An anti-erosion aluminophosphate cement-based gel material suitable for marine engineering

Abstract

The invention discloses anti-erosion phosphoaluminate cement based cementing material applicable to ocean engineering. The anti-erosion phosphoaluminate cement based cementing material consists of 60-75% of an iron-rich phosphoaluminate cement clinker, 5-15% of coal ash, 3-8% of silicon carbide powder, 2-6% of rubber powder, 3-6% of an anti-alkali glass fiber and 0.5-2% of an aluminum-zirconium coupling agent. By virtue of properties such as early strength, high strength, corrosion prevention, permeation prevention and freezing resistance of iron-rich phosphoaluminate cement, together with materials such as the coal ash, the silicon carbide, the rubber powder, the aluminum-zirconium coupling agent and the anti-alkali glass fiber, the material is good in flashing resistance and abrasion resistance, the properties of a high polymer are sufficiently brought into play, and the chloride penetration resistance and the abrasion resistance of the structure are improved.

Description

technical field [0001] The invention relates to an erosion-resistant aluminophosphate cement-based gelling material suitable for marine engineering, and belongs to the technical field of building materials. Background technique [0002] The marine environment is a complex corrosive environment. Seawater is a highly corrosive natural electrolyte in nature. It contains a large number of corrosive ions. With the movement of suspended sediment or moving sediment, hard sand particles and other suspended matter with certain kinetic energy repeatedly impact and cut the flow wall of the drainage structure, resulting in wear and fracture of the flow wall. The main manifestations are: Because the surface of the material has scale-like pits and a large number of cracks, the durability of marine engineering structures continues to deteriorate under the action of this erosive environment, resulting in a decrease in bearing capacity and structural damage. Therefore, in addition to strong...

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Problems solved by technology

Aiming at the anti-abrasion performance and anti-cracking performance of concrete, the existing research results show that the anti-abrasion strength of concrete mixed with silica fume is higher, but the concrete with silica fume is prone to plastic cracking; the anti-abrasion strength and toughness of concrete mixed with conventional fiber It has been improved, but its alkalinity is high, which is not conducive to the long-term durability of the fiber; the introduction of fly ash can improve the crack resistance of concrete, but its interface adhesion is weak; the polymer can improve the flexibility and crack resistance of cement, However, its dispersion has not been effectively resolved, and its advantages cannot be fully utilized

At the same time, the existing anti-scouring concrete has poor ion erosion resistance, and the service time in the marine environment is short, which is far from meeting the service time requirements for marine engineering.

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