CORDIS provides links to public deliverables and publications of HORIZON projects.
Links to deliverables and publications from FP7 projects, as well as links to some specific result types such as dataset and software, are dynamically retrieved from OpenAIRE .
Exploitable results
Paval is an aluminium oxide obtained after the processing and reacting of saline slag obtained from aluminium recycling. Its important production qualtity makes it desirable to realize an assessment of its potential market, of bulk quantities, in the construction sector. Other types of applications are also potential market, of bulk quantities, in the construction sector. Other types of applications are also possible: the production of cement clinker, ceramics, insulating fibres, glass-ceramics, land filling, etc.
The results obtained in the application of unrefined Paval in mortars, initially substituting part of the cement indicate the need to improve the material since a great reaction and porosity is produced in the material obtained. Subsequent trails with material elaborated according to the established procedures, and substituting 25-50% of the aggregate, show how Paval increases the mechanical strength of mortars. Endurance trails demostrate that strength decrease with time under specific wet-dry condictions. A great effort has been made to find an explanation for this phenommenon, with trails and microscopic analysis, and to seek a way of avoiding it.
Technological trials have demostrated that Paval can be used for apllications in specific types of non structural responsibility construction at ground level: pipes, paving stones, terrazzos, kerbs, fillers, artificial soil, pots, etc. The existing market is large enough, and the appaisement of the material too, to meet current production. The reality of this market has been studied by sending out trucks of the material to several different companies in the sector which use Paval with success and without any great different companies in the sector which use Paval with success and without any great difficulty as far as durability is concerned, due to the limited reponsibility of the pieces it is used for.
The tests performed with concrete apllications show that Paval is an adequate sustitute for cement, when low grain size is used, as it reduces material permeability and thus increases durability. When sustituting concrete aggregates, low grain Paval conferes higher mechanical strength and enhanced durability properties, as compared with reference concretes, and specially as far as ion chloride penetration is concerned.
The light weight aggregate application has been analized as a form of using the larger grain size part of Paval. A thermal process able to transform Paval (all freactions up to max size 1.4mm) into useful products for the building industry (e.g. lightweight aggregate for mortar) has been obtained. The obtained material presents bulk density lower than 1000 kg/m3 and can be therefore classified as lightweight aggregate. The product is environmentally safe according to results of the leaching test. The following economical feasibility study of this applications show potential profits for a plant producing 200000 Tn/year.
The process apllied to the production of Paval will have future apllications for the rendering inert of other reisues from the aluminium industry, from whcih other secondary raw materials can be produced in an integral treatment plant. Eventually, Paval could be the consequence of the treatment of several different materials.
Searching for OpenAIRE data...
There was an error trying to search data from OpenAIRE
No results available