Italcementi

Gipieffe Architettura Studio Associato

Gian Luca Guerrini

Luigi Cassar

Roberta Alfani

Carmine Pepe

Jean-Pierre Grelaud

Nicola Pernicone

Antonio Migliacci

Vincenzo Collina

Luca Bottalico

Luigi Campanella

Valentina Trevisan

Fabio Borzetti

Giovanni Visco

Herein described are cementitious products and articles of manufacture comprising a carbon-doped titanium dioxide, having long-term photocatalytic activity. The titanium dioxide contained therein may be obtained by irradiating titanium dioxide under specific conditions of wavelength, in presence of a gas flow comprising an inert gas and an organic compound. The titanium dioxide thus treated acquires a high and stable carbon content, maintaining the specific surface area thereof substantially unaltered. The cementitious products/articles of manufacture containing it have a high and efficient photocatalytic action.

Cementitious products and articles of manufacture containing carbon-doped titanium dioxide

A new photocatalytic composition is described that is designed for percolation in road surfaces. The composition contains no aggregates, but consists of cement, a photocatalyst, a superfluidifier, a viscosity modifier and an antifoaming agent, in suitable proportions. The composition is applied to porous open-graded asphalt courses, completely filling the cavities down to a thickness coming between 30 and 50 mm. The treated asphalt acquires a strong, durable photocatalytic activity, even when it is submitted to heavy mechanical loads and adverse weather conditions, as in the case of road surfaces in and out of town, liable to intense traffic.

Paving with a pollution-abating activity and a photocatalytic mixture for its preparation

New photocatalytic cement compositions are disclosed. These contain a superfluidizing agent, a cellulosic ether with a defined viscosity, an adhesive polymer, and a lattice, as well as other standard ingredients for photocatalytic cements. The compositions are free of starch and its chemically modified derivatives.

Cement compositions with a high photocatalytic power and an improved rheology

The present invention relates to a process for the production by extrusion of piping made of a cementitious material having a circular section and fine thickness, suitable for the channeling of liquids and gases at atmospheric operating pressure or slightly higher.

Process for the production of piping made of a cementitious material having a circular section

A method for manufacturing a composite girder including one or more vertical cores of steel plate, associated and cooperating with one or more horizontal slabs or flanges of concrete. At least one of the horizontal slabs or flanges is made from high-performance concrete in order to allow mutual forces or co-actions to be imposed between the several components of the girder which are much higher/stronger than the mutual forces/co-actions which can be imposed by way of other methods and materials. If the composite girder is at least partially manufactured at the prefabrication factory, according to the present method, the starting element will be an I girder preflexed or inflexed with welded connections; the I girder will be positioned on the prefabricating bench imposing such constraints as to straighten the girder, then in a suitable position steel cables are installed prestressed between external anchoring points, and the concrete casting is carried out in a flange in which the cables are associated with high-performance concrete. After setting is complete, the auxiliary constraints are cut and removed. In such a way, the by now set concrete, by being integral with the iron girder thanks to the iron reinforcer elements and welded connections and with the cables by adhesion, causes the several components to mechanically cooperate and the composite beam to be endowed with much better characteristics.

Method for manufacturing a composite girder and so manufactured girder

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Milan, Italy

Gian Luca Guerrini