Technological innovation in the manufacturing processes of clinker and cement
The technological innovation that we achieve with the Inorganic Theory of the Combustion, applied to the cement industry, has allowed us to defi ne with clarity the technology and procedures adapted to optimize the combustion, forming conical hollow flame in the oven and assuring combustion completes in the precalcinator, permitting to achieve an efficient thermodynamic control in the whole system of production of clinker.
The applied investigation that we have developed in this field has allowed us to establish that on having simplified and to optimize the combustion, there opens itself a world of possibilities of technological innovation in the operations and processes of clinkerization that constitute projects of investment of high technical, economic and ecological profi tability. The 10 projects that we mention in this article only represent “the top of the iceberg” of a world of possibilities of that we try to develop and to take advantage, working with the excellent engineers of cements plant of Latinoamerica.
Optimization of exploitation costs in a cement plant in Dominican Republic
The present document defi nes the works realized by Bakken Engineering in the Dominican Republic for the second cement producing company, in order to improve the exploitation costs of a plant with obsolete design and other difficulties.
The company detected some problems regarding the raw materials and also the high thermal and electrical consumptions related to an obsolete plant. Bakken’s performance started with the development of a managing team, following the development with actions focused in the search for new quarries, the modifications of low investment in the only dry kiln, stopping the wet kilns, as well as investigation of the use of active additives, imported or those existing in the country (pozzolans, thermal ash, slag, waste brickworks, etc). This last aspect was the most time consuming, since it was necessary to reject the use of some additives due to their costs (in general, the imported ones), or due to their low activity.
The results were clearly positive: drastic decline of thermal and electrical consumption, decline of the factor clinker/cement in an average greater than 90% to a factor less than 72% and a drop in the exploitation cost of more than 40%.
Application of concrete advanced technologies to sewerage manholes
Concrete manholes and inspection chambers, unreinforced, steel fibre and reinforced, are those construction products designed as vertical and airtight structures which permit the access to sewerage and drainage systems, also used for the control on such facilities, to assemble their components or modify its layout. This article pretends to show the regulatory advances on these precast concrete elements which last stage has been the updating of the Spanish Annex UNE 127917, which complements the European Standard EN 1917.
Damages caused by capillary suction in building materials
Damages caused by capillary suction of water and disolved salts in building materials of old and even new constructions is so common in our towns and cities that is part of our everyday life. This physical phenomenon is usually not considered during the design phase when it is easy and cheap to solve properly, this also happens with concrete specified using the EHE 08 standard to have a defined permeability to water but nearly never tested after execution.
The capillary suction is ruled by Jurin’s Law, understanding the origin of the forces it is clear how to solve this problem, either changing the material’s pores size, plugging them with hidrostructural resins or changing the contact angle of water-material with hidrophobe impregnations based in silane-siloxane formulations.
Recycling and waste recovery in the Spanish cement industry (update year 2014)
This is the sixth update of the study “Recycling and waste recovery in the Spanish cement industry”, carried out by Institut Cerdà, that shows the evolution of energy and material valorization in cement plants in the last years. The regular updating of the, has the objective to become a permanent observatory regarding the situation of the cement plants that have environmental authorizations for waste valorization and, at the same time, to carry out the recycling and waste recovery inventory in the Spanish cement plants.
The mastery of a current reference
Built between 1935 and 1941, the work of Arniches, Dominguez and Torroja, with its body lower of simple arches and its corbel of concrete that covers the grandstands, is a perfect combination between tradition and modernity, between the aesthetic and structural solutions.
Recently rehabilitated and declared Property of Cultural Interest in 2009, 75 years after its opening the “La Zarzuela” racecourse remains a benchmark for the architecture and engineering.
Precast external thermal insulation system for buildings with photocatalytic performance: ETIXc
ETIXc is a new compact thermal insulation system, designed as the totally precast constructive solution of light weight architectonic concrete panels, that is based on an Ultra High Performance Mortar (i.active EFFIX ARCA) with photocatalytic performance and a careful design of the manufacturing and mounting system for the most feasibility execution. The aesthetical of panels is guaranteed thanks both to the high quality of the finishing surfaces as the photocatalytic performance, this last contributes to a longer maintenance of cleaning, besides helping to improve the quality of the surrounding air.
Total refurbishment on Bailen Street´s viaduct in Madrid
Madrid City Council is carrying out maintenance activities and the refurbishment of all road structures in Madrid. Probably the most unique of these is the viaduct at Bailen Street, due to its location, dimensions and its full integration within the urban landscape of Madrid Villa.