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Influence of geopolymer aggregates on micro-structural and durability characteristics of OPC concrete

Influence of geopolymer aggregates on micro-structural and durability characteristics of OPC... This paper explores the physical, mechanical and durability characteristics of Fly ash—ground granulated blast furnace slag (GGBS) based Geopolymer aggregates include Specific gravity, impact value, crushing value, loss angles abrasion value, attrition value and water absorption respectively. Besides, scanning electron microscopy (SEM) was done to diagnose the microstructure of geopolymer aggregates. In addition to this mechanical, durability and microstructural behavior of the ordinary portland cement concrete made with the geopolymer aggregate includes compressive strength, split tensile strength, open porosity, water absorption, sorpitivity, Rapid Chloride Penetration Test (RCPT) and SEM with EDS were investigated. With help of SEM interfacial transition zone (ITZ) was examined. In this paper, three types of geopolymer aggregates are prepared by replacing 0, 10, and 20% of fly ash with GGBS cured under oven (at 60° for 12 h) and ambient conditions. The study considers the two grades of concrete M20 and M40 as per IS 456-2000. However, concrete prepared geopolymer Aggregates (80% fly ash and 20% GGBS) Showed higher resistance among all the tests and giving similar results at ambient and oven curing. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Building Pathology and Rehabilitation Springer Journals

Influence of geopolymer aggregates on micro-structural and durability characteristics of OPC concrete

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References (71)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2021
ISSN
2365-3159
eISSN
2365-3167
DOI
10.1007/s41024-021-00153-y
Publisher site
See Article on Publisher Site

Abstract

This paper explores the physical, mechanical and durability characteristics of Fly ash—ground granulated blast furnace slag (GGBS) based Geopolymer aggregates include Specific gravity, impact value, crushing value, loss angles abrasion value, attrition value and water absorption respectively. Besides, scanning electron microscopy (SEM) was done to diagnose the microstructure of geopolymer aggregates. In addition to this mechanical, durability and microstructural behavior of the ordinary portland cement concrete made with the geopolymer aggregate includes compressive strength, split tensile strength, open porosity, water absorption, sorpitivity, Rapid Chloride Penetration Test (RCPT) and SEM with EDS were investigated. With help of SEM interfacial transition zone (ITZ) was examined. In this paper, three types of geopolymer aggregates are prepared by replacing 0, 10, and 20% of fly ash with GGBS cured under oven (at 60° for 12 h) and ambient conditions. The study considers the two grades of concrete M20 and M40 as per IS 456-2000. However, concrete prepared geopolymer Aggregates (80% fly ash and 20% GGBS) Showed higher resistance among all the tests and giving similar results at ambient and oven curing.

Journal

Journal of Building Pathology and RehabilitationSpringer Journals

Published: Dec 1, 2022

Keywords: Fly ash; GGBS; Geopolymer aggregates; Mechanical properties; Durability; Microstructure

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