Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Microstructure and Mechanical Properties of Fly Ash and GGBS-Based Alkali-Activated Concrete
https://orcid.org/http://orcid.org/0000-0002-1446-8056
https://orcid.org/http://orcid.org/0000-0003-1005-6684
Concrete is versatile in nature and a highly consuming material in the world. Due to its high demand, cement production rates are increasing which consumes a large quantity of energy and emits a high amount of carbon dioxide. To reduce these emissions, the alternative binder to OPC is a Geopolymer material that reduces the environmental impact of the construction industry and improves the mechanical strength of the concrete. This study presents the microstructure and mechanical properties of geopolymer concrete made of class F fly ash and GGBS as a binder by completely substituting the cement each with 50% and alkaline activators of sodium hydroxide (NaOH, 12 M) and sodium silicate (Na2SiO3). The ratio of alkaline solution, i.e., sodium silicate to sodium hydroxide (Na2SiO3/NaOH) is considered as 2. The cube, cylinders, and prisms are cast to determine the mechanical properties of GPC. To determine the bond behavior, the cylinders with varying embedded lengths of steel (150 mm, 200 mm, and 250 mm) for M40 grades of concrete are cast and cured under ambient temperature for 28 days. The study investigated the mechanical properties of GPC such as compressive strength, split tensile, Young’s modulus, and flexural strength by conducting various tests on the specimens under UTM. The bond strength of GPC is obtained by conducting a pull-out test. The microstructural analysis is carried out by using SEM and XRD. The results revealed that the mechanical properties of GPC are superior to OPC and bond strength increases with an increase in embedded length by a percentage of 45.85% and 67.75% for M40-grade concrete. The scanning electron microscopy has shown that GPC concrete matrix is more densified with the addition of fly ash and GGBS.
Microstructure and Mechanical Properties of Fly Ash and GGBS-Based Alkali-Activated Concrete
https://orcid.org/http://orcid.org/0000-0002-1446-8056
https://orcid.org/http://orcid.org/0000-0003-1005-6684
Concrete is versatile in nature and a highly consuming material in the world. Due to its high demand, cement production rates are increasing which consumes a large quantity of energy and emits a high amount of carbon dioxide. To reduce these emissions, the alternative binder to OPC is a Geopolymer material that reduces the environmental impact of the construction industry and improves the mechanical strength of the concrete. This study presents the microstructure and mechanical properties of geopolymer concrete made of class F fly ash and GGBS as a binder by completely substituting the cement each with 50% and alkaline activators of sodium hydroxide (NaOH, 12 M) and sodium silicate (Na2SiO3). The ratio of alkaline solution, i.e., sodium silicate to sodium hydroxide (Na2SiO3/NaOH) is considered as 2. The cube, cylinders, and prisms are cast to determine the mechanical properties of GPC. To determine the bond behavior, the cylinders with varying embedded lengths of steel (150 mm, 200 mm, and 250 mm) for M40 grades of concrete are cast and cured under ambient temperature for 28 days. The study investigated the mechanical properties of GPC such as compressive strength, split tensile, Young’s modulus, and flexural strength by conducting various tests on the specimens under UTM. The bond strength of GPC is obtained by conducting a pull-out test. The microstructural analysis is carried out by using SEM and XRD. The results revealed that the mechanical properties of GPC are superior to OPC and bond strength increases with an increase in embedded length by a percentage of 45.85% and 67.75% for M40-grade concrete. The scanning electron microscopy has shown that GPC concrete matrix is more densified with the addition of fly ash and GGBS.
Microstructure and Mechanical Properties of Fly Ash and GGBS-Based Alkali-Activated Concrete
https://orcid.org/http://orcid.org/0000-0002-1446-8056
https://orcid.org/http://orcid.org/0000-0003-1005-6684
Concrete is versatile in nature and a highly consuming material in the world. Due to its high demand, cement production rates are increasing which consumes a large quantity of energy and emits a high amount of carbon dioxide. To reduce these emissions, the alternative binder to OPC is a Geopolymer material that reduces the environmental impact of the construction industry and improves the mechanical strength of the concrete. This study presents the microstructure and mechanical properties of geopolymer concrete made of class F fly ash and GGBS as a binder by completely substituting the cement each with 50% and alkaline activators of sodium hydroxide (NaOH, 12 M) and sodium silicate (Na2SiO3). The ratio of alkaline solution, i.e., sodium silicate to sodium hydroxide (Na2SiO3/NaOH) is considered as 2. The cube, cylinders, and prisms are cast to determine the mechanical properties of GPC. To determine the bond behavior, the cylinders with varying embedded lengths of steel (150 mm, 200 mm, and 250 mm) for M40 grades of concrete are cast and cured under ambient temperature for 28 days. The study investigated the mechanical properties of GPC such as compressive strength, split tensile, Young’s modulus, and flexural strength by conducting various tests on the specimens under UTM. The bond strength of GPC is obtained by conducting a pull-out test. The microstructural analysis is carried out by using SEM and XRD. The results revealed that the mechanical properties of GPC are superior to OPC and bond strength increases with an increase in embedded length by a percentage of 45.85% and 67.75% for M40-grade concrete. The scanning electron microscopy has shown that GPC concrete matrix is more densified with the addition of fly ash and GGBS.
Microstructure and Mechanical Properties of Fly Ash and GGBS-Based Alkali-Activated Concrete
Lecture Notes in Civil Engineering
Pancharathi, Rathish Kumar (Herausgeber:in) / K. Y. Leung, Christopher (Herausgeber:in) / Chandra Kishen, J. M. (Herausgeber:in) / Manasa, Koppoju (Autor:in) / Mudimby, Andal (Autor:in)
International Conference on Cement and Building Koncrete for a Sustainable and Resilient Infrastructure ; 2023 ; Telangana, India
Low Carbon Materials and Technologies for a Sustainable and Resilient Infrastructure ; Kapitel: 4 ; 37-47
23.01.2024
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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