New PDF release: Alkali Activated Cenents & Concrete

By Caijun Shi, Della Roy, Pavel Krivenko

ISBN-10: 0203390679

ISBN-13: 9780203390672

ISBN-10: 0415700043

ISBN-13: 9780415700047

The 1st English-language publication which studies and summarizes world wide learn advances in alkali-activated cements and urban. crucial themes comprise: uncooked fabrics and their homes for the construction of the 2 new kinds of binder the hydration and microstructure improvement of alkali-activated slag cements the mechanical houses and sturdiness of alkali-activated slag cement and urban different a variety of cementing platforms and their purposes similar criteria and requirements. This revered workforce of authors has produced an enormous piece of study that may be of significant curiosity to pros and lecturers alike, permitting the construction of tougher and environmentally delicate fabrics.

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Extra resources for Alkali Activated Cenents & Concrete

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The role of MgO in blast furnace slags is dependent upon the CaO and Al2 O3 content (Coale et al. 1973, Cheron and Landinois 1968, Taylor 1964). 35 (Satarin 1976). However, Yuan et al. (1987) felt that the optimum ratio was not a fixed value, but varied with the nature of the slag. 2) Mi where xo = valence of oxygen atoms; xm = valence of network modifiers; Mi = mass percentage of oxide i; and n = number of oxides Experimental results indicated that the higher the is, the higher the hydraulic reactivity of the slag (Yuan et al.

1973, Cheron and Landinois 1968, Taylor 1964). 35 (Satarin 1976). However, Yuan et al. (1987) felt that the optimum ratio was not a fixed value, but varied with the nature of the slag. 2) Mi where xo = valence of oxygen atoms; xm = valence of network modifiers; Mi = mass percentage of oxide i; and n = number of oxides Experimental results indicated that the higher the is, the higher the hydraulic reactivity of the slag (Yuan et al. 1987). Although there are some controversies about the effect of the glass structure on the hydraulic reactivity of slag, it is generally accepted that the more disordered the slag is, the more reactive is the slag.

The bond energies between the network modifiers and oxygen atoms are usually less than 210 KJ/mol. Na, K and Ca are typical network modifiers in vitreous blast furnace slag. Intermediates can act as both the network formers and modifiers. The amphoteric metals Al and Mg are typical intermediates in vitreous blast furnace slag. Their coordination number is 4 when they act as network formers, and 6 as network modifiers. Their bond energies with oxygen atoms range from 210 to 335 KJ/mol. From the bond energies of network formers and network modifiers, it can be anticipated that the more the network formers are, the less reactive is the glass.

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Alkali Activated Cenents & Concrete by Caijun Shi, Della Roy, Pavel Krivenko


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