Retracted: Effect of Reactive Magnesium Oxide on Properties of Alkali-Activated Slag-Cement Pastes

Nowadays, alkali-activated cements (AACs) are the most promising alternatives to ordinary portland cement (OPC). Such cements characterized by better strength and corrosion resistance that determine improved durability of materials based on them. However, the shrinkage of AAC systems is noticeably higher compared with OPC. The purpose of this work was to study the shrinkage behavior of alkali-activated slag cement (AASC) pastes. To improve early age performance of AASCs – OPC and Ca(OH)2, as mineral additives, were added to the designed cement mixtures. The properties, like, flexural and compressive strength of cement mortars, chemical shrinkage, autogenous shrinkage and drying shrinkage of cement pastes were studied. The results showed that the chemical shrinkage, autogenous shrinkage and drying shrinkage at 28 days were between 0.064 – 0.074 ml/g, 4.5 – 7.9 mm/m and 3.3 – 4.9 mm/m, respectively. The relationship between the nature of alkaline components, the type of mineral additives and the shrinkage behavior of cements were discussed.

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Pore solution in alkali-activated slag cement pastes. Relation to the composition and structure of calcium silicate hydrate

Cement and Concrete Research ◽

10.1016/s0008-8846(03)00254-0 ◽

2004 ◽

Vol 34 (1) ◽

pp. 139-148 ◽

Cited By ~ 172

Author(s):

F Puertas ◽

A Fernández-Jiménez ◽

M.T Blanco-Varela

Keyword(s):

Calcium Silicate ◽

Calcium Silicate Hydrate ◽

Pore Solution ◽

Slag Cement ◽

Cement Pastes ◽

Alkali Activated Slag ◽

Composition And Structure ◽

Activated Slag ◽

Alkali Activated

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C-A-S-H gels formed in alkali-activated slag cement pastes. Structure and effect on cement properties and durability

MATEC Web of Conferences ◽

10.1051/matecconf/20141101002 ◽

2014 ◽

Vol 11 ◽

pp. 01002

Author(s):

F. Puertas ◽

M. Palacios ◽

H. Manzano ◽

J.S. Dolado ◽

A. Rico ◽

...

Keyword(s):

Slag Cement ◽

Cement Pastes ◽

Alkali Activated Slag ◽

Activated Slag ◽

Alkali Activated

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Adsorption of Calcium Lignosulphonate Water Reducer on Alkali-Activated Slag Cement Pastes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.681.7 ◽

2013 ◽

Vol 681 ◽

pp. 7-10 ◽

Cited By ~ 2

Author(s):

Chang Hui Yang ◽

Qun Pan ◽

Huan Zhou

Keyword(s):

Zeta Potential ◽

Rheological Properties ◽

Slag Cement ◽

Cement Pastes ◽

Alkali Activated Slag ◽

Absolute Value ◽

Adsorption Of Water ◽

Activated Slag ◽

Alkali Activated ◽

Over Time

This paper shows how calcium lignosulphonate（CSL）water reducer affects the adsorption and rheological properties of alkali-activated slag cement (AASC) pastes activated by NaOH. It was concluded that the adsorption of water reducer on AASC pastes depended directly on the dosage of the water reducer and the retarder. Slag particles grounded with the retarder YP-3 adsorbed one and a half times of water reducer CSL as much as pure slag particles at 1% mass of the slag, and the absolute value increment of the zeta potential of the AASC suspension containing the retarder YP-3 is 14.00mV, compared with 9.25mV in the system without YP-3. Besides, the AASC pastes activated by NaOH containing the retarder YP-3 show better rheological properties and lower fluidity loss over time.

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