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Researchers develop a concrete UPCT 30% less dense ideal for seismic zones (26/09/2016)

Researchers at the research group of Advanced Science and Technology Building (CTAC) led by the director of the School of Architecture and Building Engineering at the Polytechnic University of Cartagena (UPCT) Carlos Parra, have developed a research company Cementos the Cruz SL and SL Hormicruz collaboration, which have developed a lightweight structural concrete with 30% less density compared to conventional, and high resistance.

These concretes are ideal, as those responsible for research, for seismic areas by reducing inertia and overloads that can damage buildings in earthquakes.

This has been used as lightweight aggregates different wastes such as plastic greenhouse, cork waste packaging industry or shredded tires.

In order to develop this product and evaluates the possibility of using industrial waste (plastic or paper) and nanomolecules silica for the manufacture of ultra lightweight concrete so that it meets the standards of strength and durability required in the regulations associated to these products.

The research project arises from the environmental problems derived from the production, storage and generation in large daily amounts of industrial waste.

reuse any of these resource recycled concrete manufacture high strength and light "Eco_hormigón ultra_Ligero (EcoHul)" is proposed.

The main advantages of this new material are its low density, making it ideal for use in seismic areas, high water resistance, and reduced cement when using active additions.

During the investigation they have been followed several phases to deepen the understanding and implementation in laboratory and industrial implementation of high-strength concrete and light structural use, while more respectful to the environment.

To do this, we designed and planned an extensive campaign experience based on three main axes for innovation in the field of recycled concrete structural lighter and more environmentally friendly.

The first axis was to replace part of the cement by active addiction, most of them obtained as residues of other industrial processes, to reduce the amount of clinker, the main component of cement, recycled concrete used in high strength.

On the other hand, the second axis intended to replace part of the aggregates extracted from natural limestone quarries artificial light recycled aggregates obtained as recycling of other industrial processes.

This second axis, in addition to direct environmental implications producing significantly reduces the density of concrete.

Thus, future concrete structures reduce their own weight or loads with very positive implications for economic savings and material in that aim, inter alia, of less than steel reinforcements.

In addition, reduction of the structures own weight reduces the load and inertia generated in earthquakes, which benefits the life of the structure and allows to use less steel reinforcements.

Finally, the third axis is the combination of previously acquired knowledge and optimize the benefits that each brings to the final replacement concrete.

Source: UPCT

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