Библиотека на Университет по архитектура, строителство и геодезия

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The use of Green Concrete in Germany to Conserve Resources and the Opportunities for Decarbonization Along Its Value Chain

Annika Schugt; Silvia Weber
The use of Green Concrete in Germany to Conserve Resources and the Opportunities for Decarbonization Along Its Value Chain
ЦБ II 544

Детайли

Източник
Годишник на Университета по архитектура, строителство и геодезия - УАСГ
Издателство
УАСГ
Местоиздаване
София
Година на издаване
2023
Пор.№
бр. 3.
Страници
с. 1243 - 1262
Том
56
Ключови думи
resource-saving concrete, decarbonization, CO2, reduction, recycled aggregates,, crushed sand
ISSN
1310-814X
Отрасъл
Общ отдел. Наука. Библ. дело. Енциклопедии
Забележка
Т. 56. Бр. 3. Международна юбилейна научна конференция "80 години УАСГ".
Анотация
"The building industry is particularly resource-intensive and the urgency to produce concrete in a resource-conserving way is an imperative of the time. Around 40 % of Germany's greenhouse gases are attributable to construction and the use of buildings. These days about 78 % of construction waste is recycled, but due to the existing restrictions in Germany only 12,5 % of the demand for aggregate in concrete is covered by recycled aggregate, so the remaining material loses its value and is removed from the material life-cycle. The paper presents the results of a testing program and show how, in order to drive decarbonization of concrete, the concrete matrix can be optimized by a significantly expand of the possibilities of using recycled aggregates, as for example replacing natural sand by crushed sands, what currently is not permitted by German Standards. However, the main potential for saving CO2 lays in the cement, which is responsible for approximately 93 % of the greenhouse potential of concrete. To reduce the CO2 emission of concrete significantly a lower clinker content is demanded and a low clinker-cement factor should be aimed for. Other ways to decarbonize include optimizing the fuel matrix, using alternative raw materials, or carbon capture technologies."
Системен №
5212

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