Objetivo A material was developed which closely met the set objectives: A shrinkage compensating system efficient enough to eliminate autogeneous shrinkage cracking was developed, the material was composed to exhibit a suitable plastic/thixotropic rheology for pumping and spraying, the setting time was suitable for the applications in question, the acid resistance was roughly 5 times higher than for ordinary spraying mortar, and other properties were found to be at the DSP materials level. Although the new material was found to be significantly more difficult to pump than regular DSP materials, mixing and pumping equipment as well as a rotary spraying machine were developed to handle the material for sewer pipe rehabilitation. It was found possible to rotary spray a pipe lining up to 30 mm thick. Computer model calculations together with the results of tests on buried full size pipes showed that a considerable load bearing capacity was achieved by a 30 mm thick lining of the new strong material. Using a system for wet process spraying of the DUREP material, comprising mixer, pump and spraying equipment, crack-free repair patches on concrete test panels were produced which showed extreme denseness and bonding properties. An alternative system developed for dry process spraying of a modified DUREP material produced repairs which had a somewhat lower quality that that of the wet sprayed material but significantly higher than ordinary dry sprayed cement mortar repairs.The proposed project aims at developing low cost concrete repair and rehabilitation systems using a new durable, dense and strong cement-based material. The systems will comprise a sewer rehabilitation method based on a rotary spraying technique with the unique capability of recreating the original load-bearing capacity of the pipeline and, further, a concrete repair system based on a shotcreting technique capable of carrying out durable concrete repairs in one operation. The new material will be fully mineral based and without any environmental and working hygienic problems. It is expected that subsequent exploitation will lead to its use for corrosion protection of steel constructions and for the repair of degraded industrial floors.The major research tasks are:A. Development of a dense, high-strenght cement-based material with shrinkage compensation and improved acid resistance.B. Development of a rotary spraying technique capable of relining sewer pipelines in situ with the new material in large thicknesses.C. Development of a shotcreting technique for durable and cost-effective concrete repairs using the new material.Successfully completed, the repair and rehabilitation systems are expected to find very substancial markets world-wide. Ámbito científico medical and health sciencesclinical medicinephysiotherapy Programa(s) FP3-BRITE/EURAM 2 - Specific programme (EEC) of research and technological development in the field of industrial and materials technologies, 1990-1994 Tema(s) 1.5.2 - New construction industry materials Convocatoria de propuestas Data not available Régimen de financiación CSC - Cost-sharing contracts Coordinador DENSIT A/S Aportación de la UE Sin datos Dirección RODALSVEJ 44 - PO BOX 220 9100 AALBORG Dinamarca Ver en el mapa Coste total Sin datos Participantes (4) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo Aalborg Portland A/S Dinamarca Aportación de la UE Sin datos Dirección Rordalsvej 44PO Box 165 9100 Aalborg Ver en el mapa Coste total Sin datos E HEITKAMP ROHRBAU GMBH Alemania Aportación de la UE Sin datos Dirección HEINRICHSTRAßE 67 4630 BOCHUM Ver en el mapa Coste total Sin datos RUHR-UNIVERSITÄT BOCHUM Alemania Aportación de la UE Sin datos Dirección UNIVERSITÄTSSTRAßE 150 4630 BOCHUM Ver en el mapa Coste total Sin datos VAN HATTUM EN BLANKEVOORT BV Países Bajos Aportación de la UE Sin datos Dirección KORENMOLENLAAN,2 3447 GG WOERDEN Ver en el mapa Coste total Sin datos
