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Implementation and evaluation of an HMA fracture mechanics based design module
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Transportvetenskap, Väg- och banteknik.
2011 (Engelska)Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

A thickness design module for flexible pavements, based on the HMA fracture mechanics framework, has been developed in order to design against premature failure caused by cracking. The HMA fracture mechanics based design module has been evaluated by designing typical Swedish pavements under typical Swedish climate and loading conditions and comparing the results with a reference design framework. The integrated set of material models predicting the necessary material strength- and creep compliance parameters for crack resistance evaluation within this framework has been evaluated against a number of field cores tested.

Results show that the design module developed is able to accurately predict cracking in Swedish flexible pavements, indicating that the principles behind the design procedure are fundamental and that the material models used are able to make qualitative predictions of the individual material properties used to estimates a mixtures’ resistance to cracking.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH Royal Institute of Technology , 2011. , s. v, 62
Serie
Research report. Avd. för vägteknik, Kungl. Tekniska högskolan ; 2011:07
Nationell ämneskategori
Samhällsbyggnadsteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-33748ISBN: 978-91-7501-010-6 (tryckt)OAI: oai:DiVA.org:kth-33748DiVA, id: diva2:417187
Presentation
2011-05-20, B 25, KTH, Brinellvägen 23, Stockholm, 10:00 (Engelska)
Opponent
Handledare
Anmärkning

QC 20110518

Tillgänglig från: 2011-05-18 Skapad: 2011-05-16 Senast uppdaterad: 2022-06-24Bibliografiskt granskad
Delarbeten
1. Evaluation of a novel calibrated-mechanistic model to design against fracture under Swedish conditions
Öppna denna publikation i ny flik eller fönster >>Evaluation of a novel calibrated-mechanistic model to design against fracture under Swedish conditions
2012 (Engelska)Ingår i: International Journal on Road Materials and Pavement Design, ISSN 1468-0629, E-ISSN 2164-7402, Vol. 13, nr 1, s. 49-66Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Sweden has initiated the development of a new calibrated-mechanistic pavement design procedure to replace the current mechanical-empirical pavement procedure entitled “PMS Objekt.” The first phase was focused on the implementation and calibration of the vi scoelastic fracture mechanics framework entitled “HMA Fracture Mechanics”, developed at the University of Florida. This paper outlines the implementation and calibration of a new pavement design module for Sweden that is based on the HMA fracture mechanics framework. Both the developed design module, as well as the reference model used for calibration (PMS Objekt) are presented in this paper. The results in thickness design after calibration of the design module indicate that the framework is clearly applicable for common Swedish conditions and design standards.

Nyckelord
top-down cracking, Florida cracking model, IDT, PMS Objekt, machanistic pavement design
Nationell ämneskategori
Samhällsbyggnadsteknik
Identifikatorer
urn:nbn:se:kth:diva-33800 (URN)10.1080/14680629.2011.651838 (DOI)000305177400005 ()2-s2.0-84863609638 (Scopus ID)
Anmärkning
QC 20120705Tillgänglig från: 2011-05-18 Skapad: 2011-05-18 Senast uppdaterad: 2022-06-24Bibliografiskt granskad
2. Evaluation of the predictive models used in the new swedish mechanistic-empirical design module
Öppna denna publikation i ny flik eller fönster >>Evaluation of the predictive models used in the new swedish mechanistic-empirical design module
2012 (Engelska)Ingår i: International Journal on Road Materials and Pavement Design, ISSN 1468-0629, E-ISSN 2164-7402, Vol. 13, nr 2, s. 300-311Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In order to perform thickness design of flexible pavements based on the HMA fracture mechanics framework prior to construction, the tensile strength and creep power law parameters of the mixture has to be determined. As samples are normally not available in the design stage, these properties will have to be modelled rather than determined in a laboratory. This paper evaluates material models based on the relationship between dynamic (complex) modulus and creep compliance in order to predict tensile strength and creep power law parameters for a mixture. For this evaluation, fourteen field sections from the United States have been used for verification and the results indicate that the crack resistance of a mixture can indeed be estimated without a development of extensive empirical relations between mixture properties and crack-resistance.

Nyckelord
top-down cracking, mechanistic pavement design, material modelling, IDT, Creep compliance, dissipated creep strain energy
Nationell ämneskategori
Samhällsbyggnadsteknik
Identifikatorer
urn:nbn:se:kth:diva-33802 (URN)10.1080/14680629.2012.677993 (DOI)000305761500007 ()2-s2.0-84863622971 (Scopus ID)
Anmärkning

Updated from submitted to published.QC20120724

Tillgänglig från: 2011-05-18 Skapad: 2011-05-18 Senast uppdaterad: 2022-06-24Bibliografiskt granskad

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