Impact of variations in the molarity of sodium hydroxide on metakaolin-ground granular blast-furnace slag-based geopolymer concrete

The present study investigates the optimization of geopolymer concrete mixes with the addition of metakaolin and ground granular blast-furnace slag as binding agents, ensuring a sustainable and eco-friendly alternative to conventional concrete. In this study, different proportions of the input param...

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Main Authors: Rahul Kumar, Rajwinder Singh, Mahesh Patel
Format: Article
Language:English
Published: Josip Juraj Strossmayer University of Osijek, Faculty of Civil Engineering and Architecture Osijek, Croatia 2024-01-01
Series:Advances in Civil and Architectural Engineering
Subjects:
Online Access:https://hrcak.srce.hr/ojs/index.php/acae/article/view/28364/16675
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author Rahul Kumar
Rajwinder Singh
Mahesh Patel
author_facet Rahul Kumar
Rajwinder Singh
Mahesh Patel
author_sort Rahul Kumar
collection DOAJ
description The present study investigates the optimization of geopolymer concrete mixes with the addition of metakaolin and ground granular blast-furnace slag as binding agents, ensuring a sustainable and eco-friendly alternative to conventional concrete. In this study, different proportions of the input parameters, such as the molarity of sodium hydroxide, ratio of sodium silicate to sodium hydroxide, and ratio of fixed alkali activator to binder have been considered. Attributes such as compressive strength, ultra-sonic pulse velocity, electricity resistance, mass loss, and strength variation due to acid attack for six geopolymer concrete mixes have been evaluated at different ambient curing periods. In addition, the mathematical relationship, i.e., linear regression, between these properties was also evaluated. The results show that a sodium silicate to sodium hydroxide ratio of 1,8; n sodium-hydroxide molarity of 14, and an alkali activator to binder ratio of 0,45 demonstrated the highest strength (43,3 MPa), electrical resistivity (35,1 K.Ohm.cm), and pulse velocity (4,2 km/s) with the minimal effect of H2SO4 solution on mass (1,2 %) and strength (5,8 %). Additionally, statistical analysis indicated a strong relationship of compressive strength with other properties, which improved as the curing days extended from 28 (Avg. R2=0,68) to 56 (Avg. R2=0,74) days. The outcomes of the study are expected to contribute to the advancement of sustainable construction by providing relevant data regarding material selection, ensuring quality, and optimizing geopolymer concrete production with metakaolin and ground granular blast-furnace slag.
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issn 2975-3848
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publishDate 2024-01-01
publisher Josip Juraj Strossmayer University of Osijek, Faculty of Civil Engineering and Architecture Osijek, Croatia
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spelling doaj-art-7a1b767bef4140ba8dcc7b33bd24cdfd2025-01-10T09:28:58ZengJosip Juraj Strossmayer University of Osijek, Faculty of Civil Engineering and Architecture Osijek, CroatiaAdvances in Civil and Architectural Engineering2975-38482024-01-011529466610.13167/2024.29.4Impact of variations in the molarity of sodium hydroxide on metakaolin-ground granular blast-furnace slag-based geopolymer concreteRahul Kumar0Rajwinder Singh1Mahesh Patel2Indian Institute of Technology, Department of civil engineering, Guwahati, Assam, IndiaDr. B. R. Ambedkar National Institute of Technology, Jalandhar, Punjab, IndiaDr. B. R. Ambedkar National Institute of Technology, Jalandhar, Punjab, IndiaThe present study investigates the optimization of geopolymer concrete mixes with the addition of metakaolin and ground granular blast-furnace slag as binding agents, ensuring a sustainable and eco-friendly alternative to conventional concrete. In this study, different proportions of the input parameters, such as the molarity of sodium hydroxide, ratio of sodium silicate to sodium hydroxide, and ratio of fixed alkali activator to binder have been considered. Attributes such as compressive strength, ultra-sonic pulse velocity, electricity resistance, mass loss, and strength variation due to acid attack for six geopolymer concrete mixes have been evaluated at different ambient curing periods. In addition, the mathematical relationship, i.e., linear regression, between these properties was also evaluated. The results show that a sodium silicate to sodium hydroxide ratio of 1,8; n sodium-hydroxide molarity of 14, and an alkali activator to binder ratio of 0,45 demonstrated the highest strength (43,3 MPa), electrical resistivity (35,1 K.Ohm.cm), and pulse velocity (4,2 km/s) with the minimal effect of H2SO4 solution on mass (1,2 %) and strength (5,8 %). Additionally, statistical analysis indicated a strong relationship of compressive strength with other properties, which improved as the curing days extended from 28 (Avg. R2=0,68) to 56 (Avg. R2=0,74) days. The outcomes of the study are expected to contribute to the advancement of sustainable construction by providing relevant data regarding material selection, ensuring quality, and optimizing geopolymer concrete production with metakaolin and ground granular blast-furnace slag.https://hrcak.srce.hr/ojs/index.php/acae/article/view/28364/16675geopolymer concretemetakaolinground granular blast-furnace slagcompressive strength
spellingShingle Rahul Kumar
Rajwinder Singh
Mahesh Patel
Impact of variations in the molarity of sodium hydroxide on metakaolin-ground granular blast-furnace slag-based geopolymer concrete
Advances in Civil and Architectural Engineering
geopolymer concrete
metakaolin
ground granular blast-furnace slag
compressive strength
title Impact of variations in the molarity of sodium hydroxide on metakaolin-ground granular blast-furnace slag-based geopolymer concrete
title_full Impact of variations in the molarity of sodium hydroxide on metakaolin-ground granular blast-furnace slag-based geopolymer concrete
title_fullStr Impact of variations in the molarity of sodium hydroxide on metakaolin-ground granular blast-furnace slag-based geopolymer concrete
title_full_unstemmed Impact of variations in the molarity of sodium hydroxide on metakaolin-ground granular blast-furnace slag-based geopolymer concrete
title_short Impact of variations in the molarity of sodium hydroxide on metakaolin-ground granular blast-furnace slag-based geopolymer concrete
title_sort impact of variations in the molarity of sodium hydroxide on metakaolin ground granular blast furnace slag based geopolymer concrete
topic geopolymer concrete
metakaolin
ground granular blast-furnace slag
compressive strength
url https://hrcak.srce.hr/ojs/index.php/acae/article/view/28364/16675
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AT maheshpatel impactofvariationsinthemolarityofsodiumhydroxideonmetakaolingroundgranularblastfurnaceslagbasedgeopolymerconcrete