Admixture for marine engineering concrete and preparation method of admixture

Abstract

The invention relates to the field of buildings, in particular to an admixture for marine engineering concrete and a preparation method of the admixture. The admixture is prepared from raw materials in parts by weight: 100-150 parts of a water reducing agent, 0.5-1 part of tetramethylammonium iodide, 1-5 parts of sodium ethoxide, 3-5 parts of polyacrylamide, 30-50 parts of a surfactant, 15-20 parts of a rust inhibitor, 30-50 parts of an expansion agent, 3-5 parts of a retarder, 6-10 parts of a deforming agent and 0-80 parts of water. The invention aims to overcome the shortcomings of the priorart and provide the admixture for the marine engineering concrete and the preparation method of the admixture, the effects of water reduction, rust resistance, defoaming and retarding are achieved, and the effects are improved; the admixture is added into the concrete, so that the flowability of concrete slurry is improved, retentivity is good, the water reduction rate is high, the density of theconcrete is improved, good flocculability is achieved, and the friction resistance between liquid can be reduced; and the grinding efficiency is improved, and the admixture has the characteristics ofexcellent anti-permeability, fast hardening and early strength, high later strength and the like.

Description

technical field [0001] The invention relates to the field of construction, in particular to an admixture for marine engineering concrete and a preparation method thereof. Background technique [0002] Cement concrete is a traditional building material, but traditional concrete with low strength and single function is far from meeting the requirements of large-scale structures under special conditions such as marine environments. Various marine structures built in the world today, such as cross-sea Bridges, port terminals, subsea tunnels, coastal highways, offshore oil drilling platforms, docks, etc. all use reinforced concrete as the main building and structural materials. my country's coastline is more than 32,000 kilometers long. With the rapid development of the national economy and the full development of infrastructure construction, the amount of concrete has increased sharply. raw materials. [0003] Marine concrete is widely used in seaports, wharfs, flood embankment...

AI Technical Summary

Problems solved by technology

[0005] Ordinary marine concrete cannot meet the performance requirements of marine engineering, and usually needs to be optimized by adding various admixtures or admixtures. At present, there are many kinds of admixtures in the existing technology, but there are many defects, such as water-reducing effect Although it is better, the bleeding rate increases, which affects its quality uniformity; or the adaptability to cement varieties is poor, which may easily cause early setting of concrete, affecting the normal construction of the project, etc.

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