Corrosion-resistant freeze-thaw resistant mortar and preparation method thereof

Abstract

The invention provides corrosion-resistant freeze-thaw resistant mortar which is mainly composed of powder and emulsion according to a mass ratio of (4-6):1. The powder comprises the following components in parts by weight: 300-400 parts of cement, 400-500 parts of coarse sand, 100-300 parts of fine sand, 1-2 parts of a water reducing agent, 3-8 parts of an expanding agent, 1-2 parts of an antifoaming agent, 1-3 parts of HPMC (Hydroxy Propyl Methyl Cellulose), 1-2 parts of starch ether, 1-2 parts of a water repellent, 1-3 parts of polypropylene fibers, 1-2 parts of hollow fibers and 30-50 parts of rubber powder; and the emulsion comprises the following components in percentage by weight: 20-30% of cationic chloroprene emulsion, 20-30% of vinyl acetate-ethylene copolymer emulsion and the balance of drinking water. The preparation method comprises the following steps: respectively preparing the powder and emulsion, and uniformly stirring and mixing according to a certain ratio, thereby obtaining the product. The corrosion-resistant freeze-thaw resistant mortar disclosed by the invention has dual performances of corrosion resistance and freeze-thaw resistance and is worthy of wide popularization and application.

Description

technical field [0001] The invention relates to the field of construction, in particular to an anti-corrosion anti-freeze-thaw mortar for construction and a preparation method thereof. Background technique [0002] Cement, powdery hydraulic inorganic gelling material. After adding water and stirring, it becomes a slurry, which can be hardened in the air or better hardened in water, and can firmly bind sand, stone and other materials together. In the early years the mixture of lime and volcanic ash is very similar to lime pozzolanic cement, use it to glue concrete which made of crushed stone. After hardening, the cement not only has high strength, but also can resist the erosion of fresh water or salt water. For a long time, as an important cementing material, it is widely used in civil engineering, water conservancy, national defense and other projects. [0003] However, due to the low compressive ratio, low compressive ratio of ordinary concrete, poor impermeability, crac...

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Problems solved by technology

[0005] In the prior art, in the application of water conservancy projects, the concrete dam body needs to pass water for a long time, and severe freeze-thaw erosion occurs; there is a certain acid-base corrosion situation; there are acid mist, salt mist and other corrosive gases in the air from time to time. The fog causes persistent damage to the dam body; in addition, the ultraviolet radiation lasts for a long time, and the damage caused by wind, sand, rain and snow accumulates over time

The maintenance of water conservancy projects where various diseases gather together cannot be solved at all with traditional anti-corrosion mortar materials.

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