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논문 기본 정보

자료유형
학술저널
저자정보
Benyamina, Smain (Geomaterials Laboratory, Department of Civil Engineering, University of Blida 1) Menadi, Belkacem (Geomaterials Laboratory, Department of Civil Engineering, University of Blida 1) Bernard, Siham Kamali (Laboratory of Civil Engineering and Mechanical Engineering, National Institute of Applied Sciences) Kenai, Said (Geomaterials Laboratory, Department of Civil Engineering, University of Blida 1)
저널정보
테크노프레스 Advances in concrete construction Advances in concrete construction 제7권 제2호
발행연도
2019.1
수록면
87 - 96 (10page)

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Self-compacting concretes (SCC) are highly fluid concrete which can flow without any vibration. Their composition requires a large quantity of fines to limit the risk of bleeding and segregation. The use of crushed sand rich in limestone fines could be an adequate solution for both economic and environmental reasons. This paper investigates the influence of quarry limestone fines from manufactured crushed sand on rheological, mechanical and durability properties of SCC. For this purpose, five mixtures of SCC with different limestone fines content as substitution of crushed sand (0, 5, 10, 15 and 20%) were prepared at constant water-to-cement ratio of 0.40 and $490kg/m^3$ of cement content. Fresh SCC mixtures were tested by slump flow test, V-funnel flow time test, L-box height ratio, segregation resistance and rheological test using a rheometer. Compressive and flexural strengths of SCC mixtures were evaluated at 28 days. Regarding durability properties, total porosity, capillary water absorption and chloride-ion migration were studied at 180 days. For the two test modes in fresh state, the results indicated compatibility between slump flow/yield stress (${\tau}_0$) and V-funnel flow time/plastic viscosity (${\mu}$). Increasing the substitution level of limestone fines in SCC mixtures, contributes to the decrease of the slump flow and the yield stress. All SCC mixtures investigated achieved adequate filling, adequate passing ability and exhibit no segregation. Moreover, the inclusion of limestone fines as crushed sand substitution reduces the capillary water absorption, chloride-ion migration and consequently enhances the durability performance.

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