Book ChapterDOI
Mix Design of Fly Ash Based Geopolymer Concrete
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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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Book ChapterDOI
Studies on Geopolymer-Based Earthen Compacts
TL;DR: In this article, the use of geopolymer as a binder in the manufacturing of stabilised earth and clay compacts was investigated and the results showed that compacts using natural soil and pure clays result in lower compressive strength.
Journal ArticleDOI
Issues and challenges for development of geopolymer concrete
TL;DR: In this paper , the authors provided a detailed comparative assessment of the past studies to understand the effect of different variables on the properties of geopolymer concrete and concluded that no single parameter is dominant in influencing the strength of concrete.
Journal ArticleDOI
Study on Strength Parameters of In-Situ Fly Ash Based GEO Polymer Concrete with Nitobond PVA
TL;DR: In this article, the authors proposed an alternative solution for 100% cement replaced, in-situ geo-polymer concrete by adding the Nitobond PVA solution in addition to sodium silicate and sodium hydroxide solution to increase the strength of concrete.
Proceedings ArticleDOI
Comparison of mechanical properties of flyash-GGBS based GPC and flyash-alccofine based GPC with different concentrations of alkaline activators
Vemundla Ramesh,Srikanth Koniki +1 more
TL;DR: In this paper, the compressive strength and workability of geopolymer concrete are compared with conventional concrete with different proportion of various source materials and concludes that if economy is the criteria alccofine is not preferable as it is costlier than that of GGBS.
Dissertation
Characterization and properties of bamboo ash replacement in fly ash based geopolymer concrete
TL;DR: In this paper, the use of bamboo ash as a binder in the production of fly ash geopolymer concrete has been investigated and it has been shown that the presence of calcium and potassium content in bamboo ash could remedy this problem.
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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