Carbon fiber reinforced ultra-high performance concrete and preparation method thereof

Abstract

The invention relates to carbon fiber reinforced ultra-high performance concrete, which is prepared from the following components in parts by weight: 535-700 parts of a cementing material, 0-420 parts of aggregate, 70-150 parts of water, 7-35 parts of a water reducing agent and 1-10 parts of carbon fibers. The carbon fibers are a material with good chemical stability, and when corrosive ions such as Cl <-> and SO4 < 2-> invade into an interface between the carbon fibers and a hydration product, as the C element on the surface of the carbon fiber is very stable and does not chemically react with the Cl <-> and the SO4 < 2->, a carbon fiber-matrix interface structure on the surface of the carbon fiber reinforced ultra-high performance concrete is not easily damaged by corrosive ions in seawater and sea sand, and the carbon fiber reinforced ultra-high performance concrete has relatively high corrosion resistance. Carbon fibers and marine resources are jointly applied to the ultra-high performance concrete, the technical approach is novel, the marine resources can be effectively utilized and applied to marine buildings such as port buildings and island buildings, and remarkable social and economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a carbon fiber reinforced ultra-high performance concrete and a preparation method thereof. Background technique [0002] Ultra-high performance concrete (UHPC), also known as reactive powder concrete, has super compressive strength (above 120MPa), low porosity and excellent durability, and has been widely valued in the field of civil engineering, especially for super high-rise buildings. , lightweight, and long-span direction. Due to the problems of weak tensile strength and poor toughness of ultra-high performance concrete, steel fibers are usually mixed into ultra-high performance concrete as a toughening material to improve its toughness and ductility. [0003] During the twentieth century, the research of ultra-high performance concrete pursued the development of high strength and high performance. Subsequently, the focus of research has shifted, mainly focusing...

AI Technical Summary

Problems solved by technology

Nowadays, marine resource reserves are sufficient, but the utilization rate is very low

There are a large number of corrosive ions such as chloride ions and sulfate ions in seawater and sea sand, which can easily lead to corrosion of steel fibers in ultra-high performance concrete, causing cracks and shortening the service life of components

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