Krivenko, P. V.; Roy, D. M.; Shi, Caijun's Alkali-activated cements and concretes PDF

By Krivenko, P. V.; Roy, D. M.; Shi, Caijun

ISBN-10: 0203390679

ISBN-13: 9780203390672

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Extra resources for Alkali-activated cements and concretes

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1995, Geiseler 1996). The Ministry of Transportation of Ontario, Canada, banned the use of steel slag in asphalt concrete on provincial highways in 1993 because of the soundness problem. 5 Cementing properties of steel slag The presence of C3 S, C2 S, C4 AF and C2 F contributes to the cementitious property of steel furnace slag. 8 summarizes the relationship between basicity, main mineral phase and hydraulic reactivity of steel slag. It can be seen that the reactivity of steel slag increases with its basicity.

10 Maximum concentration of SiO2 solutions of various silica modulus with maximum permissible viscosity for their transporting through pipelines at room temperature (based on Vail and Wills 1952). 22 Alkaline activators a given content of alkali Na2 O , an increase in modulus of the system leads to an increase in viscosity. When the modulus of a solution is greater than 4 but lower than 25, it tends to form a gel, which has a very low viscosity. For a given concentration and modulus, the nature of the silicate anions in the solution has a great effect on viscosity of the solution.

8% as the total free lime content increases to 12%. Thus, the volume soundness of steel slag is mainly determined by the content of residual lime (Geiseler 1996). MgO in steel slag comes from dolomite, which is used as a flux, and MgO refractory, which is used as the lining of the steel furnace. A high content of MgO is often detected because refractory material comes into the slag, which also causes soundness problems of steel slag. 7 Relationship between residual lime, precipitated lime and total lime content in steel slag (Wachsmuth et al.

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Alkali-activated cements and concretes by Krivenko, P. V.; Roy, D. M.; Shi, Caijun


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