What Are the Casting Methods for UHPC? A Comprehensive Analysis of Qinglong UHPC Casting Technology

The UHPC pouring method must be selected based on component shape, dimensions, and construction conditions, mainly including pumped pouring, formwork pouring, and self-leveling pouring. The correct pouring method ensures material compactness and fiber orientation.

Regarding pouring techniques, the pouring speed must be controlled to remain continuous to avoid layer segregation. When pumping, the pump pressure must be controlled at 0.5-1.0 MPa with a flow rate of 0.5-1.0 m³/h. In a super high-rise project in Shenzhen, vertical structure construction at a height of 180 meters was successfully completed through pumped pouring. During formwork pouring, the material must be advanced from one end to the other to avoid air bubble accumulation. Self-leveling pouring requires the slope to be controlled at ≤3° to ensure natural leveling.

Key Points of Pumped Pouring Technique

Suitable for vertical structures with heights ≤200 m; the pump pipe diameter must be ≥125 mm to reduce resistance; the outlet velocity is controlled at 0.5-1.0 m/s to prevent segregation. This process is suitable for high-rise construction.

Formwork Pouring Process Control

The layer thickness is controlled at 300-400 mm; the spacing between pouring points is ≤1.5 m to ensure uniformity; vibration must be timely and moderate to avoid excessive vibration. This process is suitable for horizontal components.

Self-Leveling Pouring Application Technique

The flowability must be controlled at 600-800 mm; the slope is controlled at ≤3 degrees to ensure self-leveling; the thickness is controlled at 10-50 mm to avoid cracking. This process is suitable for thin-layer construction.

Innovation in Special Pouring Methods

Shotcreting is used for complex curved surfaces, with thickness controllable at 20-100 mm; vacuum-assisted pouring improves compactness, reducing porosity to 3%; these innovative methods expand the range of applications.

The pouring method should be selected according to project characteristics. Process trials are recommended to determine the optimal solution. Qinglong UHPC provides technical consultation.