into the porous matrix were used. The SRAC beam specimen was prepared, and an initial notch was made by cutting with a saw at the bottom center of each beam for the static three-point bending (3PB) test at low temperatures (10°C, 0°C, and −10°C). Fracture toughness (K IC ) was calculated with 3PB test data to examine the fracture resistance of the SRAC. The two SRAC binders, a normal asphalt (PG 64-22) and a polymer-modified asphalt (PG 76-22), exhibited significant differences in K IC values within the temperature and the paste type. The SRAC using PG 76-22 showed K IC values 17% higher than the SRAC using PG 64-22 at −10°C. Therefore, the SRAC using PG 76-22 binder is expected to have better low-temperature fracture resistance than the SRAC using PG 64-22 binder in the region where the low temperature commonly reaches −10°C.
    Type of Medium: Online Resource
    ISSN: 0361-1981 , 2169-4052
    URL: Article
    DOI: 10.3141/2210-04
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2011
    detail.hit.zdb_id: 2403378-9
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Simplified Viscoelastic Continuum Damage Model as Platform for Asphalt Concrete Fatigue Analysis
    SAGE Publications ; 2012
    In:  Transportation Research Record: Journal of the Transportation Research Board Vol. 2296, No. 1 ( 2012-01), p. 36-45
    Details
    In: Transportation Research Record: Journal of the Transportation Research Board, SAGE Publications, Vol. 2296, No. 1 ( 2012-01), p. 36-45
    Abstract: Cracking in asphalt concrete pavements is a major form of pavement distress in the United States. Because the cracking phenomenon is complex and cracking is often affected by both material and structural factors, field engineers have no quick and effective test and analysis protocols. A suite of fatigue analysis tools—as well as applications built around the simplified viscoelastic continuum damage (S-VECD) model—is presented. The S-VECD formulation is presented in a summarized form. Next, the characterization protocols, which are consistent with the capabilities of the asphalt mixture performance tester, are shown. Considerable attention is then given to S-VECD–based analysis tools for assessment of material- and pavement-level fatigue performance. Results show that the S-VECD model can be used to predict the number of cycles until fatigue failure for both constant stress and constant strain loading. The S-VECD model's sensitivity to mixture composition and external factors is shown through predictions of the endurance limit. Finally, pavement performance predictions are used to show how the S-VECD model can predict the field performance results of full-scale accelerated pavement tests, quantify the expected performance of pavement design alternatives, and identify factors that affect top-down cracking.
    Type of Medium: Online Resource
    ISSN: 0361-1981 , 2169-4052
    URL: Article
    DOI: 10.3141/2296-04
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2012
    detail.hit.zdb_id: 2403378-9
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Development of Policy Guidance for Temporary Rumble Strips
    SAGE Publications ; 2023
    In:  Transportation Research Record: Journal of the Transportation Research Board
    Details
    In: Transportation Research Record: Journal of the Transportation Research Board, SAGE Publications
    Abstract: Temporary rumble strips are used by state departments of transportation (DOTs) to help reduce vehicle speeds in work zones and to alert drivers they are approaching a work zone. A research study was undertaken to develop policy guidance for the use of temporary rumble strips by DOTs. The research methodology included a review of existing literature, synthesis of DOT practices, and field observations of driver behavior and installation of temporary rumble strips. This paper presents the first known assessment of DOT practices for both long-term and short-term temporary rumble strips in the United States. Field observations noted minimal erratic driver behavior (1/8636) such as swerving to avoid the temporary rumble strips. A synthesis of 18 existing DOT practices found differences in levels of implementation and standards for temporary rumble strips among DOTs. Concerns noted by DOTs and installation personnel include the heavy weight of short-term temporary rumble strips, requirements for installation, worker exposure to traffic, potential for erratic driver behavior, and the need for maintenance of the temporary rumble strips. Suggested modifications to existing DOT practices were developed to address these concerns and potentially reduce cost, increase installation efficiency, enhance worker safety, and improve performance of temporary rumble strips.
    Type of Medium: Online Resource
    ISSN: 0361-1981 , 2169-4052
    URL: Article
    DOI: 10.1177/03611981231167153
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2403378-9
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Field and Laboratory Evaluation of Fracture Resistance of Illinois Hot-Mix Asphalt Overlay Mixtures
    SAGE Publications ; 2009
    In:  Transportation Research Record: Journal of the Transportation Research Board Vol. 2127, No. 1 ( 2009-01), p. 146-154
    Details
    In: Transportation Research Record: Journal of the Transportation Research Board, SAGE Publications, Vol. 2127, No. 1 ( 2009-01), p. 146-154
    Abstract: A major study of reflective cracking of asphalt overlays that are used in conjunction with interlayer systems for reflective-crack control was recently completed. In this cooperative study at the Illinois Center for Transportation, three field projects in central Illinois were selected and extensive coring was performed. Six fundamentally different types of hot-mix asphalt overlay mixtures, which were expected to demonstrate significantly different levels of fracture resistance, were obtained from coring. To evaluate the fracture resistance of these mixtures in the field and the laboratory, visual field crack surveys and a series of advanced laboratory tests were conducted. This paper presents field performance evaluation results for the performance–benefit ratio and laboratory performance evaluation results for creep stiffness ( S t ), complex modulus ( E * ), and disk-shaped compact tension fracture energy ( G f ). Field performance of pavement sections with premium overlay mixtures was found to be superior to those sections containing conventional overlay materials. The polymer-modified overlay section in one of three projects was found to have performance inferior to that of the unmodified control overlay section of the same project. This tendency was detected by the G f test but not by the S t or the E * tests. The S t and G f values obtained for the interlayer mixtures were consistent with results typically obtained on short-term aged specimens, validating the appropriateness of the coring and testing approach used here as a forensic investigation tool and indicating that little aging had occurred in the bottom of the overlay system.
    Type of Medium: Online Resource
    ISSN: 0361-1981 , 2169-4052
    URL: Article
    DOI: 10.3141/2127-17
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2009
    detail.hit.zdb_id: 2403378-9
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Effects of Oxidative Aging on Asphalt Mixture Properties
    SAGE Publications ; 2012
    In:  Transportation Research Record: Journal of the Transportation Research Board Vol. 2296, No. 1 ( 2012-01), p. 77-85
    Details
    In: Transportation Research Record: Journal of the Transportation Research Board, SAGE Publications, Vol. 2296, No. 1 ( 2012-01), p. 77-85
    Abstract: Aging has long been recognized as a contributing factor to fatigue distress of asphalt concrete pavement. Several research studies have been undertaken to gain fundamental understanding of the aging phenomenon at the asphalt binder level. However, relatively little effort has been made to understand and to quantify the effects of aging on fundamental characteristics of asphalt mixtures. The effects of oxidative aging on the dynamic modulus and the fatigue performance of asphalt mixtures is examined. For this purpose, an asphalt mixture is aged in the laboratory at four aging levels. Mechanical tests for the four aged mixtures are performed to characterize the linear viscoelastic and damage properties. Such characterization is investigated to incorporate the aging effects into a more comprehensive analytical framework for predicting the performance of asphalt concrete pavements. Finally, this framework is used to evaluate the aging effects on an example asphalt concrete pavement. It is found that aging can significantly change the performance of an asphalt concrete pavement, depending on the location evaluated within the pavement structure as well as climate conditions.
    Type of Medium: Online Resource
    ISSN: 0361-1981 , 2169-4052
    URL: Article
    DOI: 10.3141/2296-08
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2012
    detail.hit.zdb_id: 2403378-9
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Origin-Destination Matrices Estimated with a Genetic Algorithm from Link Traffic Counts
    SAGE Publications ; 2001
    In:  Transportation Research Record: Journal of the Transportation Research Board Vol. 1771, No. 1 ( 2001-01), p. 156-163
    Details
    In: Transportation Research Record: Journal of the Transportation Research Board, SAGE Publications, Vol. 1771, No. 1 ( 2001-01), p. 156-163
    Abstract: Several approaches have been developed to cope with the limits of conventional origin-destination (O-D) trip matrix collecting methods. One is the bilevel programming method, which uses a sensitivity analysis-based (SAB) algorithm to solve a generalized least-squares problem. However, the SAB algorithm has revealed a critical shortcoming when there is a significant difference between the target O-D matrix and the true O-D matrix. This problem stems from the heavy dependence of the SAB algorithm on historical O-D information. Such dependence may lead to a state in which the O-D estimator cannot produce a correct solution, especially when travel patterns are dramatically changed. To avoid the problem of dependency, a robust and stable method is required. A solution method is developed with a genetic algorithm, which is widely used in optimization problems to obtain a global solution. From the results of numerical examples, the proposed algorithm is superior to the SAB algorithm regardless of travel patterns.
    Type of Medium: Online Resource
    ISSN: 0361-1981 , 2169-4052
    URL: Article
    DOI: 10.3141/1771-20
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2001
    detail.hit.zdb_id: 2403378-9
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...