A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Swelling Characteristics of Fly Ash Based Geopolymer Expansive Clay Blends
Chemical amelioration of expansive clays using cement and lime was quite successful, to improve swelling and shrinkage behaviour. However, these traditional additives were energy-intensive and can produce a large amount CO2 in their production process. This paper discusses the effect of fly ash-based geopolymer on the swelling behaviour of a remoulded expansive clay. One-dimensional swell-consolidation tests were performed on fly ash-based geopolymer expansive clay blends by varying different percentages of fly ash as 5%, 10%, 15%, 20% and 25% by dry weight of soil. Rate and amount of heave, swell potential (S%) and swelling pressure (ps) were studied by varying fly ash content. Test results showed that the amount of heave and swell potential and swelling pressure of blends decreased with increasing fly ash content. The paper also explores the micro-structural behaviour of the fly ash-based geopolymer clay blends using scanning electron microscopy (SEM). The SEM results revealed that the formation of Si–O–Si bonds and flocculation of particles.
Swelling Characteristics of Fly Ash Based Geopolymer Expansive Clay Blends
Chemical amelioration of expansive clays using cement and lime was quite successful, to improve swelling and shrinkage behaviour. However, these traditional additives were energy-intensive and can produce a large amount CO2 in their production process. This paper discusses the effect of fly ash-based geopolymer on the swelling behaviour of a remoulded expansive clay. One-dimensional swell-consolidation tests were performed on fly ash-based geopolymer expansive clay blends by varying different percentages of fly ash as 5%, 10%, 15%, 20% and 25% by dry weight of soil. Rate and amount of heave, swell potential (S%) and swelling pressure (ps) were studied by varying fly ash content. Test results showed that the amount of heave and swell potential and swelling pressure of blends decreased with increasing fly ash content. The paper also explores the micro-structural behaviour of the fly ash-based geopolymer clay blends using scanning electron microscopy (SEM). The SEM results revealed that the formation of Si–O–Si bonds and flocculation of particles.
Swelling Characteristics of Fly Ash Based Geopolymer Expansive Clay Blends
Lecture Notes in Civil Engineering
Satyanarayana Reddy, C. N. V. (editor) / Saride, Sireesh (editor) / Krishna, A. Murali (editor) / Nagaraju, T. V. (author) / Mounika, K. N. (author)
2021-07-28
8 pages
Article/Chapter (Book)
Electronic Resource
English
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