Is electrodeless resistivity method suitable for monitoring the early-age reaction of Na2SiO3-activated slag? Mechanism and application

2021 ◽  
Vol 272 ◽  
pp. 121719
Author(s):  
Kunde Zhuang ◽  
Bao Liu ◽  
Yuan Fang ◽  
Ying Guo ◽  
Le Shuai ◽  
...  
Keyword(s):  
Early Age ◽  
Resistivity Method ◽  
Activated Slag

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 Influence of various additives on the early age compressive strength of sodium carbonate activated slag composites: An overview

2020 ◽  
Vol 29 (1) ◽  
pp. 106-113 ◽  
Author(s):  
Adeyemi Adesina
Keyword(s):  
Compressive Strength ◽  
Portland Cement ◽  
Calcium Oxide ◽  
Sodium Carbonate ◽  
Detrimental Effect ◽  
Partial Replacement ◽  
Early Age ◽  
Activated Slag ◽  
User Friendly ◽  
Alkali Activated

AbstractThe use of sodium carbonate as an alkali activator for slag to produce alkali-activated slag is promising due to its sustainable, economic and user-friendly properties. However, the lower early age performance of composites made with such binder has limited its use especially in applications where higher early age is required. Hence, in order to propel the application of this sustainable binder, it is imperative to find ways in which the early age performance can be enhanced without having a detrimental effect on later age performance. One of the effective and sustainable ways to enhance the early age strength of sodium carbonate activated slag is by incorporation of various additives as partial replacement of sodium carbonate on/and slag. In order to propel more application of sodium carbonate slag for various applications, this current study was undertaken. In this paper, an overview of the types of various additives that can be used to enhance the early age compressive strength of sodium carbonate activated slag composites was discussed. The mechanism and dosage of each of the additives were briefly discussed alongside the limitation and advantages of the additives. Findings from this overview showed that the early age compressive strength of sodium carbonate activated slag can be enhanced with the use of additives such as calcium oxide, calcium hydroxide, Portland cement, sodium hydroxide and sodium silicate.

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
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