This study was undertaken to provide additional information about the effects of varying water-binder ratio (0.30-0.55) and electric arc furnace dust (EAFD) content (up to 20%) on setting times of blended cements. A study about the influence of total alkali content on setting time of blended cement was also conducted as an attempt to identify an efficient pre-treatment system to solve the retardation influence of such dust on setting time. Results indicate that the use of low w/b ratio is effective in shortening the setting time of blended cements, limiting the setting time below 24 h in most of the analysed mixtures. Increasing the alkali content was also effective on shortening the setting time of blended pastes. Final setting time of pastes with 10% and 20% EAFD was less than 6 hours, and when the EAFD content was 5%, setting times was almost the same of the cement paste. © 2019 International Committee of the SCMT conferences. All rights reserved.
Effect of water and alkali content on setting time of cement pastes with electric arc furnace dust (EAFD)
Faleschini F.;Pellegrino C.;Brunelli K.
2019
Abstract
This study was undertaken to provide additional information about the effects of varying water-binder ratio (0.30-0.55) and electric arc furnace dust (EAFD) content (up to 20%) on setting times of blended cements. A study about the influence of total alkali content on setting time of blended cement was also conducted as an attempt to identify an efficient pre-treatment system to solve the retardation influence of such dust on setting time. Results indicate that the use of low w/b ratio is effective in shortening the setting time of blended cements, limiting the setting time below 24 h in most of the analysed mixtures. Increasing the alkali content was also effective on shortening the setting time of blended pastes. Final setting time of pastes with 10% and 20% EAFD was less than 6 hours, and when the EAFD content was 5%, setting times was almost the same of the cement paste. © 2019 International Committee of the SCMT conferences. All rights reserved.Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.