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 Unconfined Compressive Strength of Stabilized Clay Using Rice Hull Ash – Derived Geopolymer.
<strong>Philippine Engineering Journal</strong>, [S.l.], v. 42, n. 1, july 2021.
ISSN 2718-9287.
Available at: &lt;<a href="https://www.journals.upd.edu.ph/index.php/pej/article/view/7762" target="_new">https://www.journals.upd.edu.ph/index.php/pej/article/view/7762</a>&gt;. Date accessed: 25 sep. 2025.