An innovative self-healing engineered cementitious composite containing nanoclay and superabsorbent polymer: mechanical, durability, and thermal performance
Date
2025
Authors
Bahrami, N.
Mirjalili, A.
Manshadi, H.D.
Sanaei Ataabadi, H.
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Journal of Materials in Civil Engineering, 2025; 37(12, article no. 04025429):1-12
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Abstract
A comprehensive investigation was conducted into the mechanical, durability, and healing efficiency of engineered cementitious composite (ECC) formulations containing a mix of fly ash (FA), nanoclay (NC), and superabsorbent polymer (SAP). The research also investigated the effects of temperatures up to 600°C on ECC mixes. Results indicated that incorporation of NC and SAP provides mechanical properties comparable to those of plain ECC due to the combination of the filler effect of NC and the water retention of SAP. The ECC containing a mix of NC and SAP had a higher flexural strength recovery rate (120%) than the control samples (90%). The findings indicated that although increasing the fly ash content reduces the mechanical properties, the addition of Type C fly ash, NC, and SAP resulted in as much as 80% self-healing after 56 days. The flexural capacity of healed samples with optimal SAP content and 0.5% NC was 30% higher than that of the control. ECC containing NC and SAP at elevated temperatures had less degradation of weight, compressive strength, and flexural strength.
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Copyright 2025 American Society of Civil Engineers