What is a concrete spacer and why is it particularly important in Tehran?
Various spacers available for purchase in Tehran market
When you go to buy concrete spacers for construction projects in Tehran, you will come across a wide variety of models. Each of these models is designed for a specific part of the structure. Hyper concrete store as one of the most complete distribution centers, offers all these models with the highest quality.
1. Plastic spacers
These types of spacers are the most widely used type in the market due to their reasonable price, light weight and high variety.
- Floor spacer (hard fix and mini fix): These models are used for horizontal surfaces such as foundations, concrete slab ceilings and industrial floors. Load bearing capacity is very important in these spacers. For example, in heavy flooring where the rebar network has a lot of weight, the hard fix model must be used.
- Wall spacer (wheel fix or wheel): These spacers are similar to car wheels and are used for vertical surfaces such as walls, columns and circular sections. Their design is such that they have minimal contact with the mold and the concrete flows easily around it. The central lock of these spacers holds the rebar firmly and prevents it from moving during concreting.
- Double-fix spacer: It is used for ceilings and floors that have two rebar grids (upper and lower mesh) to maintain the exact distance between the two grids.
2. Concrete and cement spacers
Although plastic spacers are very popular, but in very sensitive projects such as dam construction, tunnel construction and hydraulic structures, it is recommended to purchase concrete spacer made of concrete itself. The reason for this is the same coefficient of thermal expansion of these spacers as the main concrete, which prevents the creation of small cracks around the spacer. Hyper concrete store also supplies all kinds of fiber concrete spacers with very high compressive strength for its special customers.
The vital role of concrete cover in the durability of the structure
When it comes to buying concrete spacers in Tehran, we are actually buying an insurance policy for the structure. The concrete cover or cover on the rebar has several important functions:
- Protection against corrosion: preventing water and chemicals from penetrating the steel surface.
- Protection against fire: Concrete acts as a thermal insulator and increases the resistance time of rebars against melting during a fire.
- Creating proper adhesion: The proper distance makes the concrete surround the rebar well and stresses are transferred properly. be.
In Iran's national building regulations (9th topic), the thickness of this cover is specified for different environmental conditions. For example, in foundations that are in direct contact with the soil, spacers of 5 to 7.5 cm height are required, while for internal ceilings, 2.5 or 3 cm spacers may be sufficient. Hyper concrete experts can guide you in choosing the exact size of the spacer based on the structural drawings.
Why shouldn't stone and ceramic be used instead of spacers?
Still, some traditional contractors use stone, mosaic or ceramic pieces to hold up the rebar instead of buying concrete spacers to reduce costs. This is a big and dangerous mistake.
The pieces of stone do not have exact dimensions and cause the concrete cover to be different in different places. Also, stone and ceramics do not have the necessary adhesion with concrete and cause cold seams and water penetration into the concrete slab. The cost of buying a spacer is very small compared to the costs of the whole project, but the damages caused by not using it can be billions. Therefore, buying concrete spacers for construction projects in Tehran is a smart investment, not an extra expense.
Guide to choosing the best spacer sales center in Tehran
Due to the high volume of construction in Tehran, many sellers are active in the field of construction materials. But why hyperconcrete store is the best option to meet your needs?
1. Quality of raw materials
Many of the spacers in the market are made from low-quality recycled materials that break and crumble when concrete is poured or workers walk on the rebars. Breaking the spacer means losing the concrete cover and all the reinforcement work. Hyperconcrete guarantees that all supplied spacers are made of first-class polymer materials (new materials or resistant engineered compounds) and have very high compressive strength.
2. Variety of products and warehouse inventory
In big projects in Tehran, time is golden. You cannot wait for the seller to source the material from another city. Hyper concrete store having a strong warehouse in Tehran, has the possibility to send all kinds of spacers in different sizes and models immediately. From 30mm spacers for joists to heavy duty spacers for tower foundations, everything is available.
3. Competitive price
With the elimination of middlemen and direct supply, the cost price for manufacturers is reduced. Purchasing concrete spacers from Hyper Concrete is highly economical due to competitive prices and special discounts for bulking projects.
4. Free technical advice
Choosing the type and number of spacers requires technical knowledge. Hyper Concrete's engineering team is ready to check your plans, calculate the exact number and type of spacers needed, and suggest to you to avoid additional or wrong purchases.
How to calculate the required number of spacers
One of the frequently asked questions when buying concrete spacers for construction projects in Tehran is the required number. This number varies depending on the type of structure, but the following empirical formulas can help:
- Heavy foundations and floors: Usually 4 Hard Fix spacers per square meter are recommended. Due to the high weight of the rebars and the traffic of the workers, the density of spacers must be sufficient.
- Concrete slab ceilings and block beams: on average 3 to 4 pieces per square meter.
- Walls and columns: For vertical surfaces, it is recommended to use 3 Wheel Fix (wheel) spacers per square meter of the surface of each side of the wall or column.
- Bears and columns Putters: 2 to 3 spacers (depending on the distance between the spacers) are usually used for each meter of length in beams.
Note that saving on the number of spacers can lead to bellying the reinforcements and reducing the concrete cover in the middle points. The experts of Hyper Concrete Store can make more accurate calculations based on the weight of the rebars you use.
Key points when installing spacers
After buying a concrete spacer, it is time to implement it correctly. Even the best spacers will not work if they are not installed correctly.
- Cleaning the surface: Before placing the floor spacers, the surface must be completely clean. The presence of dirt or gravel under the spacer can make it unstable.
- Complete lock: Make sure that the rebar is fully seated in the groove or lock of the spacer. The "click" sound in many plastic models is a sign of proper fitting.
- Regular distance: Place the spacers in an orderly and checkered manner so that the load distribution is uniform.
- Final check before concreting: The supervising engineer must check the condition of all spacers before issuing concreting permission. Any broken or bent spacer must be replaced.
The effect of Tehran weather conditions on spacer selection
Tehran has a relatively dry climate, but in the cold and rainy seasons, moisture can penetrate into the concrete. Also, the temperature difference between night and day can cause the structure to contract and expand. The plastic spacers offered at Hyper Concrete Store have good thermal resistance and do not lose their shape against temperature changes. Also, the materials used in them are neutral and do not have any harmful chemical reactions with cement compounds. This issue is doubly important for the projects that are implemented in the southern areas of Tehran with sulfated soils.
spacer online purchase; A quick and easy way
Fast delivery to all 22 districts of Tehran and even the suburbs (Karaj, Parand, Pardis, etc.) is one of the distinctive features of the services of this collection. Buying concrete spacers online not only saves you time, but also allows you to compare prices and specifications.
The importance of spacers in prefabricated structures
In Tehran, the use of prefabricated concrete parts (such as retaining walls, New Jerseys and facade parts) is increasing. Millimeter precision is important in the production of these parts. Any protrusion of the rebar will cause the part to be rejected by the quality control unit. Manufacturers of prefabricated parts are one of the main customers of buying concrete spacers. The use of special spacers that do not leave a mark on the surface of the concrete (invisible or needle-tip spacers) is the specialty of Hyperconcrete. We offer products that have the least effect on the exposed concrete surface after removing the mold.
The economic impact of using spacers on the project
It may seem at first glance that removing the spacer and using traditional methods saves money. But let's look more closely. If the concrete cover is not observed, the rebars will rust. Rusting of steel causes its volume to increase, and this increase in volume causes the surrounding concrete to explode (the phenomenon of concrete spalling).
The cost of repairing and retrofitting a damaged column or roof is hundreds of times the cost of purchasing concrete spacers for the entire project. In addition, the credibility of the manufacturer is severely damaged by the observation of cracks and premature failures. Therefore, buying a spacer from Hyper Concrete Store is actually an investment to preserve your capital and reputation.
New technologies in the production of spacers
The construction industry is always progressing and spacers are no exception. Today, composite spacers and height adjustable spacers have also entered the market. Hyper concrete store introduces the latest products to Tehrani manufacturers in sync with the world's technology. For example, some spacers have the ability to connect to each other to create a more unified surface, or models designed to be used on block joist roof monoliths so they don't sink into the monolith.
Frequently asked questions about buying spacers
1. What size spacer should we buy for block beam roof?
Usually, a spacer with a height of 2 to 3 cm is suitable for the thermal rebar on the block beam roof. Light models such as Minifix or Flatfix are good options that are available in Hyperconcrete.
2. Is the color of the spacer important?
Usually the color of the spacer does not indicate the quality of the material, but most quality spacers are produced in gray or white to match the color of the concrete. However, virgin material spacers usually have clearer and more vivid colors, while recycled materials are dark and dull.
3. What is the minimum order from Hyper Concrete?
Hyper concrete store sells both small (package) and wholesale (bags and tons) to meet the needs of all projects from small to large.
conclusion
The quality of a building depends on its details. No experienced engineer is willing to sacrifice the strength of the structure for a small and cheap part. Purchasing concrete spacers for construction projects in Tehran is an engineering necessity and a legal requirement according to national building regulations. These small parts are the main protectors of your investment i.e. expensive rebars.
If you are looking for quality, speed in delivery and reasonable price, Hyper concrete store is the first choice of construction industry professionals in Tehran. With a deep understanding of the technical needs of projects and construction challenges in the capital, we have assembled the best products. Contact us today for a free consultation and place an order and feel the difference in the quality of services and products. With hyperconcrete, keep the distances accurate and build with ease.
