Objective
AIR PLACED TECHNIQUES - GUNITE AND SHOTCRETE - ARE COMMONLY USED IN CIVIL ENGINEERING FOR WALL REINFORCEMENT WITH CEMENT BASED MATERIALS.
GUNITE IS A TRADE NAME TO DESIGNATE A MIXTURE OF PORTLAND CEMENT AND SAND THOROUGHLY MIXED DRY, PASSED THROUGH A CEMENT GUN AND CONVEYED BY AIR THROUGH A FLEXIBLE TUBE, HYDRATED AT A NOZZLE AT THE END OF SUCH FLEXIBLE TUBE AND DEPOSITED BY AIR PRESSURE. IN THE CASE OF SHOTCRETE, A PROPORTIONED COMBINATION OF PORTLAND CEMENT, AGGREGATES AND WATER IS MIXED BY MECHANICAL METHODS AND PUMPED IN A PLASTIC STATE TO THE NOZZLE WHERE AIR IS ADDED TO EXPEL THE MATERIAL.
THESE TECHNIQUES ARE LIKELY TO BE USED FOR ENGINEERED BARRIER EMPLACEMENT DUE TO THE FACTS THAT :
- SPRAYING MACHINES ARE COMMERCIALLY AVAILABLE AND EASILY AUTOMATIZED FOR NUCLEAR APPLICATIONS,
- THEIR DELIVERY (10 M TO THE POWER OF 3 /H) IS COMPATIBLE WITH THE FRENCH NEEDS OF TRU WASTE DISPOSAL IN GALLERIES.
THE RESEARCH PROGRAM, DEVELOPED WITHIN THE FRAMEWORK OF THIS CONTRACT, IS DEVOTED TO TEST AIR PLACED MORTAR ABILITY TO FILL UP THE VOIDS BETWEEN THE WASTE PACKAGES AND THE HOST ROCK. MATERIALS AND TECHNIQUES WILL BE OPTIMIZED TAKING INTO ACCOUNT AIR PLACED MORTAR PROPERTIES SUCH AS DENSITY, PERMEABILITY, WATER TRANSFER, RADIONUCLIDE RETENTION, ETC...
1. LITERATURE SURVEY : CHOICE BETWEEN THE TWO PROCESSES (DRY OR WET); RECOMMENDATIONS FOR THE SELECTION OF THE MOST APPROPRIATE EQUIPMENT; DEFINITION OF THE TEST SPECIFICATIONS.
2. FEASABILITY TESTS : CHOICE BETWEEN DIFFERENT TYPES OF MATERIALS, TAKING INTO ACCOUNTCEMENT TYPES, ADDITIVES (CLAY, SILICA FUME), PLASTICIZERS, AGGREGATES GRANULOMETRY DISTRIBUTION.
3. FULL SCALE STUDY OF THE SELECTED MATERIAL : SPRAYING CYCLE DEFINITION, REBOUND INFLUENCE ON AIR PLACED MATERIAL HOMOGENEITY.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- engineering and technology environmental engineering waste management
- engineering and technology civil engineering
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
91191 Gif-sur-Yvette
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.