1. What is the plastic ceiling block?
Plastofoam ceiling blocks, which are mostly known as ceiling unolith, are considered a suitable alternative for heavy cement blocks today. This type of roof block, which is mostly used in roofs due to its light weight, especially in the execution of the Unolit beam roof. Plastofoam or polystyrene ceiling block is resistant to earthquakes and atmospheric factors by reducing the amount of load on the roof of the building, and it has good acoustics.
Plastofoam ceiling blocks are produced in standard sizes according to the labor market and firefighting standards, and its implementation also requires expert people. The most important reason for the popularity of the plastofoam block is its affordable price and standard features, in addition to the light weight of this type of ceiling block. The structure of plastofoam or polystyrene is with styrene monomers, and one of the most characteristic features of this material is the distribution of molecular weight under polymerization conditions. To put it simply, this material is resistant to water and moisture.
2. Types of plastic ceiling blocks (polystyrene)
Plastofoam ceiling blocks are one of the types of polystyrene used in the industry and are divided into three categories.
Crystal polystyrene ceiling blocks
Crystalline polystyrene has high tensile and bending strength, it is also most used in injection molding.
This model is also used in the production of disposable containers, packaging industry, and pharmaceutical and health industries.
Among the advantages of this model can be mentioned the reasonable price, high rigidity and resistance to gamma rays.
Expanding Polystyrene ceiling blocks
This model is the block that we deal with the most, and in the production process of this product, white foam is obtained.
Expanded plastofoam ceiling block has properties such as low weight, no heat transfer, invisible moisture absorption, high impact resistance inside its structure.
This type of polystyrene ceiling block is often used in building insulation.
. Impact -resistant polystyrene ceiling blocks
This plastofoam block model is usually used in the production of household and electrical appliances, TV frames, and sports equipment, and as its name suggests, it has high impact resistance.
This type can be painted and is easily molded.
Ceiling block for metal joke ceilings
This type of ceiling block (Roof Unolite) is used in the process of implementing ceilings that are based on metal beams (chromite).
The dimensions and specifications of the chromite ceiling block are also described in the table below.
Weight (grams) Height (cm) Width (cm) Length (cm)
1200 25 65 100
1200 30 65 100
Ceiling block for concrete joists
In the process of implementing roofs that are based on concrete beams, this type of roof block (ceiling monolith) is used to lighten the weight of the roof and speed and ease of its implementation. The dimensions and specifications of this type of block are described in the table below.
Weight (grams), height (cm), width (cm), length (cm)
1200 25 50 200
1200 30 50 200
Benefits of plastic blocks
These materials are used to create a layer called thermal insulation. In this way, the plastofoam blocks are placed and then their empty space will be filled with concrete.
The use of these blocks is cost-effective and does not harm the environment, because they can be recycled.
These blocks are very good sound insulation and as a result, they will save energy and costs by reducing the required energy consumption.
Plastofoam blocks are more affordable than cement and concrete blocks.
The use of plastofoam blocks reduces the consumption of concrete, beams and steel in the building, and due to their light weight, they reduce about 30% of the volume of concrete.
Plastfoam blocks are environmentally friendly and 100% pre-recycled.
Due to the light weight of plastofoam blocks, fewer concrete beams are needed and the building will be naturally insulated.
Plastofoam blocks are resistant to vibration and decay and do not contain any ozone-depleting substances such as CFCs.
They have good resistance to wind and storm.
Due to the fact that using this material reduces the weight of the structure and ultimately reduces the dead load of the building, it will also reduce the amount of energy absorbed by the building during an earthquake.
Due to the unique characteristics of plastofoam blocks, multi-story buildings can be built faster and cheaper than multi-story buildings with ordinary bricks.
These blocks can be used in office, residential, commercial or industrial projects. Saving money and time is very important in any construction project.
With the help of these materials, in addition to increasing the construction speed, costs will also be saved by reducing the required labor and reducing the concrete consumption.
Important Tips on Plastic Blocks
These blocks should be placed in the workshop and away from any flammable materials such as paints, solvents or flammable waste.
The storage area of plastofoam ceiling blocks must be free of any possibility of falling or contact with hot shavings or sparks from welding.
It is better for the warehouse to be far away from the construction site in order to prevent a possible fire in the warehouse in case of fire.
It is better to avoid storing blocks with a volume higher than 60 cubic meters.
All workers and employees should pay attention not to use any kind of flame such as cigarettes in the warehouse.
Be sure to keep a number of fire extinguishers near the warehouse.
Ceiling plastic plastofom standard
The ceiling plastofoam standard refers to the instructions that have been compiled about the physical, chemical, mechanical, production, design and dimensions of ceiling plastofoams. As with any other construction product, global standards and guidelines must be followed for the production of ceiling plastofoam. ASTM ceiling plastofoam standard with code E2430 is used to produce all kinds of ceiling plastofoam panels. According to the approval of the standard institute, the use of standard ceiling plastofoam block should be used for molding inside T-shaped beams and also the bottom mold in in-situ concreting, not as a material that increases the strength of the building. However, the ceiling plastofoam blocks must be able to withstand the shocks caused by conventional transportation and the forces caused by traffic during concreting. Ceiling plastofoam blocks are produced in two types with grooves and without grooves on the bottom. According to the emphasis of the Standard Institute, the expanded polystyrene products used in the building must be self-extinguishing or slow-burning in terms of fire resistance, and if exposed to fire for 15 seconds, the flame advance in 20 seconds should be less than 150 mm. be Also, on all plates and blocks of standard plastofoams, the mark or brand name of the manufacturer, type, dimensions and date of production must be written. In the text of the national standard for standard ceiling plastofoam blocks, the technical aspects of how to use these blocks in the ceiling of the floors are specified. Among other things, in order to protect the standard ceiling plastofoam block and prevent any possible fire from directly hitting the block, it is necessary to protect under the roof with a suitable cover. The cover must be connected and restrained to the beams and joists. Direct connection to standard ceiling plastofoam block (such as plastering directly on the block without using mechanical connections) alone is not acceptable. Also, the direct connection of the cladding to the block with any geometric shape (whether normal or with various grooves) alone and without the use of mechanical connections is not allowed in any way, and it is necessary to use mechanical connections restrained to beams and beams (such as the Rapites system). br>
