scholarly journals Temperature and activator effect on early-age reaction kinetics of alkali-activated slag binders

2016 ◽  
Vol 113 ◽  
pp. 783-793 ◽  
Author(s):  
Berhan Seium Gebregziabiher ◽  
Robert J. Thomas ◽  
Sulapha Peethamparan
Keyword(s):  
Reaction Kinetics ◽  
Early Age ◽  
Alkali Activated Slag ◽  
Activated Slag ◽  
Kinetics Of ◽  
Alkali Activated

Effect of Fly Ash, MgO and Curing Solution on the Chemical Shrinkage of Alkali-Activated Slag Cement

2010 ◽  
Vol 168-170 ◽  
pp. 2008-2012 ◽  
Author(s):  
Yong Hao Fang ◽  
Ya Min Gu ◽  
Qiu Boa Kang
Keyword(s):  
Fly Ash ◽  
Ordinary Portland Cement ◽  
Alkali Concentration ◽  
Early Age ◽  
Chemical Shrinkage ◽  
Slag Cement ◽  
Alkali Activated Slag ◽  
Reduction Effect ◽  
Activated Slag ◽  
Alkali Activated

The chemical shrinkages of alkali-activated slag cement (AASC), and the effect of fly ash, MgO burnt at 900°C and the curing solutions were studied. The shrinkages were compared with that of ordinary portland cement (OPC). The results show that the chemical shrinkage of AASC is lower than that of OPC. Adding fly ash and light-burnt MgO reduced the early age chemical shrinkage, while the shrinkage-reduction effect decreased with the age. The alkality of the curing solution has significant effect on the hydration and shrinkage of AASC. The chemical shrinkage of AASC increased with the alkali concentration of the curing solution. The mechanisms of fly ash, MgO and curing solution on the shrinkage were discussed.

scholarly journals Study of Shrinkage Restraint Effects at Early-Age in Alkali-Activated Slag Mortars

2016 ◽  
Author(s):  
Farah Rifai ◽  
Aveline Darquennes ◽  
Farid Benboudjema ◽  
Bensoit Muzeau ◽  
Lavinia Stefan
Keyword(s):  
Early Age ◽  
Alkali Activated Slag ◽  
Activated Slag ◽  
Alkali Activated

scholarly journals Early-age properties of alkali-activated slag and glass wool paste

2021 ◽  
Vol 291 ◽  
pp. 123326
Author(s):  
Zhenming Li ◽  
Irving Alfredo Flores Beltran ◽  
Yun Chen ◽  
Branko Šavija ◽  
Guang Ye
Keyword(s):  
Glass Wool ◽  
Early Age ◽  
Alkali Activated Slag ◽  
Activated Slag ◽  
Alkali Activated

scholarly journals Preliminary Interpretation of the Induction Period in Hydration of Sodium Hydroxide/Silicate Activated Slag

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4796
Author(s):  
Yibing Zuo ◽  
Guang Ye
Keyword(s):  
Induction Period ◽  
Isothermal Calorimetry ◽  
Action Mechanism ◽  
Alkali Activated Slag ◽  
Alkaline Activator ◽  
Activated Slag ◽  
Calorimetric Studies ◽  
Kinetics Of ◽  
Alkali Activated ◽  
Good Interpretation

Many calorimetric studies have been carried out to investigate the reaction process of alkali-activated slag paste. However, the origin of the induction period and action mechanism of soluble Si in the dissolution of slag are still not clear. Moreover, the mechanisms behind different reaction periods are not well described. In this study, the reaction kinetics of alkali-activated slag paste was monitored by isothermal calorimetry and the effect of soluble Si was investigated through a dissolution test. The results showed that occurrence of the induction period in hydration of alkali-activated slag paste depended on the presence of soluble Si in alkaline activator and the soluble Si slowed down the dissolution of slag. A dissolution theory-based mechanism was introduced and applied to the dissolution of slag, showing good interpretation of the action mechanism of soluble Si. With this dissolution theory-based mechanism, origin of the induction period in hydration of alkali-activated slag was explicitly interpreted.

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