The Effect of Basalt Fiber on Mechanical, Microstructural, and High-Temperature Properties of Fly Ash-Based and Basalt Powder Waste-Filled Sustainable Geopolymer Mortar

Mahmoud Ziada,Roberto Alonso González Lezcano,Yosra Tammam,Serenay Kara,Savaş Erdem

doi:10.3390/su132212610

Mahmoud Ziada, Roberto Alonso González Lezcano + Show 3 more

Open Access

https://doi.org/10.3390/su132212610

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Abstract

As the human population grows and technology advances, the demand for concrete and cement grows. However, it is critical to propose alternative ecologically suitable options to cement, the primary binder in concrete. Numerous researchers have recently concentrated their efforts on geopolymer mortars to accomplish this objective. The effects of basalt fiber (BF) on a geopolymer based on fly ash (FA) and basalt powder waste (BP) filled were studied in this research. The compressive and flexural strength, Charpy impact, and capillary water absorption tests were performed on produced samples after 28 days. Then, produced samples were exposed to the high-temperature test. Weight change, flexural strength, compressive strength, UPV, and microstructural tests of the specimens were performed after and before the effect of the high temperature. In addition, the results tests conducted on the specimens were compared after and before the high-temperature test. The findings indicated that BF had beneficial benefits, mainly when 1.2 percent BF was used. When the findings of samples containing 1.2 percent BF exposed to various temperatures were analyzed, it was revealed that it could increase compressive strength by up to 18 percent and flexural strength by up to 44 percent. In this study, the addition of BF to fly ash-based geopolymer samples improved the high-temperature resistance and mechanical properties.

Highlights

In terms of environmental protection, it is critical to creating a sustainable product.The geopolymer mortars were used to reduce OrdinaryPortland cement (OPC) use to as an alternative to OrdinaryPortland cement (OPC)
Compressive strength, flexural strength, Ultrasonic Pulse Velocity (UPV), and Charpy impact tests were performed on geopolymer mortar samples after 28 days
These tests were conducted to study the effect of basalt fiber (BF) and determine the mechanical properties of the fly ash-based geopolymer mortars filled with basalt powder waste (BP)

Summary

Introduction

In terms of environmental protection, it is critical to creating a sustainable product.The geopolymer mortars were used to reduce OPC use to as an alternative to OrdinaryPortland cement (OPC). In terms of environmental protection, it is critical to creating a sustainable product. The geopolymer mortars were used to reduce OPC use to as an alternative to Ordinary. Cement manufacture accounts for 5–7 percent of global CO2 emissions [1]. Industrial waste materials (slag, red mud, fly ash) were significant replacements. Alkaline activators were used to activate these waste materials in the geopolymer manufacture process. The carbon dioxide emissions are decreased due to recycling waste materials and using less OPC [2]

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