A kind of concrete and preparation method thereof

Abstract

The application relates to the field of concrete, and specifically discloses a concrete and a preparation method thereof. A concrete, made of the following raw materials by weight: 280-320 parts of cement, 30-50 parts of magnesium-based composite fiber, 730-780 parts of sand, 1000-1050 parts of gravel, 80-120 parts of polymer, powder 50-90 parts of coal ash, 40-80 parts of ceramsite, 5-6.5 parts of water reducing agent, 28-33 parts of expansion agent, 7.2-9.5 parts of waterproofing agent, 5-8 parts of tackifier, 0.8-1.5 parts of fiber and 130-150 parts of water; the preparation method of magnesium-based composite fiber is as follows: (1) disperse nano-carbon nitride in absolute ethanol, ultrasonic 30-60min; (2) evaporate absolute ethanol to obtain dry nano-carbon nitride , and wrap it with aluminum foil for later use; (3) Heat and melt the magnesium alloy. When the magnesium alloy is completely melted, add carbon nitride wrapped in aluminum foil, and after ultrasonic dispersion is uniform, pour it into a mold and cast an ingot to obtain a magnesium-based composite ingot; (4) The magnesium-based composite ingot is milled to obtain the magnesium-based composite fiber; the concrete prepared by the application can not only improve the damping performance of the concrete, but also ensure the mechanical strength of the concrete.

Description

technical field [0001] This application relates to the technical field of concrete, more specifically, it relates to a kind of concrete and its preparation method. Background technique [0002] Concrete is a building material produced by mixing cementitious materials, coarse and fine aggregates, and water, and then undergoing certain processes, such as pouring, vibrating, curing, and repairing. Concrete material has become one of the construction engineering materials with the largest amount and the widest range of use in construction engineering due to its good performance. With the advancement of urbanization in my country, super-high, super-deep and super-large-scale construction projects are constantly emerging. In addition, for areas with frequent earthquakes, higher requirements are put forward for the performance of concrete. [0003] The damping performance of concrete has a very important influence on the seismic performance, service stability and durability of bui...

AI Technical Summary

Problems solved by technology

The introduction of fibers into concrete will not reduce the mechanical properties of concrete, but the effect of fibers on improving the damping performance of concrete is limited; the introduction of viscoelastic materials such as rubber powder and polymers can significantly improve the damping performance of concrete materials, but viscoelastic materials are mainly The mechanical properties and deformation properties of polymer materials do not match those of concrete materials, and the compressive strength and elastic modulus of concrete materials can be significantly reduced if the dosage is small, so it cannot be used as a structural material

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