The action of alkalis on blast furnace slag
WebThe use of ground granulated blast furnace slag as a partial replacement for portland cement is a recognized remedial alternative in cases where a potential for AAR exists. … WebDec 20, 2004 · Pastes of blast-furnace slag were cured for up to 90 d using sodium silicate (waterglass), NaOH, and three different mixtures of Na 2 CO 3 –Na 2 SO 4 –Ca(OH) 2 to activate reactions. The highest slag reactivity was observed for NaOH activation and the least for waterglass, although nonevaporable water indicated similar amounts of …
The action of alkalis on blast furnace slag
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WebTo obtain these alkaline silicates, however, an aqueous solution of the proper proportion of carbonate and silica salts must be heated to temperatures of around 1300 C. The present paper explores the feasibility of using urban and industrial glass waste as a potential alkaline activator for blast furnace slag (AAS). WebThe research has shown that in the situation of simultaneous action of chloride ions and freezing ... the application of both blast-furnace slag cement and an air-entraining agent performed ... (due to the highly alkaline pH of concrete, pH ≈ 12.5–13.5) contributes to the formation of a passive layer on the surface of the bars, and ...
WebIn this study, concretes and pastes were produced from a high MgO ground granulated blast furnace slag (MgO content 16.1 wt.%) by alkali activation with various amounts and combinations of sodium carbonate and sodium silicate. Sodium carbonate activators tended to reduce slump compared to
WebMar 27, 2024 · Alkali silicates, Alkalis, BF, BF lining, HM, scaffolding, slag, Top gas, Effect of Alkalis on Ironmaking Process in a Blast Furnace. One of the main objectives during the … WebMar 15, 2024 · This paper studied the influence of the modulus and dosage of sodium silicate on the hydration of alkali-activated copper-nickel slag (CNS) materials. CNS was used as the main raw material, and ground granulated blast furnace slag (GBFS) powder was selected as the mineral additive. The hydration and hardening mechanisms were …
WebLinks 2. O. Purdon. "The action of alkalis on blast-furnace slag". J. Soc. Chem. Ind. Trans. Commun. Vol. 59. 1940. pp. 191-202.
WebHence, the uses of slag are restricted, even before it needs to be activated. In this investigation, a chemical method was used to activate the ordinary Portland cement-slag mortars (OSM). 37 OSM were used, 4 of them as control. All mix designs were made by W/B = 0.33, S/B = 2.25, and with 0%, 30%, 40%, 50%, and 60% levels of slag. b waldhorn in fWebThe action of alkalis on blast-furnace slag. ... blast furnace slag 引用 ... bwa lexoffice erstellenWebFeb 21, 2024 · This paper investigates the hydrated phase assemblage, microstructure, and gel composition of sodium hydroxide (NaOH)-activated fly ash–slag blends with either low-calcium or high-calcium fly ash. The results show that the nature of precipitated calcium–aluminosilicate–hydrate (C-A-S-H) and alkali aluminosilicate-hydrate (N-A-S-H) … bwake secondary schoolWebThe chemical reactions are induced by strong alkalis such as sodium silicate or sodium hydroxide [3–6]. Blast furnace slag (BFS) is a by-product of iron production in a blast … ceylonese curryWebFeb 11, 2024 · criteria the effect of alkaline activator type on the resistance to the action of sulfur dioxide was established. 2. Materials and Methods 2.1. Materials Alkali-activated … ceylonesischWebSlag is a by-product of smelting (pyrometallurgical) ores and used metals. Broadly, it can be classified as ferrous (by-products of processing iron and steel), ferroalloy (by-product of … bwa kevin gates merchandiseWebApr 12, 2024 · Magnesium oxalate cement, a novel alternative to portland cement, can be made at room temperature by reacting dead-burned magnesia and salts of oxalic acid. Since oxalic acid can ceylonese style