Alkali Content of Fly Ash – Measuring and Testing Strategies for Compliance, TR-628, 2015

Sodium and potassium are the common alkalis present in fly ash. Excessive amounts of fly ash alkalis can cause efflorescence problems in concrete products and raise concern about the effectiveness of the fly ash to mitigate alkali-silica reaction (ASR). The available alkali test, which is commonly used to measure fly ash alkali, takes approximately 35 days for execution and reporting. Hence, in many instances the fly ash has already been incorporated into concrete before the test results are available. This complicates the job of the fly ash marketing agencies and it leads to disputes with fly ash users who often are concerned with accepting projects that contain materials that fail to meet specification limits. The research project consisted of a lab study and a field study. The lab study focused on the available alkali test and how fly ash alkali content impacts common performance tests (mortar-bar expansion tests). Twenty-one fly ash samples were evaluated during the testing. The field study focused on the inspection and testing of selected, well documented pavement sites that contained moderately reactive fine aggregate and high-alkali fly ash. A total of nine pavement sites were evaluated. Two of the sites were control sites that did not contain fly ash. The results of the lab study indicated that the available alkali test is prone to experimental errors that cause poor agreement between testing labs. A strong (linear) relationship was observed between available alkali content and total alkali content of Class C fly ash. This relationship can be used to provide a quicker, more precise method of estimating the available alkali content. The results of the field study failed to link the use of high-alkali fly ash with the occurrence of ASR in the various concrete sites. Petrographic examination of the pavement cores indicated that Wayland sand is an ASR-sensitive aggregate. This was in good agreement with Iowa DOT field service records. It was recommended that preventative measures should be used when this source of sand is used in concrete mixtures.

Arkistoluettelo 628: Väinö Hannikainen

Luettelo Kansalliskirjastossa olevan Väinö Hannikaisen arkiston sisällöstä

Decreto rectoral No.628 : Créase el programa de pregrado en Finanzas y Comercio Internacional

Promover el desarrollo de nuevos programas docentes a nivel pregrado y postgrado, programa de pregrado en Finanzas y Comercio Internacional.

Resolución 628(XXXI): Admisión de las Islas Turcos y Caicos como miembro asociado de la Comisión Económica para América Latina y el Caribe

Error en símbolo en tapa y contraportada (S/2006/20)

Resolution 628(XXXI): Admission of the Turks and Caicos Islands as an associate member of the Economic Commission for Latin America and the Caribbean

Includes bibliography

Percutaneous mitral valve edge-to-edge repair: in-hospital results and 1-year follow-up of 628 patients of the 2011-2012 Pilot European Sentinel Registry.

BACKGROUND The use of transcatheter mitral valve repair (TMVR) has gained widespread acceptance in Europe, but data on immediate success, safety, and long-term echocardiographic follow-up in real-world patients are still limited. OBJECTIVES The aim of this multinational registry is to present a real-world overview of TMVR use in Europe. METHODS The Transcatheter Valve Treatment Sentinel Pilot Registry is a prospective, independent, consecutive collection of individual patient data. RESULTS A total of 628 patients (mean age 74.2 ± 9.7 years, 63.1% men) underwent TMVR between January 2011 and December 2012 in 25 centers in 8 European countries. The prevalent pathogenesis was functional mitral regurgitation (FMR) (n = 452 [72.0%]). The majority of patients (85.5%) were highly symptomatic (New York Heart Association functional class III or higher), with a high logistic EuroSCORE (European System for Cardiac Operative Risk Evaluation) (20.4 ± 16.7%). Acute procedural success was high (95.4%) and similar in FMR and degenerative mitral regurgitation (p = 0.662). One clip was implanted in 61.4% of patients. In-hospital mortality was low (2.9%), without significant differences between groups. The estimated 1-year mortality was 15.3%, which was similar for FMR and degenerative mitral regurgitation. The estimated 1-year rate of rehospitalization because of heart failure was 22.8%, significantly higher in the FMR group (25.8% vs. 12.0%, p[log-rank] = 0.009). Paired echocardiographic data from the 1-year follow-up, available for 368 consecutive patients in 15 centers, showed a persistent reduction in the degree of mitral regurgitation at 1 year (6.0% of patients with severe mitral regurgitation). CONCLUSIONS This independent, contemporary registry shows that TMVR is associated with high immediate success, low complication rates, and sustained 1-year reduction of the severity of mitral regurgitation and improvement of clinical symptoms.

Na 50 Nachlass Arthur Schopenhauer - 'Schopenhauer-Archiv', 628 - Antwortschreiben an Rudolf Seydel zum Stand der Publikation "Schopenhauers philosophisches System"

1 Seite

Ms.Ff.F.Stoltze 3. 628 - Brief von Marie Stoltze an Lyda Stoltze

Hermann Stoltze, Leopoldine Renwart

Na 1 Nachlass Max Horkheimer, 628 - Vorbereitungsunterlagen zur Vorlesung, Proseminar und Seminar (p. VIII 48.1-5-VIII 50.1-2)

"Randphänomene der Gesellschaft", Seminar Wintersemester 1959/60, Friedrich Pollock: eigenhändige Notizen zum Seminar, 12 Blatt; Max Horkheimer: 1 Briefentwurf und Brief an den Chefarzt des Psychiatrischen Krankenhauses Haina, Frankfurt, 21.12.1959, 2 Blatt; Max Horkheimer: 1 Briefentwurf an Hoff,..., Universitätsklinik Wien, o.O., o.D., 1 Blatt; Referate und Protokolle zum Seminar (Walther, ...; Kuhn, Hans; Rebenau, K.H.v.; Grün, Richard), Typoskripte, 25 Blatt; Zeitungsausschnitte über Kriminalität und Strafvollzug; "Was ist der Mensch?", Proseminar Wintersemester 1960/61, eigenhändige Notizen zum Proseminar, 2 Blatt; Programm und Liste der Referate, 1 Blatt; "Zur Idee der Freiheit", Vorlesung Sommersemester 1961, Max Horkheimer: eigenhändige Notizen, 1 Heft, 16 Blatt, davon 9 leer und 7 zusätzliche Blätter; Hilmar Tillack: Ausgearbeitete Nachschrift der Vorlesung Max Horkheimers, Typoskript, 64 Blatt;

Finocchio, Silvia. La escuela en la historia argentina, Buenos Aires, Edhasa, 2009, 211 páginas, ISBN: 978-987-628-064-8

Fil: Irazábal, María Belén. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

"Una burguesía inadecuada" Reseña de: Horowicz, Alejandro. Las dictaduras Argentinas. Historia de una frustración nacional - 1ª ed. - Buenos Aires, Edhasa, 2012, 384 p. ISBN 978-987-628-153-9

Fil: Zorzoli, María Luciana. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Finocchio, Silvia. La escuela en la historia argentina, Buenos Aires, Edhasa, 2009, 211 páginas, ISBN: 978-987-628-064-8

Fil: Irazábal, María Belén. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.