Types of prefabricated concrete parts include products that are produced by pouring concrete into special molds and are transported from the factory to the project site after production for use. Mixing concrete as well as concreting at the project site is hard and exhausting work. Also, this process requires a lot of time, money and labor. But modular prefabricated concrete parts do not contain any of the above problems and are easy to implement. All kinds of prefabricated concrete parts are produced in Iran using the best and latest automatic machines and advanced equipment and have the necessary capability to ensure the security of various concrete structures.
Types of polymer precast concrete parts
Currently, polymer precast concrete parts are produced in various types, the most practical of which include the following.
Exposed concrete (polymer floor slab)
Exposed concrete or in other words polymer floor slab is one of the types of prefabricated concrete parts that these days are used for the interior and exterior of all kinds of buildings. It is widely used. These products are made in the form of panels and have a completely smooth and polished surface and high strength. Therefore, they can be used in different weather conditions.
The most important features of this category of precast concrete include easy execution and installation conditions, reasonable price, beautiful and simple appearance design, high execution speed and variety of designs and sizes. is The material required to make explorer concrete includes water, cement, resin for painting, sand, fine grain and additives. Also, manufacturers use fillers and lubricants in order to supply a suitable and installable product for and increase the strength of this type of prefabricated parts.
Explorer concrete is produced by a vibrator machine and because of the vibration that this machine produces during operation. creates, all the bubbles in it are destroyed. For this reason, the surface of first-class and high-quality exposed concrete is always completely smooth and polished, and no porosity or indentation is observed in it.
The benefits of prefabricated concrete pieces
The advantages of prefabricated concrete parts have made many contractors prefer to go for all kinds of prefabricated concrete parts instead of mixing concrete at the project site. Because the use of various types of prefabricated concrete parts play an effective role in increasing the speed of the project, and also their use leads to the reduction of construction waste and as a result, the costs required for the implementation of various projects.
On the other hand, all types of parts Precast concrete in Iran is produced in very favorable and standard conditions, and this factor has caused their use to increase the strength of the structure, along with other mentioned advantages. Sometimes the weather conditions and hot or cold weather causes the concrete pouring operation at the project site to be accompanied by various problems. Due to unfavorable weather conditions or stopping the implementation of the project, they prevent the implementation. Other notable benefits for precast concrete include safe bedding, aesthetics, and durability.
Production of prefabricated concrete parts
In order to start the production of parts, first the area or shed should be equipped with things such as batching or concrete mixer, crane (roof, tower crane, etc.), cement silo. , be equipped with steam, water, electricity, gas, etc. After equipping the workshop, the molds of the desired parts are made. These templates are either purchased ready-made or are made by an expert in the workshop. For example, in the production of Shadowline design, sheet is used to design its face, while for the production of concrete with a different face, it is possible to use silicone or other materials in the molds. After molding, the parts are reinforced by armature band and placed inside the molds. At this stage, the connections are made, spacers are used to create a distance between the reinforcements, and the hooks are also welded to the reinforcements.
The next step is concreting. According to the existing conditions, additives are also added to the concrete and the concrete is poured into the molds by a bag or a pump. After concreting, the curing stage begins with a steam machine. The pieces are arranged near the autoclave and covered with a tent; Then, the steam machine (autoclave) spreads steam with high pressure and this steam increases the rate of hydration and the concrete reaches the desired strength sooner. After steaming, the parts are removed from the molds with a crane and stored in a suitable place. After depositing, the concretes must be watered so that the hydration process does not stop and the strength of the concrete reaches a high limit.
Transportation of prefabricated concrete parts
In order to transport prefabricated concrete parts, according to the volume and number of parts, the type of transport device is selected. Parts are loaded on a trolley or other machines by overhead crane or tower crane or conventional cranes and are ready to be transported to the installation site. For example, for loading prefabricated concrete walls, a vault is used at the back of the car so that both their unloading is easy and the space is used optimally. Also, wood is usually used between the parts to prevent impact and crushing of concrete.
Installation of concrete parts
After transporting and unloading the parts to the work site, the installation operation begins. Before starting the installation, its infrastructure must be done. Depending on the type of parts, the infrastructures are also different, for example, the infrastructure for the installation of a concrete wall includes digging and pouring concrete, while the infrastructure for the installation of prefabricated concrete cornices includes iron drawing and preparation for welding behind the parts. After the implementation of the infrastructure, the installation of parts is done. The type of crane is selected according to the weight of the parts and the installation height.