Snamprogetti S.p.a.

Eniricerche S.p.a.

Dario Ercolani

Elio Donati

Edoardo Platone

Vincenzo Lagana

Aldo Prevedello

Virgilio Arrigoni

Francesco Ferrini

A concrete composition contains hydraulic cement, inerts, water and superfluidifying additive obtained by salifying, in the form of an alkaline metal, alkaline earth metal or ammonium salt, the sulphonated and oxidised products resulting from the reaction between sulphur trioxide and fuel oil deriving from steam cracking. This concrete composition has improved workability characteristics and enables concretes to be obtained generally possessing greater strength and durability.

Concrete composition containing a superfluidifying additive

A method is described for preparing a high-concentration solids suspension, in particular coal or petroleum coke, which can be transported by pipe and be burnt with low emission of harmful substances, comprising crushing the solid to be suspended to a maximum particle size of 6 mm and then grinding it in the presence of additives in aqueous solution to a maximum solid particle size of 300 .mu.m, the method being characterized by adding, either before the crushing or immediately before the grinding, a desulphurizer chosen from CaCo.sub.3, MgCO.sub.3 and dolomite, either alone or in mixture, in a molar ratio to the sulphur contained in the solid of between 1.5 and 3, and adding immediately before or during grinding a desulphurizer also possessing stabilizing and anticorrosive properties and chosen from MgO, Mg(OH).sub.2, CaO and Ca(OH).sub.2, either alone or in mixture, in a quantity of between 0.04 and 0.4% by weight of the final suspension.

Method for preparing a high-concentration solids suspension in water

An electric device is disclosed which is intended to detect and to signal the beginning of the settling of the solid phase of a solid-in-liquid suspension of a particulate, said suspension flowing in a duct for long-distance conveying of said particulate. The device essentially comprises a set of polarizing electrodes and a set of detecting electrodes. The signals delivered by the device are properly displayed after processing and characteristic patterns of the suspension flow can be viewed on an oscilloscope or, if desired, graphically recorded.

Device for detecting the initial settling of the solid phase in

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Fano, Italy

Dario Ercolani