The Influence of Slag on the Properties of Fly Ash-based Geopolymer Composites

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    Ramamohana Reddy Bellum

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    1. Associate Professor,Aditya Engineering College,Andhra Pradesh,India

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    Abstract

    nInorganic molecules undergo a chemical reaction that results in the production of a brand-new building material known as geopolymer concrete. Otherwise known as an inorganic aluminohydroxide polymer, geopolymer is made mostly from by-products like fly ash and geologically derived silicon (Si) and aluminium (Al). It is a superior building material for the future because of its great mechanical qualities, significant chemical resistance (attack by magnesium or sulphate), low shrinkage and creep, and environmentally benign nature. It has been proven that geopolymer concrete (GC) is suitable for use in construction projects, including the building of walkways, prefabricated elements, and pavements. The current study intends to construct a road network using GC while sustainably utilizing industrial by-products. GC is a creative and environmentally sustainable alternative to conventional Portland cement (OPC) concrete. In this study, the GC was
    produced using binders such as fly ash, ground granulated blast furnace slag, and cement. Two distinct types of solutions were required in order to activate these binders (an alkaline solution which was prepared in the laboratory and activator solution purchased commercially). The surface of the GC got denser, which decreased the permeability of chloride ions, water absorption, open porosity, and sorptivity values. The microstructural examination revealed distinct quartz, calcite, and C-A-S-H formations. The 0.45 S/B ratio mixes also showed greater Si/Al ratios and higher quartz and calcite percentages.

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    Keywords: Geopolymer composites, mechanical properties, microstructural properties, denser structure and durability

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    Full Text

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    References

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    1. American Coal Ash Association. Fly Ash Facts for Highway Engineers. Washington, DC: United States Federal Highway Administration. Office of Technology Applications; 2003 June 13.
    2. Ahmari S, Ren X, Toufigh V, Zhang L. Production of geopolymeric binder from blended waste concrete powder and fly ash. Construct Building Mater. 2012; 35: 718–729.
    3. Kurtoglu AE, Alzeebaree R, Aljumaili O, Nis A, Gulsan ME, Humur G, Cevik A. Mechanical and durability properties of fly ash and slag based geopolymer concrete. Adv Concrete Construct. 2018; 6 (4): 345. doi: 10.12989/acc.2018.6.4.345.
    4. Bouaissi A, Li LY, Abdullah MM, Bui QB. Mechanical properties and microstructure analysis of FA-GGBS-HMNS based geopolymer concrete. Construct Building Mater. 2019; 210: 198-209.
    5. Marceau ML, Gajda J, VanGeem MG. Use of fly ash in concrete: normal and high volume ranges. PCA R&D Serial No. 2604. Skokie, IL: Portland Cement Association; 2002.
    6. Rahmadina A, Ekaputri JJ. Mechanical properties of geopolymer concrete exposed to combustion. InMATEC Web of Conferences 2017; 138: 01022.
    7. Monkman S, Kenward PA, Dipple G, MacDonald M, Raudsepp M. Activation of cement hydration with carbon dioxide. J Sustain Cement-Based Mater. 2018; 7 (3): 160–181.
    8. ASTM C 618-19, Standard Specification for Coal FA and Raw or Calcined Natural Pozzolan for Use in Concrete. West Conshohocken, PA: ASTM International; 2019.
    9. ASTM C1202-12, Standard Test Method for Electrical Indication of Concrete’s Ability to Resist Chloride Ion Penetration. West Conshohocken, PA: ASTM International; 2012.
    10. ASTM C143/C143M-20, Standard Test Method for Slump of Hydraulic-Cement Concrete. West Conshohocken, PA: ASTM International; 2020.
    11. ASTM C1585-20, Standard Test Method for Measurement of Rate of Absorption of Water by Hydraulic-Cement Concretes. West Conshohocken, PA: ASTM International; 2020..
    12. ASTM C267-20, Standard Test Methods for Chemical Resistance of Mortars, Grouts, and Monolithic Surfacing and Polymer Concretes. West Conshohocken, PA: ASTM International; 2020.

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    Conference Open Access Original Research

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    Journal of Polymer and Composites

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    [if 344 not_equal=””]ISSN: 2321–2810[/if 344]

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    Volume 11
    Issue 01
    Received December 21, 2022
    Accepted March 19, 2023
    Published June 23, 2023

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    Editor

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    Reviewer

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