Mineralogical Aspects of Durable Geocement Matrix Formation - Role of Alkali

Abstract:

Less than half a century ago just an idea of presence of free alkalis in a ceramic matrix was considered by ordinary Portland cement people as an absurd one and this was a basic postulate accepted in chemistry of cements. In 1957 a scientist from Ukraine (USSR) Viktor Glukhovsky put forward an assumption which was taken as a base for development and bringing into practice of construction a principally new class of cementitious materials which first appeared in the field under a name of alkaline (now also known under a general name of alkali-activated) cementitious materials. A validity of these ideas was confirmed by more than 50 years of evolutional development and vast experience collected on practical use of new materials in different applications. The paper covers theoretical views on role played by alkali in the formation of an alkali-activated cement matrix with high durability. Examples of compositional build-up of the alkali-activated cementitious materials vs. quantity of added alkali and type of aluminosilicate component are reported together with results of 50-year experience obtained from observation of concrete structures made from these cements.

• Periodical: Advanced Materials Research (Volumes 1004-1005)
• Pages: 1523-1530
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1004-1005.1523
• Online since: August 2014
• Authors: Pavlo V. Kryvenko, Hai Lin Cao, Lu Qian Weng, Еlena Kаvalerova
• Keywords: Alkaline Activator, Blast-Furnace Slag, Durability, Geocement

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DOI: 10.4324/9780203390672