Evaluation of heat of hydration, temperature evolution and thermal cracking risk in high-strength concrete at early ages

Do, Tu Anh; Hoang, Tuyet Thi; Bui-Tien, Thanh; Hoang, Hai Viet; Duc, Tuan; Nguyen, Phan Anh

doi:10.1016/j.csite.2020.100658

Cited by 23 publications

(3 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The expansion and shrinkage caused by the thermal changes can strongly influence the stress distribution of the mass concrete structures (Huang et al, 2018;Do et al, 2020). According to Zhu's research (Zhu, 2013), the exponential function is adopted to calculate the hydration heat.…”

Section: The Hydration Heat Analysismentioning

confidence: 99%

Mechanical Behavior of the Novel Gradient Concrete Tower of a Cable-Stayed Bridge

et al. 2021

View full text Add to dashboard Cite

In this paper, the novel gradient concrete is innovatively applied to the bridge towers of Chizhou Yangtze River Bridge to solve the cracking and insufficient durability problems of concrete towers. Fiber-reinforced concrete is used in the outer functional area of the bridge tower, to significantly improve its crack resistance during construction and service. Moreover, the integrated design of anti-cracking and mechanical properties of tower materials is achieved. To study the performance of the novel functional gradient concrete (FGC) tower, the mechanical properties of the FGC tower material are tested, and the overall finite element stress is analyzed. Based on the material properties, the mechanical behavior of the cable-stayed bridge tower is studied. The temperature and stress of the FGC tower during the generation of the hydration heat are compared with that of the ordinary concrete tower. The crack resistance of the FGC tower is analyzed by the finite element method. The results show that the FGC tower has good mechanical properties and durability for the cable-stayed bridge towers.

show abstract

Section: The Hydration Heat Analysismentioning

confidence: 99%

Mechanical Behavior of the Novel Gradient Concrete Tower of a Cable-Stayed Bridge

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The rate of heat liberated from cement hydration depends on the temperature of the concrete element itself. The heat rate can be experimentally determined using isothermal [10,15], adiabatic [16,17], or semi-adiabatic calorimetry [4]. The experimental adiabatic temperature rise (ATR) can be converted into a maturitybased heat rate as presented by Ballim and Graham [18], in which the total heat (Q) liberated at any time (t) is firstly computed from the ATR using the following relationship:…”

Section: Rate Of Hydration Heatmentioning

confidence: 99%

A Combination of Finite Difference and Finite Element Methods for Temperature and Stress Predictions of Early-Age Concrete Members

Do¹

2021

Finite Element Methods and Their Applications

View full text Add to dashboard Cite

A combination of finite difference and finite element methods was employed to develop a model for predicting the temperature development and thermally induced stresses in early-age concrete members (such as bridge footings, piers, columns, girders, and slabs). A two-dimensional finite difference (FD) scheme was utilized for heat generation and transfer within a hydrating concrete member. A finite element (FE) plane strain model was then established to compute the thermal stresses in the concrete subjected to the temperature changes. The FD-FE model can be easily created using any programing language, and the methodology can be used to predict the temperatures and stresses as well as assess the possibility of early-age cracking in concrete members.

show abstract

“…The early-age thermal-shrinkage effects prompt cracks that can be observed in the first days after casting. This cracking is a big problem when the crack width exceeds the critical value, which reduces the durability and usability of the structure [2][3][4][5][6][7][8]. Moreover, after the end of concrete hardening, the cracking caused by volume changes due to changes in temperature and moisture during the hardening process and may also develop as a result of the temperature changes (daytime and seasonally), then concrete continues to shrink and at the same time be subjected to mechanical loads.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of methods for analyzing early-age cracking risk in concrete walls of tunnel structures

Minh

Thac

et al. 2020

View full text Add to dashboard Cite

This paper is concentrated on investigating the modern methods to evaluate the probability of cracking in urban tunnel structures during construction. The study considers the current standard methods for assessing reinforced concrete walls of an urban tunnel, which experienced early-age cracking. The results obtained using guidelines were compared with actual observations of crack widths in the urban tunnel wall. Examples of using specifications in wall design were also described. The proper method is highlighted with suggestions for a possible path for considering early-age thermal and shrinkage effects in urban reinforced concrete tunnel walls

show abstract

Evaluation of heat of hydration, temperature evolution and thermal cracking risk in high-strength concrete at early ages

Cited by 23 publications

References 12 publications

Mechanical Behavior of the Novel Gradient Concrete Tower of a Cable-Stayed Bridge

Mechanical Behavior of the Novel Gradient Concrete Tower of a Cable-Stayed Bridge

A Combination of Finite Difference and Finite Element Methods for Temperature and Stress Predictions of Early-Age Concrete Members

Evaluation of methods for analyzing early-age cracking risk in concrete walls of tunnel structures

Contact Info

Product

Resources

About