Thermal effect and optimal design of cooling pipes on mass concrete with constant quantity of water flow

2020 ◽  
Vol 78 (11) ◽  
pp. 619-635
Author(s):  
Yongxing Hong ◽  
Ji Lin ◽  
Kambiz Vafai
Keyword(s):  
Optimal Design ◽  
Thermal Effect ◽  
Water Flow ◽  
Mass Concrete ◽  
Constant Quantity ◽  
Cooling Pipes

scholarly journals A faster iterative method for solving temperature field of mass concrete with cooling pipes

2017 ◽  
Author(s):  
Keshi You ◽  
Feng Wang ◽  
Liujiang Wang ◽  
Zhongwei Zhao ◽  
Yun Liu
Keyword(s):  
Temperature Field ◽  
Iterative Method ◽  
Mass Concrete ◽  
Cooling Pipes

scholarly journals Thermal effect of mass concrete structures in the tropics: Experimental, modelling and parametric studies

2017 ◽  
Vol 4 (1) ◽  
pp. 1278297 ◽  
Author(s):  
Herbert Abeka ◽  
Stephen Agyeman ◽  
Mark Adom-Asamoah ◽  
Raja Rizwan Hussain
Keyword(s):  
Thermal Effect ◽  
Concrete Structures ◽  
Mass Concrete ◽  
Experimental Modelling ◽  
Parametric Studies ◽  
The Tropics

A Study of the Preparation and Properties of the Concrete for the Bearing Platform of the Xiamen-Zhangzhou Sea-Spanning Bridge

2013 ◽  
Vol 357-360 ◽  
pp. 659-666
Author(s):  
Hong Mei Hu ◽  
Hao Wang ◽  
Rong Gui Du ◽  
Bo Shen Zheng ◽  
Yun Kun Yi ◽  
...  
Keyword(s):  
Fly Ash ◽  
Optimal Design ◽  
Environmental Conditions ◽  
High Performance ◽  
High Performance Concrete ◽  
Chloride Diffusion ◽  
Mass Concrete ◽  
Concrete Mix ◽  
Marine Concrete ◽  
Main Bridge

In light of the requirement of mass concrete for the bearing platform of the main tower of the Beicha Main Bridge of the Xiamen-Zhangzhou Sea-spanning Bridge, and in view of the hostile environmental conditions for the project, a study was conducted on the technology of preparing high-performance marine concrete for the bearing platform of the sea-spanning bridge in order to control concrete temperatures and achieve the desired durability for the bridge. With an optimal design which features the binary admixture of fly ash and slag and an optimal concrete mix ratio, high-performance concrete with lower hydration heat and strong resistance to chloride diffusion and cracking was successfully developed for the bearing platform of the sea-spanning bridge.

Study on Crack Mechanism for Concrete Bedding Cushion on Rock

2010 ◽  
Vol 163-167 ◽  
pp. 1291-1295 ◽  
Author(s):  
Min Zhi Liu ◽  
Sheng Qiang ◽  
Zhen Yang Zhu
Keyword(s):  
Tensile Stress ◽  
Great Influence ◽  
Reference Value ◽  
Mass Concrete ◽  
Prevention Measures ◽  
Concrete Dam ◽  
Depth Study ◽  
Calculation Results ◽  
Cushion Layer ◽  
Cooling Pipes

Bedding cushion cracking in concrete dam is widespread, and has not been completely prevented [1,2]. There are many cracking causes of bedding cushion, including construction difficulty and structure requirements for concrete dam. Based on the method of FEM simulative calculation of temperature and stress fields of mass concrete using water cooling pipes, this paper makes relatively in-depth study on crack mechanism for concrete bedding cushion on rock. It is revealed that all three factors of uneven thickness of bedding cushion, thickness of new dam concrete placed on cushion after off period and foundation gallery upon bedding cushion have great influence on the tensile stress of bedding cushion and should be paid special attention during construction. The calculation results show that the tensile stress of thinner concrete cushion layer is much greater than the thicker one, and the thinner upon new concrete will also make greater tensile stress in cushion. As a result, both the thinner cushion layer and the cushion with thinner new concrete on it would have a bigger chance to crack than others. The mechanism is used to explain reasonably a dam crack in construction. Then some cracking prevention measures, which should have reference value for the construction of bedding cushion, are put forward in this paper.

The Application of Water-Cooling Pipes in the Mass Concrete of Hu Lu Shan Wan Crossing Sea Bridge

2012 ◽  
Vol 490-495 ◽  
pp. 2869-2872
Author(s):  
Yi Feng Zheng ◽  
Qun Zhao
Keyword(s):  
Design Principle ◽  
Mass Concrete ◽  
Water Cooling ◽  
Cooling Method ◽  
Cooling Pipes

Based on the Hu Lu Shan Wan crossing sea bridge, this paper calculated the temperature inside and outside the mass concrete while pouring. Besides, this paper presents the process of calculating and designing of the water-cooling method which could decrease the inside temperatrue of the mass concrete in the aspect of design principle. Thereby, it could solve the crack of concrete from one facet

scholarly journals Discussion on Temperature Control Method of Cooling Water Pipe for Mass Concrete Construction

2020 ◽  
Vol 165 ◽  
pp. 04037
Author(s):  
Zhi-Gang Yang ◽  
Jin-Lan Song ◽  
Yan-Fang Hu ◽  
Kun-Fa Lee
Keyword(s):  
Temperature Stress ◽  
Control Method ◽  
Great Influence ◽  
Cooling Water ◽  
Element Model ◽  
Mass Concrete ◽  
Concrete Construction ◽  
Concrete Temperature ◽  
Short Time ◽  
Cooling Pipes

For studying the influence of cooling pipes on the mass concrete construction, the dam is taken an example to build the ANSYS finite element model. The model simulates dam concrete construction based on two projects, one without cooling pipes and the other with cooling water pipes provided. The data comparison and analyzing will be in three aspects: temperature, stress and displacement. The result shows that the cooling pipes not only can indeed reduce the concrete temperature in a short time, making the concrete reach the steady temperature more quickly, but also help to alleviate the concrete temperature stress. However, the reductions of temperature do not make a great influence on the displacement during the construction process.

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