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

The casting method for UHPC must be selected based on factors such as structural shape, dimensions, and construction conditions. Based on extensive engineering practice, Qinglong UHPC has summarized the main methods including pumped casting, formwork casting, and sprayed casting, each with its own applicable conditions.

In the casting of a large bridge deck slab in Shenzhen, the pumped casting method was adopted, with a maximum horizontal pumping distance of 150 meters and a vertical pumping height of 30 meters. By optimizing the mix proportion, the project controlled the flowability within 650-700mm, ensuring pumpability while preventing segregation. At complex joint locations, the formwork casting method was used, with layered casting and gradual compaction to ensure structural integrity. For vertical facade construction, the sprayed casting method was applied, achieving fiber distribution uniformity of over 90%.

Key Technical Points of the Pumped Casting Method

Suitable for casting large-area horizontal structures. The slump must be controlled at 600-700mm. The pump pipe diameter should be no less than 3 times the conveyed particle size. This method is highly efficient and suitable for large-volume casting.

Key Technical Points of the Formwork Casting Method

Suitable for complex structures and thin-walled components. The layer thickness should not exceed 300mm. Vibrators are used to assist compaction. This method offers high precision and is suitable for complex shapes.

Key Technical Points of the Sprayed Casting Method

Suitable for vertical surfaces and overhead construction. Fiber content can be increased to 3%-4%. Specialized equipment and techniques are required. This method is highly adaptable and suitable for special locations.

Key Technical Points of the Self-Leveling Casting Method

Suitable for floors and slab surfaces. Flowability is controlled at 700-800mm. It levels under its own weight without vibration. This method is fast to construct and achieves high surface flatness.

Choosing the right casting method is essential. It is recommended to select the most suitable method based on the specific project conditions, combining methods when necessary. Qinglong UHPC provides professional technical guidance to help customers optimize construction plans.