EFFECTIVENESS OF AGRO-WASTES MATERIALS IN MINIMIZING ALKALI-SILICA REACTIONS IN CONCRETE PAVEMENT

Authors

  • J. A. Ajayi

  • C. M. Ikumapayi

  • O. J. Oyedepo

  • A. O. Olalemi

DOI:
https://doi.org/10.51459/futajeet.2026.20.1.529
Keywords:
Agro-waste, Sawdust ash, Rice husk ash, Bamboo leave ash, alkali-silica reaction, concrete pavement
Abstract

This study assesses the effectiveness of three agro-waste-based supplementary cementitious materials: Sawdust Ash (SDA), Rice Husk Ash (RHA), and Bamboo Leaf Ash (BLA) in reducing alkali-silica reaction (ASR) in concrete pavement. The partial replacement of cement with agricultural waste materials to manufacture concrete pavements can considerably contribute to Sustainable Development Goal 11 (SDG 11), which aims to make cities and human settlements inclusive, safe, resilient, and sustainable. Given the growing concern about concrete durability and environmental sustainability, the study investigates the application of these pozzolanic materials as partial cement replacements (0-30%) in preventing alkali Silica reaction (ASR) induced expansion. A grade 15 concrete samples with dimensions of 30 mm by 30 mm by 100 mm were produced using a water cement ratio of 0.55 for ASR evaluation, while another set of concrete samples with 100 mm by 100 mm were created for water absorption tests. The accelerated mortar bar test (ASTM C1260) was used to measure ASR potential, as well as water absorption tests to determine the materials' durability. X-ray Fluorescence (XRF) analysis showed that all three ashes met ASTM C618 criteria, with combined SiO?, Al?O?, and Fe?O? composition surpassing 70%, indicating pozzolanic potential. RHA demonstrated the most effective ASR reduction, with expansions as low as 0.010% at 10-15% replacement. BLA and SDA both demonstrated effective performance at optimal replacement levels (10-15%), however SDA had a narrower effective range and became reactive at higher dosages. To maintain both durability and reactivity control, all materials should be replaced at 10-15% intervals.

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Published
2026-03-31
Issue
Vol. 20 No. 1 (2026): FUTA Journal of Engineering and Engineering Technology
Section
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How to Cite

EFFECTIVENESS OF AGRO-WASTES MATERIALS IN MINIMIZING ALKALI-SILICA REACTIONS IN CONCRETE PAVEMENT. (2026). FUTA JOURNAL OF ENGINEERING AND ENGINEERING TECHNOLOGY, 20(1), 1-7. https://doi.org/10.51459/futajeet.2026.20.1.529

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