Application of Expanding Agent in High Performance Concrete from quangongzi's blog

Data link: This paper presents the concept of high performance expanded concrete (HPEC), that HPEC is the expansion of concrete (EC) and high performance concrete (HPC) to play their respective advantages of organic combination. Firstly, the strength performance, expansion performance and the coordination between the expansion and the strength of the HPEC concrete are introduced systematically. The effects of the expansion and strength on the expansion and strength of the concrete are discussed. Hydration mechanism.Double Steel Roller - Road Machinery Equipment Manufacturers - Doan Machinery <.p>

Over the past 10 years, the research of concrete materials has been developed in the direction of high performance concrete (HPC), not only with high strength, but also with good construction and durability. In the configuration of high-performance concrete, are usually mixed with a superplasticizer (superplasticizer) and ultra-fine mineral admixture, which achieved a low-hydration, low cement, low hydration heat and high performance The With the development of concrete construction technology, the expansion of concrete has also entered the fluidization, high strength, superplasticization stage. All the trend of diversification of cementing materials, and widely used pumping concrete construction technology, and some also to achieve self-dense construction. It can be seen that the development of expansive concrete has entered the field of high performance concrete, on the one hand in the material preparation and construction are with high performance concrete characteristics; the other hand, in order to ensure the stability of high-performance concrete volume, Some bulking agent to compensate for its contraction. Expanded concrete and high performance concrete organic combination, forming a high-performance expansion of concrete (HPEC).

The shrinkage is large and the tensile strength is lower than that of concrete. When the shrinkage causes the tensile stress inside the concrete to exceed the tensile strength of the concrete, the concrete is cracked. It is generally considered that the fracture is the biggest drawback of concrete, which will lead to moisture, such as the invasion of harmful media, to accelerate the corrosion of steel bars and reduce the durability, and cause leakage is the phenomenon of structural use of the function of the reduction or loss.