Repost: Concrete construction techniques in engineering

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This post was last edited by hesonchang214 on 2017-9-23 21:51. Concrete construction techniques in engineering. Abstract: At present, to ensure the successful implementation of concrete construction techniques in civil engineering, it is necessary to carry out the work in an orderly manner by strictly following the relevant procedures. In the actual process of concrete construction, it is necessary to conduct comprehensive analysis and research on the construction techniques, ensuring that construction instructions are followed at every stage of the process. Only by doing so can the quality of concrete work in civil engineering be truly guaranteed. In light of this, this paper primarily focuses on the analysis and discussion of concrete construction techniques in civil engineering. 　　Keywords: Civil engineering; Concrete; Construction technology Body text: 1. Characteristics of concrete construction in civil engineering Based on an analysis of the current practices in concrete construction within civil engineering, it can be seen that there are a variety of characteristics, and the construction intensity is relatively high; all these aspects reflect the traits of concrete construction. In the process of concrete construction in civil engineering, it is not only necessary to ensure the quality of such concrete work, but it is equally important to upgrade and apply advanced concrete construction techniques as well. The characteristic of high strength in concrete used in civil engineering is the most prominent; furthermore, during the construction of concrete in civil engineering projects, the continuity of this construction process is also very notable. In the practical application of concrete construction techniques, pouring must be carried out continuously. Only by strictly following the relevant specifications during construction can the quality of the entire civil engineering project be improved to the greatest extent possible. When concrete from civil engineering is used in practice, the quality of the material must also be strictly controlled. 　　2. Analysis of concrete construction techniques in civil engineering construction 2.1 Material control and mixing First, quality control of aggregates. The aggregates used in concrete construction in civil engineering are mainly sand and gravel, and their quantity is primarily determined by the amount of concrete required. However, the quality of the selected aggregates has a direct impact on the quality of the concrete construction. Second is the quality of the cement. Cement types can be mainly divided into general-purpose cement, special-purpose cement, and specialty cement. These are all materials used in concrete construction, so it is necessary to select the appropriate type of cement and its properties based on the actual conditions. Ensuring the quality of cement strictly is necessary to achieve a scientific and rational mixing of concrete. During the actual construction process, it is essential to specify the grade, type, and batch number of the cement used. Additionally, the warehouse in which the cement is stored must be kept dry at all times to prevent it from becoming damp. When preparing concrete, the various ingredients such as mineral admixtures, sand and gravel, cement, and water are mixed together in accordance with specific proportions. Appropriate methods and tests are used to adjust these ingredients so that they meet the relevant technical standards. 　　2.2 Concrete pouring The first step is to ensure that the construction site is properly cleaned. Before pouring the concrete, it is necessary to thoroughly clean the construction site; in particular, any debris and water present on the site must be removed promptly to avoid interfering with subsequent construction work. Secondly, it is also necessary to keep track of the correlation coefficient of the template in a timely manner. During concrete pouring, formwork technology is extremely important; parameters such as the position, elevation, strength of the formwork, as well as its storage conditions, have a significant impact on the accuracy of concrete pouring. Additionally, it is necessary to familiarize oneself with these aspects in detail before pouring, so as to lay a solid foundation for the subsequent pouring process. Furthermore, different pouring locations require different pouring methods. During the construction of civil engineering projects, the methods used for pouring concrete vary depending on the specific location where work is being carried out. For example, when constructing the foundation, it is necessary to treat the pouring of concrete used for the foundation differently from that used for the main structure. It is important to note that various problems may arise during the pouring process; therefore, it is essential to analyze the causes promptly and devise effective measures to address them. Finally, ensure uniform density during the pouring process. In the construction process of civil engineering projects, concrete pouring is analyzed with a focus on ensuring its compactness and uniformity, in order to prevent gaps from occurring during pouring to the greatest extent possible. To effectively improve the quality of pouring, it is necessary to strictly control the compaction of the concrete in order to ensure its density after it has been shaped. 　　2.3 Concrete vibration The selection of the vibration rod, as well as its arrangement and usage during the vibration process, all affect the effectiveness of vibration. When using it, it is necessary to pay attention not only to the force applied during vibration but also to the speed at which it is carried out. While inserting the rod quickly and pulling it out slowly, the distance covered by each movement of the rod should be kept within 1.5 times its radius of action, and the distance between various insertion points should be maintained at less than 450 mm. At the same time, during vibration, the vibrator must maintain a certain distance from formwork, embedded pipes, embedded components, and so on, in order to avoid damage or displacement. If there is an excessive amount of concrete in the area being vibrated, along with the presence of cold joints, this will increase the difficulty of concrete construction; in such cases, it is necessary to adjust the vibration method or speed promptly. 2.4 Concrete Curing First and foremost, it is essential to ensure adequate curing – continuous curing for 28 days is usually required for the concrete to set and harden. Next, it is important to carry out proper watering during concrete curing, using spraying methods to keep the concrete material in a moist state. Finally, during the curing process of the concrete structure, it is necessary to constantly monitor temperature changes, preventing large differences between the inside and outside temperatures, and taking timely measures to maintain heat retention or reduce temperature. Additionally, the curing time can be determined based on the thickness of the concrete and the relevant construction requirements, in order to prevent cracks from forming due to exposure to dry weather, which could otherwise have a severe impact on the cost and schedule of construction projects. In short, as urbanization progresses, the demands on civil engineering construction are also increasing. In the concrete construction process within civil engineering, it is important to focus on optimizing techniques in order to ensure the quality of the entire project. In the process of civil engineering construction, concrete work is a very important aspect, and it is also key to ensuring the quality of the entire civil engineering project. 　　References:
Zhang Wei. Analysis of concrete construction techniques in civil engineering projects. Doors & Windows, 2017, (05): 108.
Liu Xiangyang. An in-depth study of concrete construction techniques in civil engineering projects. China’s New Technologies and Products, 2016, (17): 107–108.
Ran Ayang. An in-depth study of concrete construction techniques in civil engineering projects. Building Materials & Decoration, 2016, (09): 15–16.
Li Shanghua. Analysis of the key elements of concrete construction techniques in civil engineering projects. Enterprise Science, Technology & Development, 2015, (11): 58–59.
Sun Liying. Research on concrete construction techniques in civil engineering projects. Science, Technology & Enterprises, 2013, (20): 234.

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