Geothermal clay-based geopolymer binders: Synthesis and microstructural characterization
Source abstract
Abstract
Abstract Geothermal clay rich in kaolinite was first prepared into geopolymer binders. Preparation conditions of calcination on geothermal clay, Na 2 SiO 3 and NaOH combination in alkaline activator, and water content were studied. Thermal nature of the geothermal clay was characterized by TG-DSC and XRD measurements, which shows characteristics of kaolinite and cristobalite during calcination. Mechanical property, morphology and microstructure of the geothermal clay-based geopolymers were characterized by compressive strength measurements, SEM observation and NMR spectra analysis. With optimal synthesizing parameters, geothermal clay-based geopolymer possessed a compressive strength of 19.5 MPa, as well as a homogeneous geopolymeric gel with high percentages of Q 4 (2Al) and Q 4 (1Al) . As geothermal clay is supposed to be of intermediate dissolution reactivity in geopolymerization, this synthesis might extend the kinds of raw aluminosilicates in geopolymer formation.
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 · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (26)
Show source-provided references
1. Production of geopolymeric binder from blended waste concrete powder and fly ash10.1016/j.conbuildmat.2012.04.044 ↗
2. Technological characterization and industrial application of two Turkish clays for the ceramic industry10.1016/j.clay.2010.08.005 ↗
3. The α–β phase transition in volcanic cristobalite10.1107/S160057671401070X ↗
4. Geopolymers and geopolymeric materials10.1007/BF01904446 ↗
5. 29Si NMR study of structural ordering in aluminosilicate geopolymer gels10.1021/la047336x ↗
6. Geopolymer technology: the current state of the art10.1007/s10853-006-0637-z ↗
7. Engelhardt · 1987
8. Effect of curing temperature on the nonevaporable water in portland cement blended with geothermal silica waste10.1016/j.cemconcomp.2010.07.004 ↗
9. The effect of silica availability on the mechanism of geopolymerisation10.1016/j.cemconres.2011.02.001 ↗
10. Synthesis and characterization of red mud and rice husk ash-based geopolymer composites10.1016/j.cemconcomp.2012.11.010 ↗
11. The effect of composition and temperature on the properties of fly ash-and kaolinite-based geopolymers10.1016/S1385-8947(02)00025-6 ↗
12. Kinetics of the decomposition of freeze-dried aluminum sulfate and ammonium aluminum sulfate10.1111/j.1151-2916.1971.tb12386.x ↗
13. The degree of aluminum avoidance in aluminosilicate glasses10.2138/am-1999-5-630 ↗
14. Characterization of organic surfactant on montmorillonite nanoclay to be used in bitumen10.1061/(ASCE)MT.1943-5533.0000013 ↗
15. The structural groups of alkali silicate glasses determined from 29Si Mas-NMR10.1016/0022-3093(91)90400-Z ↗
16. Clay minerals related to the hydrothermal activity of the Bouillante geothermal field (Guadeloupe)10.1016/j.jvolgeores.2006.07.010 ↗
17. Alkali-activated fly ashes: a cement for the future10.1016/S0008-8846(98)00243-9 ↗
18. Low-temperature synthesized aluminosilicate glasses10.1007/BF00355128 ↗
19. Geopolymerization and its potential application in mine tailings consolidation: a review10.1080/08827508.2015.1055625 ↗
20. Strength development in clay-fly ash geopolymer10.1016/j.conbuildmat.2012.11.015 ↗
21. Effect of mechanical activation of fly ash on the properties of geopolymer cured at ambient temperature10.1016/j.jmatprotec.2009.03.016 ↗
22. Reexamining calcination of kaolinite for the synthesis of metakaolin geopolymers-roles of dehydroxylation and recrystallization10.1016/j.jnoncrysol.2017.01.024 ↗
23. Geopolymerisation of multiple minerals10.1016/S0892-6875(02)00255-8 ↗
24. Effect of elevated temperature on the properties of geopolymer synthesized from calcined ore-dressing tailing of bauxite and ground-granulated blast furnace slag10.1016/j.conbuildmat.2014.07.002 ↗
25. Synthesis and characterization of fly ash modified mine tailings-based geopolymers10.1016/j.conbuildmat.2011.04.005 ↗
26. Role of water in the synthesis of calcined kaolin-based geopolymer10.1016/j.clay.2008.09.003 ↗