Carbon nanotube composite high-performance concrete with impact resistance

Abstract

The invention discloses a carbon nanotube composite high-performance concrete with impact resistance. The carbon nanotube composite high-performance concrete with impact resistance is characterized inthat the raw materials of the carbon nanotube composite high-performance concrete with impact resistance include cement, multi-walled carbon nanotubes, silica fume, fly ash, sands, a water reducer and water; and the multi-walled carbon nanotubes are one of ordinary multi-walled carbon nanotubes, special-structure multi-walled carbon nanotubes and surface-treated multi-walled carbon nanotubes. Themulti-walled carbon nanotubes can significantly enhance the dynamic compressive strength and the impact toughness of the high-performance concrete. When the strain rate is in a range of 200-800 / s andthe dosage of the multi-walled carbon nanotubes is 0.25-0.5%, the dynamic compressive strength of concrete can be maximally increased by 99.6%, and the impact toughness can be maximally increased by100.8%.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a carbon nanotube composite high-performance concrete with impact resistance. Background technique [0002] Due to its excellent properties such as high durability, high workability, high strength and high volume stability, high-performance concrete has shown its unique advantages in bridges, high-rise buildings, harbor buildings and military bunkers. However, as a multi-phase and multi-scale material, the high brittleness and low energy consumption of high-performance concrete make it prone to collapse once the limit of bearing capacity is exceeded. What is more serious is that under high strain rate dynamic impact load, the compression time of concrete becomes shorter, the effective stress area decreases, and the brittle failure of concrete materials will be further aggravated, seriously affecting the safety of concrete structures. [0003] In engineering, steel fib...

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Problems solved by technology

However, the high price and relatively high dosage of nanoparticles (generally accounting for 1%-10% of cement quality) make them have certain disadvantages in terms of economic benefits.

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