Concrete Spacers by PRECA: Automated Production & High Quality

In modern construction, concrete spacers play a vital role in positioning reinforcement steel bars (rebar) and maintaining the required concrete cover thickness according to engineering standards. However, to ensure that every single spacer achieves high compressive strength and resists cracking under heavy structural loads, strict control over raw material proportioning and mixing at the factory is essential.

At PRECA, we invest in a synchronized production line for concrete spacers, featuring an automated concrete batching plant and rigorous quality control processes to meet the demands of contractors and distributors nationwide.

1. Why Does Mix Proportioning Determine the Durability of Concrete Spacers?

Unlike manually cast spacers made on-site—which often suffer from inconsistent mixing ratios—high-grade concrete spacers require precise measurements of cement, sand, aggregates, water, and admixtures.

If the mix design is inaccurate or unevenly blended:

• Spacers are prone to air voids, chipped edges, or breakage during rebar tying and slab pouring.

• Water resistance and structural compatibility with the surrounding reinforced concrete (foundations, beams, and slabs) are compromised.

• Deviations in concrete cover thickness can occur, directly affecting the long-term durability and lifespan of the building structure.

For this reason, maintaining complete self-sufficiency in fresh concrete supply through an in-house automated batching system is the foundation that allows PRECA to deliver uniform quality across every production batch.

2. Inside the Automated Batching Plant for Concrete Spacers at PRECA Factory

To guarantee both production schedules and consistent quality for our concrete spacers as well as custom-cast foundations, beams, and slabs, the PRECA factory operates a closed-loop cement silo and an automated concrete batching plant.

2.1. Automated Weighing and Proportioning System

Input materials—including sand, aggregates, cement, water, and admixtures—are measured automatically using an electronic weighing system. This process ensures strict control over the mix proportions for every batch, minimizing human error compared to traditional manual mixing methods.

2.2. Twin-Shaft Compulsory Mixing Technology

The batching plant at PRECA utilizes a twin-shaft compulsory mixer (0.5 m³ per batch capacity), allowing the concrete mixture to be blended thoroughly in a short cycle. This creates high density, uniform consistency, and prevents aggregate segregation.

2.3. Stable 20 m³/h Capacity & Enclosed Silo Storage

With a stable operating capacity of 20 m³/hour combined with an enclosed cement storage silo and screw conveyor system, the PRECA factory maintains full control over its fresh concrete supply. The closed feeding process not only keeps cement dry and well-preserved but also minimizes material loss and reduces cement dust emissions into the surrounding environment.

3. Key Advantages of PRECA Concrete Spacers for Construction Contractors

Thanks to systematic investment from raw material batching to molding, surface treatment, and curing, concrete spacers manufactured by PRECA consistently meet strict on-site inspection requirements:

1. Diverse Models and Dimensions: A complete product range covering floor, beam, and column spacers (15mm – 50mm) as well as specialized upper-layer rebar and foundation spacers such as H-6, H-7, H-8, H-9, H-10, H-12, and H-15.

2. QUATEST 3 Certified Quality: All concrete spacers produced by PRECA are tested and certified for compressive strength by the Quality Assurance and Testing Center 3 (QUATEST 3).

3. Sharp Finish and Accurate Dimensions: Standardized molds combined with a dedicated dust-extraction surface treatment booth ensure clean, sharp-edged spacers with clear markings for easy project acceptance.

4. Custom Concrete Casting Services: In addition to standard in-stock concrete spacers, PRECA also provides custom casting for foundations, beams, and slabs tailored to specific engineering drawings and project requirements.4. Contact PRECA for Concrete Spacers Quotation and Technical Support

With large-volume inventory ready in stock and reliable in-house manufacturing capacity, PRECA Corporation is ready to supply construction contractors, projects, and distribution partners across Vietnam.

For technical consultation, product sample boards, or wholesale quotations on concrete spacers and custom concrete casting services, please contact PRECA directly:

• PRECA Corporation

• Hotline / Zalo: 0933 130 035

• Website: www.preca.vn