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Development of metakaolin based high strength recycled aggregate geopolymer concrete
Highlights The effects of the RA content and the AAC/B ratio on the performance of the HSRAGPC were investigated. The combination of geopolymer binder and RA has shown excellent microstructure and durability characteristics. Effects of binder content and AAC/B ratio on the HSRAGPC performance were evaluated. The effect of recycled aggregates on the Mechanical and durability properties of HSRAGPC.
Abstract In order to address the environmental impact of the construction industry, it is necessary to adopt sustainable and eco-friendly practices. One such solution is the development of geopolymer binder with recycled aggregate concrete, which can reduce the consumption of ordinary Portland cement and natural aggregates. This study aimed to improve the quality of high-strength recycled aggregates geopolymer concretes by incorporating metakaolin in varying percentages and adhering to DIN specifications for maximum particle packing. Six different mixes were developed, including three separate alkaline activate content/binder’s ratio and metakaolin at 10% and 15% replacement levels. The study investigated the impact of these green mixtures on fresh and hardened properties such as compressive strength, split tensile and elastic modulus, as well as durability factors such as sorptivity and water permeability, which were supported by microstructural study (SEM and XRD). The results showed that these green mixtures exhibited excellent mechanical and durability performance, making them suitable for various construction projects.
Development of metakaolin based high strength recycled aggregate geopolymer concrete
Highlights The effects of the RA content and the AAC/B ratio on the performance of the HSRAGPC were investigated. The combination of geopolymer binder and RA has shown excellent microstructure and durability characteristics. Effects of binder content and AAC/B ratio on the HSRAGPC performance were evaluated. The effect of recycled aggregates on the Mechanical and durability properties of HSRAGPC.
Abstract In order to address the environmental impact of the construction industry, it is necessary to adopt sustainable and eco-friendly practices. One such solution is the development of geopolymer binder with recycled aggregate concrete, which can reduce the consumption of ordinary Portland cement and natural aggregates. This study aimed to improve the quality of high-strength recycled aggregates geopolymer concretes by incorporating metakaolin in varying percentages and adhering to DIN specifications for maximum particle packing. Six different mixes were developed, including three separate alkaline activate content/binder’s ratio and metakaolin at 10% and 15% replacement levels. The study investigated the impact of these green mixtures on fresh and hardened properties such as compressive strength, split tensile and elastic modulus, as well as durability factors such as sorptivity and water permeability, which were supported by microstructural study (SEM and XRD). The results showed that these green mixtures exhibited excellent mechanical and durability performance, making them suitable for various construction projects.
Development of metakaolin based high strength recycled aggregate geopolymer concrete
Gopalakrishna, Banoth (author) / Pasla, Dinakar (author)
2023-05-13
Article (Journal)
Electronic Resource
English
Sorptivity , Water permeability , Compressive strength , Metakaolin, High strength recycled aggregate geopolymer concrete , FA , Fly ash , GGBS , Ground granulated blast furnace slag , MK , Metakaolin , RA , Recycled aggregate , OPC , Ordinary Portland cement , NA , Natural aggregate , C&D , Construction and demolish , HSRAGPC , High strength recycled aggregate geopolymer concrete , B , Binder , CS , ST , Split tensile , EM , Elastic modulus , RAC , Recycled aggregate concrete , CRA , Coarse recycled aggregate , GPC , Geopolymer concrete , GP , Geopolymer , NaOH , Sodium hydroxide , Na<inf>2</inf>SiO<inf>3</inf> , Sodium silicate , AAC , Alkaline activated content , CASH , Calcium aluminosilicate gel , NASH , Sodium aluminosilicate gel , CSH , Calcium silicate gel , Ca , Calcium , Al , Aluminium , SEM , Scanning Electron Microscope , EDS , energy dispersive spectroscopy , XRD , X-ray fluorescence
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