The use of ice to cool the concrete mix in the construction of massive structures

Aniskin, N. A.; Nguyen, Truong An; Bui, Anh Kiet

doi:10.1051/e3sconf/202126402047

Cited by 4 publications

(1 citation statement)

References 15 publications

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“…Hardening of massive concrete and reinforced concrete structures is accompanied by a larger amount of heat liberation due to the exothermic reaction of cement hydration. As a result of non-uniform cooling of the structure, the thermal cracks may develop [1][2][3][4][5][6][7]. Such fractures are unacceptable in crack resistant constructions.…”

Section: Introductionmentioning

confidence: 99%

Stiffness Characteristics of the Ground Base and Thermal Stress State of Massive Concrete Slabs During the Construction Period

IVANOV,

SEMENOV,

Manovitskiy

et al. 2023

ЭТП

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Thermal stressed state of massive concrete and reinforced concrete structures during the building period is characterized by the risk of large tensile stresses that can lead to the temperature cracks and affect the whole structure integrity. For the crack resistant constructions, such defects are unacceptable. The concrete hardening process is accompanied by a large amount of heat release due to the cement hydration reaction. The most dangerous cases are those, which cause the nonuniform temperature distribution over the body of the block. Significant gradients can lead to stresses exceeding the stresses from operational loads. On top of that, there are factors also affecting the thermal stress state such as ambient temperature fluctuations, solar radiation, the block cooling velocity, initial and boundary conditions, the stiffness of the basement. The last factor is the subject of research reflected in the current work. The article found that ignoring the ground base deformation characteristics may lead to a significant crack resistance overestimation during the design of concrete curing measures. By the calculation, the direct dependence between concrete cracking in the foundation slab and the basement stiffness was revealed: the larger stiffness, the more intensive crack propagation. It is shown that the influence degree depends on the construction thickness: there is the decrease of sensitivity with the larger block thickness, when the thing concreting block is more susceptible to this effect.

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Section: Introductionmentioning

confidence: 99%

Stiffness Characteristics of the Ground Base and Thermal Stress State of Massive Concrete Slabs During the Construction Period

IVANOV,

SEMENOV,

Manovitskiy

et al. 2023

ЭТП

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show abstract

Calculation of thermal state stress of the wind turbine’s foundation slab for the improvement of the quality and crack resistance

Semenov,

Pavlova,

Ternovskii

et al. 2023

E3S Web of Conf.

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The thermal stress state of massive concrete and reinforced concrete structures during the construction period is characterized by the risk of large tensile stresses and, as a result, temperature cracks that violate the integrity of the structure. These defects are unacceptable for crack-resistant structures. The process of concrete hardening is accompanied by the release of a large amount of heat as a result of the hydration reaction of cement. The most dangerous cases are with uneven temperature distribution within the block body. Significant gradients can lead to stresses that exceed the stresses from operational loads. The thermal stress state is also influenced by temperature fluctuations of the surrounding environment, solar radiation, cooling rate of the block, initial and boundary conditions, and the possible cutting of a massive structure into separate concrete blocks. The latter factor is the subject of the research reflected in this study. The article establishes that, despite the possible increase in the construction time cutting the foundation plates into separate blocks by height can make the thermal stress state of the plate significantly more favorable in terms of ensuring crack resistance. In some cases, cutting can be such a successful method of combating temperature cracks that it will allow for the abandonment of special thermal insulation on the surface of the structure. The study shows the effectiveness of the cutting method depending on the number of blocks for the improvement of foundation slab quality.

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Study the properties of concrete using fly ash, sea sand, with fiberglass reinforcement

Hoang¹,

Nguyen²

2023

AIP Conference Proceedings

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The use of ice to cool the concrete mix in the construction of massive structures

Cited by 4 publications

References 15 publications

Stiffness Characteristics of the Ground Base and Thermal Stress State of Massive Concrete Slabs During the Construction Period

Stiffness Characteristics of the Ground Base and Thermal Stress State of Massive Concrete Slabs During the Construction Period

Calculation of thermal state stress of the wind turbine’s foundation slab for the improvement of the quality and crack resistance

Study the properties of concrete using fly ash, sea sand, with fiberglass reinforcement

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