The Influence of Composition and Recipe Dosage on the Strength Characteristics of New Geopolymer Concrete with the Use of Stone Flour

Evgenii M Shcherban’,Levon R Mailyan,Sergey A Stel’Makh,Diana El’Shaeva,Besarion Meskhi,Alexey N Beskopylny

doi:10.3390/app12020613

Evgenii M Shcherban’, Levon R Mailyan + Show 4 more

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https://doi.org/10.3390/app12020613

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Abstract

Currently, considering global trends and challenges, as well as the UN sustainable development goals and the ESG plan, the development of geopolymer binders for the production of geopolymer concrete has become an urgent area of construction science. This study aimed to reveal the influence of the component composition and recipe dosage on the characteristics of fine-grained geopolymer concrete with the use of stone flour. Eleven compositions of geopolymer fine-grained concrete were made from which samples of the mixture were obtained for testing at the beginning and end of setting and models in the form of beams and cubes for testing the compressive strength tensile strength in bending. It was found that the considered types of stone flour can be successfully used as an additive in the manufacture of geopolymer concrete. An analysis of the setting time measurements showed that stone flour could accelerate the hardening of the geopolymer composite. It was found that the addition of stone waste significantly improves the compressive strength of geopolymers in comparison with a geopolymer composite containing only quartz sand. The maximum compressive strength of 52.2 MPa and the tensile strength in bending of 6.7 MPa provide the introduction of potassium feldspar in an amount of 15% of the binder mass. Microstructural analysis of the geopolymer composite was carried out, confirming the effectiveness of the recipe techniques implemented in this study.

Highlights

The structure formation concept of geopolymer materials was proposed in 1979 by the French researcher Davidovits [1,2,3] and actively developed in recent years.The interest of scientists and engineers in geopolymers is explained by these materials’technological and operational characteristics
As for the composition of type C, the amorphous component was present in a smaller difficult to compare results due to a large number of developments of completely different amount, compared with the composition of type 8B; it contained separate flocculent compositions based on entirely different initial components that have a different nature of structure formation and formation of properties
The types of stone flour considered in this work can be successfully used as an additive in the manufacture of geopolymer concrete

Summary

Introduction

The structure formation concept of geopolymer materials was proposed in 1979 by the French researcher Davidovits [1,2,3] and actively developed in recent years.The interest of scientists and engineers in geopolymers is explained by these materials’technological and operational characteristics. The structure formation concept of geopolymer materials was proposed in 1979 by the French researcher Davidovits [1,2,3] and actively developed in recent years. In the early stages of the development of geopolymers, they were used to create expensive materials with high performance for aviation, automotive, and other industries. Geopolymers are most actively studied in countries with a high level of scientific and technological development and significant volumes of mineral waste generated in various industries. These countries include France, the USA, Australia, Germany, the Czech

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