A Study on Durability and Microstructural Analysis for Macro Synthetic Fiber Reinforced Concrete with Supplementary Cementitious Materials

M Venkata Maheswara Reddy; S Krishnaiah

doi:10.17485/IJST/v17i16.701

Article

A Study on Durability and Microstructural Analysis for Macro Synthetic Fiber Reinforced Concrete with Supplementary Cementitious Materials

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Indian Journal of Science and Technology

DOI: 10.17485/IJST/v17i16.701

Year: 2024, Volume: 17, Issue: 16, Pages: 1663-1671

Original Article

A Study on Durability and Microstructural Analysis for Macro Synthetic Fiber Reinforced Concrete with Supplementary Cementitious Materials

M Venkata Maheswara Reddy^1*, S Krishnaiah²

¹Research Scholar, Department of Civil Engineering, Jawaharlal Nehru Technological University, Anantapur (JNTUA), Ananthapuramu, 515002, Andhra Pradesh, India
²Professor, Department of Civil Engineering, Jawaharlal Nehru Technological University, Anantapur (JNTUA), Ananthapuramu, 515002, Andhra Pradesh, India

*Corresponding Author
Email: [email protected]

Received Date:10 March 2024, Accepted Date:26 March 2024, Published Date:16 April 2024

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

Background: Thermal cracking, delayed ettringite production and low tensile strength are three significant problems for high-strength concrete. Objectives: The current experimental study aims to determine the durability characteristics of concrete for application in pavements. To test how well the M40 grade of concrete absorbed chloride and water, the amounts of Supplementary Cementitious Materials (SCM) like Granulated Blast-Furnace Slag (GBFS) and fixed amounts of Fly Ash (FA) and Macro Synthetic Fiber (MSF) were optimized. Methods: One sample (S1) was made entirely of Ordinary Portland Cement (OPC) and five samples (S2, S3, S4, S5, and S6) made simply of SCMs, in which OPC was substituted with 20% FA+20% GBFS+1.5% MSF, 20% FA+25% GBFS+1.5% MSF, 20% FA+30% GBFS+1.5% MSF, 20% FA+35% GBFS+1.5% MSF, and 20% FA+40% GBFS+1.5% MSF, respectively, were cast in standard blocks with a volume of one cubic meter for this purpose. Field Emission Scanning Electron Microscopy (FESEM), Fourier-Transform Infrared Spectroscopy (FTIR), and X-ray Diffraction (XRD) investigations are used to examine the number of hydration products created at 28 days, which differ for different percentages of SCMs. Findings: Furthermore, 501, 520, 535, 565, and 590 coulombs are the measured Rapid Chloride Permeability Test (RCPT) values for the S2 to S6 samples. Similarly, the S1 sample is projected to have more than 2600 coulombs, showing a better endurance of samples based on SCMs. The microstructural characterization findings (i.e., XRD, FTIR and FESEM) suggested that GBFS and FA are promising SCMs for enhancing the strength and durability properties of the mix. Novelty and applications: This study validates the viability of using GBFS, FA, and MSF in pavement applications, yielding noteworthy environmental advantages and lowering dependency on OPC.

Keywords: Durability, Microstructural investigation, Macro synthetic fiber, Fly ash, Granulated blast furnace slag, Pavements

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Copyright

© 2024 Reddy & Krishnaiah. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Published By Indian Society for Education and Environment (iSee)