JH-20 type concrete quick repair agent

1. Product introduction:
JH-20 concrete rapid repair agent is a new type of composite material based on inorganic materials. The product overcomes a series of shortcomings of traditional repair materials. It not only has the characteristics of rapid hardening and early strength, but also has small shrinkage, strong bonding with old concrete, wear resistance, durability, and convenient construction. It has the best performance and the lowest price in China. One of the cement concrete quick repair materials. The products are listed as key scientific and technological achievements promoted by the Ministry of Construction.
2. Scope of application:
The product is suitable for rapid repair of house structures, leakage repair of underground concrete structures, cement concrete pavements, municipal construction, airport runways, parking lots, ports, docks, concrete bridge decks, etc. Rapid construction of the project.
3. Reference dosage:
Based on the performance, JH series concrete quick patching agent is divided into JH-12 type and JH-20 type. The common dosage of JH-12 concrete quick repair agent is 13-18% of the cement dosage, which is 1/3 of the old product. The concrete prepared with 42.5 Pu silicon cement and JH-20 quick repair agent has a flexural strength of 3.0-4.0Mpa after 10-12 hours of molding, a flexural strength of 4.5Mpa for 24 hours, and the shear strength of the interface between new and old concrete can reach 80% of the overall shear strength of concrete. The repaired concrete has basically no shrinkage, and the color is basically the same as that of ordinary concrete, with no obvious difference.
The common dosage of JH-20 concrete quick patching agent is 14-18% of the cement dosage. The concrete prepared with 42.5# ordinary silicon cement and JH-20 type patching agent has good construction workability and is easy to vibrate. After tamping, the 1d flexural strength of concrete reaches 3.0-4.0Mpa. Concrete shrinks little and has the function of micro-expansion in the early stage. If the wet curing can be maintained for 1 day, the repaired concrete will produce a wet expansion rate of 2.44×1 cubic meter, thus generating a prestress of 0.2Mpa in the concrete, thereby enhancing the relationship between the repaired concrete and the concrete. Bonding of old concrete.
4. Packaging and storage:
This product is packed in a woven-lined film bag. Each bag weighs 50kg. Shelf life is one year. During the storage period, be careful to avoid moisture and exposure. It can only be used after passing the test after the expiry date.
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