Chemical-erosion-resisting, high-strength and high-toughness concrete and preparation method thereof

Abstract

The invention provides chemical-erosion-resisting, high-strength and high-toughness concrete and a preparation method thereof. The concrete includes cement, river sand or artificial sand, water reducer, water and a composite functional material; the composite functional material includes roasted products, namely carbon nanotubes, of organic matter and a roasted product of layered double-metal hydroxide; the composite functional material is prepared in the step that divalent and tervalent metal salt used for preparing layered double-metal hydroxide, organic matter and metal salt catalysts used for preparing the carbon nanotubes, and alkali metal hydroxides are mixed evenly, then crystallized at 70-150 DEG C and finally calcined at 500-1000 DEG C in an inert atmosphere. According to the concrete and the preparation method thereof, the dispersion problem of the carbon nanotubes in cement materials is solved, and the problems that the compatibility of the carbon nanotubes with the cement materials is poor and the bonding strength of the carbon nanotubes is low. The concrete obtained by the preparation method can cure harmful gas or anions invading from the outside, the toughness and strength of the concrete can be increased, and the durability of the concrete is improved.

Description

technical field [0001] The invention relates to the field of building materials, and belongs to cement-based concrete with ultra-high strength and high toughness against chemical erosion and a preparation method thereof. Background technique [0002] Due to the lack of durability of concrete engineering, it is very common for concrete engineering to suffer from diseases or even serious accidents before reaching the design life in the service environment, resulting in huge economic losses. How to improve the durability of concrete has been highly valued by the field of concrete engineering. [0003] The influencing factors and damage mechanism of concrete durability are complex, most of which are related to the impermeability of concrete, mainly depending on the difficulty of water, harmful liquid and harmful gas transporting to its interior. Among the concrete durability indicators, the carbonation resistance, chloride ion penetration resistance and sulfate erosion resistan...

AI Technical Summary

Problems solved by technology

These admixtures have a certain pozzolanic activity and micro-aggregate filling effect, which can improve the compactness of concrete to a certain extent and enhance its impermeability. However, after a large number of mineral admixtures replace Portland cement, the concrete alkalinity and The calcium-silicon ratio of C-S-H gel is reduced, which is not conducive to improving the chemical corrosion resistance of concrete

Images