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Mechanical activation of granulated blast furnace slag and its effect on the properties and structure of portland slag cement
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In this paper, the use of activated granulated blast furnace slag (GBFS) was used in the range of 50-95% to replace clinker in portland slag cement (PSC).Abstract:
Mechanically activated granulated blast furnace slag (GBFS) was used in the range of 50–95% to replace clinker in portland slag cement (PSC). The slag and clinker were activated separately using an attrition mill and mixed to prepare cement formulations. Use of activated slag resulted in a remarkable increase in strength vis-a-vis commercial slag cement. Both 1-day and 28-day strength were found to increase with an increase in slag content up to 70%. The strength of the sample containing 80–85% slag was comparable to the commercial cement used as a reference. It was observed that mechanical activation of slag was more critical from the point of view of strength development. The hydrated cement samples were characterised using powder X-ray diffraction (XRD), scanning electron microscopy with X-ray microanalysis (SEM-EDS) and simultaneous thermogravimetry and differential thermal analysis (TG/DTA). It is established that microstructural changes resulting from enhanced reactivity of slag and densification are related with the improvement in cement strength.read more
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Hallmarks of mechanochemistry: From nanoparticles to technology
Peter Baláž,Marcela Achimovičová,Matej Baláž,P. Billik,P. Billik,Zara Cherkezova-Zheleva,José M. Criado,Francesco Delogu,Erika Dutková,Eric Gaffet,Francisco J. Gotor,Rakesh Kumar,Ivan Mitov,Tadej Rojac,Mamoru Senna,A. N. Streletskii,A. N. Streletskii,Krystyna Wieczorek-Ciurowa +17 more
TL;DR: The aim of this review article is to provide a comprehensive overview of advances achieved in the field of atomistic processes, phase transformations, simple and multicomponent nanosystems and peculiarities of mechanochemistry.
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Emerging energy-efficiency and CO2 emission-reduction technologies for cement and concrete production: A technical review
TL;DR: In this article, the authors compile available information on process description, energy savings, environmental and other benefits, costs, commercialization status, and references for emerging technologies to reduce the cement industry's energy use and CO2 emissions.
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Development of ultra-high performance engineered cementitious composites using polyethylene (PE) fibers
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Journal ArticleDOI
Mechanical activation of fly ash: Effect on reaction, structure and properties of resulting geopolymer
Sanjay Kumar,Rakesh Kumar +1 more
TL;DR: In this article, the authors studied the geopolymerisation of mechanically activated fly ash at ambient (27 degrees C) and elevated (60 degrees C), by isothermal conduction calorimeter.
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Recent advances in the field of cement hydration and microstructure analysis
TL;DR: This paper reviewed experimental and theoretical studies related to cement hydration and microstructure development that have been published within the four years of the interim period between the 12th and 13th International Congress on the Chemistry of Cement.
References
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Book
The chemistry of cement and concrete
TL;DR: The chemistry of cement and concrete as discussed by the authors, The chemistry of concrete and its properties, and the relationship between concrete and cement, is a classic example of such an approach. But it is not suitable for outdoor use.
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Tobermorite/jennite- and tobermorite/calcium hydroxide-based models for the structure of C-S-H: applicability to hardened pastes of tricalcium silicate, β-dicalcium silicate, Portland cement, and blends of Portland cement with blast-furnace slag, metakaolin, or silica fume
TL;DR: In this article, the applicability of the tobermorite-jennite (T/J) and T/CH viewpoints for the nanostructure of C-S-H present in real cement pastes is discussed.
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Solubility and structure of calcium silicate hydrate
TL;DR: In this paper, a family of solubility curves for poorly crystalline calcium silicate hydrate (C-S-H) phases were derived from 29Si magic-angle spinning (MAS) NMR data and by charge balance calculations.
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Pore solution chemistry of alkali-activated ground granulated blast-furnace slag
Sujin Song,Hamlin M. Jennings +1 more
TL;DR: In this article, the chemical composition and pH of pore solution extracted from six different ground granulated blast-furnace slag (GGBFS) pastes were determined, and the main hydration product was identified as C-S-H, and hydrotalcite was observed in the pastes with an aqueous phase of a high pH.
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Breaking characteristics of different materials and their effect on stress intensity and stress number in stirred media mills
Arno Kwade,Joerg Schwedes +1 more
TL;DR: In this paper, the effect of stress intensity, stress number, and specific energy on the product fineness is determined by the breakage characteristic of the material and two main groups can be distinguished: deagglomeration and disintegration and secondly, grinding of crystalline materials.