Cube Strength Test of Hybrid Fiber Reinforced Alkali-Activated Coral Concrete

DOI

10.2991/978-94-6463-728-1_7How to use a DOI?

Keywords

Coral Concrete; Alkali-Activated; Hybrid Fiber; Mechanical Property; Green Building Materials

Abstract

In remote ocean reefs, coral concrete made from local materials could be used as an alternative to traditional concrete. However, the application of coral concrete is limited by its low strength, high brittleness, and poor durability. To address this issue, researchers have developed alkali-activated coral concrete (AACC) by replacing cement with alkali-activated binders made from industrial waste materials and alkaline activators, thus enhancing the durability of coral concrete components. Despite the durability advantages of AACC, it still suffers from low strength and high brittleness. To improve these deficiencies, this study incorporated stainless steel fibers (SSFs) and polypropylene fibers (PEs) to enhance the strength and toughness of AACC. Compression and splitting tensile tests on hybrid-fiber reinforced alkali-activated coral concrete (HFRAACC) cubes were conducted. The focusing on the effects of single-fiber dosage, hybrid-fiber dosage, and the hybrid-fiber ratio on strength. The experimental results indicate that the inclusion of hybrid fibers significantly improves the failure modes and working performance of the specimens. When single fibers are added, the reinforcing effect of SSFs increases with fiber dosage, whereas PEs exhibit only a slight reinforcing effect at low fiber dosages. With hybrid fibers, as the total fiber dosage increases, the reinforcing effect on compressive strength diminishes, while the reinforcing effect on tensile strength improves. Furthermore, the hybrid-fiber ratio is a crucial factor influencing the reinforcing effects, with a higher SSF-to-PE ratio yielding more significant improvements. The strength of coral concrete also affects the overall enhancement provided by the hybrid fibers.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Bing Liu
AU  - Yang Wang
AU  - Yaowen Zhang
AU  - Yuanju Li
AU  - Yang Ming
PY  - 2025
DA  - 2025/05/19
TI  - Cube Strength Test of Hybrid Fiber Reinforced Alkali-Activated Coral Concrete
BT  - Proceedings of the 3rd International Conference on Green Building, Civil Engineering and Smart City (GBCESC 2024)
PB  - Atlantis Press
SP  - 55
EP  - 62
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-728-1_7
DO  - 10.2991/978-94-6463-728-1_7
ID  - Liu2025
ER  -