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Construction and demolition waste

The generation of construction and demolition waste (RCD) is a problem of environmental pollution, representing more or less a third of the total waste produced in the European Union. Concrete recycling processes have been established to generate a more sustainable construction industry. Using recycled concrete is a safe way to reduce garbage dumps, and affordable mechanical grinding technology is available to achieve this, then sieved through No. 4 to separate small and large particles.  It has density and compaction properties that make it very useful for different applications. With recycling, it is possible to replace the raw material, reduce the environmental impact, decrease the exploitation of natural resources and lower transport costs, as it is treated on the same construction or demolition site. The material recovered from demolition sites have elements that must be separated before creating new concrete: Mortar and concrete-derived products. Natural ston... +info

The construction sector in Catalonia, 2020 forecasts

The CCOC calls for an investment effort that allows companies to be preserved and jobs to be created, prioritizing investments in infrastructure and equipment, based on the economic, social and environmental return. Construction is a sector with a high economic and social return, and that is becoming a key piece for the country’s economic recovery and the fight against climate change. The Recovery Plan envisaged by the European Union bets on public investment in construction and renewable energy, and also admits the increase in the public deficit. The immediate future impact of the pandemic caused by Covid-19, and the consequent economic and social crisis, is difficult to estimate, because traditional methods of economic forecasting don’t work in such high uncertainty environments. However investment in construction in Catalonia is expected to partially recover in 2021.... +info

Painting an industrial buildings

Industrial buildings must have clean walls, floors and ceilings, and that these surfaces do not produce dust and are easy to clean. Dirt is a very serious problem in buildings, since it causes them to deteriorate earlier, so they must be effectively protected. They must have a uniform appearance and therefore a paint coating must be applied both inside and outside. The first step is to find what type of paint is the most suitable for the pavement, walls and ceilings, according to the substrate being painted and what resistance the finish requires. The most used in industrial buildings are semi-gloss or glossy white paints, both alkyd resin and latex. Epoxy paints are also used, but they have a higher cost, since it is a most durable and resistant system. It is also important that on the surfaces that remain unpainted, use the appropriate primer. The color has to be taken into consideration, since if it is painted in dark tones it will require more layers, and if it ... +info

Construction of industrial warehouses

Industrial warehouses have large open spaces, to facilitate work without obstacles. To start the process of construction of an industrial warehouse, it is necessary to know which activity is going to be carried out, in order to follow the current legislation according to its use. It is also necessary to decide where it will be set, they are usually build in industrial areas, since there are lands prepared for this kind of use, with common services. The different types of warehouses can be classified depending on the materials that are going to be used for their construction: Metallic Structure Prefabricado concrete Concrete “in situ” Mixed The construction process is as follows : Land clearing Foundation Structure Enclosure Cover Regardless of the kind of warehouse, its construction is simple and fast, since almost all the elements are prefabricated.... +info

Steel in industrial construction

The first material used in practice for sustainable structures was iron and its alloys. One of the main advantages of the steel used in industrial construction is that it is 100% recyclable, becoming a sustainable element and with all the environmental guarantees. Due to its magnetic properties, it can be reused and relocated several times without losing any quality. It should also be noted that metal structures take up less space than the concrete ones, making the interior living area larger. Despite of it is a recyclable material, it is still manufactured nowadays, because steel demand is higher than the offer, but in Spain its possible recycle about ten and a half million tones. Improving energy efficiency in its manufacture, and thus reducing environmental pollution, transforming it into the greatest exponent of the circular economy. Another advantage of steel, and very important for the design of large gap structures, is that it has high mechanical resistance and is ver... +info

Measures to revive the economy from construction

To be able to revive the economy, it is necessary to give a priority and urgent support at the construction activity and to the related industries, as concrete. For that reason the “Asociación Nacional de Fabricantes de Hormigón Preparado” (ANEFHOP) has presented a program of measures to the Spanish Government, with the aim of stimulating both public and private work. The construction industry is key to the restoration of the economy, considering that it produces 5,2% of GDP and has a capacity to occupy 1,3 million of job positions. It is essential to promote the necessary conditions for the construction sector acts as the engine of the economy, as it has done on other occasions. And even more when tourism, which is the main GDP generator, has collapsed. To relaunch the activity, the  employers of the Association propose a program of measures, based on these 8 proposals :   Guarantee of access and supply of equipment and systems for health protection and the preven... +info

Energy efficiency with Polyurethane

Improving energy efficiency in construction is essential, to achieve the Horizon 2020 sustainability agreements. Thermal isolation is very important to get an optimal energy efficiency, this allows the final user can save in air conditioning and the emissions generated by heating and cooling systems are reduced. Polyurethanes are innovative, sustainable and very versatile, as they are very efficient and have numerous applications in construction and industry. The use of polyurethanes brings many benefits in buildings: Reinforces structures. Repairs cracks and fissures. Decreases the need for maintenance and rehabilitation. It is specially sustainable, since it normally exceeds the useful life of the building itself. Saving in raw material costs. It has a very low thermal conductivity. Reduces energy expenditure and emissions. Its lightness, minimizes the weight in structural loads and facilitates transport. Simple installation. Seals and waterproofs. Get... +info

COVID-19 Second release

We would like to inform you that Duinsa restarts its activity after the government imposed ban, keeping the same conditions as when we where in alarm status. Due to the health emergency situation we are living, our offices are still closed but we will continue to provide our services by teleworking. Our office hours are as usual, from Monday to Thursday : 08:00 to 13:00 and 14:45 to 18:00, and 08:00 to 15:00 on Fridays. Duinsa will maintain its activities, with the limitations this situation implies, however we will continue with the service to our customers and suppliers. For the moment we will keep on with the construction work, doing intensive working day from 7:00 am to 15 pm. During this period, and while we don’t have new indications of our Authorities, you can get in touch with us at the following e-mail: info@duinsa.es or via this telephone number: 93 846 68 19... +info

Sustainable buildings in 2030

According to ONU forecasts, in 2030 70% of global population will live in cities. With this high growing, energy demands in buildings will increase about 50% in 2026, and to guarantee the environmental sustainability some significant changes will be needed to reduce CO2 emissions. To reach Sustainable Development Goals, it is necessary to reduce the carbon footprint in the construction sector, implementing new energy and climate efficiency measures, improving the insulation of roofs, facades and windows. To reach the 30% of reduction target, buildings should improve their energy efficiency about 3% per year. Some of the goals to achieve it are the following: Increase sustainable and inclusive urbanization. Protect the world’s cultural and natural heritage. Decrease energy consumption of lighting and air conditioning. Reduce negative environmental impact per person in cities. Minimize the use of resources, degradation and pollution, to get a better quality of life.... +info

Processed concrete in construction

Processed concrete is one of the most used construction materials, it is versatile as it withstands different environmental conditions. Buildings over 100 meters high require highly resistant mixtures. At present, resistors of 800 and 900 kg/cm2 are used, but there is the need to develop even more resistant mixtures with more benefits, as customers require a more efficient workability to be able to put the mixture in the formworks. A concrete supplier company must have an ISO 9001 certificate, which implies monitoring of the quality procedures and must have the solution to any inconvenient. The optimization of concrete mixer productivity is also important, which is achieved by automating the equipment with a wifi communication system between truck and production plant. The system recognizes the truck and the production plant, adapting capacity and loading speed of that specific truck, making it much more efficient. Another way to gain in productivity is to manufacture a ligh... +info