GRC product production process

GRC is an abbreviation for Glass Fiber Reinforced Concrete in English. The Chinese name is glass fiber reinforced concrete.

The GRC product is a kind of fiber reinforced concrete composite material using alkali-resistant glass fiber as reinforcement material and cement mortar as matrix material. GRC is a material that expresses the designer's imagination through mold modeling, texture, texture and color.

Now GRC molds have cement molds, glass steel molds, wood molds, silicone molds, steel molds, and the surface finish is the best GRC steel mold.

Its data consists of the following parts

Cement: The cements commonly used in GRC include fast-hard sulphoaluminate cement, low-salt sulphoaluminate cement, general portland cement, and white portland cement.

Fibers: The fibers used in the GRC data must be alkali-resistant glass fibers. The types include alkali-resistant glass fiber rovings, alkali-resistant glass fiber chopped yarns, and alkali-resistant glass fiber meshes. European and American countries require that the content of glass fiber zirconia used in GRC be not less than 16.5%. China requires that the content of zirconia be not less than 16.5% when using ordinary portland cement.

Polymer: A generally added polymer is acrylic, ie an acrylate copolymer emulsion.

Admixtures: Generally, they can selectively participate in admixtures such as superplasticizers, plasticizers, retarders, early strength agents, antifreeze agents, rust inhibitors, etc.: When the product contains steel reinforcement materials or steel embedded parts No calcium chloride-based additives may be used.

Other information: It is possible to selectively increase some pozzolanic activity data, which will help improve the induction function of GRC products, such as strength, impermeability, and durability.

There are many types of reinforced glass fibers, such as chopped fiber yarns, continuous fiber rovings, grid cloths, chopped fiber mats, etc. Different types of glass fibers are incorporated into the cement matrix in different ways, the same type of glass The method of fiber incorporation into a cement matrix is not exactly the same. In addition, the incorporation of glass fiber and the application methods have a great influence on the mechanical properties of the composite materials of glass fiber reinforced cement.

This constitutes a variety of glass fiber reinforced cement composite material production process, such as the eruption process, premixed eruption process, pre-mixed casting process, injection molding process, cloth network technology, surround technology. Each production process has its own characteristics and is suitable for producing different products. Of course, the equipment used is also different.

1, eruption process

The eruption process is the earliest and most used method of producing GRC products, including craft eruptions and automatic eruptions. In the early 1970s, the British Building Research Institute (BRE) first used this method to make glass fiber reinforced cement (GRC) products.

Whether it is a craft eruption or a mechanical eruption, the eruption process requires specially trained operators and special equipment. The correctness of the operation method greatly influences the strength and durability of the GRC products. Regarding the eruption process, glass fibers are randomly distributed in cement mortar in two-dimensional random directions. The useful utilization of fibers is high, and the product's physical functions are also good.

2, premixed process

The premixing process is to stir the chopped glass fiber and the cement mortar matrix together to form a uniform glass fiber cement mixture, and then the product is made by casting or eruption. According to different molding methods, the premixing process can be divided into premixed pouring process and premixed eruption process. The premixed pouring process is similar to that of precast concrete products, and it is often accompanied by a sensational process during the pouring process.