What is GRC?

The question of what is grc has been the first question of everyone who is interested in precast concrete facade cladding. Its technical name is “Glass Fiber Reinforced Concrete”. It consists of the initials of the English description. Glassfibre is called GFRC or GRC, the first letters of the words Reinforced Concrete. It is also called precast. GRC is a special type of concrete created by adding special additives to the concrete. Steel is used as reinforcement in standard concrete. In GRC precast concrete structural elements, alkali resistant glass fiber is used instead of steel. In this way, it is protected from corrosive effects. In addition, the resistance of concrete against tensile and pressure is increased.

What components does the GRC consist of?

It is produced with the desired durability with many components. Gfrc (Glassfibre Reinforced Concrete) basically consists of 4 main components. These are white portland cement, silica sand with high silica content, glass fiber with high alkali resistance (16.5% and above Zirconium content) and water. According to concrete element dimensions, plasticizers and other chemicals are also used to provide physical properties.

What is GRC? How is it produced?

There are two types among the construction methods, these are premix and spray systems. GRC should be named as premix if the prepared mixture is poured into the mold, and as spray if sprayed. Generally, the premix method is chosen when all of the grc precast concrete structural elements to be produced are required to be full. In order to reduce the weight of the material in surface movements over 4-5 cm, production is made by spray method between 12-16 mm.

Mold Types Used in GRC

Generally, three different mold types are used. These are wooden, polyester and silicone molds. The mold type is determined according to the number of castings and the decorativeness of the mold. In addition, effective use of molds (high number of castings per mold) plays an important role on the price, as it will reduce costs per production.

What is GRC? Connection Types

Static calculations are made for grc precast facade coatings planned to be produced. As a result, carcass or pad production is made. In particular, the pad is generally used in situations that are small and do not allow a metal construction infrastructure. However, in both connection types, it allows earthquake loads to be absorbed in the panel by using Q8 steel bars called flex bars. In addition, in the carcass system, there is a box profile on which the pads are fixed by welding. Halfen c channel is welded on the box profile and connection to the main construction is made with L anchors.

During welding, high heat is generated and material loss occurs on the surface of the profile being welded. In addition, high temperature causes the water in the steel to decrease and the material to become brittle. FIBERTON A.S. does not use box profiles smaller than 2.5 mm in their carcasses.

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