Obiettivo Alkali Aggregate Reaction (AAR) is today reported in numerous countries around the world. Many researchers within the field of concrete technology are dealing with this topic. In the last years, the number of papers on AAR has increased very much as seen from e.g. the proceedings from the conferences 'Durability of Building Materials and Components' and 'International Conference of Alkali Aggregate Reaction'. The reaction mechanism is very complex and depends on the type of geological material. For example, in Denmark the reactive aggregate is low density porous flint, in United Kingdom chert, in Belgium porphyries rocks, in Sweden limestone's and mylonitic rock, in Norway different types of dense volcanic rocks, quartzite and other high density rocks; in other of the European countries there is no knowledge of the type of reactive aqgregate. In some of the European countries there are strong restrictions on aggregates due to AAR. These restrictions are based on national standard tests generally built on empirical knowledge of the national types of aggregates. In Denmark there are only restrictions on low density flint and the national tests will accept imported high density reactive aggregate without any problems even if the aggregate is reactive measured by other methods. Similar situations exists in other countries. There are, at the moment no CEN or ISO effort to solve the problems of testing for reactive alkali aggregate rocks. A RILEM group, in which several of the partners are participating, are working in the similar area, but in world scale. The RILEM procedure is, however, extremely slow and results can probably first be achieved on a 10 - 20 years basis. The coming European standard for concrete aggregates proposed by the committee CEN/TC154/SC the document 'Proposed draft for aggregates for concrete including those for use in roads and pavements', January 1994, suggest that 'The combination of aggregates and cement shall be assessed using procedures described in the national standards and regulations valid in the place of use'. The proposed draft does not take in account inadequate national test procedures for imported aggregates. It is the purpose of this project to elucidate the different test methods used in the European communities and suggest a set of standard test methods. The foreseen project results will enable researcher to assess AAR in a more sense way when designing new concrete products and hence secure concrete quality. It is believed that Round Robin test and an European recommendation could be adopted within 2 - 3 years after completion of the present project. Programma(i) FP4-SMT - Specific research and technological development programme in the field of standards, measurements and testing, 1994-1998 Argomento(i) 02 - Research related to written standards and technical support to trade Invito a presentare proposte Data not available Meccanismo di finanziamento CSC - Cost-sharing contracts Coordinatore PC LABORATORIET A/S Contributo UE Nessun dato Indirizzo 7,Maagevej 7 9690 FJERRITSLEV Danimarca Mostra sulla mappa Costo totale Nessun dato Partecipanti (6) Classifica in ordine alfabetico Classifica per Contributo UE Espandi tutto Riduci tutto Building Research Establishment (BRE) Regno Unito Contributo UE Nessun dato Indirizzo Bucknall's Lane Garston WD2 7JR Watford Mostra sulla mappa Costo totale Nessun dato Danish Road Institute Danimarca Contributo UE Nessun dato Indirizzo 5,Elisagaardsvej 4000 Roskilde Mostra sulla mappa Costo totale Nessun dato FOUNDATION FOR TECHNICAL AND INDUSTRIAL RESEARCH AT THE NORWEGIAN INSTITUTE OF TECHNOLOGY Norvegia Contributo UE Nessun dato Indirizzo 153,Rich. Birkelandsvei 3 7465 TRONDHEIM Mostra sulla mappa Costo totale Nessun dato Institut Scientifique de Service Public Belgio Contributo UE Nessun dato Indirizzo 200,Rue du Chéra 4000 Liège Mostra sulla mappa Costo totale Nessun dato OZ - Diagnostico, Levantamento e Controlo de Qualidade em Estructuras e Fundaçoes Lda. Portogallo Contributo UE Nessun dato Indirizzo 45/1,Rua Pedro Nunes 1050 Lisboa Mostra sulla mappa Costo totale Nessun dato SP SWEDISH NATIONAL TESTING AND RESEARCH INSTITUTE Svezia Contributo UE Nessun dato Indirizzo Brinellgatan, 4 501 15 BORAAS Mostra sulla mappa Costo totale Nessun dato