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Mix Design and Mechanical Properties of Fly Ash and GGBFS-Synthesized Alkali-Activated Concrete (AAC)

1
Department of Civil Engineering, Vignan’s Foundation for Science Technology & Research, Vadlamudi, Guntur 522213, India
2
Sree Chaitanya College of Engineering, Jawaharlal Nehru Technology University Hyderabad, Timmapur, Karimnagar 505527, India
*
Author to whom correspondence should be addressed.
Infrastructures 2019, 4(2), 20; https://doi.org/10.3390/infrastructures4020020
Received: 2 March 2019 / Revised: 19 April 2019 / Accepted: 29 April 2019 / Published: 2 May 2019
(This article belongs to the Special Issue Durability and Sustainability of Concrete Mixtures)
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Abstract

Cement is one of the construction materials widely used around the world in order to develop infrastructure and it is also one of the factors affecting economies. The production of cement consumes a lot of raw materials like limestone, which releases CO2 into the atmosphere and thus leads to global warming. Many investigations are underway in this area, essentially focusing on the eco-accommodating environment. In the research, an alternative material to cement binder is geopolymer binder, with the same efficiency. This paper presents scanning electron microscope (SEM) and X-ray diffraction (XRD) analysis of factory byproducts (i.e., fly ash and ground granulated blast furnace slag (GGBFS)). The mix design process for the manufacture of alkali-activated geopolymer binders synthesized by fly ash and GGBFS is presented. The mechanical properties (compression, split tensile and flexural strength, bond strength) of geopolymer concrete at different mix proportions and at dissimilar curing conditions were also investigated. Geopolymer concrete synthesized with 30% fly ash and 70% GGBFS has better properties at 14 M of NaOH and cured in an oven for 24 h at 70 °C. View Full-Text
Keywords: SEM; XRD; geopolymer binder; CO2; fly ash; GGBFS; properties SEM; XRD; geopolymer binder; CO2; fly ash; GGBFS; properties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Bellum, R.R.; Nerella, R.; Madduru, S.R.C.; Indukuri, C.S.R. Mix Design and Mechanical Properties of Fly Ash and GGBFS-Synthesized Alkali-Activated Concrete (AAC). Infrastructures 2019, 4, 20.

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