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Title: Mechanical Performance of Ternary Cementitious Composites with Polypropylene Fiber

Author(s): Emad Pournasiri, Mahyuddin Ramli, and Chee Ban Cheah

Publication: Materials Journal

Volume: 115

Issue: 5

Appears on pages(s): 635-646

Keywords: binary blended cementitious composites; engineered cementitious composites (ECC); flexural behavior; polypropylene (PP) fiber; ternary cementitious composites

DOI: 10.14359/51700797

Date: 9/1/2018

Abstract:
The combination of pulverized fuel ash (PFA) and groundgranulated blast-furnace slag (GGBS) with portland cement may provide added benefits for engineered cementitious composites (ECCs) over a binary cementitious system. This paper aims to investigate the effects of the binary and ternary cementitious system with different binder combinations on rheological properties, compressive strength, flexural strength, and flexural toughness of ECC specimens containing 0%, 1%, and 2% of polypropylene (PP) fiber. Experimental results showed that the compressive strength of ECC increased with the increase of fiber content to a maximum enhancement of 86% over control specimens. Flexural hardening behavior after the first crack was observed for PP-ECC specimens containing 2% fiber due to fiber bridging on the cracks. However, flexural softening behavior was observed for PP-ECC specimens containing 1% fiber. It was experimentally observed that ternary blended binders that contain an equal amount of PFA and GGBS (PFA/GGBS = 1.0) had the highest compressive strength, flexural strength, and flexural toughness.