Poly (vinyl alcohol) fiber reinforced concrete: Investigation of strain rate dependent interphase behavior with single fiber pullout test under quasi-static and high rate loading

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Christina Scheffler - , Leibniz-Institut für Polymerforschung Dresden (Autor:in)
  • Serge Zhandarov - , Leibniz-Institut für Polymerforschung Dresden, Belarus Academy of Sciences (Autor:in)
  • Wolfgang Jenschke - , Leibniz-Institut für Polymerforschung Dresden (Autor:in)
  • Edith Mäder - , Leibniz-Institut für Polymerforschung Dresden (Autor:in)

Abstract

A new single fiber pullout device was used to investigate interfacial debonding in the poly (vinyl alcohol) (PVA) fiber-cementitious matrix system under impact loading. For comparison, PVA fibers with two different surface states were used - as-received and after fiber finish removal by extraction in solvents. The indirect method was employed to determine the interfacial strength parameters, namely, the local interfacial shear strength, sd , and the critical energy release rate, Gic, from the peak load values reached in the pullout test. For both fiber surface states, the sd and Gic values for high loading rates appeared to be considerably greater than the corresponding parameters determined by means of a quasi-static pullout test. This can be explained using a model based on Zhurkov's kinetic (thermal fluctuation) theory of the strength of solids, which also enabled to estimate the apparent activation energy for interfacial debonding. Its values (1.3 eV for both as-received and treated fibers) evidenced formation of strong bonds between PVA fiber and the concrete matrix and the identity of debonding mechanisms for both fiber types. Finish removal decreased interfacial adhesion due to smoothing the fiber surface and reducing interfacial mechanical bonding.

Details

OriginalspracheEnglisch
Seiten (von - bis)385-402
Seitenumfang18
FachzeitschriftJournal of Adhesion Science and Technology
Jahrgang27
Ausgabenummer4
PublikationsstatusVeröffentlicht - 2013
Peer-Review-StatusJa
Extern publiziertJa

Schlagworte

Schlagwörter

  • Concrete matrix, Failure criterion, Fiber/matrix bond, Impact behavior, Interfacial strength, Pullout test, PVA fiber