Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Thermal Stress State of a Massive Concrete Slab in the Winter Building Period
https://orcid.org/http://orcid.org/0000-0003-2504-6606
https://orcid.org/http://orcid.org/0000-0002-3752-1219
https://orcid.org/http://orcid.org/0000-0002-4814-3938
https://orcid.org/http://orcid.org/0000-0002-7304-0674
In this paper, a problem of the thermal cracking resistance according to the deformation criterion of a massive concrete foundation slab during the building period in winter was considered. The implementation of tent and thermal insulation has been justified by preventing freezing of an early-age concrete and generation of significant tensile stresses. Optimum time limits for the thermal protection elements removal should be calculated considering the thermal stress state of the slab. The winter concreting of the foundation slab, 2.0 m high and measuring 21.8 m × 63.8 m in plan, at outside temperatures of −35 °C, −25 °C and −15 °C, was examined. In this paper, the thermal cracking resistance in this paper was estimated according to the deformation criterion, which means that concrete elongation deformations should not exceed the ultimate concrete elongation. The thermal cracking resistance analysis is based on a calculation of the thermal stressed state of the concrete foundation slab during the hardening period and is carried out in the TERM software taking into account the influence of the curing temperature on the concrete thermophysical and deformation properties. Safe time limits for the thermal insulation and the tent removal have been calculated. A linear dependence of the optimum time limits of the thermal protection elements removal on the outside air temperature has been revealed. The values of cooling rate at the set points located on the top and side surfaces of the slab at various outside air temperatures have been defined.
Thermal Stress State of a Massive Concrete Slab in the Winter Building Period
https://orcid.org/http://orcid.org/0000-0003-2504-6606
https://orcid.org/http://orcid.org/0000-0002-3752-1219
https://orcid.org/http://orcid.org/0000-0002-4814-3938
https://orcid.org/http://orcid.org/0000-0002-7304-0674
In this paper, a problem of the thermal cracking resistance according to the deformation criterion of a massive concrete foundation slab during the building period in winter was considered. The implementation of tent and thermal insulation has been justified by preventing freezing of an early-age concrete and generation of significant tensile stresses. Optimum time limits for the thermal protection elements removal should be calculated considering the thermal stress state of the slab. The winter concreting of the foundation slab, 2.0 m high and measuring 21.8 m × 63.8 m in plan, at outside temperatures of −35 °C, −25 °C and −15 °C, was examined. In this paper, the thermal cracking resistance in this paper was estimated according to the deformation criterion, which means that concrete elongation deformations should not exceed the ultimate concrete elongation. The thermal cracking resistance analysis is based on a calculation of the thermal stressed state of the concrete foundation slab during the hardening period and is carried out in the TERM software taking into account the influence of the curing temperature on the concrete thermophysical and deformation properties. Safe time limits for the thermal insulation and the tent removal have been calculated. A linear dependence of the optimum time limits of the thermal protection elements removal on the outside air temperature has been revealed. The values of cooling rate at the set points located on the top and side surfaces of the slab at various outside air temperatures have been defined.
Thermal Stress State of a Massive Concrete Slab in the Winter Building Period
https://orcid.org/http://orcid.org/0000-0003-2504-6606
https://orcid.org/http://orcid.org/0000-0002-3752-1219
https://orcid.org/http://orcid.org/0000-0002-4814-3938
https://orcid.org/http://orcid.org/0000-0002-7304-0674
In this paper, a problem of the thermal cracking resistance according to the deformation criterion of a massive concrete foundation slab during the building period in winter was considered. The implementation of tent and thermal insulation has been justified by preventing freezing of an early-age concrete and generation of significant tensile stresses. Optimum time limits for the thermal protection elements removal should be calculated considering the thermal stress state of the slab. The winter concreting of the foundation slab, 2.0 m high and measuring 21.8 m × 63.8 m in plan, at outside temperatures of −35 °C, −25 °C and −15 °C, was examined. In this paper, the thermal cracking resistance in this paper was estimated according to the deformation criterion, which means that concrete elongation deformations should not exceed the ultimate concrete elongation. The thermal cracking resistance analysis is based on a calculation of the thermal stressed state of the concrete foundation slab during the hardening period and is carried out in the TERM software taking into account the influence of the curing temperature on the concrete thermophysical and deformation properties. Safe time limits for the thermal insulation and the tent removal have been calculated. A linear dependence of the optimum time limits of the thermal protection elements removal on the outside air temperature has been revealed. The values of cooling rate at the set points located on the top and side surfaces of the slab at various outside air temperatures have been defined.
Thermal Stress State of a Massive Concrete Slab in the Winter Building Period
Lecture Notes in Civil Engineering
Vatin, Nikolai (Herausgeber:in) / Roshchina, Svetlana (Herausgeber:in) / Serdjuks, Dmitrijs (Herausgeber:in) / Tyapkina, Polina (Autor:in) / Semenov, Kirill (Autor:in) / Barabanshchikov, Yuri (Autor:in) / Lebedeva, Irina (Autor:in)
International Conference on Materials Physics, Building Structures & Technologies in Construction, Industrial and Production Engineering – MPCPE ; 2022 ; Vladimir, Russia
18.10.2023
12 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Massive concrete and reinforced concrete structures , Building period , Cement setting temperature , Thermal stressed state , Thermal cracking resistance , Cold weather concreting , Thermal protection elements , Thermal insulation Engineering , Building Construction and Design , Construction Management , Sustainable Development , Industrial and Production Engineering
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