The aggregate sector as a key actor in the circular economy
The European Commission has developed a series of measures to boost the circular economy that refers to the different elements as a "strategic response to the new reality of globalization and to the amount of pressure received regarding the natural resources which are poor and limited”.
This initiative has confirmed something that for many years the UEPG, the FdA and ANEFA were commenting; the firm and determined will of the European institutions and the States Member to promote the recycling and recovery of waste in order to minimize the consumption of "new raw materials" reducing landfill waste to a minimum.
This concept is quite new in the world, however, has an unstoppable route that will have very important consequences in the economic model of the aggregate sector and eventually will probably get implanted in all countries of the world. Communication applies the concepts of the circular economy to the aggregate sector and studies its repercussions on it.
Clinker optical microscopy
For the manufacture of high quality portland cement several analytical techniques are necessary to guarantee compliance with the required performance of the product in its final use.
The use of clinker microscopy as one of these techniques is an extra tool that brings to us the direct observation of the mineralogy that constitutes this hydraulic conglomerate. This fact gives the possibility of studying the minerals that will form the cement in a unique way that, in addition to the rest of techniques, will help to overcome some challenges that arise during the manufacture of portland cement of modern cements, from the preparation of the raw meal to the clinkerization control.
Clinker mineralogy, widely used before the emergence of more modern techniques such as X-ray diffraction (XRD) to control the manufacturing process, is helping today to face new challenges in the cement industry as the change of the traditional fuels for alternative fuels and the development of cements of greater added value.
Cooler replacement goes hand in hand with complete pyro upgrade
For a pyoprocessing line upgrade, clinker coolers are often the main focus, however a more comprehensive package should be offered.
Product development and innovation are DAL’s main priorities in order to serve the cement industry. Our most recent release at Nuh Cement Plant is part of DAL -Filter-to-Filter Pyro-Process Concept- which covers the following production units: kiln/VRM de-dusting, raw meal transport and homogenization silo, gas conditioning tower, pre-heater, clinker cooler, rotary kiln and cooler de-dusting unit.
GAMBAROTTA-GSCHWENDT, the power of experience
GAMBAROTTA-GSCHWENDT is a world leader in the manufacture of equipment for the handling of solid materials in bulk and offers transport solutions for all types of sectors.
Air cannons in the cement industry
During the last few years, the cement industry in Spain has adapted to changing economic conditions in order to remain competitive in the market both nationally and internationally. New equipment and process techniques in the production of clinker have brought benefits and new challenges as a result of the continuous research and development to refine existing technical solutions and engineer new designs to meet the industry’s evolving needs.
Air cannons are essential in cement manufacturing to ensure the consistent flow of bulk material in various parts of the process. The need to optimize processes for economic and energy efficiency requires solutions that minimize operating costs and improve the technical performance of the equipment. Martin Engineering has worked on several fronts to be able to solve these new challenges, expanding its product portfolio with new technologies that achieve high efficiency while diminishing risk to operators and maintenance personnel, minimizing air consumption and facilitating maintenance.
Cement Design, innovation for the surface
Present in more than 40 countries, Cement Design is a leading brand in the manufacture, distribution and installation of high decoration continuous coatings based on cement. With its six collections (Eco Cement, Nature, Textil, Metallic, Stone and Glass) and its latest innovations (Porocret, Cement Roll and Panelcret) it has more than a hundred products, as many textures, a chart of more than 120 customizable colors and a wide range of finishes and aggregates.
Statistical analysis of the study of the permeability in concrete with plasticizing admixtures
The nanosilicate additive gives different properties to the concrete such as increased impermeability, workability and strength; however, there are not a guidelines or research studies that refer specifically to their dosage limits and their action levels in buildings. For this reason, this study was generated with tests of concrete in fresh state (slump, air content, density) and hardened state (permeability, strength, retraction and ultrasound); doing dosages from 35 MPa to 28 days with 15 cm of slump, using different amounts of nanosilica and HE cement. An increase in impermeability was obtained with additions of 2.5%, also with an increase in resistance by 14% with respect to the standard concrete and improvements in densification; but not being in the same way in the addition of 5% since even though there is a greater amount of nanosilica there was not a proportional increase in the mechanical properties with respect to the amount of nanosilicate used. A correlation between 3 variables was generated using permeability as dependent and an equation was established; showing that the additive remarkably increases the density of the concrete improving its impermeability and resistance.
Tunnel formwork, a global view
The article is about the various types of formwork systems that we can find in the production of concrete linings for tunnels; both in the open air, known as “cut and cover tunnels”, and in mines. It is clear that it is not an exhaustive review through the state of art in this subject because it will need more space; as the title says, it is a global view that tries to explain it from the experience and the technique, not from the theory. A classification is made by types of formwork, which is not unique, but the most logical because of its simplicity. The parts of the system are explained in each type; how the efforts generated by the concreting are transmitted and how the system works. We will go into some notes on the design and calculation in order to finish with possible reuse in different jobs of the same tunnel formwork system. A final conclusion closes the article.
Information Campaign on good practices for the safe handling of alternative fuels in cement factories
Fundación CEMA, in collaboration with SGS, has developed the Information Campaign on good practices for the safe handling of alternative fuels in cement factories, financed by the Fundación Estatal para la Prevención de Riesgos Laborales F.S.P. (AS2017-0010), has as main objective to make workers aware of the risks related to the use and handling of waste derived fuels. As many of the residues are totally or partially biomass, the risks of biological origin are emphasized.
During the project, a series of tools have been developed: a practical guide for the safe handling of alternative fuels; an informative leaflet; five information sheet for the most used alternative fuel typologies, as well as a training of trainers course, which has allowed the development of training cascade plan.
All the materials of the Campaign are available on the Fundacion CEMA website: www.fundacioncema.org
Aesthetics, energy efficiency and industrial manufacturing in concrete buildings
The facade, envelope or skin is the first image that we associate with a building, so that the architect always seeks that it has a unique and singular image.
At the same time, the facade is the main barrier that separates the outer changing environmental conditions from the inner environment of the building. In consequence, it must guarantee the simultaneous fulfillment of acoustic insulation, waterproofing, fire resistance or energy efficiency, as well as being durable. Concrete, as a massive material with many different applications, possibly offers the optimal basis to fulfill all these functions, while presenting unlimited aesthetic possibilities.
This article analyzes how architectural concrete facades and their industrial manufactures are facing the current challenges: the sustainability of construction, energy efficiency in buildings and the aesthetic requirements of an increasingly ambitious architecture.