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Article

Corn Cob Ash versus Sunflower Stalk Ash, Two Sustainable Raw Materials in an Analysis of Their Effects on the Concrete Properties

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Faculty of Civil Engineering and Building Services, “Gheorghe Asachi” Technical University of Iași, 700050 Iași, Romania
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Faculty of Civil Engineering, Transilvania University of Brașov, 500152 Brașov, Romania
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Faculty of Material Science and Engineering, “Gheorghe Asachi” Technical University of Iași, 700050 Iași, Romania
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Faculty of Architecture “G.M. Cantacuzino”, “Gheorghe Asachi” Technical University of Iași, 700050 Iași, Romania
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Author to whom correspondence should be addressed.
Academic Editors: Carlos Morón Fernández and Daniel Ferrández Vega
Materials 2022, 15(3), 868; https://doi.org/10.3390/ma15030868
Received: 20 December 2021 / Revised: 17 January 2022 / Accepted: 18 January 2022 / Published: 24 January 2022
The increased CO2 emissions determined by the cement industry led to continuous and intensive research on the discovery of sustainable raw materials with cementitious properties. One such raw material category is agricultural waste. This study involved research on the effects of corn cob ash and sunflower stalk ash, respectively, on compressive strength measured after 28 days and 3 months, the flexural and splitting tensile strengths, the resistance to repeated freeze–thaw cycles, and on the resistance to chemical attack of hydrochloric acid of the concrete. A 2.5% and 5% replacement of the cement volume with corn cob ash (CCA) of A and B quality was applied, and with sunflower stalk ash (SSA) at A and B quality, respectively. The obtained results revealed that CCA and SSA decreased the compressive and tensile strength, but led to higher resistance of the concrete on repeated freeze–thaw cycles and to hydrochloric acid. The mixes with 2.5% SSA at A quality obtained the best results regarding splitting the tensile strength and resistance to repeated freeze–thaw cycles, the mixes with 2.5% SSA at B quality led to the highest resistance to hydrochloric acid, and those with 2.5% CCA at A quality led to the best values of compressive strength and flexural tensile strength. View Full-Text
Keywords: agro-waste; eco-friendly material; sustainable building materials; ecological concrete agro-waste; eco-friendly material; sustainable building materials; ecological concrete
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MDPI and ACS Style

Șerbănoiu, A.A.; Grădinaru, C.M.; Muntean, R.; Cimpoeșu, N.; Șerbănoiu, B.V. Corn Cob Ash versus Sunflower Stalk Ash, Two Sustainable Raw Materials in an Analysis of Their Effects on the Concrete Properties. Materials 2022, 15, 868. https://doi.org/10.3390/ma15030868

AMA Style

Șerbănoiu AA, Grădinaru CM, Muntean R, Cimpoeșu N, Șerbănoiu BV. Corn Cob Ash versus Sunflower Stalk Ash, Two Sustainable Raw Materials in an Analysis of Their Effects on the Concrete Properties. Materials. 2022; 15(3):868. https://doi.org/10.3390/ma15030868

Chicago/Turabian Style

Șerbănoiu, Adrian Alexandru, Cătălina Mihaela Grădinaru, Radu Muntean, Nicanor Cimpoeșu, and Bogdan Vasile Șerbănoiu. 2022. "Corn Cob Ash versus Sunflower Stalk Ash, Two Sustainable Raw Materials in an Analysis of Their Effects on the Concrete Properties" Materials 15, no. 3: 868. https://doi.org/10.3390/ma15030868

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