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Evaluation of slag characteristics on the reaction kinetics and mechanical properties of Na2CO3 activated slag
HighlightsSlag characteristics on Na2CO3 activated slag are explored.Na2CO3 activation is considerably accelerated by controlling slag characteristics.Increasing the slag fineness enhances only the early age strength.Na2CO3 dosage (3–5wt.%) on strength and reaction kinetics is not prominent.
AbstractThis paper evaluates the slag characteristics on the reaction kinetics, reaction products and mechanical properties of sodium carbonate activated slag (SCAS). The results show that, by reducing the slag particle size, the precipitation of strength-giving phase of SCAS can be dramatically accelerated, and the time to reach the reaction peak (TRRP) can be accelerated from 86h to 23h and a 3d-compressive strength of about 34MPa is achieved. The fresh behaviour of pastes is affected by the initial precipitation of calcium carbonate and the formation of gaylussite is also accelerated when reducing the particle sizes of slags. It is observed that the early strength development of samples is largely controlled by the fineness of slag particles, while the later strength firstly increases with the reduction of slag particles until reaching a turning point and then decreases. Furthermore, the influential factors including the alkali activator dosage and slag characteristics on the reaction kinetics of Na2CO3 activated slag are discussed.
Evaluation of slag characteristics on the reaction kinetics and mechanical properties of Na2CO3 activated slag
HighlightsSlag characteristics on Na2CO3 activated slag are explored.Na2CO3 activation is considerably accelerated by controlling slag characteristics.Increasing the slag fineness enhances only the early age strength.Na2CO3 dosage (3–5wt.%) on strength and reaction kinetics is not prominent.
AbstractThis paper evaluates the slag characteristics on the reaction kinetics, reaction products and mechanical properties of sodium carbonate activated slag (SCAS). The results show that, by reducing the slag particle size, the precipitation of strength-giving phase of SCAS can be dramatically accelerated, and the time to reach the reaction peak (TRRP) can be accelerated from 86h to 23h and a 3d-compressive strength of about 34MPa is achieved. The fresh behaviour of pastes is affected by the initial precipitation of calcium carbonate and the formation of gaylussite is also accelerated when reducing the particle sizes of slags. It is observed that the early strength development of samples is largely controlled by the fineness of slag particles, while the later strength firstly increases with the reduction of slag particles until reaching a turning point and then decreases. Furthermore, the influential factors including the alkali activator dosage and slag characteristics on the reaction kinetics of Na2CO3 activated slag are discussed.
Evaluation of slag characteristics on the reaction kinetics and mechanical properties of Na2CO3 activated slag
Yuan, B. (author) / Yu, Q.L. (author) / Brouwers, H.J.H. (author)
Construction and Building Materials ; 131 ; 334-346
2016-11-14
13 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2017
| DOAJ | 2018