High-strength high-performance concrete

Abstract

The invention relates to high-strength high-performance concrete. The concrete is prepared from the following components in parts by weight: 200-240 parts of cement, 20-30 parts of coal ash, 500-750 parts of sand, 800-1100 parts of rubbles, 10-30 parts of hemihydrate gypsum, 40-55 parts of kaolin, 20-40 parts of serpentine powder, 20-40 parts of zirconium silicate, 20-30 parts of polycarboxylene based superplasticizer, and 100-150 parts of water. The high-strength high-performance concrete disclosed by the invention ha the advantages of being high in strength, good in durability, good in construction liquidity, and hard to produce cracks, and the concrete is suitable for extensive popularization and application.

Description

technical field [0001] The invention relates to high-strength and high-performance concrete, which belongs to the technical field of high-strength concrete materials for building pouring. Background technique [0002] In 1824, the British engineer Asputin obtained the first cement patent, which marked the birth of cement. After that, cement and concrete began to be widely used in construction. In the middle and late 19th century, my country introduced cement production technology and built my country's first cement factory in Shanghai, which has a history of more than 100 years. [0003] The application of cement and concrete has promoted the birth of contemporary civilization. It has become the largest, most extensive and most economical building material in contemporary buildings, and is widely used in buildings, bridges, tunnels, roadbeds and other occasions. In modern times, high-rise buildings have become a symbol of big cities. More and more skyscrapers are rising, wh...

AI Technical Summary

Problems solved by technology

In modern times, high-rise buildings have become a symbol of big cities. More and more skyscrapers are rising, which put forward higher requirements for the strength, durability and construction fluidity of concrete, which cannot be met by traditional concrete. such requirements

[0004] At present, in construction engineering, cracks in concrete structures are more common. Concrete shrinks during the hardening process, and it will expand and contract when the temperature changes. When these two deformations are restrained, shrinkage stress will be generated inside the structure and the concrete will crack. And the formation of shrinkage cracks, with the development of large-scale buildings, the temperature shrinkage cracks on the concrete structure have a tendency to gradually increase, which not only affects the durability and stability of the building structure, but also affects the thermal insulation of the building structure. The call for energy saving and emission reduction does not meet

Images