Marine concrete, marine concrete impermeable agent, and preparation method and application thereof

Abstract

The invention relates to the technical field of concrete anti-permeability agents, in particular to marine concrete, a marine concrete anti-permeability agent and a preparation method and applicationthereof. The anti-permeability agent is prepared from the following raw materials in percentage by weight: 8 to 55% of Portland cement clinker, 5 to 52% of high-iron sulfoaluminate cement clinker and10 to 40% of over-burnt dicalcium silicate. The main effective components of the anti-permeability agent are Portland cement clinker, high-iron sulfoaluminate cement clinker and over-burnt dicalcium silicate, and the anti-permeability of the marine concrete can be improved, and the marine concrete has the long-term mechanical property and anti-permeability. Meanwhile, on the basis of the hydrationrates of the Portland cement clinker, the high-iron sulfoaluminate cement clinker and the over-burnt dicalcium silicate, the particle sizes of the anti-permeability agent are matched to generate a synergistic effect, and the anti-permeability of the marine concrete is improved.

Description

technical field [0001] The invention relates to the technical field of concrete anti-seepage agents, in particular to a marine concrete, an anti-seepage agent for marine concrete and a preparation method and application thereof. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] my country's coastline stretches for 18,000 km, among which marine construction (such as artificial islands, harbor wharves, submarine tunnels, submarine pipelines, cross-sea bridges, etc.) is huge in scale, and various marine engineering materials are irreplaceable materials in marine engineering construction, and the amount is huge . However, in the harsh marine environment (such as h...

AI Technical Summary

Problems solved by technology

[0005] (1) Add fly ash, steel slag, slag, etc.; to generate more C-S-H gel, AFm and improve compactness to achieve solidification and transmission retardation of harmful ions in seawater, but improve concrete impermeability limited range

[0006] (2) Adding ultra-fine admixtures or nanomaterials: such as nano-silicon dioxide, nano-alumina, nano-calcium carbonate, etc.; although this method can improve the compactness of concrete to a certain extent, the dosage is large It will reduce the workability of concrete, it is not convenient for construction, and it will significantly increase the cost of concrete

[0007] (3) Epoxy coating: organic coating has good water resistance and toughness, but its anti-aging and anti-wear ability is poor, resulting in a low service life

Inorganic coatings have poor adhesion and toughness to concrete

[0008] (4) Reduce the water-cement ratio; although reducing the water-cement ratio can reduce the porosity of concrete, improve the compactness, and achieve a good impermeability effect, the reduction of the water-cement ratio will also reduce the workability of concrete and increase the difficulty of construction

However, the inventors have found that adding strong fibers, bentonite and airtight preservatives does not significantly improve the interfacial transition zone of concrete, and will significantly increase the cost of concrete to a certain extent

[0010] The patent document with the application number 201811551819.1 discloses "an anti-permeability marine concrete anti-corrosion admixture and its preparation method". The admixture has good concrete impermeability and is composed of slag powder, modified Compounded with ethylethylenediamine, silica hollow microspheres, tetramethylammonium iodide, calcium nitrite, 2-amino-2-methyl-propanol, polycarboxylate water reducer, allophane powder However, the inventors found that the preparation process is complicated, the cost is high, and the addition of too many organic components will affect the hydration of cement and the mechanical properties of the sample

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