Pramudiyanto, S.A. Kristiawan, S. Sangadji, E. Safitri
This study investigate the sorptivity characteristics of High-Volume Fly-Ash Self-Compacting Concrete (HVFA-SCC) with fly ash replacement levels of 0%, 50%, 65%, 75%, tarteting a 35MPa compressive strength. Sorptivity, a critical durability in-dicator, was measured per ASTM C1585-20 to assess capillary water absorption. The 50% fly ash mix exhibited the lowest initial sorptivity (S1=0.0088mm/s), a 42% reduction compared to the control (0% fly ash), due to enhanced pore refinement from pozzolanic reactions. Conversely, the 65% and 75% mixes showed higher initial sorptivity (S1=0.0109mm/s and 0.0185mm/s) due to cement dilution. Notably, the 75% fly ash mix displayed an exceptionally low secondary sorptivity (S2=0.00007mm/s), suggesting long-term durability potential. Statistical analysis confirmed significant differences (p<0.05). The 50% fly ash mix balances durability and sustainability, ideal for water-exposed structures like marine infrastructure. Higher fly ash contents require extended curing to optimize early-age performance. These findings support HVFA-SCC as a sustainable alternative for durable concrete applications in Indonesia. © Published under licence by IOP Publishing Ltd.
Doctoral Study Program on Civil Engineering, Sebelas Maret University, Surakarta, Indonesia; Department of Civil Engineering and Planning Education, State University of Yogyakarta, Yogyakarta, Indonesia; Department of Civil Engineering, Sebelas Maret University, Surakarta, Indonesia
