Book ChapterDOI
Mix Design of Fly Ash Based Geopolymer Concrete
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TLDR
In this paper, an experimental investigation has been carried out for the gradation of geopolymer concrete and a mix design procedure is proposed on the basis of quantity and fineness of fly ash, quantity of water, grading of fine aggregate, fine to total aggregate ratio.Abstract:
Geopolymer is a new development in the world of concrete in which cement is totally replaced by pozzolanic materials like fly ash and activated by highly alkaline solutions to act as a binder in the concrete mix. For the selection of suitable ingredients of geopolymer concrete to achieve desire strength at required workability, an experimental investigation has been carried out for the gradation of geopolymer concrete and a mix design procedure is proposed on the basis of quantity and fineness of fly ash, quantity of water, grading of fine aggregate, fine to total aggregate ratio. Sodium silicate solution with Na2O = 16.37 %, SiO2 = 34.35 % and H2O = 49.28 % and sodium hydroxide solution having 13 M concentration were maintained constant throughout the experiment. Water-to-geopolymer binder ratio of 0.35, alkaline solution-to-fly ash ratio of 0.35 and sodium silicate-to-sodium hydroxide ratio of 1.0 by mass were fixed on the basis of workability and cube compressive strength. Workability of geopolymer concrete was measured by flow table apparatus and cubes of 150 mm side were cast and tested for compressive strength after specified period of oven heating. The temperature of oven heating was maintained at 60 °C for 24 h duration and tested 7 days after heating. It is observed that the results of workability and compressive strength are well match with the required degree of workability and compressive strength. So, proposed method is used to design normal and standard geopolymer concrete.read more
Citations
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Properties of fly ash based geo-polymer concrete
TL;DR: In this paper, the fly ash content per cubic meter of concrete used in this study are 395 kg, 410 kg and 425 kg Two fine aggregates are used, namely river sand and quarry sand.
Journal ArticleDOI
Compressive Strength Analysis of Fly Ash-Based Geopolymer Concrete Using Machine Learning Approaches
Journal ArticleDOI
The Binder Index – A Parameter That Influences the Strength of Geopolymer Concrete
TL;DR: In this article, an experimental investigation concerning the strength of the GPC and its relation to a new parameter called the Binder Index (BI) was presented. And the results indicated that a nonlinear relation exists between the binder index and the compressive strength of GPC.
Journal ArticleDOI
Effect of alkali activator dosage on compressive and tensile strength of ground granulated blast furnace slag based geopolymer concrete
TL;DR: In this paper, the authors focus on the preparation of solely ground granules and propose a method to reduce use of Portland Cement by releasing enormous quantity of CO2 to reduce environmental degradation.
Journal Article
Geopolymer concrete-a best solution to cement concrete in hot climate
TL;DR: In this article, the suitability of geopolymer concrete instead of cement concrete is studded on the basis of mechanical strength for different test period, where concrete cubes of side 150mm were cast at solutions-to-fly ash ratio of 0.40 and all specimens were cured in oven at 400C, 600C in oven while some cubes were placed in natural sunlight in summer season for test period of 3, 7 and 28 days.
References
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Journal ArticleDOI
Geopolymers : inorganic polymeric new materials
TL;DR: In the last few years, technological progress has been made in the development of new materials such as "geopolymers" and new techniques, such as ''sol-gel'' as mentioned in this paper, opening up new applications and procedures and transforming ideas that have been taken for granted in inorganic chemistry.
Journal ArticleDOI
Synthesis and characterisation of materials based on inorganic polymers of alumina and silica: sodium polysialate polymers
TL;DR: In this article, a statistical study of the effect on the polymerization process of the molar ratio of the component oxides and the water content of the mixture showed the latter to be a critical parameter.
Journal ArticleDOI
On the development of fly ash-based geopolymer concrete
TL;DR: In this article, fly ash-based geopolymer concrete was developed to reduce greenhouse gas emissions, and the test results showed the effects of various parameters on the properties of the concrete.
Journal Article
Making concrete greener with flyash
TL;DR: In this article, the authors discuss the increase use of large volumes of fly ash and other supplementary cementing materials in the construction industry and its role in reducing these emissions, since the manufacture of portland cement contributes significantly to carbon dioxide emissions.
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