Experimental and finite element investigations on hydration heat and early cracks in massive concrete piers

Sheng, Xingwang; Xiao, Shimiao; Zheng, Weiqi; Sun, Huanzhong; Yang, Ying‐Wei; Ma, Kun

doi:10.1016/j.cscm.2023.e01926

Cited by 9 publications

(5 citation statements)

References 15 publications

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“…Compared to the already mentioned MIDAS FEA, which is a software commonly used for the early crack resistance analysis of mass concrete providing the built-in parameters and formulas in the analysis, ABAQUS is found to be a more versatile finite element software that offers greater flexibility in parameter adjustments. When combined with detailed engineering data, ABAQUS allows for simulation results that closely approximate the real situation [148]. In the XFEM-based simulation conducted by Sheng et al [148], the temperature field of the massive structure was determined using the subroutine HETVAL in ABAQUS.…”

Section: Abaqusmentioning

confidence: 99%

“…When combined with detailed engineering data, ABAQUS allows for simulation results that closely approximate the real situation [148]. In the XFEM-based simulation conducted by Sheng et al [148], the temperature field of the massive structure was determined using the subroutine HETVAL in ABAQUS. Since the software does not allow for the calculation of the humidity field, the shrinkage strain was proposed to be calculated using the following equation:…”

Section: Abaqusmentioning

confidence: 99%

See 1 more Smart Citation

Modeling of Heat and Mass Transfer in Cement-Based Materials during Cement Hydration—A Review

Klemczak,

Smolana,

Jędrzejewska

2024

Energies

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Cement-based materials encompass a broad spectrum of construction materials that utilize cement as the primary binding agent. Among these materials, concrete stands out as the most commonly employed. The cement, which is the principal constituent of these materials, undergoes a hydration reaction with water, playing a crucial role in the formation of the hardened composite. However, the exothermic nature of this reaction leads to significant temperature rise within the concrete elements, particularly during the early stages of hardening and in structures of substantial thickness. This temperature rise underscores the critical importance of predictive modeling in this domain. This paper presents a review of modeling approaches designed to predict temperature and accompanying moisture fields during concrete hardening, examining different levels of modeling accuracy and essential input parameters. While modern commercial finite element method (FEM) software programs are available for simulating thermal and moisture fields in concrete, they are accompanied by inherent limitations that engineers must know. The authors further evaluate effective commercial software tools tailored for predicting these effects, intending to provide construction engineers and stakeholders with guidance on managing temperature and moisture impacts in early-age concrete.

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Section: Abaqusmentioning

confidence: 99%

Section: Abaqusmentioning

confidence: 99%

Modeling of Heat and Mass Transfer in Cement-Based Materials during Cement Hydration—A Review

Klemczak,

Smolana,

Jędrzejewska

2024

Energies

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“…As a stabilizer, the hydration heat of cement is mainly related to the characteristics of the cement itself [20]. Typically, many researchers use empirical formulas for the heat source function in hydration heat calculations [25].…”

Section: Hydration Heat Of Cementmentioning

confidence: 99%

“…By evaluating the possibility of using existing numerical models of mortar and concrete machinery on wood-based cementitious composites, Ndong Engone et al [16] identified the parameters that have to be adjusted in the models. In foreign countries, some new technologies have emerged, such as adding modifiers to enhance solidification effects and utilizing detection systems for construction monitoring [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Research on Temperature Field of Cement-Mixing Pile-Reinforced Soft Soil Foundation

Wang,

Xu,

et al. 2024

Buildings

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To investigate the mechanism of reinforcing soft soil with cement-mixing pile, based on ABAQUS secondary development, a numerical simulation study of the hydration reaction of cement-mixing piles was conducted. In this study, the influence of ground temperature variations on the distribution patterns of the temperature field in and around the pile was also considered. The temperature field of the pile–soil model can be primarily divided into two stages: the temperature rise stage (0~5 d) and the temperature decrease stage (5~90 d). The following observations were made: (1) The temperature of the pile body rapidly increased within the first 5 days, dissipating heat to the surrounding soil, leading to an elevation of the temperature in the soil around the pile and a decrease in soil moisture content. Around the 5th day, the temperature reached its maximum value, and the heat release rate of the pile body was higher than that of the surrounding soil. (2) With a 15% cement admixture, under the influence of 425# cement hydration, the temperature inside the pile increased by 5 °C, and the temperature in the soil around the pile increased by 4.2 °C. After considering the ground temperature, the temperature in the soil around the pile increased by 4.6 °C. (3) The maximum temperature generated during the hydration of 425# Portland cement is higher than that of 525#; the temperature of the soil around piles made with 425# cement is consistently higher than that made with 525#. (4) The hydration temperature of piles with a 10% cement admixture increased by 4.4 °C; for piles with a 15% cement admixture, the hydration temperature increased by 6.6 °C; and for piles with a 20% cement admixture, the hydration temperature increased by 9.1 °C. The temperature field of this structure gradually stabilizes after 7 days with increasing time and cement admixture. The results indicate that the hydration of cement-mixing piles raises the temperature of the soil around the piles. Additionally, the temperature resulting from the hydration of cement-mixing pile increases with the addition of cement.

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“…Therefore, conducting simulation studies on the temperature and stress field of concrete structures during the early-age phase is of paramount practical significance to prevent temperature-related cracking. Many scholars have made significant progress in various aspects such as cement types [3][4][5], concrete mix proportions [6][7][8], admixtures [3,[9][10][11][12][13], cooling pipe design [3,[14][15][16], curing methods [17][18][19], and finite element model optimization [20,21]. Regarding concrete mix proportions, Barbara, Yunus, and others [22,23] proposed that reducing cement content is an effective method to maintain lower concrete temperatures.…”

Section: Introductionmentioning

confidence: 99%

Relationship between Ambient Temperature and Reasonable Heat Dissipation Coefficient of Mass Concrete Pouring Blocks

Zhang,

Zhao

et al. 2024

Materials

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In engineering practice, similar surface insulation measures are typically applied to different parts of mass concrete surfaces. However, this can lead to cracking at the edges of the concrete surface or the wastage of insulation materials. In comparison to flat surfaces, the edges of mass concrete structures dissipate heat more rapidly, leading to more pronounced stress concentration phenomena. Therefore, reinforced insulation measures are necessary. To reduce energy consumption and enhance overall insulation effectiveness, it is essential to study the specific insulation requirements of both the flat surfaces and edges of concrete separately and implement targeted surface insulation measures. Taking the bridge abutment planned for pouring in Nanjing City as the research object, this study established a finite element model to explore the effects of different ambient temperatures and different surface heat dissipation coefficients on the early-age temperature and stress fields of different parts of the abutment’s surface. Based on simulation results, reasonable heat dissipation coefficients that meet the requirements for crack prevention on both the structure’s plane and edges under different ambient temperatures were obtained. The results indicate that under the same conditions, the reasonable heat dissipation coefficient at the edges was smaller than that on the flat surfaces, indicating the need for stronger insulation measures at the edges. Finally, mathematical models correlating ambient temperature with reasonable heat dissipation coefficients for the structure’s plane and edges at these temperatures were established, with high data correlation and determination coefficients (R2) of 0.95 and 0.92. The mathematical models were validated, and the results from finite element calculations were found to be consistent with those from the mathematical models, validating the accuracy of the mathematical models. The conclusions drawn can provide references for the insulation of similar engineering concrete planes and edges.

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Experimental and finite element investigations on hydration heat and early cracks in massive concrete piers

Cited by 9 publications

References 15 publications

Modeling of Heat and Mass Transfer in Cement-Based Materials during Cement Hydration—A Review

Modeling of Heat and Mass Transfer in Cement-Based Materials during Cement Hydration—A Review

Research on Temperature Field of Cement-Mixing Pile-Reinforced Soft Soil Foundation

Relationship between Ambient Temperature and Reasonable Heat Dissipation Coefficient of Mass Concrete Pouring Blocks

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