BEHAVIOR OF FIBER REINFORCED MORTAR COMPOSITES UNDER IMPACT LOAD

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GORAN BALOEVIC
JURE RADNIC
NIKOLA GRGIC
DOMAGOJ MATESAN

Abstract

THIS PAPER PRESENTS RESULTS OF THE EXPERIMENTAL STUDY ON THE BE-HAVIOR OF PLAIN AND FIBER REINFORCED CEMENT MORTARS WITH DIFFERENT FIBERS UNDER STATIC AND IMPACT COMPRESSIVE LOAD. GLASS, POLYPROPYL-ENE AND CARBON FIBERS HAVE BEEN USED IN EQUAL DOSAGE BY MASS. THE IMPACT TEST WAS CONDUCTED USING AN IMPACT TOWER WITH DROP HAMMER, WHICH REPRESENTED THE MODIFICATION OF THE SPLIT-HOPKINSON PRESSURE BAR SYSTEM, WITH STRAIN RATES RANGING FROM APPROXIMATELY 35 TO 60 S-1. THE RESULTS OF THE STATIC TEST AND IMPACT TEST WITH TWO DIFFERENT DROP HEIGHTS WERE COMPARED AND DISCUSSED. AMONG OTHER, IT HAS BEEN CONCLUDED THAT THE TESTED FIBER REINFORCED MORTARS HAD NO GREATER STATIC AND IMPACT STRENGTH COMPARED TO THE PLAIN MORTAR. ONLY THEIR DUCTILITY WAS INCREASED AT BOTH STATIC AND IMPACT FAILURE. STRENGTHS AND DUCTILITY OF ALL COMPOSITE SPECIMENS WERE SIMILAR, I.E. WITHOUT THE EFFECT OF FIBER TYPE. WITH THE INCREASE OF STRAIN RATE, COMPRESSIVE STRENGTH IS INCREASED AND DUCTILITY IS DECREASED FOR ALL TESTED SPECIMENS.

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Author Biographies

GORAN BALOEVIC, University of Split, Faculty of Civil Engineering, Architecture and Geodesy Matice hrvatske 15, 21000 Split, Croatia

Faculty of civil engineering, architecture and geodesy

Researcher/Teaching assistant

JURE RADNIC, University of Split, Faculty of Civil Engineering, Architecture and Geodesy Matice hrvatske 15, 21000 Split, Croatia

Faculty of civil engineering, architecture and geodesy

Full professor

NIKOLA GRGIC, University of Split, Faculty of Civil Engineering, Architecture and Geodesy Matice hrvatske 15, 21000 Split, Croatia

Faculty of civil engineering, architecture and geodesy

Assistant professor

DOMAGOJ MATESAN, University of Split, Faculty of Civil Engineering, Architecture and Geodesy Matice hrvatske 15, 21000 Split, Croatia

Faculty of civil engineering, architecture and geodesy

Associate professor