Investigation on strength development in geopolymer made of power plant fly ash suspension

Author(s): Szymon Dawczyński, Anita Kajzer, Marcin Górski
Paper category: Proceedings
Book title: SynerCrete’18: Interdisciplinary Approaches for Cement-based Materials and Structural Concrete: Synergizing Expertise and Bridging Scales of Space and Time Vol. 1 & 2
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 467-472
Total Pages: 6
Language : English

Abstract: In general, the geopolymers have potential to compete with cement-based materials because of their good mechanical parameters as well as because they are considered as environmentally friendly materials. It is not only because of the reduction of carbon dioxide during the production process (which reduces greenhouse effect) but also because of a large amount of industrial wastes (like fly ashes, mine tailings or metallurgical slags) which are consumed. Paper presents laboratory investigation on geopolymeric binder made of fly ash suspension, metakaolin, and recycled ground glass. The geopolimerisation reaction was activated with the use of a 10M solution of sodium hydroxide mixed with sodium silicate. The researches were focused on strength development in the first two weeks just after the day when samples were prepared. The curing time in the climatic chamber was 24 hours in a temperature of 60°C and humidity 40%. The prism samples 40x40x160 mm were used for flexural strength tests and halves of broken prisms were used for compression strength tests. These tests were performed after 1, 3, 7 and 14 days after samples preparation. In both cases, it was noted that the strength was increased with the increasing of curing time (in case of flexural strength from 1.29 to 2.58 MPa, and in case of compressive strength from 19.05 to 21.99 MPa).

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00