Full Text

Turn on search term navigation

© 2023. This work is licensed under https://creativecommons.org/licenses/by/4.0/deed.es (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

This study investigated the fresh, physical, and mechanical properties of self-compacting geopolymer mortars (SCGs) with synthetic wollastonite microfiber (SWM). SCGs were designed with Class F fly ash (FA) as a binder by activating it with Na2SiO3 and NaOH solutions. First, SWM was produced in the laboratory. Alkali ratios were determined as 1.5, 2.0, and 2.5, whereas SWM percentages were utilized as 0%, 4%, 8%, and 12% by weight of the binder. After geopolymer mortars were cured at 80 oC and 100 oC for 24 hours, respectively, they were kept at room temperature until testing age. The compressive strength, flexural strength, ultrasonic pulse velocity, dynamic modulus of elasticity, water sorptivity coefficient values, and physical characteristics of SCGs were tested at the end of the 28th day. The highest compressive strength value was obtained as 28.9 MPa for SCG-1.5-8 cured at 100 oC, while 6.5 MPa was measured as the highest flexural strength for SCG-2-12 cured at 80 oC.

Alternate abstract:

En este estudio se investigaron las propiedades físicas y mecánicas en estado fresco de los morteros de geopolímero autocompactante (SCG) con microfibra de wollastonita sintética (SWM). Los SCG se diseñaron con cenizas volantes (FA) de clase F como aglutinante y se activaron con soluciones de Na2SiO3 y NaOH. En primer lugar, la SWM se produjo en el laboratorio. Las relaciones de álcalis quedaron determinadas como 1.5, 2.0 y 2.5, mientras que los porcentajes de SWM, como 0 %, 4 %, 8 % y 12 % en peso de aglomerante. Los morteros de geopolímeros se curaron a 80 oC y 100 oC durante 24 horas, respectivamente, y posteriormente se mantuvieron a temperatura ambiente hasta la edad de ensayo. Tras observar el diámetro de flujo de asentamiento de los SCG en estado fresco, a los 28 días se determinaron la resistencia a la compresión, la resistencia a la flexión, la velocidad del pulso ultrasónico y los valores del coeficiente de absorción de agua, así como las características físicas de los SCG. El valor de resistencia a la compresión más alto (28.9 MPa ) se obtuvo para SCG-1.5-8 curado a 100 oC, mientras que 6.5 MPa se midió como la resistencia a la flexión más alta para SCG-2-12 curado a 80 oC.

Details

Title
Characteristic properties of fly ash-based self-compacting geopolymer mortars with synthetic wollastonite microfiber produced from silica and calcite
Author
Öz, H Ö  VIAFID ORCID Logo  ; Ünsal, D  VIAFID ORCID Logo 
First page
e307
Section
Research Articles
Publication year
2023
Publication date
2023
Publisher
Consejo Superior de Investigaciones Científicas
ISSN
04652746
e-ISSN
19883226
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2789327081
Copyright
© 2023. This work is licensed under https://creativecommons.org/licenses/by/4.0/deed.es (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.