Calcined clay pozzolan, the major mineral admixture used in Ghana to partially substitute ordinary Portland cement has gained massive recognition in the local construction industry because of its technical advantages and affordability. The most prominent undesirable property associated with the use of calcined clay pozzolans is slow setting and strength development, especially at early ages. This paper presents a study of the effect of Na2SO4 on the mechanical properties of high volume pozzolan cements. The cements containing 30 wt. %, 40 wt. %, 50 wt. % and 60 wt. % calcined clay pozzolan was activated with 1%, 2%, 3% and 4% Na2SO4. Some physical properties such as Blaine index, specific gravity, water demand and setting times were determined. The chemical compositions of the blended cements were also analyzed. The effect of Na2SO4 on compressive strength of blended cements was determined after 2, 7, 28 and 180 days. Durability studies on activated blended cements in aggressive media were also conducted. Activation with a minimum of 2% Na2SO4 improved the 2 days compressive strength of cement containing 60% calcined clay pozzolan by 66.2% and caused it to behave as Class 32.5N cement, at 28 days. As Na2SO4 dosage increased, compressive strength also increased. The optimum Na2SO4 dosage was 2%. Activated blended cements resisted MgSO4 environment better than unactivated cements
| Published in | American Journal of Mechanical and Materials Engineering (Volume 1, Issue 3) |
| DOI | 10.11648/j.ajmme.20170103.13 |
| Page(s) | 78-82 |
| 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), 2024. Published by Science Publishing Group |
Pozzolan Cement, Activation, Admixture, Durability, Compressive Strength, Setting Time
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APA Style
Kwabena Appiah Boakye, Albert Amartey Adjaottor, Trinity Ama Tagbor, Delali Adjei. (2017). Influence of Na2SO4 on the Mechanical Properties of High Volume Calcined Clay Pozzolan Cement. American Journal of Mechanical and Materials Engineering, 1(3), 78-82. https://doi.org/10.11648/j.ajmme.20170103.13
ACS Style
Kwabena Appiah Boakye; Albert Amartey Adjaottor; Trinity Ama Tagbor; Delali Adjei. Influence of Na2SO4 on the Mechanical Properties of High Volume Calcined Clay Pozzolan Cement. Am. J. Mech. Mater. Eng. 2017, 1(3), 78-82. doi: 10.11648/j.ajmme.20170103.13
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Download@article{10.11648/j.ajmme.20170103.13,
author = {Kwabena Appiah Boakye and Albert Amartey Adjaottor and Trinity Ama Tagbor and Delali Adjei},
title = {Influence of Na2SO4 on the Mechanical Properties of High Volume Calcined Clay Pozzolan Cement},
journal = {American Journal of Mechanical and Materials Engineering},
volume = {1},
number = {3},
pages = {78-82},
doi = {10.11648/j.ajmme.20170103.13},
url = {https://doi.org/10.11648/j.ajmme.20170103.13},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajmme.20170103.13},
abstract = {Calcined clay pozzolan, the major mineral admixture used in Ghana to partially substitute ordinary Portland cement has gained massive recognition in the local construction industry because of its technical advantages and affordability. The most prominent undesirable property associated with the use of calcined clay pozzolans is slow setting and strength development, especially at early ages. This paper presents a study of the effect of Na2SO4 on the mechanical properties of high volume pozzolan cements. The cements containing 30 wt. %, 40 wt. %, 50 wt. % and 60 wt. % calcined clay pozzolan was activated with 1%, 2%, 3% and 4% Na2SO4. Some physical properties such as Blaine index, specific gravity, water demand and setting times were determined. The chemical compositions of the blended cements were also analyzed. The effect of Na2SO4 on compressive strength of blended cements was determined after 2, 7, 28 and 180 days. Durability studies on activated blended cements in aggressive media were also conducted. Activation with a minimum of 2% Na2SO4 improved the 2 days compressive strength of cement containing 60% calcined clay pozzolan by 66.2% and caused it to behave as Class 32.5N cement, at 28 days. As Na2SO4 dosage increased, compressive strength also increased. The optimum Na2SO4 dosage was 2%. Activated blended cements resisted MgSO4 environment better than unactivated cements},
year = {2017}
}
TY - JOUR T1 - Influence of Na2SO4 on the Mechanical Properties of High Volume Calcined Clay Pozzolan Cement AU - Kwabena Appiah Boakye AU - Albert Amartey Adjaottor AU - Trinity Ama Tagbor AU - Delali Adjei Y1 - 2017/07/13 PY - 2017 N1 - https://doi.org/10.11648/j.ajmme.20170103.13 DO - 10.11648/j.ajmme.20170103.13 T2 - American Journal of Mechanical and Materials Engineering JF - American Journal of Mechanical and Materials Engineering JO - American Journal of Mechanical and Materials Engineering SP - 78 EP - 82 PB - Science Publishing Group SN - 2639-9652 UR - https://doi.org/10.11648/j.ajmme.20170103.13 AB - Calcined clay pozzolan, the major mineral admixture used in Ghana to partially substitute ordinary Portland cement has gained massive recognition in the local construction industry because of its technical advantages and affordability. The most prominent undesirable property associated with the use of calcined clay pozzolans is slow setting and strength development, especially at early ages. This paper presents a study of the effect of Na2SO4 on the mechanical properties of high volume pozzolan cements. The cements containing 30 wt. %, 40 wt. %, 50 wt. % and 60 wt. % calcined clay pozzolan was activated with 1%, 2%, 3% and 4% Na2SO4. Some physical properties such as Blaine index, specific gravity, water demand and setting times were determined. The chemical compositions of the blended cements were also analyzed. The effect of Na2SO4 on compressive strength of blended cements was determined after 2, 7, 28 and 180 days. Durability studies on activated blended cements in aggressive media were also conducted. Activation with a minimum of 2% Na2SO4 improved the 2 days compressive strength of cement containing 60% calcined clay pozzolan by 66.2% and caused it to behave as Class 32.5N cement, at 28 days. As Na2SO4 dosage increased, compressive strength also increased. The optimum Na2SO4 dosage was 2%. Activated blended cements resisted MgSO4 environment better than unactivated cements VL - 1 IS - 3 ER -
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