Evaluation of long-term strength and durability performance of cementitious composites with low polypropylene fiber content and local river sand

  • Viet-Hung Vu Campus in Ho Chi Minh city, University of Transport and Communications, 450 - 451 Le Van Viet street, Tang Nhon Phu A ward, Thu Duc city, Ho Chi Minh city, Vietnam
  • Lanh Si Ho Department of Geotechnical Engineering, University of Transport Technology, 54 Trieu Khuc street, Thanh Xuan district, Hanoi, Vietnam
  • Trong-Phuoc Huynh Department of Civil Engineering, College of Engineering Technology, Can Tho University, Campus II, 3/2 street, Ninh Kieu district, Can Tho city, Vietnam
Keywords: cementitious composites, polypropylene fiber, long-term strength, durability

Abstract

This study aims to investigate the long-term mechanical properties and durability of cementitious composites (CC) with low polypropylene (PP) fiber content and local river sand. The CC samples were prepared with different water-to-binder (w/b) ratios (0.20, 0.25, and 0.3), low PP fiber content (0.6% by mass of binder), locally available river sand, and fly ash (FA) sourced in the Mekong Delta region, corresponding to the mixture name WB20, WB25, and WB30, respectively. Then, the mechanical properties were investigated through compressive and flexural strengths and ultrasonic pulse velocity tests, while durability was assessed via chloride ion penetration and sulfate resistance. The results revealed that the mixture with the w/b of 0.25 achieved the best performance in terms of both mechanical and durability performance due to the optimal conditions of compaction, mixing water content, and also the latent pozzolanic reaction of FA in the hydrated cementitious composites. Besides, the CC samples with 0.6% PP fiber exhibited ductility behavior under compression and flexure, characterizing that CC samples do not completely separate from each other when damaged due to the fiber bridging effect. Moreover, the CC samples obtained excellent long-term durability (up to 120 days old) in terms of sulfate attack and chloride resistance in the following order WB25 > WB20 > WB30. The results of this study confirm the applicability of the local materials for producing good quality and low-cost cementitious composites.

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Published
02-06-2022
How to Cite
Vu, V.-H., Ho, L. S., & Huynh, T.-P. (2022). Evaluation of long-term strength and durability performance of cementitious composites with low polypropylene fiber content and local river sand. Journal of Science and Technology in Civil Engineering (STCE) - HUCE, 16(3), 111-122. https://doi.org/10.31814/stce.huce(nuce)2022-16(3)-09
Section
Research Papers