1,599 research outputs found
The Market Gate of Miletus: damages, material characteristics and the development of a compatible mortar for restoration
No full textThe indoor exhibit of the Market Gate of Miletus is unique for an archaeological monument. The reconstruction of the gate was done in such a way that most marble fragments were removed leaving cored marble columns 3-4 cm in thickness. These cored columns were mounted on a steel construction and filled with different mortars or filled with specially shaped blocks of brick combined with mortar. All the missing marble elements were replaced by copies made of a Portland cement based concrete, which is compositionally similar to the original building materials. During the Second World War the monument was heavily damaged by aerial bombardment. For 2 years the Market Gate of Miletus was exposed to weathering, because a brick wall protecting the gate was also destroyed. The deterioration phenomena observed are microcracks, macroscopic fractures, flaking, sugaring, greying, salt efflorescence, calcitic-sinter layers and iron oxide formation etc. The rapid deterioration seems to be due to indoor atmospheric effects, and also by a combination of incompatible materials (e.g. marble, steel, mortar, concrete, bricks etc.). Compatible building materials like mortars or stone replacing materials have to be developed for the planned restoration. The requirements for restoration mortars are chemical-mineralogical and physical-mechanical compatibilities with the existing building materials. In detail this means that the mortar should ensure good bonding properties, adapted strength development and not stain the marble when in direct contact. The favoured mortar was developed with a hydraulic binder based on iron-free white cement and pozzolana based on activated clay. A special limestone and quartz sand mixture was used as an aggregate. The cement was adjusted using chemical additives. Specially designed tests were applied extensively to prove whether the developed mortar is suitable for the restoration of this precious monument.Deutsche Bundesstiftung Umwel
Bernhard Karlgren Portrait of A Scholar
No full textThe author draws a portrait of his teacher Bernhard Karlgren (1889-1978), whose research in a variety of fields laid the foundations of Modern Sinology. The work deals with Karlgren's childhood, school years, university studies at Uppsala and St. Petersburg, adventurous sojourn in China, studies in Paris, and academic career at Uppsala and Gothenburg University. This book will help the reader gain insight into the man behind the stern scholar.Intro -- Preface -- 1 Childhood and Schooldays in Jönköping, 1889-1907 -- THE HOME AND THE FAMILY -- LARS OF THE MANOR AND HIS TWO SONS -- THE CLERGYMAN'S DAUGHTER ELLA HASSELBERG AND HER FAMILY -- THE GOOD AND FAITHFUL SERVANT -- THE DIFFICULT YEARS -- BERNHARD: POET, TRANSLATOR, AND DRAMATIST -- THE DIALECT INVESTIGATOR -- 2 Liber Studiosus, 1907-1909 -- STUDIES AT UPPSALA UNIVERSITY -- RUSSIAN WINTER -- 3 The Great Adventure, 1910-1911 -- SAILING IN A SHIP CARRYING GUNPOWDER AS CARGO -- TAIYUAN UNIVERSITY -- THE INDUSTRIOUS DIALECTOLOGIST -- WORRIES ABOUT THE FUTURE -- THE TREASURES OF THE STONE FOREST -- THE FOREIGN CORRESPONDENT -- 4 The Irresolute Strategist, 1912-1914 -- THE INTERLUDE IN LONDON -- AT THE FEET OF CHAVANNES IN PARIS -- 5 The Diligent Correspondent -- THE AVID READER -- THE GREAT QUESTIONS -- SELF-SEARCHING -- 6 The Scholarly Breakthrough -- UPPSALA OR PARIS? -- THE PUBLIC DEFENSE OF THE THESIS -- THE YOUNG LECTURER -- THE STRUGGLE TO MAKE A LIVING -- THE FARSIGHTED PLANNER -- 7 The Gothenburg Years, 1918-1939 -- THE FIRST YEARS AT GOTHENBURG UNIVERSITY -- BACK TO THE FAR EAST -- BACK AT THE TEACHER'S DESK -- THE NARROW CONFINES OF THE SOCIETY OF SCHOLARSHIP -- THE CONFERRING OF DOCTORAL DEGREES IN 1931 -- BERNHARD KARLGREN AND SVEN HEDIN 9 -- THE DEFENDER OF HUMAN RIGHTS -- BERNHARD KARLGREN OUTSIDE THE IVORY TOWER -- 8 Proximitatem Linguae Longinquae Manifestam Fecit -- CHINA'S TRADITIONAL PHILOLOGY -- LINGUISTIC ECHO-SOUNDING -- RIMES AND SOUNDING SIGNS IN ANCIENT CHINA -- SIBLINGS IN FAMILIES OF CHINESE WORDS -- THE BOLD PIONEER -- UNFINISHED INCEPTIONS -- ABC TRAVELS EAST -- 9 Stockholm, 1939-1959: The Legendary Master -- THE EAST ASIAN COLLECTION -- THE MORPHOLOGY AND SYNTAX OF BRONZE DÉCOR -- THE PHILOLOGIST IN HIS ELEMENT -- EXCURSIONS IN CHINESE GRAMMAR -- THE STERN CRITIC -- THE EMINENT POPULARIZERSCHOLAR IN THE SERVICE OF SOCIETY -- DR. BACKMAN, DOCENT SPIRA, AND SENIOR MASTER BRUUN -- A REMARKABLE FAMILY OF BROTHERS AND SISTERS -- THE VENERATED MASTER AND HIS DISCIPLES -- 10 Bernhard Karlgren, Professor Emeritus, 1959-1978 -- BERNHARD KARLGREN AND THE BMFEA -- IN THE LEXICOGRAPHER'S STUDY -- CITIZEN IN THE REPUBLIC OF SCHOLARS -- A List of Works by Bernhard Karlgren in Other Languages than Swedish, Together with Translations into Chinese and Japanese, and a List of His Distinctions and Awards -- ABBREVIATIONS -- Notes -- CHAPTER 1. CHILDHOOD -- CHAPTER 2. LIBER STUDIOSUS -- CHAPTER 3. THE GREAT ADVENTURE -- CHAPTER 4. IRRESOLUTE STRATEGIST -- CHAPTER 5. DILIGENT CORRESPONDENT -- CHAPTER 6. SCHOLARLY BREAKTHROUGH -- CHAPTER 7. GOTHENBURG YEARS -- CHAPTER 8. PROXIMITATEM LINGUAE -- CHAPTER 9. STOCKHOLM, 1939-1959 -- CHAPTER 10. PROFESSOR EMERITUS -- BibliographyThe author draws a portrait of his teacher Bernhard Karlgren (1889-1978), whose research in a variety of fields laid the foundations of Modern Sinology. The work deals with Karlgren's childhood, school years, university studies at Uppsala and St. Petersburg, adventurous sojourn in China, studies in Paris, and academic career at Uppsala and Gothenburg University. This book will help the reader gain insight into the man behind the stern scholar.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
Bernhardi Kellii Hypodidascalus : Darin zu sehen Wie die Schulemeister und Eltern ire angehende Kinder ohn viel schlege durch mannigerlei Richtwege auffs beste/ rechtste und leichtste Teutsch und Lateinisch lesen und schreiben lernen mügen ; Mit einer vorrede und zu End angehengten Ethica scholastica ...
No full textMonitoring and evaluation of damaging of traditional cleaning techniques of stones with 3D optical microscopy profilometry
No full textIn cultural heritage cleaning techniques are very important and delicate operations, and they are necessary every time the surface of the stone is covered with mostly soiling material to avoid further degradation or alteration. The problem is that often during the cleaning operations, not only the alteration and the degradations are removed, but also part of the materials of the building stones and ornaments , thus damaging it irreversibly.
This paper investigates the effectiveness of 3D optical microscopy, used to monitor the surface of natural stones, such as Carrara marble, the Noto Limestone and the Serena Stone subjected to mechanical cleaning by micro-sandblasting.
Therefore, we focus on the evaluation of the effects of cleaning on new natural stones, taken from the quarry, through 3D mapping and the roughness profile. The selected samples were analysed with the Alicona IF-Portable optical profilometer before and after cleaning to monitor any morphological changes induced on the marble substrate
Bernhard Boyneburg (Barber) Collection ca. 1919-1975
No full textThe collection contains handwritten and typed manuscripts of essays by Bernhard Boyneburg about Richard Wagner and various other topics. Also included is the copy of a letter from the International Tracing Service of the Red Cross about the fate of Bernhard Barber, his wife and his son.Sophie B. Mann, October 2002Bernhard Barber was an author who published political and philosophical works under the name Boyneburg. He was born 1874 in Leipzig, but lived and worked in Vienna. In 1941, he, his wife Olga née Prager (b. 1897) and their son Eduard Fritz (b. 1905) were deported to the Ghetto in Lodz, where they perished. Barberâs daughter Sophie Mann survived the Holocaust.Bernhard Boyneburg''s published works include ,Die Despotie der Mittel, ihre Erkenntnis : die Grundlage rascher Voelkerversoehnung, Anzengruber, Wien 1919, and ,Der Weg aus dem Chaos: Neues zum Satze von der Despotie der Mittel, Amalthea, Zürich etc., 1927'.digitize
Heldenplatz by Thomas Bernhard
Full text linkopenL’opera teatrale Heldenplatz è l’ultima e tra le più importanti dello scrittore e drammaturgo austriaco Thomas Bernhard, pubblicata e rappresentata nel 1988. Il testo provocò uno scandalo in Austria ancora prima di essere messo in scena, poiché presenta critiche verso la società austriaca del secondo dopoguerra, ritenuta da Bernhard colpevole di non aver affrontato il proprio passato nazionalsocialista. Questa vicenda conferma la visione di Bernhard e dimostra l'importanza del teatro per la società.The play Heldenplatz is the last and one of the most important plays by the Austrian author Thomas Bernhard, and it was published and performed in 1988. It caused a scandal in Austria even before its release due to the presence of critical assertions regarding Austrian post-war society in the text. According to Bernhard, that society had not dealt with its nazist past. This reaction shows Bernhard's view to be correct and it highlights the importance of theatre for society
Thermodynamic modeling and experimental study of alkali-activated slag paste
No full textA newly developed thermodynamic approach was introduced from the literature to investigate the influence of NaOH content on the hydrate assemblage and chemistry of aqueous solution of activated slag paste (Na2O/slag=4%, 6% and 8%). The ICP-OES test was performed to obtain the aqueous species profiles such as Si, Ca, Al and Na etc. The elemental concentrations in aqueous solution show a similar trend between thermodynamic calculations and experimental results. The modeling results showed that the influence of NaOH content on the uptake of Na into the primary reaction products and chemical shrinkage depends on slag reaction extent and NaOH content. The NaOH content does not show an obvious influence on the porosity development. The volume fraction of primary products in total products is between 40% and 60%, and particularly increases slightly after a certain degree of reaction for activated slag with Na2O/slag=4% and 6%. The volume ratio between total products and reacted slag is around 1.5~1.7, smaller than the value from 2.06 to 2.2 reported for Portland cement.Materials and Environmen
Physico-chemical characterization of the Cartagena Wall and quarry material stone used for its restoration
No full textThe deterioration of historical structures is a topic of primary importance due to their historical, cultural and economic importance. Aggressive environments around structures can depend on anthropogenic factors such as NO2, SO2 gases among others, and environmental factors such as differential dilation, differential hydric dilation and crystallization. In the present study is proposed a physical-chemical characterization of the structure and quarry stone used for the replacement of deteriorated blocks of the defensive Wall of Cartagena, Colombia, UNESCO Cultural Heritage since 1984. X-ray and ionic chromatography identification were done in the structure stone. Furthermore, is proposed a Petrographycal comparison between structure and quarry material as well as mechanical characterization of the quarry material.
The structure is composed mainly by soft limestone. Similar phisico-chemical characteristics were found through X-Ray and Petrographycal comparison, while salt crystallization is found playing a secondary role in the structure deterioration
Use of rice husk ash for mitigating the autogenous shrinkage of cement pastes at low water cement ratio
No full textIt is well recognized that the high risk of early age micro-crack of HPC/UHPC is attributed to the large magnitude of early age autogenous shrinkage caused by self-desiccation in binder hydration. Over the years, several methods have been proposed to mitigate autogenous shrinkage based on internal curing theory, and a better internal curing agent is always being sought.Rice husk ash (RHA), was recognized having potencial to be an internal curing agent. In this paper, the effect of RHA on mitigating the autogenous shrinkage has been evaluated by different mean particle sizes of RHA, and the internal RH change was measured at the same situation. The results show a high efficiency of RHA for internal curing purpose, to drastically reduce the autogenous shrinkage of cement pastes. Comparing to the cement paste without RHA, the internal RH results show that the internal RH in pastes with RHA is evidently higher at either early or later ages. These were addressed in order to explain the mechanism RHA mitigates the autogenous shrinkage of pastes.Materials and Environmen
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