Application of sequence method construction technology in crack control of mass concrete

2021 ◽  
Author(s):  
Lingxu Li ◽  
Minchang Ma ◽  
Chong Xiang ◽  
Shuixi Li
Keyword(s):  
Mass Concrete ◽  
Construction Technology ◽  
Crack Control ◽  
Sequence Method ◽  
Method Construction

Admixtures in Concrete Crack Control and Construction Technology Optimization

2010 ◽  
Vol 163-167 ◽  
pp. 1115-1120
Author(s):  
Ran Gang Yu ◽  
Xin Hu Wang
Keyword(s):  
Cooling Water ◽  
Design Calculation ◽  
Mass Concrete ◽  
Construction Technology ◽  
Element Analysis ◽  
Crack Control ◽  
Whole Process ◽  
Concrete Crack ◽  
Expansive Agent ◽  
Important Means

This paper studies properties of concrete under the action of water-reducing retarder and expansive agent; gives the optimal design calculation method of cooling water pipe in the construction technology: mainly considering pipe’s diameter, distance, cooling water’s flow, temperature, time etc; studies the optimization to the concretes construction method. Midas/Civil, one finite element analysis soft-ware, analyses mass concrete construction of the whole process of the temperature field and stress field in the numerical simulation, considering the admixtures and construction technology. The results show that commonuse of admixtures and reasonable construction technology are the important means of controlling cracks.

Study on Mass Concrete Construction Technology of Raft Foundation in Yantai Ocean Development Center

2014 ◽  
Vol 919-921 ◽  
pp. 1421-1425 ◽  
Author(s):  
Jian Zhu ◽  
Yan Bin Zhang ◽  
Xu Feng Du ◽  
Yong Jiang
Keyword(s):  
Temperature Rise ◽  
Mass Concrete ◽  
Construction Technology ◽  
High Rise ◽  
High Rise Building ◽  
Initial Stage ◽  
Building Project ◽  
Development Center ◽  
Technical Measures

Mass concrete is widely being used in the construction field, especially for the foundation of super high-rise building. In the initial stage of pouring completion of mass concrete, lots of heat generated from the cement hydration will lead to a high temperature inside of concrete. When the temperature difference between the inner and outer of concrete exceeds the limited value, thermal stress will be greater than the tensile strength of concrete, which may cause hazardous penetrating cracks of the structure. To ensure the safety and durability of concrete structure, necessary measures should be taken to control the temperature rise and construction quality of concrete. Taking a super high-rise building project as an example, this paper introduces several effective solutions to resolve above problems. The technical measures such as enhancing the concrete quality, controlling temperature rise, strengthening temperature monitoring would be detailed illustrated. Meanwhile, valuable suggestions achieved from this practical project are proposed in order to guide the structural design and on-site construction of similar projects.

Non-Structural Cracking Analysis of early Age of Reinforcement Concrete Wall

2012 ◽  
Vol 446-449 ◽  
pp. 251-259
Author(s):  
Ting Yao ◽  
Jian Ye Zhang ◽  
Jia Ping Liu ◽  
Qian Tian
Keyword(s):  
Structural Engineering ◽  
Maximum Temperature ◽  
Early Age ◽  
Mass Concrete ◽  
Concrete Wall ◽  
Crack Control ◽  
Leading Role ◽  
Real Behavior ◽  
Unique Source ◽  
Source Of Information

Structure monitoring has been increasingly valuable in recent years and has taken a leading role in the field of structural engineering. Date collected by early age monitoring represent a unique source of information for understanding the real behavior. In this paper, the temperatures evolution and concrete deformation evolution are obtained by real-time continuous monitoring of Reinforcement concrete(RC) wall. The result shows that the early age thermal cracking is one of the most important origin of several phenomena that imperil durability and shorten the lifespan of the structure. Though the wall is not considered as mass concrete, and has a big radiating surface, the maximum temperature can even reach up to 52°C due to heat generation of cement and the insulation of formwork, which can lead to shrinkage deformation when the temperature decreases. The measured experimental date can provide useful reference for early crack control and durability of RC concrete structure, and they can also be use to verify and improve the accuracy of the numerical results for RC wall, which is available in the future for basis to similar projects and research.

Research on Mass Concrete Construction Techonogy of Raft Foundation of Hongyun Building

2013 ◽  
Vol 690-693 ◽  
pp. 709-713 ◽  
Author(s):  
Su Hua Yin ◽  
Yuan Huang ◽  
Ying Hui Yuan
Keyword(s):  
Temperature Control ◽  
Mass Concrete ◽  
Construction Technology ◽  
Concrete Construction ◽  
Core Tube ◽  
The Core ◽  
Raft Foundation ◽  
Concrete Base

The foundation of A tower of Hongyun building is made of raft board foundation which is 4200mm in the thickness and 3500mm beside side of the core tube. It is researched that the raft foundation mass concrete construction technology is expatiated from temperature and cracks of the raft foundation and the temperature control and monitoring of the concrete base slab construction and concrete curing.

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