Influences of Compressive Strength and Casting Position on Flexural Strength of Polypropylene Fiber-Reinforced Self-Compacting Mortar

Totsawat Daungwilailuk; Burachat Kittikornjarus; Saharuethai Kitchanurak; Teerisara Innchou; Anuwat Attachaiyawuth

Authors

Totsawat Daungwilailuk Department of Civil and Environmental Engineering, Faculty of Engineering, Mahidol University, Nakorn Pathom, Thailand
Burachat Kittikornjarus Department of Civil Engineering, Faculty of Engineering, Kasetsart University, Sriracha Campus, Chonburi, Thailand; The Innovation in Infrastructure and Construction Management Research Group, Kasetsart University, Sriracha Campus, Chonburi, Thailand
Saharuethai Kitchanurak Department of Civil Engineering, Faculty of Engineering, Kasetsart University, Sriracha Campus, Chonburi, Thailand
Teerisara Innchou Department of Civil Engineering, Faculty of Engineering, Kasetsart University, Sriracha Campus, Chonburi, Thailand
Anuwat Attachaiyawuth Department of Civil Engineering, Faculty of Engineering, Kasetsart University, Sriracha Campus, Chonburi, Thailand; The Innovation in Infrastructure and Construction Management Research Group, Kasetsart University, Sriracha Campus, Chonburi, Thailand

Keywords:

Pouring Position, Self-Compacting Mortar, Polypropylene Fiber, Flexural Strength, Compressive Strength

Abstract

This article presents the results on the effects of compressive strength, amount of polypropylene fiber and casting position on the flexural strength of polypropylene fiber-reinforced self-compacting mortar in order to identify suitable factors for using such a construction material. The results revealed that the compressive strength slightly improved (around 4%) when the fiber content was 1%. However, compressive strength decreased by 19% when the fiber content increased to 2%. The specimens in the present study had flexural strengths of around 6.0-6.4% of the compressive strengths of the mortar without fiber; flexural strength increased to 24% of compressive strength when the fiber content increased to 2% and when casting was performed at the middle of the beam. The flexural strength of the mortar significantly increased as the fiber content increased; the increase was approximately 33% and 90% as the fiber content increased to 1% and 2% by volume of the mortar. Casting position apparently affected the flexural strength. Pouring at the center of a beam resulted in 20% increase in the flexural strength. Because of the decrease in the compressive strength when the fiber content increased to 2%, polypropylene fiber-reinforced self-compacting mortar might not be suitable for compression members. On the other hand, such a mortar is appropriate for flexural members. The mortar would exhibit the best performance when casting is performed at the center of beam.

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