Sustainable Concrete Containing Recycled Aggregates and Pozzolana in Sudan

Eltahir Elshiakh; Salma Mahmoud

doi:doi:10.11648/j.ajcbm.20200402.11

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Sustainable Concrete Containing Recycled Aggregates and Pozzolana in Sudan

Eltahir Elshiakh, Salma Mahmoud

Published in American Journal of Construction and Building Materials (Volume 4, Issue 2)

Received: 17 July 2020 Accepted: 3 August 2020 Published: 13 August 2020

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Abstract

Sustainable trails in the building industry called for preserving the natural resources through the production of green concrete. This is concrete where waste materials are used as at least one of its components, or its production does not lead to environmental destruction through the reduction, reuse or recycling techniques. Experimental results from a study on the potential usefulness of recycled coarse aggregates (RCA) blended with locally available natural Pozzolana are outlined in this paper. Eight concrete mix scenarios were considered: a standard mix with 100% natural coarse aggregates (NCA), 25% RCA, 50% RCA, 75%RCA, 100% RCA and no Pozzolana, 100% RCA and 10% Pozzolana, 100% RCA and 20% Pozzolana, 100% RCA and 30% Pozzolana. Slump test was conducted and the results were all within the specific limits. It was conversely realized that the workability decreased in the cases of replacing NCA by RCA with no Pozzolana while an increase was recognized when the Pozzolana was add in the different percentages with the best results achieved with 100% RCA and 20% Pozzolana. The compressive strength results were consistent for the different curing ages with the highest strength being acquired with the mix that contained 100%RCA and 10% Pozzolana. The results of the durability test revealed better values for the wave length speed value when the NCA was replaced by the RCA. Considering these outcomes, the optimum result was achieved in the case of 100%RCA and 10%Pozzolana. Thus, the experimental results offer good indication for a potential usefulness of RCA proposing a reasonable way for preserving virgin natural materials.

Published in	American Journal of Construction and Building Materials (Volume 4, Issue 2)
DOI	10.11648/j.ajcbm.20200402.11
Page(s)	33-38
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2020. Published by Science Publishing Group

Keywords

Compressive Strength, Pozzolana, Recycled Aggregates, Sudan, Workability

References

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[4]	Xiao, J., Fana, L. Y., & Huang, X. An overview of study on recycled aggregate concrete in China (1996–2011). Construction and Building Materials, 31, 364–383. (2012b).
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APA Style

Eltahir Elshiakh, Salma Mahmoud. (2020). Sustainable Concrete Containing Recycled Aggregates and Pozzolana in Sudan. American Journal of Construction and Building Materials, 4(2), 33-38. https://doi.org/10.11648/j.ajcbm.20200402.11

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ACS Style

Eltahir Elshiakh; Salma Mahmoud. Sustainable Concrete Containing Recycled Aggregates and Pozzolana in Sudan. Am. J. Constr. Build. Mater. 2020, 4(2), 33-38. doi: 10.11648/j.ajcbm.20200402.11

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AMA Style

Eltahir Elshiakh, Salma Mahmoud. Sustainable Concrete Containing Recycled Aggregates and Pozzolana in Sudan. Am J Constr Build Mater. 2020;4(2):33-38. doi: 10.11648/j.ajcbm.20200402.11

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@article{10.11648/j.ajcbm.20200402.11,
  author = {Eltahir Elshiakh and Salma Mahmoud},
  title = {Sustainable Concrete Containing Recycled Aggregates and Pozzolana in Sudan},
  journal = {American Journal of Construction and Building Materials},
  volume = {4},
  number = {2},
  pages = {33-38},
  doi = {10.11648/j.ajcbm.20200402.11},
  url = {https://doi.org/10.11648/j.ajcbm.20200402.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajcbm.20200402.11},
  abstract = {Sustainable trails in the building industry called for preserving the natural resources through the production of green concrete. This is concrete where waste materials are used as at least one of its components, or its production does not lead to environmental destruction through the reduction, reuse or recycling techniques. Experimental results from a study on the potential usefulness of recycled coarse aggregates (RCA) blended with locally available natural Pozzolana are outlined in this paper. Eight concrete mix scenarios were considered: a standard mix with 100% natural coarse aggregates (NCA), 25% RCA, 50% RCA, 75%RCA, 100% RCA and no Pozzolana, 100% RCA and 10% Pozzolana, 100% RCA and 20% Pozzolana, 100% RCA and 30% Pozzolana. Slump test was conducted and the results were all within the specific limits. It was conversely realized that the workability decreased in the cases of replacing NCA by RCA with no Pozzolana while an increase was recognized when the Pozzolana was add in the different percentages with the best results achieved with 100% RCA and 20% Pozzolana. The compressive strength results were consistent for the different curing ages with the highest strength being acquired with the mix that contained 100%RCA and 10% Pozzolana. The results of the durability test revealed better values for the wave length speed value when the NCA was replaced by the RCA. Considering these outcomes, the optimum result was achieved in the case of 100%RCA and 10%Pozzolana. Thus, the experimental results offer good indication for a potential usefulness of RCA proposing a reasonable way for preserving virgin natural materials.},
 year = {2020}
}

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TY  - JOUR
T1  - Sustainable Concrete Containing Recycled Aggregates and Pozzolana in Sudan
AU  - Eltahir Elshiakh
AU  - Salma Mahmoud
Y1  - 2020/08/13
PY  - 2020
N1  - https://doi.org/10.11648/j.ajcbm.20200402.11
DO  - 10.11648/j.ajcbm.20200402.11
T2  - American Journal of Construction and Building Materials
JF  - American Journal of Construction and Building Materials
JO  - American Journal of Construction and Building Materials
SP  - 33
EP  - 38
PB  - Science Publishing Group
SN  - 2640-0057
UR  - https://doi.org/10.11648/j.ajcbm.20200402.11
AB  - Sustainable trails in the building industry called for preserving the natural resources through the production of green concrete. This is concrete where waste materials are used as at least one of its components, or its production does not lead to environmental destruction through the reduction, reuse or recycling techniques. Experimental results from a study on the potential usefulness of recycled coarse aggregates (RCA) blended with locally available natural Pozzolana are outlined in this paper. Eight concrete mix scenarios were considered: a standard mix with 100% natural coarse aggregates (NCA), 25% RCA, 50% RCA, 75%RCA, 100% RCA and no Pozzolana, 100% RCA and 10% Pozzolana, 100% RCA and 20% Pozzolana, 100% RCA and 30% Pozzolana. Slump test was conducted and the results were all within the specific limits. It was conversely realized that the workability decreased in the cases of replacing NCA by RCA with no Pozzolana while an increase was recognized when the Pozzolana was add in the different percentages with the best results achieved with 100% RCA and 20% Pozzolana. The compressive strength results were consistent for the different curing ages with the highest strength being acquired with the mix that contained 100%RCA and 10% Pozzolana. The results of the durability test revealed better values for the wave length speed value when the NCA was replaced by the RCA. Considering these outcomes, the optimum result was achieved in the case of 100%RCA and 10%Pozzolana. Thus, the experimental results offer good indication for a potential usefulness of RCA proposing a reasonable way for preserving virgin natural materials.
VL  - 4
IS  - 2
ER  -

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Author Information

Eltahir Elshiakh

Construction Engineering Department, Sudan University of Science & Technology, Khartoum, Sudan
Salma Mahmoud

Civil Engineering Department, University of Science & Technology, Omdurman, Sudan

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APA Style

Eltahir Elshiakh, Salma Mahmoud. (2020). Sustainable Concrete Containing Recycled Aggregates and Pozzolana in Sudan. American Journal of Construction and Building Materials, 4(2), 33-38. https://doi.org/10.11648/j.ajcbm.20200402.11

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ACS Style

Eltahir Elshiakh; Salma Mahmoud. Sustainable Concrete Containing Recycled Aggregates and Pozzolana in Sudan. Am. J. Constr. Build. Mater. 2020, 4(2), 33-38. doi: 10.11648/j.ajcbm.20200402.11

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AMA Style

Eltahir Elshiakh, Salma Mahmoud. Sustainable Concrete Containing Recycled Aggregates and Pozzolana in Sudan. Am J Constr Build Mater. 2020;4(2):33-38. doi: 10.11648/j.ajcbm.20200402.11

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@article{10.11648/j.ajcbm.20200402.11,
  author = {Eltahir Elshiakh and Salma Mahmoud},
  title = {Sustainable Concrete Containing Recycled Aggregates and Pozzolana in Sudan},
  journal = {American Journal of Construction and Building Materials},
  volume = {4},
  number = {2},
  pages = {33-38},
  doi = {10.11648/j.ajcbm.20200402.11},
  url = {https://doi.org/10.11648/j.ajcbm.20200402.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajcbm.20200402.11},
  abstract = {Sustainable trails in the building industry called for preserving the natural resources through the production of green concrete. This is concrete where waste materials are used as at least one of its components, or its production does not lead to environmental destruction through the reduction, reuse or recycling techniques. Experimental results from a study on the potential usefulness of recycled coarse aggregates (RCA) blended with locally available natural Pozzolana are outlined in this paper. Eight concrete mix scenarios were considered: a standard mix with 100% natural coarse aggregates (NCA), 25% RCA, 50% RCA, 75%RCA, 100% RCA and no Pozzolana, 100% RCA and 10% Pozzolana, 100% RCA and 20% Pozzolana, 100% RCA and 30% Pozzolana. Slump test was conducted and the results were all within the specific limits. It was conversely realized that the workability decreased in the cases of replacing NCA by RCA with no Pozzolana while an increase was recognized when the Pozzolana was add in the different percentages with the best results achieved with 100% RCA and 20% Pozzolana. The compressive strength results were consistent for the different curing ages with the highest strength being acquired with the mix that contained 100%RCA and 10% Pozzolana. The results of the durability test revealed better values for the wave length speed value when the NCA was replaced by the RCA. Considering these outcomes, the optimum result was achieved in the case of 100%RCA and 10%Pozzolana. Thus, the experimental results offer good indication for a potential usefulness of RCA proposing a reasonable way for preserving virgin natural materials.},
 year = {2020}
}

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TY  - JOUR
T1  - Sustainable Concrete Containing Recycled Aggregates and Pozzolana in Sudan
AU  - Eltahir Elshiakh
AU  - Salma Mahmoud
Y1  - 2020/08/13
PY  - 2020
N1  - https://doi.org/10.11648/j.ajcbm.20200402.11
DO  - 10.11648/j.ajcbm.20200402.11
T2  - American Journal of Construction and Building Materials
JF  - American Journal of Construction and Building Materials
JO  - American Journal of Construction and Building Materials
SP  - 33
EP  - 38
PB  - Science Publishing Group
SN  - 2640-0057
UR  - https://doi.org/10.11648/j.ajcbm.20200402.11
AB  - Sustainable trails in the building industry called for preserving the natural resources through the production of green concrete. This is concrete where waste materials are used as at least one of its components, or its production does not lead to environmental destruction through the reduction, reuse or recycling techniques. Experimental results from a study on the potential usefulness of recycled coarse aggregates (RCA) blended with locally available natural Pozzolana are outlined in this paper. Eight concrete mix scenarios were considered: a standard mix with 100% natural coarse aggregates (NCA), 25% RCA, 50% RCA, 75%RCA, 100% RCA and no Pozzolana, 100% RCA and 10% Pozzolana, 100% RCA and 20% Pozzolana, 100% RCA and 30% Pozzolana. Slump test was conducted and the results were all within the specific limits. It was conversely realized that the workability decreased in the cases of replacing NCA by RCA with no Pozzolana while an increase was recognized when the Pozzolana was add in the different percentages with the best results achieved with 100% RCA and 20% Pozzolana. The compressive strength results were consistent for the different curing ages with the highest strength being acquired with the mix that contained 100%RCA and 10% Pozzolana. The results of the durability test revealed better values for the wave length speed value when the NCA was replaced by the RCA. Considering these outcomes, the optimum result was achieved in the case of 100%RCA and 10%Pozzolana. Thus, the experimental results offer good indication for a potential usefulness of RCA proposing a reasonable way for preserving virgin natural materials.
VL  - 4
IS  - 2
ER  -

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