Mechanical and Durability Properties of Mortars Incorporating Red Mud, Ground Granulated Blast Furnace Slag, and Electric Arc Furnace Dust
This research studies the properties of mortars incorporating waste materials including red mud (RM), ground granulated blast furnace slag (GGBFS), and electric arc furnace dust (EAFD). Ordinary Portland cement (OPC) was partially replaced with equal contents of RM, GGBFS, and EAFD at different rati...
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MDPI AG
2021-04-01
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| Online Access: | https://www.mdpi.com/2076-3417/11/9/4110 |
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| author | Javad Sabzi Elyas Asadi Shamsabadi Mansour Ghalehnovi S. Ali Hadigheh Ali Khodabakhshian Jorge de Brito |
| author_facet | Javad Sabzi Elyas Asadi Shamsabadi Mansour Ghalehnovi S. Ali Hadigheh Ali Khodabakhshian Jorge de Brito |
| author_sort | Javad Sabzi |
| collection | DOAJ |
| description | This research studies the properties of mortars incorporating waste materials including red mud (RM), ground granulated blast furnace slag (GGBFS), and electric arc furnace dust (EAFD). Ordinary Portland cement (OPC) was partially replaced with equal contents of RM, GGBFS, and EAFD at different ratios by weight (0, 5, 10, 15, 20, 30, 40, and 50%). Slump, compressive strength, splitting tensile strength, electrical resistivity, water absorption, resistance to freeze–thaw cycles, and durability under sodium sulphate and sulphuric acid attacks were investigated. Moreover, the microstructure of mortars cured in tap water and exposed to sulphuric acid was examined using scanning electron microscopy (SEM) and energy dispersive X-ray spectrometer (EDX). Cement replacement up to 20% led to a slight increase in compressive strength at 7, 28, and 120 days, while the results of durability tests showed that only up to 10% cement substitution could improve the durability of the mortar. A microstructural analysis showed that small waste grain portions in the matrix improved the whole mix density and the interfacial transition zone (ITZ) between aggregates and paste. The results of this study showed that there is an optimum replacement ratio of about 10%, beyond which the incorporation of these waste powders can cause degradation of concrete properties. |
| first_indexed | 2024-03-10T11:47:55Z |
| format | Article |
| id | doaj.art-236957654ba24154888fb7850f047160 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T11:47:55Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-236957654ba24154888fb7850f0471602023-11-21T17:55:44ZengMDPI AGApplied Sciences2076-34172021-04-01119411010.3390/app11094110Mechanical and Durability Properties of Mortars Incorporating Red Mud, Ground Granulated Blast Furnace Slag, and Electric Arc Furnace DustJavad Sabzi0Elyas Asadi Shamsabadi1Mansour Ghalehnovi2S. Ali Hadigheh3Ali Khodabakhshian4Jorge de Brito5Department of Civil Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad 91779-48974, IranSchool of Civil Engineering, The University of Sydney, Sydney 2006, AustraliaDepartment of Civil Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad 91779-48974, IranSchool of Civil Engineering, The University of Sydney, Sydney 2006, AustraliaDepartment of Civil Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad 91779-48974, IranDepartment of Civil Engineering, Architecture and Georresources, Instituto Superior Técnico, Universidade de Lisboa, 1649-004 Lisbon, PortugalThis research studies the properties of mortars incorporating waste materials including red mud (RM), ground granulated blast furnace slag (GGBFS), and electric arc furnace dust (EAFD). Ordinary Portland cement (OPC) was partially replaced with equal contents of RM, GGBFS, and EAFD at different ratios by weight (0, 5, 10, 15, 20, 30, 40, and 50%). Slump, compressive strength, splitting tensile strength, electrical resistivity, water absorption, resistance to freeze–thaw cycles, and durability under sodium sulphate and sulphuric acid attacks were investigated. Moreover, the microstructure of mortars cured in tap water and exposed to sulphuric acid was examined using scanning electron microscopy (SEM) and energy dispersive X-ray spectrometer (EDX). Cement replacement up to 20% led to a slight increase in compressive strength at 7, 28, and 120 days, while the results of durability tests showed that only up to 10% cement substitution could improve the durability of the mortar. A microstructural analysis showed that small waste grain portions in the matrix improved the whole mix density and the interfacial transition zone (ITZ) between aggregates and paste. The results of this study showed that there is an optimum replacement ratio of about 10%, beyond which the incorporation of these waste powders can cause degradation of concrete properties.https://www.mdpi.com/2076-3417/11/9/4110mortarred mudelectric arc furnace dustground granulated blast furnace slagmechanical propertiesdurability |
| spellingShingle | Javad Sabzi Elyas Asadi Shamsabadi Mansour Ghalehnovi S. Ali Hadigheh Ali Khodabakhshian Jorge de Brito Mechanical and Durability Properties of Mortars Incorporating Red Mud, Ground Granulated Blast Furnace Slag, and Electric Arc Furnace Dust Applied Sciences mortar red mud electric arc furnace dust ground granulated blast furnace slag mechanical properties durability |
| title | Mechanical and Durability Properties of Mortars Incorporating Red Mud, Ground Granulated Blast Furnace Slag, and Electric Arc Furnace Dust |
| title_full | Mechanical and Durability Properties of Mortars Incorporating Red Mud, Ground Granulated Blast Furnace Slag, and Electric Arc Furnace Dust |
| title_fullStr | Mechanical and Durability Properties of Mortars Incorporating Red Mud, Ground Granulated Blast Furnace Slag, and Electric Arc Furnace Dust |
| title_full_unstemmed | Mechanical and Durability Properties of Mortars Incorporating Red Mud, Ground Granulated Blast Furnace Slag, and Electric Arc Furnace Dust |
| title_short | Mechanical and Durability Properties of Mortars Incorporating Red Mud, Ground Granulated Blast Furnace Slag, and Electric Arc Furnace Dust |
| title_sort | mechanical and durability properties of mortars incorporating red mud ground granulated blast furnace slag and electric arc furnace dust |
| topic | mortar red mud electric arc furnace dust ground granulated blast furnace slag mechanical properties durability |
| url | https://www.mdpi.com/2076-3417/11/9/4110 |
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