86,703 research outputs found
– Pesticidi organoclorurati: risultati sul loro accumulo nel tessuto adiposo sottocutaneo di individui sottoposti ad indagini autoptiche
No full textNote illustrative della Carta Geologica d'Italia alla scala 1:50.000, F. 253 Marradi.
No full text<p>Note illustrative redatte per il Foglio geologico n. 253 Marradi della Carta Geologica d'Italia alla scala 1:50.000. 88 pp.</p>
Materiali da demolizione di pavimentazioni stradali bituminose per la formazione di fondazioni e sottofondi
No full textPolishing resistance and mechanical properties of aggregates for asphalt concrete wearing courses
No full textPerformance of Cement Stabilized Recycled Crushed Concrete
No full textA study to advance knowledge concerning the performance and strength variability of cement
stabilized recycled crushed concrete mixtures for potential use as a stabilized base or subbase material
in road pavements was conducted, investigating mixtures composition. Grain size distribution tests
and composition analysis were thus carried out to characterize different recycled crushed concrete
mixtures. Mixture performance was evaluated in terms of unconfined compressive strength, indirect
diametrical tensile strength, elastic modulus, indirect tensile resilient modulus and durability.
Additionally, performance variations were examined in relation to the following items: mixtures
composition, curing time, concrete ageing of original mixtures, amount of fresh cement added.
Laboratory compaction of the aggregate mixed with 2% and 4% of fresh added cement was effected
using gyratory compaction. Specimens were cured in a controlled climatic chamber for 7 and 28 days.
The results indicate that in general, recycled concrete ageing and original characteristics
significantly affect the performance of cement stabilized crushed concrete mixtures. Investigations
also indicate that further detailed research is required to derive more extensive indications and also to
develop a means of acceptance based on strength, suitable for use in performance based specifications.
But overall, analysis of laboratory test results already indicates that given correct grading and other
properties, the recycled stabilized mixtures tested can be potentially reused for pavement base and
subbase layer construction
Kinetic evolution of the perpendicular turbulent cascade in the solar wind
No full textWe investigate the solar-wind dynamics at typical kinetic scales resulting from a turbulent cascade along the direction strictly perpendicular to a background magnetic field. We use a hybrid Vlasov-Maxwell numerical model that solves Vlasov equation for the proton distribution function. Electrons are assumed as an isothermal fluid. We find, over a range of about four decades of wavenumbers, a Kolmogorov slope at wavelengths larger than the proton inertial scale and an abrupt change in the scaling law across the proton inertial length. The energy is carried along the cascade in the form of magneto-sonic fluctuations while the short-scale termination of the spectra is dominated by a significant level of electrostatic activity. As a result of the turbulent energy cascade, we observe the generation of shock structures where the proton distribution function departs from the Maxwellian equilibrium configuration displaying the presence of beams of accelerated protons. Finally, quasi-static magnetic-field structures are produced in the early stage of the system dynamics and remain stable up to the end of the simulation. The numerical results discussed in the present paper qualitatively reproduce a complex phenomenology frequently recovered by spacecraft observations. Copyright (C) EPLA, 201
Preliminary investigation into the utilization of cupola slag as road construction material
No full textParametri Geotecnici Richiesti in Relazione al Problema di Ingegneria Civile: Il Corpo Stradale
No full textStudio e controllo di pavimentazioni stradali a bassa emissione sonora in ambito urbano
No full textRapporto di ricerc
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