住宅建筑工程

Li Qiang, we're installing Level 8 today — precast concrete shear walls and composite slabs. Each wall panel is 2.8m high, 3.6m wide, 200mm thick, weight approximately 5 tons. The connection between wall panels uses grouted sleeve connectors. The rebar from the lower panel protrudes 200mm and inserts into the sleeves cast in the upper panel. Then we inject high-strength, non-shrink grout under pressure to fill the annular space. This connection is the structural backbone — if the grouting fails, the wall panels are not structurally continuous.

Correct. Tom, you'll witness the grouting. The critical parameters: grout flow cone test must be 300-350mm before we start — if it's too thick, it won't fill the sleeves; too thin, and the strength drops. Injection pressure 0.8-1.0 MPa from the bottom port. We inject until grout flows cleanly from the top outlet port of each sleeve. Every sleeve must be verified — if the top port doesn't flow, the sleeve is not full. We're grouting panel PW-8A first — it has 12 sleeves, six on each vertical edge.

Panel PW-8A is placed on shims. Plumb verified — 2mm deviation on a 2m level, within 5mm tolerance. Braces installed. Now mixing grout... flow cone test: 320mm. Within range. Starting injection on sleeve 1, bottom port.

(watching the outlet ports) Sleeve 1: top port flowing — full. Sleeve 2: flowing. Sleeves 3, 4, 5, 6... all flowing. Wait — sleeve 9 top port is NOT flowing. Ivan, stop injection on sleeve 9. Check the outlet port — it might be blocked.

(checks port with a wire probe) Found it — a small piece of foam from the sleeve cap was left in the port during factory casting. The foam blocked the outlet. Clearing it now... (probes the port, foam piece comes out) Re-starting injection — outlet is flowing. Sleeve 9 filled. All 12 sleeves confirmed full. Panel PW-8A grouting complete and verified. Total grouting time: 18 minutes.

Ahmed, this is the pre-handover wet area inspection. Every bathroom and kitchen in all 200 apartments must pass a 24-hour ponding test. The procedure: plug the floor drain, fill the room with water to a depth of 30-50mm, mark the water level, and check after 24 hours. Any drop in water level or any sign of moisture on the ceiling of the unit below is a fail. Let's start with Unit 1205 — the master bathroom.

1205 master bathroom was filled yesterday at 14:00. Water depth: 40mm. I marked the water level with tape on the wall. It's now 14:15 the next day — 24 hours and 15 minutes. The water level is at the tape mark — zero visible drop. Let's check Unit 1105 below. (goes downstairs) Ahmed, the ceiling of 1105 below the 1205 bathroom — completely dry. No stains, no dampness, no peeling paint. Moisture meter reading: 4.2% — that's normal equilibrium moisture for the concrete slab. Unit 1205 master bathroom — PASS.

Good. Let me check the shower area specifically — that's where most leaks happen. The shower floor-to-wall junction and the drain penetration are the critical points. (inspects with flashlight) The silicone seal at the wall-floor joint is intact and tooled smooth. No gaps around the drain flange. OK, accepted. Let's move to Unit 1208 — the kitchen.