Design and evaluation of high-volume fly ash (HVFA) concrete mixes, report D : creep, shrinkage, and abrasion resistance of HVFA concrete.
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Design and evaluation of high-volume fly ash (HVFA) concrete mixes, report D : creep, shrinkage, and abrasion resistance of HVFA concrete.

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  • English

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    • Edition:
      Final report.
    • NTL Classification:
      NTL-HIGHWAY/ROAD TRANSPORTATION-Design ; NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance ;
    • Abstract:
      The main objective of this study was to determine the effect on shrinkage, creep,

      and abrasion resistance of high-volume fly ash (HVFA) concrete. The HVFA concrete

      test program consisted of comparing the shrinkage, creep, and abrasion performance of

      two concrete mix designs with 70% cement replacement with Class C fly ash relative to a

      Missouri Department of Transportation (MoDOT) standard mix design.

      Modified versions of standard test methods were used for the shrinkage and creep

      portions of the study. Shrinkage was measured through a modified version of ASTM

      C157 “Standard Test Method for Length Change of Hardened Hydraulic-Cement Mortar

      and Concrete,” while creep was measured through a modified version of ASTM C512

      “Standard Test Method for Creep of Concrete in Compression.” Abrasion resistance was

      measured in accordance with ASTM C944 “Standard Test Method for Abrasion

      Resistance of Concrete or Mortar Surfaces by Rotating-Cutter Method.”

      In addition to comparisons between the three mix designs, the results were also

      compared to existing prediction models and previous research results on HVFA concrete.

      Both HVFA concrete mixes showed a significant decrease in shrinkage strain relative to

      the control concrete, which was very consistent with previous research. With regard to

      creep, both HVFA concrete mixes also showed improved performance over the control

      mix, again confirming previous research results. However, the control concrete exhibited

      improved abrasion resistance relative to the two HVFA concrete mixes, which coincided

      with the higher strength of the control mix. At later ages, the abrasion resistance of the

      HVFA concrete improved due to late age strength gain characteristic of this material.

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