Self-compacting mass concrete construction method

Abstract

The invention discloses a self-compacting mass concrete construction method. The self-compaction mass concrete constructing method includes the steps of preparing self-compacting concrete, transporting the self-compacting concrete, pouring the self-compacting concrete, conducting curing and temperature control on the self-compacting concrete, and the like. The self-compacting concrete is composed of cement, aggregate, coal ash, additives, silica fume and a compound type WK expansion fiber anti-crack agent. According to the self-compacting mass concrete construction method, proportioning of the self-compacting concrete and the construction process are improved, so that it is guaranteed that the concrete has high fluidity, high anti-separating performance, high gap passing capacity and high filling ability simultaneously, and the mechanical property and durability of a structure are improved.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a construction method of self-compacting mass concrete. Background technique [0002] Concrete has been used in engineering construction for more than 170 years. With the continuous increase in the variety of concrete raw materials, the continuous enrichment and development of concrete manufacturing processes, and the application of high-efficiency admixtures and active admixtures, concrete has become composite, high-strengthened, and high-performance. With the development of the industry, the application of special concrete has become more and more extensive, and its status in engineering construction has become more and more important. [0003] Self-compacting concrete can be filled with complex models by its own weight, can pass through dense reinforcement, and maintain its own uniformity in the process, and its various mechanical properties and durability can be achieved ...

AI Technical Summary

Problems solved by technology

[0003] Self-compacting concrete can be filled with complex models relying on its own weight, can pass through dense steel bars, and maintain its own uniformity in the process, and its various mechanical properties and durability can reach the same level under the same curing conditions and standard curing conditions. The requirements of ordinary concrete, so it must have high fluidity, high separation resistance, high gap passability and filling performance, but there are certain contradictions between the above properties, such as the contradiction between high fluidity and separation resistance, and There is also a certain contradiction between the high working performance of self-compacting concrete and its mechanical properties and durability, which affects the quality of the structure.

At present, there is no reliable way to balance the interrelationships and contradictions of the above properties. For example, the domestic preparation of vibration-free self-compacting concrete mainly relies on the addition of high-efficiency water-reducing agents to achieve high fluidity. However, high-efficiency water-reducing agents have a strong impact on cement particles. The dispersing effect, and prevent the dispersed particles from agglomerating, affecting the resistance to separation

In addition, for large-volume concrete, the alkali-aggregate reaction, the large amount of hydration heat emitted by the cement during the concrete setting process, and the temperature difference effect will lead to structural cracking and affect durability.