Vibration-free self-flowing dense concrete

Abstract

The invention provides a C50 non-vibration self-flowing dense concrete used in the construction structures such as bridges, of which the mixing proportion by per cubic meter is that 375kg of concrete, 162kg of fly ash, 167kg of water, 767kg of sand, 901kg of gravel and 10.74kg of high efficiency water reducing agent; water-gel ratio is 0.325 and mortar-aggregate bond ratio is 0.352: 0.648; the invention can evenly and densely fill in a structure with dense concrete reinforcing bars and complicated physiques without stirring by relying on self weight of the concrete, which conquers the defect of structure quality of being not dense, etc.; the invention meets the requirements of C50 common concrete for working performance, mechanical property, impermeability, freezing resistance, Chloride ions diffusibility resistance, shrinkage and creep property, etc., and has good workability and little gradual loss in slump.

Description

technical field [0001] The invention relates to a vibration-free self-flowing dense concrete, in particular to a C50 vibration-free self-flowing dense concrete mix ratio applied to building structures such as bridge engineering, and belongs to the field of building materials. technical background [0002] From the late 1980s to the present, for more than 20 years, many countries have carried out a lot of research and development work on high-performance concrete, and the technology is changing with each passing day. Due to its good workability, high mechanical properties and high durability, high-performance concrete has been widely used in civil engineering, such as highway engineering, bridges, high-rise buildings, marine engineering, and important hydraulic structures. In recent years, my country is at the peak of domestic road and bridge construction. With the continuous development of modern bridges in the direction of long-span, high-tech, and s...

AI Technical Summary

Problems solved by technology

Some bridges are difficult to vibrate due to factors such as dense reinforcement, complex shape, and thin-walled structure, and there are structural quality defects such as lack of compactness.

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