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 proportioning, 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 proportioning, the water-binder ratio must be precisely controlled between 0.18 and 0.22, with water content error not exceeding ±0.5%. Mixing time should be controlled at 4-6 minutes to ensure uniform fiber distribution. During pouring, pumping should be used with a drop height of no more than 0.5 meters to prevent segregation. In a key project in Shenzhen, by strictly controlling these parameters, the pouring of complex joints was successfully completed, and tested strength fully met the design requirements.

Material Proportioning Key Points

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

Pouring Technique Key Points

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

Curing Regime Key Points

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

Quality Control Key Points

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

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