Download PDF by Tenney L. Davis: The Chemistry of Powder and Explosives

By Tenney L. Davis

The current quantity comprises in a single binding the entire contents of quantity I, first released in could, 1941, and the total contents of quantity II which used to be released in March, 1943. The ebook used to be basically for chemists. The writing of it used to be began so that a textbook may be to be had for using scholars within the direction in powder and explosives which the writer gave for approximately 20 years (nearly each year because the first international conflict) to fourth-year and graduate scholars of chemistry and of chemical engineering on the Massachusetts Institute of Technology.... the purpose of the booklet has been too defined as truly and curiously as attainable and as absolutely as appeared ecocnomic the modes of habit, either actual and chemical, of explosive elements, even if those modes locate useful software or now not. ancient fabric has been incorporated the place it was once notion that it contributed to this finish, and has now not been incorporated in other places or for the other cause. it's a incontrovertible fact that a data of the heritage of rules, of people, or of items produces anything of an analogous sympathetic realizing of them that dwelling with them and dealing with them does. --- excerpts from book's Preface

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5–1 mm dark rings appeared around lighter-coloured and thinner slag rings. EDX microanalysis confirmed that regardless of the type of activator, the majority product was always a C‑S‑H gel with a low Ca/Si ratio containing small amounts of Na, Mg, Al and S. When NaOH was the activator, a semi-crystalline C‑S‑H gel (I) was visible in the early stages of the reaction, while with waterglass, crystallinity remained very low even after a full year of hydration. Fernández-Jiménez et al. (2003) also used different microscopic techniques to study these materials.

2 Reaction mechanisms The alkaline activation of silica- and alumina-rich materials is less thoroughly understood than slag activation because it is a relatively recent line of research. Glukhovsky (1994) proposed a general mechanism for the activation reactions in these materials, consisting of three stages: (a) destruction-coagulation; (b) coagulationcondensation; and (c) condensation-crystallisation. In the first (see Eq. 2), the reaction begins when the OH- ions in the alkaline activator break the Si‑O‑Si bonds.

Phases of this type have also been found in cement + slag blends. • C4AH13-type phases have been detected in slag activated with NaOH. , 1995). , 1992) have observed carbonated phases such as C4AcH11 and C8Ac2H24 in slag pastes activated with NaOH and Ca(OH)2. 4 Micro- and nanostructure of the gel formed: C‑A‑S‑H-type gels The alkaline activation of blast furnace slag may vary slightly with the chemical and mineralogical composition of the slag, as well as with activator type and composition. Sodium hydroxide and waterglass are the two activators most commonly used.

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The Chemistry of Powder and Explosives by Tenney L. Davis


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