Recycling of foundry sand wastes in self-compacting concretes: Use as cementitious materials and fine aggregates

Ghania Sebki; Hamza Mechakra; Mohammed Saidi; Brahim Safi

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Recycling of foundry sand wastes in self-compacting concretes: Use as cementitious materials and fine aggregates

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| 25. Aug. 2023

Materials and Geoenvironment

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Article Category: Original Scientific Article

Online veröffentlicht: 25. Aug. 2023

Seitenbereich: -

Eingereicht: 29. Jan. 2023

Akzeptiert: 19. Mai 2023

DOI: https://doi.org/10.2478/rmzmag-2023-0004

Schlüsselwörter
foundry sand wastes, cement, self-compacting concrete, slump test, compressive and flexural strength, dynamic elastic modulus

© 2023 Ghania Sebki et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Foundry sand wastes used in this work: (a) rejected zone, (b) FSW as sand.

SEM images of used foundry sand waste: (a) at 400x magnitude, (b) at 100x magnitude.

Particle size distribution of natural sand and foundry sand wastes.

Particle size distribution of cement and crushed foundry sand in volume fraction obtained by Laser Granulometry: (a) cement, (b) crushed foundry sand waste.

Particle size distribution of cement and crushed foundry sand waste.

Pozzolanic activity of FSW obtained by the saturated lime test.

Particle size analysis by sieving of gravel 8/16.

Mixer and molds used for self-compacting concrete: (a) concrete mixer, (b) cubic samples (150×150×150 mm3), (c) prismatic samples (70×70×280 mm3).

Mechanical tests: (a) compressive, (b) flexural strength.

Fluidity concretes studied by sand substitution: (a) obtained result, (b) practical flow test of concrete.

Filling capacity of the concretes studied according to the rate of substitution of sand by FSW: (a) filling capacity of the concretes, (b) practical L-box test of self-compacting concrete.

Segregation index of the concretes studied according to the substitution rate of sand by FSW: (a) segregation index of the concretes, (b) segregation test of self-compacting concretes.

Mechanical strength development of studied self-compacting concretes: (a) compressive strength, (b) flexural strength tested at 28d.

Evolution of the dynamic elasticity coefficient of concretes according to the substitution rate of sand by FSW.

Fluidity of concretes studied by cement substitution.

Filling capacity of the concretes studied according to the substitution rate of cement by foundry sand waste.

Evolution of the mechanical strength of the concretes studied: (a) compressive strength, (b) flexural strength tested at 28d.

Dynamic elastic modulus of the concretes studied.

Physical properties of natural sand and foundry sand wastes.

	Natural Sand NS	Foundry Sand Wastes FSW
Apparent density (kg/m³)	3150	1240
Specific gravity (kg/m³)	2760	2400
Fineness modulus	2	2.47

Mixture details of self-compacting concrete (SCC).

Component [Kg/m³]	SCC
Cement *	500
Limestone fillers	118.1
Natural sand**	843.7
Water	216
Superplasticizer	7.5
Gravel 8/16	742.8

Chemical analysis of foundry sand wastes.

Compounds	CaO	SiO₂	Al₂O₃	Fe₂O₃	SO₃	Na₂O	K₂O	MgO	P₂O₅
(%)	6.328	60.762	11.688	9.642	1.851	0.010	1.281	2.195	0.010

Mixture details of self-compacting concrete (SCC): Cement substitution case.

Component [Kg/m³]	SCC0	SCC10	SCC20	SCC30
Cement *	500	450	400	350
Crushed FSW	0	50	100	150
Limestone fillers	118.1	118.1	118.1	118.1
Natural sand	844	844	844	844
Water	216	216	216	216
Superplasticizer	7.5	7.5	7.5	7.5
Gravel 8/16	742.8	742.8	742.8	742.8

Mixture details of self-compacting concrete (CFS): Sand substitution case.

Component [Kg/m³]	CFS0	CFS10	CFS30	CFS50
Cement	500	500	500	500
Limestone fillers	118.1	118.1	118.1	118.1
Natural sand**	844	844	844	844
Foundry sand waste	0	84.4	168.8	253
Water	216	216	216	216
Superplasticizer	7.5	7.5	7.5	7.5
Gravel 8/16	742.8	742.8	742.8	742.8

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Sprache:: Englisch

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Recycling of foundry sand wastes in self-compacting concretes: Use as cementitious materials and fine aggregates

Article Category: Original Scientific Article

Online veröffentlicht: 25. Aug. 2023

Seitenbereich: -

Eingereicht: 29. Jan. 2023

Akzeptiert: 19. Mai 2023

DOI: https://doi.org/10.2478/rmzmag-2023-0004

Schlüsselwörter
foundry sand wastes, cement, self-compacting concrete, slump test, compressive and flexural strength, dynamic elastic modulus

© 2023 Ghania Sebki et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Physical properties of natural sand and foundry sand wastes.

Mixture details of self-compacting concrete (SCC).

Chemical analysis of foundry sand wastes.

Mixture details of self-compacting concrete (SCC): Cement substitution case.

Mixture details of self-compacting concrete (CFS): Sand substitution case.

Recycling of foundry sand wastes in self-compacting concretes: Use as cementitious materials and fine aggregates

Article Category: Original Scientific Article

Online veröffentlicht: 25. Aug. 2023

Seitenbereich: -

Eingereicht: 29. Jan. 2023

Akzeptiert: 19. Mai 2023

DOI: https://doi.org/10.2478/rmzmag-2023-0004

Schlüsselwörterfoundry sand wastes, cement, self-compacting concrete, slump test, compressive and flexural strength, dynamic elastic modulus

© 2023 Ghania Sebki et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Physical properties of natural sand and foundry sand wastes.

Mixture details of self-compacting concrete (SCC).

Chemical analysis of foundry sand wastes.

Mixture details of self-compacting concrete (SCC): Cement substitution case.

Mixture details of self-compacting concrete (CFS): Sand substitution case.

Schlüsselwörter
foundry sand wastes, cement, self-compacting concrete, slump test, compressive and flexural strength, dynamic elastic modulus