Assessment of curing schemes for effectively controlling thermal behavior of mass concrete foundation at early ages

2020 ◽  
Vol 230 ◽  
pp. 117004 ◽  
Author(s):  
Sangyoung Han
Keyword(s):  
Thermal Behavior ◽  
Mass Concrete ◽  
Concrete Foundation

Influence of Casting Temperature on the Heat of Hydration in Mass Concrete Foundation with Ternary Cements

2014 ◽  
Vol 525 ◽  
pp. 478-481 ◽  
Author(s):  
Mi Hwa Lee ◽  
Young Seok Chae ◽  
Bae Su Khil ◽  
Hyun Do Yun
Keyword(s):  
Temperature Rise ◽  
Heat Of Hydration ◽  
Adiabatic Temperature ◽  
Casting Temperature ◽  
Mass Concrete ◽  
External Temperature ◽  
Maximum Heat ◽  
Adiabatic Temperature Rise ◽  
Concrete Foundation ◽  
Mat Foundation

This study is conducted to evaluate analytically the effect of casting temperature on the heat of hydration in mass concrete foundation with ternary cements and Type IV low heat cement. The mat foundation has the dimension of 15m length, 20m width and 3m depth. Casting temperatures considered for mat foundation consist of 10, 20 and 30C ̊. A commercial software MIDAS/Gen was used to analyze the hydration heat of mass concrete foundation. The maximum adiabatic temperature rise (K), and the coefficient of temperature rise˰˸α˹˰for thermal analysis were drawn from adiabatic temperature rise test. Analytical results show that blended cement PSLB_352 is the most effective to control the heat of hydration in mass concrete foundation and external temperature increases the maximum heat of hydration and crack probability of mat foundation with mass concrete.

scholarly journals Causes of Early-Age Thermal Cracking of Concrete Foundation Slabs and their Reinforcement to Control the Cracking

2017 ◽  
Vol 25 (3) ◽  
pp. 8-14 ◽  
Author(s):  
Juraj Bilčík ◽  
Róbert Sonnenschein ◽  
Natália Gažovičová
Keyword(s):  
Environmental Impact ◽  
Thermal Cracking ◽  
Effect Of Temperature ◽  
Early Age ◽  
Mass Concrete ◽  
Volume Changes ◽  
Interaction Models ◽  
Concrete Foundation ◽  
Temperature Loads ◽  
Crack Widths

Abstract This paper focuses on the causes and consequences of early-age cracking of mass concrete foundation slabs due to restrained volume changes. Considering the importance of water leaking through cracks in terms of the serviceability, durability and environmental impact of watertight concrete structures, emphasis is placed on the effect of temperature loads on foundation slabs. Foundation slabs are usually restrained to some degree externally or internally. To evaluate the effect of external restraints on foundation slabs, friction and interaction models are introduced. The reinforcement of concrete cannot prevent the initiation of cracking, but when cracking has occurred, it may act to reduce the spacing and width of cracks. According to EN 1992-1-1, results of calculating crack widths with local variations included in National Annexes (NAs) vary considerably. A comparison of the required reinforcement areas according to different NAs is presented.

scholarly journals Predicting thermal performance of a mass concrete foundation – A field monitoring case study

2019 ◽  
Vol 11 ◽  
pp. e00289 ◽  
Author(s):  
Yogiraj Sargam ◽  
Mahmoud Faytarouni ◽  
Kyle Riding ◽  
Kejin Wang ◽  
Charles Jahren ◽  
...  
Keyword(s):  
Thermal Performance ◽  
Field Monitoring ◽  
Mass Concrete ◽  
Concrete Foundation

Research on Crack Prevention Method for Long Concrete Foundation Slab of Pumping Station

2013 ◽  
Vol 427-429 ◽  
pp. 104-107
Author(s):  
Sheng Qiang ◽  
Nan Nan Zhang ◽  
Chao Wu ◽  
Yong He
Keyword(s):  
Temperature Control ◽  
Hydraulic Structure ◽  
Mass Concrete ◽  
Pouring Temperature ◽  
Simulation Research ◽  
Foundation Slab ◽  
Pumping Station ◽  
Concrete Foundation ◽  
Different Seasons ◽  
Prevention Method

The foundation slab is the key structure of a pumping station. For such a hydraulic structure cracking is not permitted because it will cause heavily seepage and other disaster. Temperature control is an important way to prevent cracking. With the aid of finite element method for temperature field and stress field simulation, research is carried out for a 43.5m long mass concrete foundation slab of a pumping station poured in different seasons. Different measures, such as pipe cooling, surface preservation and pouring temperature control, are tried to control the temperature and stress. This research gets some useful results, and the measures proposed have a significant reference to similar projects.

Thermal Characteristics of Mat Foundation with Different Lift Thickness of Mass Concrete Including Strontium-Based Latent Heat Binder

2014 ◽  
Vol 525 ◽  
pp. 461-464
Author(s):  
Kyung Lim Ahn ◽  
Qi Bo Liang ◽  
Bae Su Khil ◽  
Hyun Do Yun
Keyword(s):  
Latent Heat ◽  
Temperature Rise ◽  
Volume Fraction ◽  
Heat Of Hydration ◽  
Adiabatic Temperature ◽  
Hydration Heat ◽  
Mass Concrete ◽  
Adiabatic Temperature Rise ◽  
Concrete Foundation ◽  
Mat Foundation

This study provides analytical results for heat of hydration in the mat foundation with mass concretes to investigate the effect of lift thickness in the mat foundation on the hydration heat and crack characteristics of mat foundation with mass concrete. Mass concretes were mixed with ternary cement with 1% strontium-based latent heat binder at volume fraction and Type IV low heat cement. The mat foundation has the dimension of 15m length, 20m width and 3m depth. Lift thickness of mass concrete for mat foundation was varied from 1.0m to 3.0m. A commercial software MIDAS/Gen was used to analyze the hydration heat of mass concrete foundation. The maximum adiabatic temperature rise (K), and the coefficient of temperature rise (α) for thermal analysis were drawn from adiabatic temperature rise test. Based on the results of the finite element analysis for mat foundation with different lift thickness, the highest internal temperature and thermal stress increased with increasing with lift thickness of foundation. However, for foundation constructed with premixed strontium based latent heat binder (PSLB) concrete, this phenomenon was less remarkable compared to mass concrete foundation made with low heat cement.

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