Quartz stone

Using of stones for making the building is the art which is going since stone ages in various forms like caves, pyramids, temples and many more but now a days we are studying about stones how to use it in construction of buildings more appropriately. The concept requires much more studies regarding demand and infrastructure on micro and macro level. The aim of study is to explore what are basic infrastructural demands of new era.

Polished lapis ; size of specimen = 5,5 x 6,5 cms.

The only Greek-English Mineralogical Magazine for Collectors in Europe.

The granite formation for production of dimension stone blocks at Utan was investigated in three different locations A, B and C in a view to examine the physical properties of Utan granite using saturation and Buoyancy technique; evaluate some of its mechanical properties; determine its rate of emission of radioactive elements with Geiger Muller Counter; examine its polish-ability; and carry out chemical analysis of the granite samples with the aid of energy dispersive x-ray florescence (ED-XRF). The average porosity obtained is 0.53, 1.08; and 0.86 while the respective average density of 2.58, 2.62 and 2.60 g/cm 3 were obtained for A, B and C. The compressive strength of 207.5, 204.6 and 203.4 MPa; and tensile strength of 13.86, 13.68 and 13.60 MPa were obtained for A, B and C respectively. Rockwell hardness values obtained are 89.0, 89.9 and 86.6 while the morh's hardness values are 6.90, 6.96 and 7.03 respectively for sample A; B and C. The impact values obtained are 0.089, 0.092 and 0.094 for A, B and C respectively. The radioactive rates of samples A, B and C are 6.42, 8.86 and 8.16 Mrem respectively. Sample B is observed to be more radioactive. Both samples are polish able. Conclusively, the three tested granite rocks have suitable physical and mechanical properties that meant the requirement for building purposes; from the polish-ability test, it shows that the three (3) granite outcrops are suitable for the production of granite tiles; countertops; slabs. The chemical analysis revealed that the granite is dominated by quartz (SiO 2) which contributes greatly to the hardness of the rock. Also from the radioactive test, the granite samples proved conclusively that the rate of radiation found occasionally in a slab of granite is not harmful to humans when exposed to it. Hence, granite the formation of Utan will be a good building stone material.

Applied Surface Science, 2013

A TiO 2 -SiO 2 nanocomposite material was formed inside the pore structure of a very friable carbonate stone by simple spraying of a sol containing silica oligomers, titania particles and a non-ionic surfactant (n-octylamine). The resulting nanomaterial provides an effective adhesive and crack-free surface layer to the stone, and gives it self-cleaning properties. In addition, it efficiently penetrates into the pores of the stone, significantly improving its mechanical resistance, and is thus capable of converting an extremely friable stone into a building material with self-cleaning properties. Another important advantage of the nanocomposite is that it substantially improves protection against salt crystallization degradation mechanisms. In the trial described, the untreated stone is reduced to a completely powdered material after 3 cycles of NaSO 4 crystallization degradation, whereas stone treated with this novel product remains practically unaltered after 30 cycles. For comparison purposes, two commercial products (with consolidant and photocatalytic properties) were also tested, and both alternative materials produced coatings that crack and provide less mechanical resistance to the stone than this product. These results also confirm the valuable role played by n-octylamine in reducing the capillary pressure responsible for consolidant cracking, and in promoting silica polymerization inside the pores of the non-reactive pure carbonate stone.

The granite formation for production of dimension stone blocks at Utan was investigated in three different locations A, B and C in a view to examine the physical properties of Utan granite using saturation and Buoyancy technique; evaluate some of its mechanical properties; determine its rate of emission of radioactive elements with Geiger Muller Counter; examine its polish-ability; and carry out chemical analysis of the granite samples with the aid of energy dispersive x-ray florescence (ED-XRF). The average porosity obtained is 0.53, 1.08; and 0.86 while the respective average density of 2.58, 2.62 and 2.60 g/cm 3 were obtained for A, B and C. The compressive strength of 207.5, 204.6 and 203.4 MPa; and tensile strength of 13.86, 13.68 and 13.60 MPa were obtained for A, B and C respectively. Rockwell hardness values obtained are 89.0, 89.9 and 86.6 while the morh's hardness values are 6.90, 6.96 and 7.03 respectively for sample A; B and C. The impact values obtained are 0.089, 0.092 and 0.094 for A, B and C respectively. The radioactive rates of samples A, B and C are 6.42, 8.86 and 8.16 Mrem respectively. Sample B is observed to be more radioactive. Both samples are polish able. Conclusively, the three tested granite rocks have suitable physical and mechanical properties that meant the requirement for building purposes; from the polish-ability test, it shows that the three (3) granite outcrops are suitable for the production of granite tiles; countertops; slabs. The chemical analysis revealed that the granite is dominated by quartz (SiO 2 ) which contributes greatly to the hardness of the rock. Also from the radioactive test, the granite samples proved conclusively that the rate of radiation found occasionally in a slab of granite is not harmful to humans when exposed to it. Hence, granite the formation of Utan will be a good building stone material.

2017

With this anniversary publication we celebrate 20 years of urban design at Aalborg University. The contributors to the publication are students, graduates, and faculty members, who have generously sharpened their pens and minds for this diverse collection of essays and accompanying illustrations. The resulting collaborative catalogue celebrates urban design teaching and research at AAU, and the urban design practice by graduates from this program. Authors have been invited to contribute with a brief essay, focused on a pertinent urban design issue of their own selection. Together they form a rich collection of subjects, concepts, objects, projects, and questions, which have been-and still are-on our minds in urban design throughout the past 20 years. The richness and variation demonstrated by the catalogue is in keeping with urban design's orientation towards diverse considerations when addressing contemporary urban challenges. The past years of AAU urban design endeavours have demonstrated that urban design is about acting within networks of multiple interests, concerns, stakeholders, and other actors. Urban design is perhaps well conceived of as a sensibility of the 'urban-minded', as Harvard GSD dean José Luis Sert suggested at the world's first Urban Design conference in 1956. This somewhat indefinite inception for urban design still persists, and clarity of definition seems to be defied. Rather, in the engaged attempts to operate with synthesis in the ever-changing complexity of the urban condition, urban design's elusive mandate and purpose remains in debate. If attempting to stir up this hornet's nest of urban design's contemporary raison d'etre and scope, multiple co-existing positions impose themselves. Just some of these include: Koolhaas' radical Fuck Context and push to leave architectural delusions of potency and splendor, next to Gehl's human-friendly 'let's meet between the buildings' agenda, next to Mostafavi's optimistic call for a cross-disciplinary sensibility to respond to the ecological crisis, next to Harvey's sturdy emphasis on power, justice, and the right to the city, next to Jacobs' and Appleyard's manifesto of e.g., livability, community, and public life as normative goals of urban design. This multiplicity suggests that to be an urban designer demands skillful and flexible navigation across complex issues of cities and countrysides. Urban designers must work with many elements with meticulousness and readiness. We must strive to continuously adapt to situations and to even be at the forefront of change. This also applies to urban design teaching and research at AAU, as well as to the practices of graduates. For these reasons, this publication offers its modest space for engaged professionals and students to address the diversity and variation of urban design through what they determine to be pertinent urban design matters. Thus, the contemporary versatility of urban design is reflected in this kaleidoscopic catalogue, addressing such diverse issues as urban design's social ambitions; affective encounters of urban space; the conceptualisation of spaces, landscapes, and buildings; relationships between local sites and global change; ecology; events and culture in the city; urban design's role in a complex field of interests and actors driving urban development and planning; dreams of the future; technologies; continuous urban change; experimental methods; and disputed concepts. We are proud to present these voices, and we invite you to dive into them. Thanks to all the contributors for sharing! Last but not least, thanks to the Spar Nord Foundation for its generous funding of this publication, as well as to the Study Board of Architecture & Design and to the Section of Architecture & Urban Design at the

Abstract: This paper tries to observe the character of Rosie and trace the evolution that she goes through in the novel "The Guide" by R.K.Narayan. As a result of her bold actions, it is often thought that she is very different from common Indian women. I have tried to show that in reality she is just like our diverse Indian culture which conceives both tradition and modernity. Her desires, dilemmas and decisions can happen only to an Indian woman. She may seem ahead of her time but certainly contemporary in 2014. Thus even today’s modern Indian women can identify themselves with Rosie. In fact her journey towards self establishment somehow forecasts the evolution of women's role in the Indian society. Rosie in this aspect stands as a quintessential Indian woman. Key Words: Art, Culture, Hegemony, Identity, Revolution, Womanhood