[Abstr] Crack is a common action effect in reinforced concrete structures, and it is difficult to avoid cracks in reinforced concrete structures.In view of the cracks in reinforced concrete structures, this paper analyzes various factors that cause cracks from the aspects of design, load, raw materials, construction, etc., and puts forward pre control measures.
On the causes and control of cracks in reinforced concrete structures - Figure 1
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Cracks in reinforced concrete structures are a common phenomenon in construction projects. This article focuses on the analysis of the causes of this phenomenon and the identification of cracks, and discusses the methods to deal with cracks in reinforced concrete based on practical construction experience.
This paper classifies reinforced concrete cracks, puts forward prevention measures for various types of cracks, and introduces the treatment methods of cracks
In the current engineering projects, a considerable number of reinforced concrete thin-walled abutments (piers) and reinforced concrete box culvert bodies have vertical cracks with different numbers, lengths and widths during the construction process or at the initial stage of completion.In order to solve this problem, measures have been taken in the design, such as densifying reinforcement, increasing reinforcement diameter and increasing concrete grade, but the practice has proved that the situation has not been improved.Although the existence of these cracks will not affect its structural function and bearing capacity at present or in the future, if these cracks cannot stop developing or be properly treated, they will definitely have an adverse impact on the durability of the structure, especially when the structure is corroded by harmful gas or liquid or is wetThe contradiction between frozen environment and coastal areas is more prominent.Due to the durability defects of concrete structures, some developed countries consume huge amounts of money every year for the maintenance of structures, which is enough to prove the importance of this problem
Cracks in concrete structures are inevitable.This paper discusses in detail the causes of concrete cracks from seven aspects, such as load, temperature change and shrinkage, and puts forward crack control measures from the aspects of design, materials and on-site construction. Finally, it briefly introduces the treatment methods after the cracks appear.
Abstract: This paper analyzes on the causes and forms of the cracks in the reinforced concrete structure, probes into the repair methods of the concrete cracks, and compares several repair methods, so as to solve the cracks in the reinforced concrete structure and improve the durability of the concrete engineering.
Abstract: This paper analyzes on the causes and forms of the cracks in the reinforced concrete structure, probes into the repair methods of the concrete cracks, and compares several repair methods to solve the cracks in the reinforced concrete structure, so as to improve the durability of the concrete engineering
Many concrete structures will appear various kinds of cracks in varying degrees after being put into use. When identifying and analyzing them, it is necessary to evaluate and analyze the cracks.However, there are many types of cracks, which have different causes and characteristics, and have different effects on the durability and safety of the structure.
Abstract: In recent years, cast-in-place reinforced concrete structures have been widely used in civil building design because of their strong integrity, good seismic performance, flexible and simple construction and other advantages.However, many problems have been found in the application, especially the cracks in cast-in-place concrete floor slab, which have become a more common problem.Through the analysis of the causes of cracks, this paper puts forward relevant concrete measures to prevent cracks.
With the development of urban construction and the deepening of the housing reform system, users have increasingly high requirements for the housing environment and quality. There are often various complaints, especially the building (housing) cracks
Shrinkage cracks are caused by shrinkage of concrete.The main influencing factors of shrinkage are water consumption and cement consumption in concrete. The higher the water consumption and cement consumption, the greater the shrinkage of concrete
[Abstract] With the rapid development of urban construction, especially housing construction.In the context of the prosperity of the construction industry, the competent construction department has also received more complaints, especially the cracks in the housing concrete is one of the most common problems
[Abstract] This paper discusses various reasons for cracks in concrete construction, and puts forward effective measures to deal with cracks in concrete construction in combination with the current situation of the project and the construction environment
Abstract: Crack is one of the most common quality problems in construction engineering. Through years of on-site observation and practice, this paper briefly analyzes and discusses the causes of concrete cracks and cracks, and crack prevention.
Abstract: The concrete structure crack is a very difficult problem to solve in today's engineering field. If cracks often appear in the concrete during construction, the integrity and durability of the structure will be affected
[Abstract] On the basis of a brief summary and analysis of the mechanism and characteristics of concrete temperature cracks, combined with the influencing factors, this paper proposes targeted preventive measures and treatment methods after the cracks appear
Guide reading: cracks in concrete structures, especially cracks in cast-in-place concrete slabs, cracks in concrete frame beams and columns, and cracks in concrete shear walls, are common quality problems in current concrete structures.The cracks caused by the first kind of load are generally considered in the design stage of the structure, so the cracks caused by the first kind of load are allowed by the design code and are not harmful to the structure.Key words: concrete, hazards, causes, prevention measures
Abstr: This paper first analyzes the characteristics of cracks in cast-in-place reinforced concrete floor slab and the causes of common cracks, and puts forward specific preventive measures and treatment methods for your reference.
Concrete is a kind of shrinkage material. After concrete pouring, the cement hardens, the water evaporates rapidly, the concrete volume shrinks sharply, and the shrinkage deformation will also produce tensile stress
This paper analyzes on the causes of the cracks of reinforced concrete from the aspects of the load effect, the plastic shrinkage of concrete, the hydration heat of concrete, the changes of temperature and humidity, etc., expounds the adverse effects of the concrete cracks, puts forward the comprehensive technical measures for controlling the concrete cracks, and puts forward the relevant crack treatment methods, so as to prevent or eliminate the cracks.
By accident of fate, I changed my profession from other majors to structural design at nearly 30 years old.At the first contact, I felt that as long as I mastered "calculation+construction", I seemed to have mastered the structural design
This data refers to the seismic damage of multi-storey reinforced concrete structures. The main contents are: 1. The seismic damage caused by unreasonable structural layout, torsional damage, failure of weak layers, stress concentration, and collision prevention at seismic joints 2. The seismic damage of frame structures, overall damage form, local damage form 3. The seismic damage of structures with seismic walls
Cracks are a common action effect in reinforced concrete structures. Concrete structure cracks are the most common and difficult to avoid phenomenon in the construction industry. Cracks can endanger the safety of the structure, or affect the normal use of the house and the life of the concrete.This paper classifies the cracks from different angles, and analyzes the causes of concrete cracks and the preventive measures and treatment techniques.It has certain guiding significance for the research and practice of how to control concrete cracks during construction.
[Abstract]: In recent years, cast-in-place concrete structures have been widely promoted and applied in China because of their strong integrity, good seismic performance, and the massive use of commercial concrete, high-strength and high-performance concrete.
With the wide use of concrete in building construction, the problem of cracks in concrete has become a widespread quality problem in engineering construction, which has attracted more and more social attention.This paper analyzes the causes of cracks, and puts forward preventive measures and remedial methods.
Concrete cracks have always affected the construction quality.How to effectively control cracks and make buildings have good durability and structural stability is the theme of this paper.
The crack control problem of reinforced concrete is one of the very important problems in construction engineering. Especially in the recent 20 years, after the pumping commercial concrete has been widely used, the concrete homogeneity has been greatly improved, while the crack control technology has greatly increased. This paper is based on a large number of construction practices and field experimental research,The causes of cracks caused by deformation, the characteristics of constrained deformation, the design criteria for resistance and release, and the comprehensive technical measures are summarized.
Masonry structure still has a very broad application prospect in the load-bearing structure and maintenance structure of industrial and civil buildings.We should not underestimate the cracks in masonry structure, and should be able to find and deal with them as soon as possible.
Abstract: Concrete cracks have always been a common quality problem that has puzzled the construction industry for many years, such as more and deeper cracks, which will directly affect the structural safety.This paper expounds the types of concrete cracks, analyzes on the main causes of the cracks, and puts forward some preventive measures.
The crack of cast-in-place concrete is a troublesome problem that many new and old construction personnel have encountered. If the measures taken are not targeted and the methods are not appropriate, the resulting consequences will not only fail to deal with the crack, but also cause considerable negative impact
Abstract: Crack control problems are commonly encountered in the construction of mass concrete, because the concrete volume is large, and the accumulated large amount of hydration heat will lead to uneven internal and external heat dissipation of the concrete. Under the condition of internal and external constraints, large temperature stress will be generated in the concrete and it is likely to cause cracks, which will eventually bury serious quality hazards for the engineering structure
In the process of bridge construction and use, cracks appear in cast-in-place reinforced concrete structural members, which is very worthy of attention.The development of cracks will cause abnormal internal stress or deformation of the structure, which may seriously endanger the structural safety and normal use of the bridge
Because the lining structure of tunnel works has been in complex stratum for a long time, the concrete of lining structure is not only squeezed by the surrounding soil, but also affected by non load factors, resulting in different types of cracks on the inner surface of lining.This paper introduces the causes of cracks in tunnel lining structure under non load, and the technical methods suitable for crack repair.
The so-called thin-walled structure refers to the pool, underground pipeline, basement side wall and other structures.If cracks appear in these structures, they are usually penetrated, which has a great impact on the use function
The main reason for such cracks is that the concrete aggregate is blocked during settlement (such as reinforcement and formwork).This kind of crack mostly occurs 0.5~3 hours after the concrete is poured. The concrete is still in a plastic state. It occurs immediately when the concrete surface disappears. It appears along the direction of the reinforcement on the beam and slab, mainly due to the large slump and high subsidence of the concrete
It is a common phenomenon that copper reinforced concrete structures of housing buildings produce cracks in the process of construction and use. Theoretically, reinforced concrete structures often work with cracks (when the service load is not large, there are no cracks or such structural cracks are very subtle and difficult to be detected by the naked eye). In reality, reinforced concrete structures will appear various cracks,This paper analyzes and discusses the causes and preventive measures of common cracks in concrete structural members of building construction.
Abstract: The structure mainly relies on ductility to resist the inelastic deformation under large earthquake action. Therefore, the ductility of the structure and the strength of the structure are of equal importance under earthquake action