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Geopolymer Bio-Patch Repair: Microbially-Induced Calcite and Pozzolanic Fly Ash and Rice Husk Ash for Corrosion-Resistant of Reinforced Concrete Repair
Pinta Astuti
; Angga Jordi Wisnu Nouvaldi
; Aprilia Rahmayanti
; Pramudya Surya Shabura
; Muhammad Etandra Fara Adzani
; Dylan Ataa Tsany
; Adhitya Yoga Purnama
; Rahmita Sari Rafdinal
Advance Sustainable Science, Engineering and Technology
Vol 8
, No 1
(2026)
Indonesia’s archipelagic environment subjects concrete structures to severe corrosion and sulfate attacks, necessitating sustainable repair solutions. This study evaluates a geopolymer-based bio-patch repair mortar utilizing fly ash (FA), rice husk ash (RHA), and Bacillus subtilis bacteria to induce Microbially Induced Calcite Precipitation (MICP). While the silica-rich ashes act as pozzolanic materials, the bacteria enhance durability by reducing oxygen levels and lowering corrosion rates. Micr...
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Performance Evaluation of Seawater-Mixed Mortar under Carbonation Exposure for Sustainable Repair Applications
Pinta Astuti
; Adinda Dewi Puspitasari
; Ahmad Choiry Fajar
; Anisa Zulkarnain
; Adhitya Yoga Purnama
Advance Sustainable Science, Engineering and Technology
Vol 7
, No 2
(2025)
Corrosion and carbonation pose significant risks to reinforced concrete structures, necessitating timely patch repairs, especially when using seawater-mixed mortar. This study evaluated the influence of binder type, cover thickness, corrosion protection methods, and exposure conditions on the durability of reinforced concrete. Specimens using Portland Pozzolan Cement (PPC) and Portland Composite Cement (PCC) with 3 cm and 5 cm cover depths were tested over 400 days. PCC exhibited superior corros...
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