Concrete monolithic foundation 4 x 4 m. скачать в хорошем качестве

Concrete monolithic foundation 4 x 4 m.

This is the rear wall of my workshop, and I’ve decided to extend it by 4 meters. Today I’ll show you the most technically demanding stage — the foundation. Due to limited site access, only a small 3–5 ton dump truck can reach my property, making delivery the most expensive part of any bulk material purchase. One cubic meter of sand and two of crushed stone cost me €180. First, I dismantled the old workbenches and cleared the construction zone. After removing surface obstacles, I began excavation. I removed about 40 cm of topsoil — enough to expose the transition from humus to load-bearing subsoil. To ensure flatness, I used a reference level based on the existing paving stones and tensioned horizontal guide lines. I installed geotextile over the excavated surface to prevent aggregate migration and frost heave. Then added a sand cushion as a shock-absorbing layer, followed by compacted crushed stone to form the subbase. For compaction, I used a 100 kg plate compactor. To contain the bedding layer, I installed a perimeter of paving bricks on a mortar bed with a drainage system underneath, leading to a soakaway. Next came the formwork. Instead of traditional timber boards, I poured a permanent reinforced concrete frame — essentially a rigid curb shutter that later becomes part of the slab itself. After that, I installed two layers of welded mesh reinforcement (6 mm bars, 150×150 mm grid) using plastic spacers to ensure correct positioning within the slab volume. I laid 50 mm extruded polystyrene foam (XPS) under the slab as both thermal insulation and a moisture barrier. Sheets were edge-lapped and bonded with polyurethane foam. For the concrete mix, I used: 25 L crushed granite, 15 L washed sand, 10 L cement, and 6 L water with 100 mL plasticizer. Mixing sequence: water, half the aggregate, cement, and the rest of the dry components. Concrete was poured, leveled manually, and covered with plastic sheeting. I kept it moist for 4 days to ensure proper curing. Finally, I applied a layer of self-leveling compound over the slab to correct minor surface imperfections. Now the foundation is ready for load-bearing machinery installation.