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Contenuto archiviato il 2024-04-15

IN-SITU SEALING OF CONCRETE SURFACE BY ORGANIC IMPREGNATION AND POLYMERISATION.

Obiettivo

THE IMPREGNATION BY RESINS OF CONCRETE STRUCTURE IS A PROCESS KNOWN AS PIC (POLYMER IMPREGNATED CONCRETE). THIS PROCESS CONSISTS OF DEHYDRATION OF CONCRETE, INJECTION OF MONOMER AND THERMOPOLYMERISATION OF THE RESIN. THE PIC PROCESS IS UTILISED TO IMPROVE THE CHEMICAL AND PHYSICAL BEHAVIOUR OF CONCRETE STRUCTURES, IN ORDER TO EXTEND THE LIFETIME OF BRIDGES AND VIADUCTS UNDER HEAVY TRAFFIC AND SEVERE ATMOSPHERIC CONDITIONS. IN THE NUCLEAR FIELD THE PIC PROCESS IS BEING DEVELOPED FOR IMMOBILISATION OF RADIOACTIVE WASTES.

THE OBJECTIVE OF THIS RESEARCH IS TO OPTIMISE THE PIC TECHNIQUE FOR HORIZONTAL, VERTICAL AND SUBVERTICAL CONCRETE SURFACES.

IN A NUCLEAR FACILITY THE IMPREGNATION OF CONCRETE STRUCTURE IS EXPECTED TO GIVE THE FOLLOWING ADVANTAGES :

- INCREASE OF MECHANICAL RESISTANCE TO IMPACT LOADS,WEAR AND DETERIORATION;

- INCREASE OF LEACH RESISTANCE;

- INCREASE OF THE MECHANICAL RESTRAINTS LOAD CAPABILITY;

- NO MAINTENANCE REQUIRED DURING PLANT OPERATING LIFETIME;

- LONG-TERM INTEGRITY AFTER FINAL SHUTDOWN OF THE PLANT;

- VERY LOW CAPABILITY TO ABSORB CONTAMINANTS BECAUSE OF FULL OCCLUSION OF ALL POROSITIES OF CONCRETE STRUCTURE.

THE RESEARCH IS MAINLY DIRECTED TO VERIFY THE ABOVE-MENTIONED POINTS BY DESIGNING, MANUFACTURING AND TESTING PROTOTYPE EQUIPMENT. THE RESEARCH PROGRAMME WILL BE JOINTLY CARRIED OUT WITH ITALCEMENTI SPA.
The material produced by the impregnation of concrete by resins is widely known as polymer impregnated concrete (PIC). This process is normally used to improve the physical chemical features of prefabricated items, in particular to lengthen their lifetime under severe environmetal conditions. The main target of this research was the verification of the possibility of a proper impregnation of existing concrete surfaces, of any dimensions and position, by comparing the obtained characteristics with those of untreated original material to check the improvement of chemical physical properties and durability.
B.1. DESIGN, MANUFACTURING AND IMPLEMENTATION OF SPECIAL PROTOTYPE DEVICE FOR IMPREGNATION BY RESINS OF CONCRETE STRUCTURES.

B.2. PRE-OPERATIONAL TESTS ON CONCRETE STRUCTURES HAVING DIFFERENT SURFACES, IN ORDER TO VERIFY CAPABILITY OF EXPERIMENTAL EQUIPMENT TO PERFORM THE INJECTION OF THE MONOMER IN ALL DIRECTIONS.

B.3. OPTIMISATION OF THE PIC PROCESS PARAMETERS (TEMPERATURE, VACUUM DEHYDRATION, MONOMER PRESSURE INJECTION, ETC.)

B.4. QUALIFICATION OF THE PIC PROCESS INCLUDING COMPARISON OF THE PROPERTIES OF THE CONCRETE MATRIX BEFORE AND AFTER THE PIC TREATMENT (MECHANICAL AND CHEMICAL TESTS, POROSITY MEASUREMENT, ETC.).

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CORDIS classifica i progetti con EuroSciVoc, una tassonomia multilingue dei campi scientifici, attraverso un processo semi-automatico basato su tecniche NLP. Cfr.: Il Vocabolario Scientifico Europeo.

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Coordinatore

Compagnia Tecnica Internazionale SpA Techint
Contributo UE
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Indirizzo
Corso Venezia 48
20121 Milano
Italia

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