GRC European style components are GRC building detail decoration components. Everyone knows that the strength of GRC components directly affects the beauty and quality of the project. What are the key technologies that affect the strength of GRC components, Baotou GRC Let's take you to understand:
1. Cement:
The cement for making GRC components mainly includes the following types: sulphoaluminate cement, Portland cement, Portland white cement
A. Sulphoaluminate cement products: quick drying cement, special cement
The characteristics are as follows: low alkalinity; Rapid drying type; The early strength of the product is good; The late strength of the product is poor;
B. Portland 42.5/52.5 cement products. The characteristics are as follows:
Strong alkalinity; Retarding type; The product has poor early strength and good late strength;
GRC European style components
C. Portland 52.5 white cement. It is suitable for producing colorful GRC, and its product characteristics are as follows.
It has all the characteristics of Portland 52.5 gray cement GRC products, but its cost is at least 35% higher than that of gray cement. Be able to distribute colors according to the needs, and the products are colorful. Colorful GRC does not need other colors, saving the cost and time of coloring, and the color durability is far more than paint.
2. Key technologies affecting the strength of GRC components
A. Mixing time: The length of mixing time shall be adjusted according to the temperature, water cement ratio and structural requirements. Once confirmed, it shall be strictly followed. Never rely on feeling. The length of mixing time has a direct impact on the strength of GRC components. The mixing time is quite different between adding water reducer and not adding water reducer. After adding water reducer, the mixing time is greatly shortened.
B. Fiber content: GRC mainly relies on glass fiber as reinforcement material. According to industry standards, the glass fiber content in GRC must reach 4-5% before it is qualified. However, it is difficult to reach this amount in actual operation. On the one hand, it is really not required so much, 3% - 4% is enough; On the other hand, the surface layer of the product generally does not need to add fiber. But if glass fiber mesh cloth is used instead of glass fiber yarn, the fiber content will be seriously insufficient, which will seriously affect the strength of the product.
C. Admixture: Admixture seems simple, but it is very important. The amount and variety of application greatly affect the product quality. In particular, Portland cement products need to increase the mortar. On the one hand, it can improve the strength and toughness of the product, on the other hand, it can make the product waterproof, salt resistant and acid resistant. (Primary admixtures: water reducer, fly ash, silica fume, pozzolanic ash, retarder, accelerator, acrylic emulsion, cellulose, etc.); Polycarboxylic water reducer is weakly acidic, which can reduce the alkalinity of cement, and then reduce the corrosion of cement to glass fiber.
GRC European style components
D. Manufacturing process:
At present, the main processes for producing GRC are eruption, mold erection and pouring, extrusion, slurry flow, and technical troweling. To ensure the product quality, it is necessary to use the high-pressure injection molding process, and the air pressure should be stable.
E. Sand: the silt content of sand will seriously affect the strength of cement components, and the requirement of high-strength GRC components on the silt content of sand is not more than 0.3%.
The key technologies that affect the strength of GRC components are the points mentioned above. The decoration of GRC components needs to follow the process details to ensure smooth decoration.
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