Granularity and Surface Structure of Ground Granulated Blast‐Furnace Slags

Abstract

Ground granulated blast-furnace slags (GGBS) show improved hydration reactivity when granularity fineness increases, but the reason for the improvement in reactivity is still unknown. GGBS specimens with Blaine surface areas of 4680, 6470, and 8050 are analyzed, but the conventional reactivity criteria, such as degree of vitrification, basicity, and mineralogical composition, of the GGBS show no significant differences. X-ray photoelectron spectroscopic analysis, however, successfully distinguishes and identifies SiO 2 gels as well as glassy phases of CaO-SiO 2 and Al 2 O 3 -SiO 2 in the slag surfaces, where, with an increase in the Blaine surface area of the slag, CaO-SiO 2 -type glass becomes dominant and contributes to the evolution of hydration, determined in terms of silicate anion morphology by the trimethylsilylation (TMS) method.

Designing Precursors for Geopolymer Cements

“…While there are many types of slag that may be activated by alkaline solutions, 8,9 this article focuses on ground granulated blast furnace slag (GGBFS), a by‐product of iron manufacture, as it is the most common and widely known to the cement and concrete industry. As slag is generated in the blast furnace and subsequently quenched, its composition is essentially that of an over‐charge‐balanced calcium aluminosilicate framework (i.e., there is more than sufficient calcium available to charge‐balance aluminum, with the remainder contributing to depolymerizing the glass network) 10 . In geopolymers, the key network forming cations are Al 3+ and Si 4+ .…”

Possible production of ceramic tiles from marine dredging spoils alone and mixed with other waste materials

“…A number of researchers have demonstrated reduced leaching from sintered products compared to the original waste [16,17,[19][20][21][26][27][28][29][30][31][32][33]. The use of waste incinerator BA to produce ceramics has been already reported [26][27][28]; SS [17,[21][22][23][24] and MSS [16,17] can be processed just like BA, whereas the studies on the ceramurgic processing of DS or their mixtures with other waste materials are not so common. Few studies demonstrated that vitrification of DS is a suitable process for their reuse [29,30].…”

“…It is known that the production of 1 ton of steel implies the production of 100 kg of slag. Most utilizations of SS are involved in the production of cement, manufacture of different building materials and few others [21][22][23][24]. One of the main disadvantages of SS slag is the presence of a large amount of lime which causes a high softening temperature and a high sintering temperature for materials prepared using these powders without any other additive.…”

Processing of unglazed ceramic tiles from blast furnace slag

“…Other use of BFS is in the manufacture of different building materials like floor tiles, outside and inside facing of walls, providing roof covering or making separating walls [2,3,6,7]. Potential uses also include providing abrasion resistant lining in mineral dressing plants, in pipes including sewer pipes, channels, wear plates [4,5,8,9], counter tops for kitchens and chemical laboratory and as high temperature insulators [3].…”