FAQ

PVC concrete formwork indeed has high versatility in the construction field. As a mature new type of energy-saving and environmentally friendly building material, it has been widely applied in various construction projects.

Specifically, its versatility is reflected in the following dimensions:

1. Wide range of applicable engineering fields
PVC concrete formwork can cover almost all concrete pouring scenarios, including but not limited to:
Conventional building construction: cast-in-place concrete structures such as floors, walls, columns, and beams in high-rise residential buildings and large public buildings.
Infrastructure: projects such as bridges, railways, highways, comprehensive utility tunnels, and tunnels.
Special environments: due to its excellent waterproofing, moisture resistance, and acid-alkali corrosion resistance, it is particularly suitable for underground projects, water tanks, water conservancy projects, as well as humid and corrosive environments such as coastal areas and mines.

2. Versatility in construction and shaping
The physical properties of PVC formwork make it very \"versatile\" on construction sites:
Easy processing: its processing methods are very similar to traditional wooden formwork. Workers can use ordinary carpentry electric saws for cutting, and can also freely saw, plane, drill, and nail. This means that construction teams do not need to replace their entire set of tools or relearn complex processes to use it directly.
Flexible shaping: in addition to conventional flat formwork, PVC formwork has certain flexibility and toughness, allowing it to be processed into various geometric shapes at will, and can even be used for formwork of curved irregular buildings or curved walls.
Good demolding effect: its surface is extremely smooth, so concrete does not stick to the board surface, making demolding easy with (or without) demolding agents. The surface of the poured concrete is flat and smooth, achieving the effect of \"清水混凝土\" (exposed aggregate concrete), thus eliminating the need for subsequent secondary plastering processes.

3. Versatility in economic turnover
Compared to traditional wood plywood which can only be reused 5-10 times, PVC building formwork has extremely strong durability, with normal turnover times usually reaching 30 to 100 times or more (some high-quality products can even reach 80-100 times). Although its single purchase cost is higher than that of wooden formwork, the long-term cost per use is very low when spread out. Additionally, waste boards can be 100% recycled and reprocessed, meeting the requirements of green construction.

1. Waterproof and moisture-proof: PVC material itself does not absorb water and will not be deformed by moisture even in humid environments such as basements and pools.

 

2. Easy demoulding: After the concrete is poured, the surface is smooth and not easy to stick to the board. It can be easily demoulded without applying a release agent. The surface of the demoulded concrete is highly smooth and can even achieve the effect of fair-faced concrete, eliminating the need for secondary plastering.

 

3. Light and easy to install: It is very light in weight (density is about 1/8 of the steel formwork), which makes it very labor-saving for workers to carry and operate, which can greatly reduce labor intensity.

 

4.Strong processability: It retains the secondary processability similar to wood, and can be sawed, planed, drilled, and nailed at will, and can easily cope with the formwork requirements of various special-shaped structures.

5.Stable performance: After modification, high-quality PVC formwork has good strength and toughness, can be constructed normally in a wide temperature range (such as -20°C to +60°C), and is not easy to crack or soften.6. Strong adaptability: It also has properties such as flame retardant, acid and alkali corrosion resistance, and insect-proof (rat-repellent and insect-proof). Ultra-high turnover times: Traditional wooden formwork is generally scrapped after 3-5 times of turnover, while.7. PVC building formwork can usually be turned over more than 30-100 times under normal use, and some high-strength products can even reach nearly a hundred times.

 

8. Reduce the comprehensive cost: Although the initial single purchase cost of PVC formwork may be higher than that of wooden formwork, with its ultra-high reuse rate, plaster-free and labor-saving features, it can significantly reduce the comprehensive cost of the project in the long run.

Hollow formwork (especially polypropylene PP hollow plastic formwork) is widely used in modern construction due to its lightweight yet high-strength characteristics, high turnover rate, and environmental benefits. Based on current construction practices, its primary applications can be summarized into the following categories:

1. Load-Bearing Walls and Slabs in Cast-in-Place Concrete Structures

This is one of the core application scenarios for hollow formwork, serving as a replacement for traditional wooden plywood or steel formwork.

Shear Walls and Column/Beam Casting: It is suitable for formwork support in various cast-in-place load-bearing walls. Its smooth and clean surface ensures that the demolded concrete structure achieves a fair-faced finish, eliminating the need for secondary plastering.

Bottom Formwork for Prefabricated Steel Truss Floor Decks: In prefabricated buildings, specialized hollow plastic templates are used as "plastic bottom molds" combined with steel trusses. This combination not only acts as casting formwork during the construction phase but also serves as part of the load-bearing reinforcement during the service phase, achieving an integrated template-and-structure design.

2. High-Rise, Mega-Scale, and Fast-Track Commercial Projects

For projects with extremely high demands for construction efficiency and material stability, hollow formwork demonstrates significant advantages.

Commercial Towers and Core Walls: Due to its light weight (only about 1/5th of steel), it greatly reduces handling difficulties and tower crane dependency. Furthermore, its low coefficient of thermal expansion prevents warping under extreme temperature differences, making it highly suitable for high-rise buildings in regions with drastic temperature fluctuations.

Rapid Modular Construction: Standardized and systematic assembly methods significantly improve installation efficiency, potentially shortening overall project schedules by 30%–50% to meet aggressive deadlines.

3. Industrial, Energy, and Infrastructure Engineering

Targeting harsh environments or special scenarios requiring exceptional corrosion resistance.

Chemical Plants and Water Treatment Facilities: Environments such as chemical plants, nuclear power stations, and sewage treatment facilities contain numerous corrosive media. Hollow plastic formwork offers excellent acid/alkali resistance and salt spray resistance, effectively preventing the rusting issues common with traditional steel formwork.

Bridge and Tunnel Engineering: In coastal bridges (high chloride ion environments) and narrow subway tunnel constructions, hollow formwork provides both rust-proof performance and ease of manual handling, significantly reducing safety risks while boosting operational efficiency.

4. Non-Load-Bearing Partition Systems (GQ Plastic Composite Hollow Inner Molds)

Beyond functioning as temporary casting molds, certain hollow formworks can serve as permanent wall components within a building.

Residential Non-Load-Bearing Partitions: Tubular hollow inner molds extruded from PVC materials are installed vertically and sprayed with cement mortar on both sides to form hollow cement wall panels. This process not only reduces wall self-weight (only 1/2 that of red brick walls) but also delivers superior sound insulation and thermal performance. Additionally, it eliminates the mold removal process, reducing construction waste.

5. Complex Geometries and Customized Components

Irregular Structures and Curved Designs: Hollow plastic formwork boasts strong process adaptability. It can be freely cut via sawing, planing, and drilling, or custom-welded to accommodate complex curved walls, domed ceilings, and other aesthetic designs, solving the slurry leakage problems associated with splicing traditional wooden formwork.

 

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