Flexural Fatigue Behavior of High Volume Fly Ash Concrete under Constant Amplitude, Compound, and Variable Amplitude Loading

The constituent materials of a concrete pavement have to be optimized with reference to cost effectiveness and sustainability. This paper presents a study on flexural fatigue behavior of high volume fly ash concrete (HFC) under different types of fatigue loading. The different types of fatigue loading used in the study are: constant amplitude, compound, and variable amplitude loading. Mix proportion of HFC, satisfying the strength requirement of pavement concrete, is developed having a cement replacement level of 60% with low calcium fly ash. A total number of 95 beam specimens are tested under constant amplitude fatigue loading and a total number of 24 beam specimens are tested under compound fatigue loading. The three amplitude loading is used as variable amplitude loading. A total number of 10 beam specimens are tested under variable amplitude loading. The relations between the stress level (S) and the fatigue life (N) are established from the results of constant amplitude and compound loading. The results of compound and variable amplitude loading are also used for validating the Miner’s hypothesis for cumulative fatigue damage. Probabilty analysis carried out on the pooled data of Miner’s sum values showed the normal distribution. The Miner’s hypothesis can be accepted conservatively for the thickness design of rigid pavements.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 389-398
  • Monograph Title: Airfield and Highway Pavements 2019: Testing and Characterization of Pavement Materials

Subject/Index Terms

Filing Info

  • Accession Number: 01728577
  • Record Type: Publication
  • ISBN: 9780784482469
  • Files: TRIS, ASCE
  • Created Date: Jul 18 2019 3:03PM