What to Pay Attention to in UHPC Construction: Key Technical Points of Qinglong UHPC Construction

UHPC construction requires special attention to key aspects such as material preparation, pouring techniques, and curing regimes. Based on 28 years of construction experience, Qinglong UHPC has summarized the following key technical points to ensure construction quality.

During material preparation, the water-binder ratio must be precisely controlled between 0.18 and 0.22, with water dosage errors not exceeding ±0.5%. Mixing time should be controlled at 4-6 minutes to ensure even fiber distribution. During pouring, pumped placement should be used with a drop height of no more than 0.5 meters to prevent segregation. In a key project in Shenzhen, strict control of these parameters enabled the successful pouring of complex joints, and testing confirmed that the strength fully met the design requirements.

Key Points for Material Preparation

Use electronic scales with 0.1% accuracy for batching. Add materials in sequence to ensure uniformity. Record and file the mixing time for each batch. These controls ensure material quality.

Key Points for Pouring Techniques

Pour in layers, with each layer no thicker than 300mm. Use vibrators to aid compaction while avoiding over-vibration. Control the pouring speed to prevent cold joints. These techniques ensure pouring quality.

Key Points for Curing Regime

Begin curing immediately after final setting to prevent early cracking. Apply thermal and moisture curing for no less than 7 days. Control heating and cooling rates to prevent thermal cracks. This curing ensures proper strength development.

Key Points for Quality Control

Test flowability, temperature, and other indicators for each batch. Retain specimens to test strength at various ages. Maintain complete, traceable construction records. This control ensures project quality.

Strictly following these construction points is key to ensuring UHPC performance. It is recommended to conduct technical briefings before construction, strengthen supervision during construction, and carry out rigorous testing afterward. Qinglong UHPC provides full-process technical guidance to ensure construction quality.