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[en] In 1976 two tile kilns with numerous wasters of ornamented tiles were excavated at Bistrup near Roskilde. Identical ornaments had earlier been found on floor-tiles from seven sites, mainly churches, in north and east Zealand. The question arose whether some of these tiles were made locally or whether all tiles carrying this particular ornamentation were made at Bistrup. Preliminary results obtained from a comparison of the tiles with material from Bistrup means of neutron activation analysis indicate that not all tiles were made at Bistrup. (author)
[en] Specification with metric dimensions for two systems of interlocking lead bricks for building permanent or temporary shielding walls including numbering system with illustrations, and schedule for ordering purposes. (author)
[en] The form-fitting brick allows to form simple geometric figures like straight lines, angles, polygons and crosses and to cover surfaces homogeneously without making use of another shape of brick. The brick has got superficies consisting of plane rectangular quadrangles part of which showing a concave connecting contour for the adjoining brick which has got a convex connecting contour. According to the invention both external ends of the concave connecting contours are shaped as reinforcing ribs. The bricks may be manufactured from concrete. The description mentions some variants. (UWI)
[de]Der Strahlenschutz-Formbaustein erlaubt es, einfache geometrische Figuren wie Geraden, Winkel, Vielecke und Kreise zu bilden und Flaechen homogen auszulegen, ohne dass auf eine andere Steinform zurueckgegriffen wird. Der Stein besitzt Mantelflaechen aus ebenen rechtwinkligen Vierecken, ein Teil der Mantelflaechen weist eine konkave Anschlusskontur fuer den benachbarten Stein auf, der eine entsprechende konvexe Anschlusskontur besitzt. Erfindungsgemaess sind die beiden aeusseren Enden der konkaven Anschlusskonturen als Verstaerkungsrippen ausgebildet. Die Steine koennen aus Beton ausgefuehrt werden. Die Beschreibung gibt einige Varianten an. (UWI)
[en] A new, 'arithmetic', approach to the algebraic theory of brick tilings is developed. This approach enables one to construct a simple classification of brick tilings in Zd and to find new proofs of several classical results on brick packing and tilings in Zd. In addition, possible generalizations of results on integer brick packing to the Euclidean plane R2 are investigated
[en] Due to the new proposed Israeli approach for radioactivity in construction materials (IS 5098) issued in 2007, the radon emanation of a construction material, a brick in the form of a box (a rectangular parallelepiped), should be checked when its four faces are insulated in order to achieve the same simulation effect when a concrete block is embedded into a wall. A physical model was developed in order to measure the insulation level (quality) of a building product (bulk concrete, building block, tiles, etc.) when its four sides are insulated by various materials. Under the experimental conditions it was found that the insulation level for bulk concrete was 99.5 ± 0.04% which is in good agreement with the requirement of the new Israeli Standard IS 5098. The influence of aging of concrete materials on radon emanation and the emanation ratio, deduced from measurements of insulated and non-insulated materials, was investigated.
[en] A removable closure for an opening in a vertical wall especially for a room containing radioactive materials is made of brick layers without mortar. Horizontal cross section of concrete bricks is parallelogram shaped except in the center where it is trapezoidal, this design requires no supporting structure
[fr]On realise la cloison pour obturer une ouverture verticale, notamment dans la paroi d'une salle contenant des matieres radioactives, par une couche de briques empilees a sec. La section horizontale de chaque brique a la forme d'un parallelogramme sauf au centre ou c'est celle d'un trapeze. La tenue aux seismes est assuree sans ossature de maintien
[en] Linear attenuation coefficients of regular as well as irregular shaped archaeological samples of FaLG (flyash-lime-gypsum) of unknown thickness have been measured employing 'simplified two media' method. Seven different liquid materials plus air have been used as media to measure attenuation coefficient of these samples. Obtained results have been compared with those for regular shaped samples. Experimental values have also been compared with theoretical values calculated from FFAST and XCOM. A good agreement has been observed between experimental and theoretical values. Present measurements employing 'simplified two media' method have been reported for the first time for checking its validation and reliability. - Highlights: → Linear attenuation coefficients were measured. → Irregular shaped FaLG archaeological samples were of unknown thickness. → Use of FaLG bricks as an eco-friendly construction material. → Simplified two media method was used and experimentally tested.
[en] Lack of knowledge related to laboral risk prevention measures within a building consruction results as the main causes of material loss but most important human loss, during the execution construction face.