Formation of Calcium Hydroxide from Aqueous Suspensions of Tricalcium Silicate

Abstract

not possess the capability of generating extremely short load durations. Instead, these durations are considerably longer, and the analogy between SWILT and dynamic fatigue breaks down. As the load durations are increased, SWILT approaches a static fatigue test. Thus, the relationship between SWILT and static fatigue becomes more complicated than the statiddynamic fatigue relationship developed by Gulati. l2 VI. ConclusionsComputations using linear elastic fracture mechanics have indicated that the step size used in an incremental loading test on glass Specimens can produce a small, but observable, effect on the average strength value to be expected from the test. Crack growth during loads prior to that at which failure occurs can affect the time-to-failure during the breaking interval or produce a cumulative weakening which results in breakage at a lower stress than would be the case without such growth.Calculation of simulated test results for a typical test situation yielded a curve showing the amount of predicted weakening as a function of increment size; these results compare favorably with existing data of Mould and Southwick3 and provide a basis for taking account of this effect in designing or evaluating incremental tests on glass specimens or articles.

Scientific Aspects of Kaolinite Based Coal Mining Wastes in Pozzolan/Ca(OH)2 System

“…26,27 The presence of monocarboaluminate traces can be due to the reaction between C 4 AH 13 and calcite as was reported in reference. The appearance of C 4 AH 13 is attributed to supersaturation of the aqueous phase with respect to calcium hydroxide, high concentration of Ca 2+ and OH À in the solution, created by Ca(OH) 2 dissolution, maintains a composition, which enables C 4 AH 13 to precipitate.…”

Studies on early stage hydration of tricalcium silicate incorporating silica nanoparticles: Part I

“…C-S-H or (CH) [13,14]. According to nucleation theory of CH, the nucleation of CH is rate determining parameter and induction period occurs because CH is not precipitated, even after the saturation of the solution due to the poisoning of the nuclei by silicate ions.…”

The Influence of Activated Coal Mining Wastes on the Mineralogy of Blended Cement Pastes

“…High concentrations of Ca 2+ and OH − in the solution, created by the Ca(OH) 2 dissolution, maintain a composition that enables precipitation of C 4 AH 13 . The biggest calcite concentration in the 20% of ACM enables C 4 AH 13 formation as the second hydration product between 28 and 90 d …”