Article GRC

Article GRC

GRC (Glassfibre Reinforced Concrete) is also known as composite material (a mixture of concrete and fiberglass) is a type of fiber reinforced concrete. This product is also known as glassfibre reinforced concrete or GRC in the language of the international market. GRC is glass fiber concrete used in panels in building facades and as precast concrete. GRC is a composite material consisting of fine sand, cement, acrylic polymers, water, aggregates, and alkali resistant glass fibers.

GRC consists of high strength alkali resistant glass fibers that are incorporated in a concrete mixture. In this form, both fiber and concrete retain their physical and chemical identity and offer a combination of synergistic properties that cannot be achieved when the components work alone.

GRC is also easily formed into a variety of construction needs such as dome making, ornamentation, crowns, pillars, interior walls, ceiling coverings, roof traps, wind loops, and towers.


Strength of GRC Materials

In general, fiber is the part that holds the main load, while the surrounding concrete matrix stores it in the desired location and orientation, acting as a medium for transferring the load between fibers and protecting it from environmental damage. Fibers provide reinforcement for concrete and other functions in fiber-reinforced composite materials. Glass fibers can be incorporated into concrete matrices either in a continuous or intermittent arrangement.

GRC panels have a general appearance like pre-printed concrete panels, but differ in a number of significant ways. For example, GFRC panels, on average, weigh much lighter than pre-printed concrete panels and are thinner. Its low weight reduces the burden on the structural components of the building so as to make the construction of building frames more economical.


Advantages of GRC

As a new innovation building material, GRC has many advantages compared to other materials. Here are some of the advantages of GRC:

1. Aesthetics

GRC can give a look with nuances such as natural stone, architectural precast concrete, terracotta, wood or smooth panel form. This allows the designer more freedom in creating the shape, color, and texture of the material.

2. Design

Can be applied to almost all forms. GRC can be designed as wall panels, columns, reliefs, domes, columns, fireplace decorations, molds, medals and all types of GRC shapes.



3. Endurance

GRC can withstand weather erosion, including very cold weather. GRC is superior to conventional concrete. GRC is more resistant to rust than steel, it can even be used in salt water and underwater environments.

4. Environmentally friendly

GRC has a much lower environmental impact than conventional concrete, stone or other materials. Made with minerals: cement, aggregate and glassfibres. GRC is designed to be durable and environmentally friendly.

5. Fire Resistant

GRC is made from minerals and will not combust easily. In addition, the concrete properties are heat resistant despite high heat, GRC can protect the back material from fire and heat that can reach up to 140 ° C.

6. Light weight

GRC is thin but strong, weighing 80% to 95% lower than solid concrete. This makes it easier and faster to install and reduces the burden on building structures. Lighter weights and stronger materials also save transportation costs, and allow more design freedom. By using formulated materials, reducing the impact of environmental pollution, and the energy contained in buildings.

7. Strength

The GRC is strong and has proven its ability to withstand the burden of earthquakes and hurricanes. Strong means less chance for damage, easier to install, and durable.

8. Maintenance

GRC does not require special care as long as it is not exposed to extremely extreme conditions

Other benefits and advantages of GRC is that it offers unmatched flexibility with the ability to accurately reproduce any small or large design, including intricate patterns, fine details, complex shapes and curve materials. GRC can be resolved well in working on a wide-sized texture with a variety of color choices. This gives designers maximum ease of control over surface detail and final quality. GRC is available in integral cast colors and textures: chalk, precast, or finished with almost any paint.




If you don't know the term GRC or reinforced concrete fiber glass, Kubah GRC as a provider of manufacturing and installation of GRC applications, will explain it. Simply put, this is a special form of concrete with many applications. Material especially made as an alternative with the advantages of ease in making intricate ornament details, lighter weight than conventional concrete, good resistance to damage due to weather factors - fungal corrosion - abrasion, fast application, and relatively low cost.

GRC consists of fiberglass which is the main part and other materials as hardener mixed as forming. This is made by combining a mixture of fine sand, cement, polymers (usually acrylic polymers), water, other blends and alkali resistant glass (AR) glass. Many mixed designs are available online, but you will find that all the similarities are shared in the materials and proportions used.

1. Ability to Build Lightweight Panels - Although the relative density is similar to concrete, GRC panels can be much thinner than traditional concrete panels, making them lighter.

2. Has high pressure, flexural and tensile strength - High doses of glass fibers cause high tensile strength while high polymer content makes concrete flexible and resistant to cracking. Appropriate reinforcement using the guise will further increase the strength of objects and is very important in projects where visible cracks are not tolerated.

The glass fiber used in GRC helps to give this unique compound its strength. Alkali-resistant fibers act as the principle tensile load carrying members while the polymer and concrete matrix bind the fibers together and help transfer loads from one fiber to another. Without GRC fiber it will not have strength and will be more susceptible to damage and cracking.

GRC Casting

Commercial GRC usually uses two different methods for casting GFRC: spray and premix. Let's look at the two as well as more cost effective hybrid methods.


The application process for GRC Spray-up is very similar to shortcrete in a liquid concrete mixture that is sprayed into shape. The process uses a special spray gun to apply a liquid concrete mixture and to cut and spray long glass fibers from a continuous spool at the same time. Spray-up creates very strong GRC because of the high fiber load and long fiber length, but buying equipment can be very expensive.


Premix the short fiber mixture into a liquid concrete mixture which is then poured into a mold or sprayed. Spray guns for premix don't need fiber choppers, but they can still be very expensive. Premix also tends to have less strength than spray-up because of the fiber and is shorter and more randomly placed throughout the mixture.



One final choice for creating GRC is using a hybrid method that uses inexpensive hopper rifles to apply a face coat and a mixture of handpacked or poured supporters. The thin face (without fiber) is sprayed into the mold and the supporting mixture is then packed in by hand or poured in much like ordinary concrete. This is an affordable way to start, but it is very important to be careful about making both face and support mixes to ensure the same consistency and makeup. This is the method most concrete table makers use.

With the explanation above, the GRC should be considered as the use of the application for making and installing the mosque dome, as well as the mosque's tower, signposts list, loster or kerawangan, as well as the formation of interior and exterior ornaments of the room.

For further information about GRC, as well as the service for making and installing dome of mosques and minarets, please contact GRC Dome at telephone number: 0813-303-57581, 0878-820-58536, 021-9559-0744.




The dome of the mosque is a mosque building element with a distinctive semicircular shape which is usually located at the highest part as the roof of the building as well as architectural ornament which is the identity of the mosque where Muslims worship. Even so it is not mandatory that every mosque must use a dome and vice versa many non-mosque buildings use dome as architectural ornaments. . The dome architecture is so interesting, classic, and classy, ​​it doesn't fade with time.

Of the various mosque dome materials that we know, GRC dome is a type of dome that is quite popular at this time, especially to replace the mosque dome of reinforced concrete. The GRC dome is made from GRC (Glassfibre Reinforce Concrete) concrete material which is a concrete technology development that is a type of concrete fiber with fiberglass reinforcement. The superiority of GRC concrete properties is that it is lighter and resilient but remains sturdy so that it can be printed in the form of thin sheets that were previously not applicable to ordinary concrete.

      Here are some of the advantages of the GRC mosque dome in detail:

1. The process is faster

This is because the construction of the mosque's dome using GRC is shorter than the construction of the dome using concrete material. If using concrete, the construction takes about 2 months. But if you use GRC, we only need 1-2 weeks.

2. Costs needed are more efficient

Saving on manufacturing costs is one of the advantages of the GRC mosque's dome. This savings can be done because the dome making with GRC does not require much material and the process is faster. So that the remaining funds can be allocated for others.

3. Dome of the mosque with lighter GRC materials

This mild effect makes the mosque dome more effective. So it will not strengthen the foundation underneath. In addition, this is also because GRC consists of thin panel sheets.

4. More sturdy

This GRC dome is no less resilient to concrete. Even more resistant to extreme weather and impact resistant.

5.Longer lasting

The GRC dome will last decades, just like a concrete dome.

6. More precision

The advantages of the GRC mosque dome are related to the shape of the dome mold. GRC dome is more orderly because it is molded with molding. Unlike the concrete dome which is printed with formwork.


7. More flexible

The variety and motifs of the GRC dome are more numerous and varied. So that the shape is more flexible.

8. More guaranteed

The quality of materials and the making of the GRC dome is more guaranteed because it is overseen by experienced personnel.

9. Easier

The ease of making this GRC dome is obtained starting from bolting, installing, maintaining and repairing it.

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