Results 181 to 190 of about 23,149 (209)
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Alkali activation of Australian slag cements
Cement and Concrete Research, 1999Abstract Investigation of alkali activation of Australian slag (AAS) was carried out using sodium silicate, sodium hydroxide, sodium carbonate, sodium phosphate, and combinations of these activators. Compressive strengths in the range from 20 to 40 MPa were achieved for the pastes. The most effective activator was liquid sodium silicate.
Tatiana Bakharev +2 more
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Sulfate Resistance of Alkali Activated Cements
Materials Science Forum, 2016One of the most important questions of concrete durability is increasing of corrosion resistance of cement stone and materials on his basis. Perspective way of solving such problems is using of alkali activated binders.Two cement systems were investigated to obtain different materials for different application - geocement system for repair materials ...
Pavlo Kryvenko +3 more
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Alkali-Activated Slag--Fly Ash Cements
"SP-114: Fly Ash, Silica Fume, Slag, and Natural Pozzolans in Concrete: Proceedings of the Third International Conference", 1989This paper investigated cements consisting of 60 percent ground granulated blast furnace slag and 40 percent fly ash activated by 7 percent sodium hydroxide. Various slags were used, including some laboratory-made synthetic slags. The influence of additives like superplasticizers and defoaming agents has been examined.
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Hydration products of alkali activated slag cement
Cement and Concrete Research, 1995This paper presents some recent research on the microstructural development during alkaline activation of slag pastes. Pastes of different slags activated with a range of activators have been prepared and some preliminary results from the study of the pastes activated with sodium hydroxide and waterglass solutions are presented. X-ray diffraction (XRD),
Shao-Dong Wang, Karen L. Scrivener
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High‐Temperature Resistance in Alkali‐Activated Cement
Journal of the American Ceramic Society, 2010This paper discusses the results of tests conducted to ascertain at high temperatures the mechanical behavior of cements whose most prominent characteristic is the absence or near absence of Portland cement in their composition. More specifically, it reports on the study of three binders: (a) Portland cement (
Ana Fernández‐Jiménez +3 more
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Fiber Reinforced Alkali Activated Blended Cement Materials
MRS Proceedings, 1990AbstractRecently there has been renewed interest in the use of alkali activation to increase the rate of strength development in blended cements. The objective of this study was to examine the advantages-disadvantages of using alkali activated blended cement materials with fiber reinforcing.
M. R. Silsbee +2 more
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Clay reactivity: Production of alkali activated cements
Applied Clay Science, 2013Abstract This study has assessed the suitability of dehydroxylated (5 h at 750 °C) red, white and ball clays for the use as prime materials in the production of alkaline cements. The analytical methodology applied to quantify their potentially reactive phases included selective chemical attack, which was also used in conjunction with subsequent ICP ...
Gomez, Cristina Ruiz Santa Quiteria +3 more
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Alkali-activated cements Opportunities and challenges
Cement and Concrete Research, 1999Abstract Alkali-activated cements as discussed here are those with compositions falling in the Me2O-MeO-Me2O3-SiO2-H2O system. This paper reviews their history of development and discusses their present status. Currently, there are major opportunities for such cements based upon (a) substantial knowledge of properties and mechanisms; (b) good track ...
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New Rapid Setting Alkali Activated Cement Compositions
MRS Proceedings, 1989AbstractThe advantage of utilizing blended cements for many applications has been well documented. However, the use of these materials has been limited by the longer setting times associated with the use of these materials. This report discusses the development of formulations employing alkali activation to shorten the setting times.
D. M. Roy +2 more
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Shrinkage Characteristics of Alkali-Activated Slag Cements
Journal of Materials in Civil Engineering, 2015AbstractRecent interest in creating green construction materials has sparked the development of portland cement–free binders. Alkali-activated slag (AAS) concrete has a low embodied energy and comparable or superior strengths to ordinary portland cement (OPC) concrete.
Christopher Cartwright +2 more
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