Roman pottery excavated from the remains of a villa rustica near Mošnje (Slovenia) was analyzed in terms of its mineralogical and basic geochemical characteristics, to elucidate the technologies of manufacture. Selected samples were examined with optical microscopy, X-ray powder diffraction, SEM–EDS and ICP-OES. Results show that the studied pottery samples can be divided into two main groups based on the nature and size of grains; calcite-tempered pottery and pottery containing predominant fine quartz grains. This mineralogical distinction also reflects differences in production technology.
F.02 Acquisition of new scientific knowledge
COBISS.SI-ID: 951902The environmental aspects of waste building materials have been of great interest in recent years. For the sector of building materials this means increased recycling, reduction of energy consumption and natural resources preservation. This also presents an important contribution in the field of environmental protection. The work presented here deals with the development of pozzolanic mortars made of waste building materials, ground red structure bricks and raw clay materials of inadequate characteristics for the production of ceramic materials. Based on the results of historical mortar characterizations, a group of mortars with specific characteristics (satisfied durability, good compatibility with a historical mortar) was prepared. The potential of the waste materials and domestic clay materials application in the production of pozzolanic mortars was confirmed. In addition to the waste management, pozzolanic mortars were designed taking into account the existing conventions in the area of cultural heritage.
F.27 Contribution to preserving/protecting natural and cultural heritage
COBISS.SI-ID: 1931623During the bonding of wood with liquefied wood deterioration of wood surface occurs, which results in a high percentage of wood failure at relatively low shear strength of bonds. Light microscopy, scanning electron microscopy, FT-IR microspectroscopy and CNS analysis techniques were used to elucidate and analyse the formation of bonds. It was ascertained that in cells of surface of bonded lamellas, a degradation of lignin, hemicelluloses and amorphous parts of cellulose occurred. At elevated temperatures degraded products underwent potential condensation reactions among themselves and deteriorated cells carbonized to some extent. The weak point of the bond was determined to be a line of delignified cells which remained present between the zone of carbonized cells and condensed products, and cells of undamaged wood. A bond formed during the bonding of wood with liquefied wood was found to be very untypical compared to bonds formed by synthetic wood adhesives.
F.10 Improvements to an existing technological process or technology
COBISS.SI-ID: 2058889A new bridge weigh-in-motion (WIM) algorithm is developed which makes use of strain sensors at multiple longitudinal locations of a bridge to calculate axle weights. The optimisation procedure at the core of the proposed algorithmseeks to minimise the difference between static theory and measurement, a procedure common in the majority of bridge WIM algorithms. In contrast to the single unique value calculated for each axle weight in common Bridge WIM algorithms, the new algorithm provides a time history for each axlebased on a set of equations formulated for each sensor at each scan. Studying the determinant of this system of equations, those portions of the time history of calculated axle weights for which the equations are poorly conditioned are removed from the final reckoning of results. The accuracy of the algorithm is related to the ability to remove dynamics and the use of a precise influence line. These issues are addressed through the use of a robustmoving average filter and a calibration procedure based on using trucks from ambient traffic. The influence of additional longitudinal sensor locations on the determinant of the system of equations is discussed. Sensitivity analyses are carried out to analyse the effect of a misread axle spacing or velocity on the predictions, and as a result, the algorithm revealsan ability to identify potentially erroneous predictions. The improvement in accuracy of the calculated axle weights with respect to common approaches is shown, first using numerical simulations based on a vehicle-bridge interaction finite-element model, and second using experimentaldata from a beam-and-slab bridge in Slovenia.
F.10 Improvements to an existing technological process or technology
COBISS.SI-ID: 1938535A brief report about the liquefaction damage in the Tone river basin, caused by the 2011 earthquake off the Pacific coast of Tohoku, is presented. It includes sand boiling, damage to river dikes, the settlement and tilt of superstructures, the uplift of light underground structures and lateral spreading. A history of land reclamation along the Tone river is briefly presented to understand why extensive liquefaction took place predominantly in reclaimed land. The recorded ground motions near the river were analyzed and compared to near-source ground motions. The effects of the site location and the ground conditions during the peak ground acceleration are discussed.
F.30 Professional assessment of the situation
COBISS.SI-ID: 1935207