Inorganic cementing material and preparation method thereof

Abstract

The invention discloses a micro / nano-scale inorganic cementing material with high chloride ion penetration resistance and high sulfate corrosion resistance for marine and hydraulic engineering, and apreparation method of the cementing material. The composition of the cementing material comprises, in parts by weight, 50 to 90 parts of cement, 1 to 10 parts of silicon micro powder, 5 to 30 parts ofmineral slag micro powder, 5 to 10 parts of fly ash, and 1 to 10 parts of mineral fiber. The inorganic cementing material of the invention has a high strength increased by 50% to 70% compared with aconventional material, good chloride ion penetration resistance, excellent sulfate corrosion resistance, high impact resistance and good weather resistance, is a pure inorganic material, is non-toxic,odorless and harmless, and makes up for other defects of existing organic repair materials.

Description

technical field [0001] The invention relates to the technical field of construction materials used in marine and water conservancy projects, in particular to a micronano-scale inorganic gelling material with high resistance to chloride ion penetration and high sulfate erosion resistance and its preparation for use in marine and water conservancy projects method. Background technique [0002] At present, China's docks will have serious problems about ten years after they are built. The main reason is that it is subjected to the impact and wear of waves, ice impact, freeze-thaw cycle, alternating wet and dry, salt and chloride ion corrosion, etc., and the anti-corrosion measures of cementitious materials in construction materials are poor, which makes the above problems more serious. [0003] The cementitious materials used in foreign ocean engineering are mainly medium-heat or low-heat Portland cement with good corrosion resistance and appropriate amount of admixtures and mi...

AI Technical Summary

Problems solved by technology

First of all, due to the freeze-thaw cycle, the expansion stress becomes larger, and the structure cracks. Under the condition of long-term freeze-thaw cycle, large-scale spalling occurs; secondly, the impact and wear of waves cause concrete spalling

Third, the durability is poor, the maintenance cost is high, the durability and weather resistance are insufficient, the service life is short, and even a year or so needs to be repaired

The repair cost is high, and the maintenance cost is often more than 2 times higher than the construction cost.

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