The paper presents results of a study on concrete mixes containing two types of calcined clay pozzolanas obtained from Mankranso and Tanoso for structural application. Mankranso sample is labeled Type I whilst Tanoso also labeled as type II.Both clay samples were analysed to determine their physical and geotechnical properties whilst the chemical composition of the calcined clay samples analysed. Portland cement was replaced with 0%-25%Type I and 0-30% of Type II pozzolanas to formulate binder pastes and concretes. Setting times and normal consistency test were determined on the formulated binder paste. Three grades of concrete (25N/mm2, 30N/mm2 and 40N/mm2) containing pozzolana were prepared and their workability, density, compressive strength and flexural strength investigated against the plain concrete. Concretes with clay pozzolana had delayed setting times and lower densities. They also exhibited a reduction in compressive and tensile strength development at early age (7 days), with an average drop of 6 percent in compressive strength for all grades. However, the compressive and tensile strengths beyond 28 days notably exceeded the control un-blended mixes. This study recommends up to 20% clay pozzolana content of both Types I and II for concrete grades of 25N/mm2, 30N/mm2 and 40N/mm2.
| Published in | International Journal of Materials Science and Applications (Volume 3, Issue 6) |
| DOI | 10.11648/j.ijmsa.20140306.30 |
| Page(s) | 410-419 |
| 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 |
Concrete, Calcined Clay, Normal Consistency, Concrete Grade, Compressive Strength, Flexural Strength, Setting Times, Workability
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APA Style
Eric Opoku Amankwah, Mark Bediako, C. K. Kankam. (2015). Influence of Calcined Clay Pozzolana on Strength Characteristics of Portland Cement Concrete. International Journal of Materials Science and Applications, 3(6), 410-419. https://doi.org/10.11648/j.ijmsa.20140306.30
ACS Style
Eric Opoku Amankwah; Mark Bediako; C. K. Kankam. Influence of Calcined Clay Pozzolana on Strength Characteristics of Portland Cement Concrete. Int. J. Mater. Sci. Appl. 2015, 3(6), 410-419. doi: 10.11648/j.ijmsa.20140306.30
AMA Style
Eric Opoku Amankwah, Mark Bediako, C. K. Kankam. Influence of Calcined Clay Pozzolana on Strength Characteristics of Portland Cement Concrete. Int J Mater Sci Appl. 2015;3(6):410-419. doi: 10.11648/j.ijmsa.20140306.30
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Download@article{10.11648/j.ijmsa.20140306.30,
author = {Eric Opoku Amankwah and Mark Bediako and C. K. Kankam},
title = {Influence of Calcined Clay Pozzolana on Strength Characteristics of Portland Cement Concrete},
journal = {International Journal of Materials Science and Applications},
volume = {3},
number = {6},
pages = {410-419},
doi = {10.11648/j.ijmsa.20140306.30},
url = {https://doi.org/10.11648/j.ijmsa.20140306.30},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmsa.20140306.30},
abstract = {The paper presents results of a study on concrete mixes containing two types of calcined clay pozzolanas obtained from Mankranso and Tanoso for structural application. Mankranso sample is labeled Type I whilst Tanoso also labeled as type II.Both clay samples were analysed to determine their physical and geotechnical properties whilst the chemical composition of the calcined clay samples analysed. Portland cement was replaced with 0%-25%Type I and 0-30% of Type II pozzolanas to formulate binder pastes and concretes. Setting times and normal consistency test were determined on the formulated binder paste. Three grades of concrete (25N/mm2, 30N/mm2 and 40N/mm2) containing pozzolana were prepared and their workability, density, compressive strength and flexural strength investigated against the plain concrete. Concretes with clay pozzolana had delayed setting times and lower densities. They also exhibited a reduction in compressive and tensile strength development at early age (7 days), with an average drop of 6 percent in compressive strength for all grades. However, the compressive and tensile strengths beyond 28 days notably exceeded the control un-blended mixes. This study recommends up to 20% clay pozzolana content of both Types I and II for concrete grades of 25N/mm2, 30N/mm2 and 40N/mm2.},
year = {2015}
}
TY - JOUR T1 - Influence of Calcined Clay Pozzolana on Strength Characteristics of Portland Cement Concrete AU - Eric Opoku Amankwah AU - Mark Bediako AU - C. K. Kankam Y1 - 2015/01/06 PY - 2015 N1 - https://doi.org/10.11648/j.ijmsa.20140306.30 DO - 10.11648/j.ijmsa.20140306.30 T2 - International Journal of Materials Science and Applications JF - International Journal of Materials Science and Applications JO - International Journal of Materials Science and Applications SP - 410 EP - 419 PB - Science Publishing Group SN - 2327-2643 UR - https://doi.org/10.11648/j.ijmsa.20140306.30 AB - The paper presents results of a study on concrete mixes containing two types of calcined clay pozzolanas obtained from Mankranso and Tanoso for structural application. Mankranso sample is labeled Type I whilst Tanoso also labeled as type II.Both clay samples were analysed to determine their physical and geotechnical properties whilst the chemical composition of the calcined clay samples analysed. Portland cement was replaced with 0%-25%Type I and 0-30% of Type II pozzolanas to formulate binder pastes and concretes. Setting times and normal consistency test were determined on the formulated binder paste. Three grades of concrete (25N/mm2, 30N/mm2 and 40N/mm2) containing pozzolana were prepared and their workability, density, compressive strength and flexural strength investigated against the plain concrete. Concretes with clay pozzolana had delayed setting times and lower densities. They also exhibited a reduction in compressive and tensile strength development at early age (7 days), with an average drop of 6 percent in compressive strength for all grades. However, the compressive and tensile strengths beyond 28 days notably exceeded the control un-blended mixes. This study recommends up to 20% clay pozzolana content of both Types I and II for concrete grades of 25N/mm2, 30N/mm2 and 40N/mm2. VL - 3 IS - 6 ER -
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