Plastic formwork how to used to make concrete wall forms? (Step-by-Step Guide)

Step-by-Step Guide

After watching the video, you can immediately become an expert in plastic concrete formwork construction

Plastic formwork has become a preferred choice for concrete wall construction due to its lightweight, durability, and reusability. Follow this systematic process to assemble and secure plastic formwork effectively, ensuring stable, high-quality concrete walls.​

Step 1: Connect Panels to Achieve Desired Wall Dimensions​

Start by preparing the construction site: ensure the base is level, clean, and marked with the wall’s layout (length, height, and thickness). Lay out the plastic formwork panels according to the marked dimensions. Each panel features interlocking edges or connection slots—align these precisely to form the first side of the wall. Use the provided plastic handles to fasten adjacent panels tightly; check that the joints are flush to prevent concrete leakage. Repeat the process for the opposite side, maintaining the exact wall thickness gap between the two panels. Verify the overall dimensions with a tape measure to ensure alignment with design specifications—adjust panels as needed before proceeding.​

Step 2: Secure Both Side Panels with Tie Rods​

Once both side panels are assembled, install tie rods to hold them in place. Drill holes through the pre-marked positions on the plastic panels (matching the tie rod diameter). Insert the tie rods horizontally through the holes, ensuring they penetrate both panels evenly. On each end of the tie rod, attach washers and nuts—these will distribute pressure and prevent panel damage. Tighten the nuts slightly to keep the panels aligned but leave room for adjustments during the next step. Ensure the tie rods are spaced uniformly (typically 40-60cm apart) to maintain consistent wall thickness and structural stability.​

Step 3: Install Steel Walers for Secondary Reinforcement​

Steel walers (horizontal steel beams) add critical rigidity to the formwork system. Place the steel walers vertically along the outer sides of both formwork panels, covering the tie rod positions. The walers should span the entire height of the wall, overlapping at joints for continuous support. Secure the walers to the tie rods using additional nuts or clamps, ensuring they are snug against the plastic panels. This secondary reinforcement prevents bulging or deformation when concrete is poured, distributing the pressure evenly across the formwork.​

Step 4: Tighten All Fasteners to Finalize the Formwork​

Conduct a final inspection of the entire formwork assembly. Using a wrench, systematically tighten all tie rod nuts and waler clamps—start from the bottom and work upward, alternating sides to maintain balance. Ensure the panels remain plumb (vertical) and level (horizontal) during tightening; use a spirit level to make adjustments. Check for gaps between panels or loose connections—seal any small gaps with foam strips or caulk to prevent concrete seepage. Once all fasteners are securely tightened, the plastic formwork is ready for concrete pouring. After the concrete cures (per manufacturer guidelines), loosen the fasteners, remove the walers and tie rods, and disassemble the plastic panels for reuse.​