Modification of mechanical and thermal properties of fly ash-based geopolymer by the incorporation of steel slag
Source abstract
Abstract
Geopolymeric binders (GB) were produced using fly ash (FA) and electric arc furnace slag (EAFS). The slag has been added in the range of 0–40%. The effects of slag content on the strength, microstructure and thermal resistance were evaluated. It was found that the amount of EAFS up to 30% positively affects the strength evolution of GB. The main reaction product of FA/EAFS blends was amorphous N–(C)–A–S–H gel along with geopolymer-type gel (N–A–S–H). Thermal resistance of GB was considered from the standpoint of their mechanical and dimensional stability after heating in the temperature interval of 600–800 °C. The changes in mechanical and thermal properties of GB after heating are attributed to the changes in their structure. The results have shown that EAFS negatively affects the thermal resistance of GB above 600 °C due to the phase transition and morphological transformation of the amorphous gel phase.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Concrete and Cement Materials Research · Recycling and utilization of industrial and municipal waste in materials production · Magnesium Oxide Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
Show source-provided references
1. Composition and microstructure of alkali activated fly ash binder: Effect of the activator10.1016/j.cemconres.2005.03.003 ↗
2. Improved compressive strength of alkali activated slag upon heating10.1016/j.matlet.2014.07.021 ↗
3. Influence of granulated blast furnace slag on the reaction, structure and properties of fly ash based geopolymer10.1007/s10853-009-3934-5 ↗
4. Reactivity and reaction products of alkali-activated, fly ash/slag paste10.1016/j.conbuildmat.2015.02.022 ↗
5. Physical-mechanical and microstructural properties of alkali-activated fly ash–blast furnace slag blends10.1016/j.ceramint.2014.09.075 ↗
6. Reaction progress of alkaline-activated metakaolin-ground granulated blast furnace slag blends10.1007/s10853-009-3790-3 ↗
7. Influence of iron making slags on strength and microstructure of fly ash geopolymer10.1016/j.conbuildmat.2012.09.070 ↗
8. Effect of calcium silicate sources on geopolymerisation10.1016/j.cemconres.2007.11.001 ↗
9. Role of slag in microstructural development and hardening of fly ash-slag geopolymer10.1016/j.cemconres.2012.10.004 ↗
10. Influence of calcium compounds on the mechanical properties of fly ash geopolymer pastes10.1016/j.jhazmat.2008.12.121 ↗
11. The influence of calcium content on the structure and thermal performance of fly ash based geopolymers10.1007/s10853-006-0532-7 ↗
12. Modification of phase evolution in alkali-activated blast furnace slag by the incorporation of fly ash10.1016/j.cemconcomp.2013.09.006 ↗
13. Thermal character of geopolymers synthesized from class F Fly ash containing high concentrations of iron and a-Quartz10.1111/j.1744-7402.2008.02328.x ↗
14. Effects of elevated temperatures on the thermal behavior and mechanical performance of fly ash geopolymer paste, mortar and lightweight concrete10.1016/j.conbuildmat.2013.09.047 ↗
15. The hydration of slag, part 1: reaction models for alkali-activated slag10.1007/s10853-006-0873-2 ↗
16. In-situ carbonation of alkali activated fly ash geopolymer10.1016/j.conbuildmat.2014.06.012 ↗
17. Gel nanostructure in alkali-activated binders based on slag and fly ash, and effects of accelerated carbonation10.1016/j.cemconres.2013.06.007 ↗
18. Synthesis and characteristics of fly ash and bottom ash based geopolymers-A comparative study10.1016/j.ceramint.2013.10.012 ↗
19. Thermally induced microstructural changes in fly ash geopolymers: Experimental results and proposed model10.1111/jace.13370 ↗
20. Thermal analysis of geopolymer pastes synthesised from five fly ashes of variable composition10.1016/j.jnoncrysol.2012.05.032 ↗
21. New cementitious materials based on alkali-activated fly ash : performance at high temperatures10.1111/j.1551-2916.2008.02625.x ↗
22. Assessing the suitability of three Australian fly ashes as an aluminosilicate source for geopolymers in high temperature applications10.1016/j.msea.2011.01.005 ↗