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Corresponding Author

Venu Sipelli

Subject Area

Civil and Environmental Engineering

Article Type

Special Issue Original Study

Abstract

SDC is a self-flowing concrete that demonstrates improved material efficiency through optimized aggregate gradation. Unlike SCC, which relies on high powder content for improved flowability, SDC provides improved flowability by optimized aggregate gradation, making it a promising alternative to SCC. This paper presents the fresh, mechanical, and durability performance of M40-grade SDC using OPC 53 grade cement, GGBS, CRF, and polycarboxylate-based superplasticizer. A constant cementitious content of 470 kg/m³ and water–cement ratio of 0.38 were maintained. The fresh, mechanical, and durability performances of SDC using three types of coarse aggregate combinations, namely, 70% 10 mm + 30% 20 mm, 75% 10 mm + 25% 20 mm, and 80% 10 mm + 20% 20 mm, were investigated. Slump flows of 560 mm, 610 mm, and 640 mm show improved flowability with reduced 20 mm aggregate content. Accordingly, the compressive strengths of 55.74 MPa, 52.43 MPa, and 50.23 MPa were achieved at 28 days. UPV values were in the range of 3.92 to 4.77 km/s. Water permeability and RCPT results indicated satisfactory durability for all the mixes. The results revealed that SDC is good enough to provide sufficient flowability, strength, and durability while reducing binder demand and improving cost efficiency. Among the investigated mixtures, the M3 mix (80% 10 mm + 20% 20 mm aggregate) demonstrated the most favorable overall performance in terms of flowability, strength, and durability.

Keywords

Smart dynamic concrete; Optimized aggregate gradation; Ground granulated blast furnace slag; Crushed rock fines; Flowability; Durability

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

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