H2020Индивидуална стипендия2018–2020

GEOHEAL · Self-healing geological construction materials and structures

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2018-01-22 → 2020-01-21
Финансиране от ЕС: 183 455 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Биологични механизми с бактерии се изследват за автоматично поправяне на повреди в естествен камък чрез отделяне на минерали като калцит. Това помага за удължаване на живота на сградите и намаляване на разходите за поддръжка на културното наследство.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Self-healing geological construction materials and structures

Natural stone is one of the most widely used geological construction materials. Although stone masonry structures have the potential to survive over centuries, they may be subject to significant damage and deterioration. Various conservation treatments have been explored for modifying the characteristics of stone, often in the layer closer to the surface. However, treatments may limit the breathability of the material triggering further damage. Microbially induced carbonate precipitation by bacteria is a promising breathable alternative for the protection of building stone from deterioration. The mineralogical composition and pore structure of most stone types used in construction are favourable for the growth of bacterial communities. However, the protection layer will deteriorate in the same manner as the host material, and although it will give enhanced protection of the stone, it is not infinitely durable. By giving this microbiological protection system the ability to ‘self-heal’ (i.e. respond automatically to heal damage and deterioration, without human intervention), it has the potential to considerably extend the durability of masonry protection. During the GEOHEAL project, our objectives focused on the development, application and assessment of biological healing and self-healing mechanisms for repairing and preventing damage in cementless construction materials, such as natural stone. The direct compatibility of the biological healing products, such as calcite, with stone materials, enables their application in heritage conservation, and significant reduction of maintenance costs in both existing and new structures. There is the potential for other minerals to act in a similar way, and which may be more durable (e.g. oxalates).

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

Geological materials are used in significant quantities for construction purposes, structurally and for cladding, but are subject to damage, deformation and deterioration through natural weathering processes in combination with the stress state induced in service. As a consequence, structural performance can be reduced, durability is compromised and there may be aesthetic or heritage issues with regard to preservation of the original structural form. Currently, such issues are addressed either through initial overdesign, implementation of maintenance programmes, or both. The proposal seeks to explore the potential for providing such materials with the ability to self-heal – to automatically respond to damage or deterioration, instigating a healing process that restores or even enhances the desirable structural or aesthetic properties. Such technology will take inspiration from, and work in parallel with, current research into self-healing in cementitious, polymeric and other engineering materials. Previously, biological methods of treatment of geological materials have been employed, e.g. cementation through bacterial mineralisation of calcite, to enhance structural properties as well as to protect and conserve valuable structures. Similar technologies have been employed in the self-healing of cementitious materials. It is therefore envisaged, for the first time, to introduce the concept of biological self-healing to geological materials, combining the Fellow's expertise in geo-material conservation with that of the Host in self-healing materials and biomineralisation. A major part of this work is to identify and assess suitable healing mechanisms, and methods of triggering them, for the particular environments under consideration. Ultimately it is hoped that the technology would be applicable to both new and existing engineered structures comprising geological materials.

Оригинален текст от CORDIS (на английски).

Участници

CARDIFF UNIVERSITY · CARDIFFКоординаторОбединеното кралство