Plastic formwork is a product with characteristics of energy-saving and environmentally friendly. It is one of the directions for the development of the construction industry in the future.
Plastic formwork is made of fiber high-strength plastic. When the raw materials are in the molten state, the plastic formwork is single molding shaped with shooting technique. Plastic formwork has advantages of simple craft, lightweight, low cost, and circular use. It has the same mechanical properties as the steel formwork. Plastic formwork has a broad development prospect as it can replace the steel formwork in the construction industry for most purposes.
Below we will make a comparison between plastic formwork and steel formwork as shown below.
Steel’s tensile strength is 375~460N/mm², yield point 220N/mm², tensile elongation rate 20%~26%. While high strength plastic material strength is 181N/mm², lower than the strength of steel. But we can increase the thickness of the plastic formwork to improve its strength and bending resistance.
2) Production process
Steel template starting from the cutting plate blanking has more experience working procedure: shear, bending, qing Angle, punching, cutting, plate making, cutting Angle calibration, paint, welding, etc., to use to the porous or large shearing machine, bending machine, hydraulic punching machine, Angle machine, wheel correction machine, welding machine, and much other equipment and operating personnel, this also is the main reason for the steel formwork is expensive. But plastic formwork can be made individually by one person and one machine, cooled by a single injection molding, and are much simpler to make from the point of view of technology.
3) Cost and price
The steel formwork uses Q235 steel as raw materials, which need to be processed through many processes. Its cost is relatively high. While plastic formwork uses ordinary plastic as raw materials, whose cost is lower than steel formwork. Using plastic formwork can greatly reduce the cost of circulating materials and engineering construction.
Due to the nearly same thermal expansion coefficient of steel and concrete, the formwork and the new pouring concrete will be firmly bonded together, making the de-mold work difficult. While the plastic formwork is different, due to its totally different thermal expansion coefficient and concrete, after casting, with the rising temperature and the solidification of concrete, the plastic formwork will automatically from with the casting of concrete, gently remove it without a knock.
Due to the good plasticity of plastics, different shapes and specifications of formwork can be produced by changing the mold form according to different requirements to meet the needs of different parts and different strengths in the building. The damaged formwork can be recycled and remelted into new formwork with good recovery performance.
It can be seen that the formwork made from high strength plastic mixed fiber is feasible in terms of technology, structure performance, and cost price.
There are many customers often ask us a question about the differences between hot rolled steel coil and cold rolled steel coil. Today we will have a discussion about that.
The hot rolled steel coil and the cold-rolled steel coil, they only have one difference in the word. So what’s the difference between hot rolled steel coil and cold rolled steel coil?
There are some primary differences between these two types of steel coil. These differences are related to the ways they are manufactured or something about the manufacturing technique. The difference between hot rolled steel coil and cold rolled steel coil is not about the product specification or grade.
Introduction of Hot-Rolled steel Coil
Before the introduction of hot rolled steel coil, I want to introduce hot rolling, the manufacturing technique of hot rolled steel coil to you.
Hot rolling is a metalworking process in which metal is heated above the recrystallization temperature to plastically deform it in the working or rolling operation.
Hot rolling is a process used to create shapes with the desired geometrical dimensions and material properties while maintaining the same volume of metal. The hot metal is passed through the two rolls to flatten, lengthen, reduced the cross-sectional area, and obtained a uniform thickness.
Hot rolling can improve the performances of the metal, such as toughness and strength, ductility, resistance to vibration and shock, formability, weldability.
Introduction of Cold-Rolled Steel Coil
Cold rolling is a process by which the sheet metal or strip stock is introduced between rollers and then compressed and squeezed. The amount of strain introduced determines the hardness and other material properties of the finished product.
The advantages of cold rolling are good dimensional accuracy and surface finish.
Cold rolled steel is processed further in cold reduction mills, where the material is cooled followed by annealing and/or tempers rolling. The cold reduction process will produce steel with closer dimensional tolerances and a wider range of surface finishes. The term cold rolled is mistakenly used on all products, when actually the product name refers to the rolling of flat-rolled sheet and coil products.
As the building construction volume continues to increase, the huge scaffolding group is likely to exist several kinds of safety hazards at the same time, a lot of accident signs, are caused by some reinforcement measures are not in place.
So what are some of the issues that need to be addressed?
1 Settlement of foundation will cause local deformation of scaffolding. In order to prevent local deformation caused by collapse or toppling, set up on the horizontal section of the double row of peak or scissors, set up a group of a vertical pole, until the deformation area outside the row. Scissor or scissor legs must be set on a solid, reliable foundation.
2 The deflection of the cantilever steel beam on which the scaffolding relies exceeds the specified value, the anchorage point after the cantilever steel beam shall be strengthened, and the steel beam shall be supported by steel support and U-shaped support after being tightened to support the roof. There is a gap between the embedded reinforcement ring and the steel beam, which must be tightened with a horse wedge. Hanging beam outside the wire rope by root examination, all fastening, ensure uniform stress.
3 scaffolding unloading, pull up the system local damage, immediately according to the original program of unloading pull up the method will be restored, and has produced deformation of the parts and rods to correct.
Timely correct the deformation of the scaffolding outward stretching, do a good job of rigid pull, and the unloading point wire rope tightening, so that its stress uniform, finally release chain.
4 In order to avoid scaffolding accidents, in addition to safety inspection, ensure that scaffolding is erected to meet safety requirements, so as to avoid scaffolding accidents to the maximum extent.
5 scaffolding shall be constructed in accordance with the requirements for the formation of basic framework units, i.e. row by row, span by span, and step by step. The scaffoldings around the rectangle shall be constructed from one corner and extended outward step by step, so as to ensure the stability of the constructed parts.
6 When scaffolding is constructed in the presence of a construction layer of jointing parts, jointing parts shall be installed immediately after the erection of the vertical column, horizontal rod, and vertical horizontal rod at that point.
7 Steel pipes with different outside diameters shall be mixed in the erection of the posts, nor shall the docking fasteners of adjacent posts be placed in the same height. The staggering distance shall meet the structural requirements.
8 The horizontal support and scissors' support shall be constructed synchronously with the horizontal bar and vertical column, and the distance between the centerline of the transverse support, scissors support, and other fasteners shall not be greater than 150mm from the main node.
9 The spacing between one end of the wall and the decorative surface of the wall shall not be greater than 100mm in double row scaffolding.
Scaffolding is an essential facility in construction projects. While the scaffolding collapse and falling accident happened frequently in the construction industry in recent years.
There are many reasons that cause scaffolding collapse and falling accidents, such as nonstandard scaffold erection, scaffold loading overweight during the construction work, arbitrary removal of the pull or stress bar, etc. Therefore, it is very important to strengthen the safety of scaffolding construction management.
Then how can we distinguish the omen of the scaffolding collapse? There are three kinds of scaffolding collapse.
Vertical Scaffolding Collapses
1) An early sign of vertical collapse is the beginning of lateral arch deformation in the lower part of the frame and in the long vertical rods, which is visible to the naked eye but easy to ignore.
2) A medium-term sign of vertical collapse is when the vertical bars begin to show significant multi-wave arch deformation from the bottom up, with signs of damage at scaffold joints and joints.
3) The last sign of vertical collapse is when scaffolding begins to make unusual noises about joint and wall failure, and some scaffold joints and joints can be severely damaged.
Partial Scaffolding Collapse
1) The early sign of partial collapse is the scaffold of the local horizontal rod and foot hand plate obvious bending deformation and damage, at the same time in the scaffold local joint will appear cracks or loose sliding, which is visible to the naked eye but easy to ignore.
2) The intermediate sign of local collapse is to continue the damage characteristic of the earlier symptom and continue to develop, and the crack of the connector expands or slides seriously, and part of the connector begins to deform.
3) The late signs of partial collapse are the beginning of breaking or falling off of footplates and horizontal rods, and the beginning of severe deformation of the partial structure with abnormal noise.
Scaffolds Collapse and Multilayer Transport Trestle Racks Toppling
1) An early indication of toppling is when the foundation of the pole on the side of the scaffolding begins to settle; Scaffolding pole tipped slightly to the side of the transfer frame; There are initial tension and compression or shear deformation in the jointing parts.
2) The intermediate sign of dumping is the continuation and development of the damage characteristics of the earlier signs, and the upper part of the frame begins to shake, and in severe cases, the root of the upright pole will obviously deviate from its supporting cushion or position.
3) A late sign of toppling is a sharp outward topping of scaffolding, accompanied by an abnormal sound.
Concrete is one of the most popular building materials as it’s safe, durable, sustainable, and economical. Formwork is an essential material used in concrete construction. Formworks are temporary or permanent molds that cannot be removed until the concrete is shaped into the designed structure.
There are many types of formwork used in concrete construction.
Timber formwork is one of the earliest types of formwork. It is typically built on-site and while it is easy to produce. But it has a shorter service life. The installation of timber formwork is very time-consuming. Today, timber formwork is still used in countries where labor costs are low.
Aluminum Formwork System
This type of formwork is built from prefabricated modules with a frame typically made from aluminum alloy. In comparison to timber formwork, the Aluminum Formwork System can be constructed much faster (using pins and clips) and has lower costs since it can be reused thousands of times.
Plastic Formwork System
As the name suggests, this type of formwork is made from lightweight and robust plastic. This type of formwork is an excellent choice for small but repetitive construction projects, such as low-cost housing estates. The plastic formwork system has many applications in the construction industry.
As we have known, there are two types of Submerged Arc-welding Steel Pipe: LSAW steel pipe and SSAW steel pipe.
LSAW Steel Pipe
Longitudinal Submerged Arc-Welding Steel Pipe, abbreviated to LSAW Steel Pipe, also had an abbreviation of SAWL steel pipe.
For manufacturing the LSAW steel pipe, ADTOMall taking the steel plate as raw materials. Then molding the steel plate by the molding machine, welding the molded steel plate by the double-sided submerged arc welding technology. After the process above, the LSAW steel pipe will get excellent ductility, weld toughness, uniformity, plasticity, and great sealing.
The LSAW steel pipe has been widely applied in the oil and gas pipelines, which especially required large diameter and thick wall pipe with high strength and long-distance. At the same time, in construction structures that need tough strength, water treatment, thermal industry, bridge building, etc., the LSAW Steel Pipe is popularly used. According to API specifications, the LSAW steel pipe or SAWL steel pipe or JCOE steel pipe is specially designated in large-scaled oil and gas transportation, in the cases that pipeline across the city, sea, and the urban area.
SSAW Steel Pipe
Spiral Submerged Arc-Welding Pipe, abbreviated to SSAW Steel Pipe, also called HSAW pipe (Helical SAW) as its welding line shapes like a helix. SSAW steel pipe using the same welding technology of Submerged Arc-Welding as the LSAW steel pipe. The only difference is SSAW pipe is spiral welded while the LSAW is longitudinally welded.
For oil and gas pipeline systems, but in petroleum design specification, the SSAW steel pipe / HSAW steel pipe could only be applied in construction structure, water transport and sewage treatment, thermal industry, buildings, etc.
Ringlock Scaffoldingis one type of modular scaffolding system. It enables ringlock scaffolders to assemble, use, and disassemble the scaffolding system. Ringlock scaffold is a temporary supporting structure that can be erected speedy and efficient. Therefore, using ringlock scaffolding can save time and labor costs. Ringlock scaffolding system is one of the most sophisticated and complete scaffolding systems on the market.
With the special ringlock scaffolding components: ringlock standard with spigot and ringlock scaffolding plank. Ringlock scaffolding has been designed to keep components minimal to allow for easy erection and dismantlement. A single rosette sits at the core of all ringlock scaffolding components. With a built-in safety mechanism and high load capacity, the ringlock scaffolding system is a popular choice in different kinds of applications.
Ringlock scaffolding system is an ideal structure with complex elevations and shapes. Where angular flexibility is imperative, the ringlock scaffold always delivers. It is designed in less spare parts so it requires minimal space for storage. Ringlock scaffolding system is used for supporting and erecting access structures in the construction industry, offshore construction, industrial maintenance, and shipbuilding.
At the heart of the ringlock scaffold is a single rosette that allows up to four braces and four horizontals to be attached to it with the simple use of a hammer. Ringlock scaffolding can be recycle used.
ADTOMall, the ringlock scaffolding manufacturer based in China, supplies high-quality ringlock scaffolding for sale. For more information about ringlock scaffolding for sale and other types of scaffolding, please don’t be hesitate and just contact us.
ADTO GROUP is a well-established scaffolding system distributor throughout the world. As a leading professional scaffolding manufacturer in China, ADTO GROUP provides scaffold wholesale service and construction materials for one-stop services. With its self-owned scaffolding & formwork factory, it directly supplies wholesale scaffolding and formwork at a favorable price.
Kwikstage scaffolding, also named kwikstage scaffolding system, is a widely used quick erected and disassembled scaffolding system all over the world. Kwikstage scaffolding is featured with high efficiency, well-adaptability, and fast-erection. Aluminum Kwikstage Scaffolding is a kind of durable scaffolding system. It is made of aluminum alloy.
Aluminum Kwikstage scaffolding is made up of aluminum scaffold tube, kwikstage standard, and kwikstage scaffolding frame. Aluminum scaffold tube has the advantages of anti-corrosion and anti-rust as the aluminum alloy is not easy to be oxidized. Kwikstage standard and scaffolding frame are specially designed standard tubes with kwikstage spigots. The aluminum scaffold tube, combined with kwikstage standard and scaffolding frame, are the vital scaffolding parts of kwikstage scaffolding.
ADTO GROUP offers scaffold wholesale service and other construction materials one-stop service. It has many types of scaffolding. Among these scaffolding types, ringlock scaffolding and kwikstage scaffolding are the star product of ADTO GROUP. ADTO GROUP also supplies aluminum scaffold tube and SGS standard frame scaffolding. Any demands of scaffolding and formwork, please don’t be hesitate to contact us.
There are several requirements that the formwork system needs to meet, otherwise, it would not serve its purpose adequately. In order to make sure that the formwork system fulfills its design goals, the designer and site engineer should take technical, functional requirements of the formwork into consideration.
Technical Requirements of Formwork System
1 The Aluminium formwork must not damage the concrete edge or surface; or themselves during removal from the structure.
2 It should be carefully selected for the required finish surface and linings to produce the desired concrete surface.
3 The formwork must not damage the concrete edge or surface; or themselves during removal from the structure.
#4 Formwork should be of the desired shape, size and fit at the location of the member in the structure according to the drawings.
5 Panels of the formwork should be tightly connected to minimize the gap at the formwork connection to prevent leakage of cement paste.
6 Formwork needs to withstand the pressure of fresh concrete and working loads and should not distort or deflect from their position during the concrete placement operation.
Functional Requirements of Formwork System
1 It should be dismantled and moved as easily as possible.
2 Formwork should be as lightweight as possible without any strength reduction.
3 Simplicity in erection is another valuable functional requirement of formwork.
4 Formwork shall be designed such that it fits and fastens together with reasonable ease.
5 Formwork sections should be sized in a manner that can be lifted and transported easily from one job site to another.
6 Interchangeability of formwork units is another functional requirement. This enables units to be used for forming different members.
Formwork is a kind of molds used to shape the freshly poured concrete or some other similar materials. It is widely used in the construction industries. With the hundreds of years developing, formwork has been developed from timber formwork to metal formwork (in this passage, we will talk about steel formwork and aluminum formwork), and plastic formwork. In our modern society, metal formwork and plastic formwork are mostly used in construction projects. Today, we are going to talk about something about the modern formwork system classification.
The metal formwork can be divided into steel formwork and aluminum formwork.
Steel is a perfect material for making formwork because it will never bend or warp while pouring concrete. Steel formwork can store a large amount of concrete. Steel is unyielding which makes it non-adherable with concrete. It is possible to stack steel plates for making taller structures.
Compared to steel, aluminum alloy is a better material for making formwork. While the so-called aluminum formwork is not made of aluminum but aluminum alloy. Aluminum formwork is a fast, simple, adaptable, and very cost-effective formwork system. With the rust-resistant and corrosion-resistant aluminum alloy, aluminum formwork has a longer service life than steel formwork.
The plastic formwork is an advanced formwork system. As the name suggests, plastic formwork is made from a lightweight and robust plastic that creates interlocking and modular formwork systems. Plastic formwork is an excellent choice for repetitive construction projects, such as low-cost housing estates. Reusable plastic formwork has many advantages, such as clean surface treatment, lightweight, and cost-effective. Considering that the panels are made from plastic, plastic formwork does not require professional formwork removing workers and are simply cleaned with water.
Those are the contents of the modern formwork classification we talk about today. So if you have any need for formwork purchasing, which kind of formwork do you prefer? Just contact us, and we will give you the best quotation.