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Concrete by Preplaced Aggregate Method Using Silica Fume and Polypropylene Fibres

Preplaced aggregate concrete (PAC) is prepared in two steps, with the coarse aggregate being initially laid down in the formwork, after which a specialised grout is injected into it. To enhance the properties of concrete and to reduce the emission of CO(2) produced during the production of cement, s...

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Autores principales: Khanzada, Farooq Azam, Nazir, Kashif, Ishtiaq, Muhammad, Javed, Muhammad Faisal, Kashif-ur-Rehman, Sardar, Aslam, Fahid, Musarat, Muhammad Ali, Usanova, Kseniia Iurevna
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8949887/
https://www.ncbi.nlm.nih.gov/pubmed/35329449
http://dx.doi.org/10.3390/ma15061997
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author Khanzada, Farooq Azam
Nazir, Kashif
Ishtiaq, Muhammad
Javed, Muhammad Faisal
Kashif-ur-Rehman, Sardar
Aslam, Fahid
Musarat, Muhammad Ali
Usanova, Kseniia Iurevna
author_facet Khanzada, Farooq Azam
Nazir, Kashif
Ishtiaq, Muhammad
Javed, Muhammad Faisal
Kashif-ur-Rehman, Sardar
Aslam, Fahid
Musarat, Muhammad Ali
Usanova, Kseniia Iurevna
author_sort Khanzada, Farooq Azam
collection PubMed
description Preplaced aggregate concrete (PAC) is prepared in two steps, with the coarse aggregate being initially laid down in the formwork, after which a specialised grout is injected into it. To enhance the properties of concrete and to reduce the emission of CO(2) produced during the production of cement, supplementary cementitious materials (SCMs) are used to partially substitute ordinary Portland cement (OPC). In this study, 100 mm × 200 mm (diameter x height) PAC cylinders were cast with 10 per cent of cement being substituted with silica fume; along with that, 1.5% dosage of Macro polypropylene fibres were also introduced into the coarse aggregate matrix. Compressive strength test, splitting tensile strength test, mass loss at 250 °C, and compressive strength at 250 °C were performed on the samples. PAC samples with 10% of cement replaced with Silica Fume (SPAC) were used as control samples. The primary objective of this study was to observe the effect of the addition of Polypropylene fibres to PAC having Silica fume as SCM (FRPAC). The aforementioned tests showed that FRPAC had a lower compressive strength than that of the control mix (SPAC). FRPAC had greater tensile strength than that of NPAC and SPAC. Mass loss at 250 °C was greater in SPAC compared to FRPAC. The compressive strength loss at 250 °C was significantly greater in FRPAC compared to SPAC. FRPAC exhibited a greater strain for the applied stress, and their stress-strain curve showed that FRPAC was more ductile than SPAC.
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spelling pubmed-89498872022-03-26 Concrete by Preplaced Aggregate Method Using Silica Fume and Polypropylene Fibres Khanzada, Farooq Azam Nazir, Kashif Ishtiaq, Muhammad Javed, Muhammad Faisal Kashif-ur-Rehman, Sardar Aslam, Fahid Musarat, Muhammad Ali Usanova, Kseniia Iurevna Materials (Basel) Article Preplaced aggregate concrete (PAC) is prepared in two steps, with the coarse aggregate being initially laid down in the formwork, after which a specialised grout is injected into it. To enhance the properties of concrete and to reduce the emission of CO(2) produced during the production of cement, supplementary cementitious materials (SCMs) are used to partially substitute ordinary Portland cement (OPC). In this study, 100 mm × 200 mm (diameter x height) PAC cylinders were cast with 10 per cent of cement being substituted with silica fume; along with that, 1.5% dosage of Macro polypropylene fibres were also introduced into the coarse aggregate matrix. Compressive strength test, splitting tensile strength test, mass loss at 250 °C, and compressive strength at 250 °C were performed on the samples. PAC samples with 10% of cement replaced with Silica Fume (SPAC) were used as control samples. The primary objective of this study was to observe the effect of the addition of Polypropylene fibres to PAC having Silica fume as SCM (FRPAC). The aforementioned tests showed that FRPAC had a lower compressive strength than that of the control mix (SPAC). FRPAC had greater tensile strength than that of NPAC and SPAC. Mass loss at 250 °C was greater in SPAC compared to FRPAC. The compressive strength loss at 250 °C was significantly greater in FRPAC compared to SPAC. FRPAC exhibited a greater strain for the applied stress, and their stress-strain curve showed that FRPAC was more ductile than SPAC. MDPI 2022-03-08 /pmc/articles/PMC8949887/ /pubmed/35329449 http://dx.doi.org/10.3390/ma15061997 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Khanzada, Farooq Azam
Nazir, Kashif
Ishtiaq, Muhammad
Javed, Muhammad Faisal
Kashif-ur-Rehman, Sardar
Aslam, Fahid
Musarat, Muhammad Ali
Usanova, Kseniia Iurevna
Concrete by Preplaced Aggregate Method Using Silica Fume and Polypropylene Fibres
title Concrete by Preplaced Aggregate Method Using Silica Fume and Polypropylene Fibres
title_full Concrete by Preplaced Aggregate Method Using Silica Fume and Polypropylene Fibres
title_fullStr Concrete by Preplaced Aggregate Method Using Silica Fume and Polypropylene Fibres
title_full_unstemmed Concrete by Preplaced Aggregate Method Using Silica Fume and Polypropylene Fibres
title_short Concrete by Preplaced Aggregate Method Using Silica Fume and Polypropylene Fibres
title_sort concrete by preplaced aggregate method using silica fume and polypropylene fibres
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8949887/
https://www.ncbi.nlm.nih.gov/pubmed/35329449
http://dx.doi.org/10.3390/ma15061997
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