In reinforced concrete construction, cement spacers are a traditional and practical method for controlling the reinforcement cover. They are small prefabricated components made mainly from cement, with the same core function as plastic spacers – ensuring a specified gap between the reinforcement and the formwork, thus providing effective anti-corrosion protection for the reinforcement.

The production of cement spacers follows a simple yet solid principle: using cement as the base material, mixed with aggregates such as sand and gravel in proportion to form concrete, which is then cast into small blocks (usually with sizes determined by the required cover thickness). A piece of iron wire is pre-embedded during the prefabrication process. This iron wire serves as the key connection between the spacer and the reinforcement. Once the spacer hardens and takes shape, it can be conveniently tied to the reinforcement using the iron wire, achieving a stable fixation.

The advantages of this production method lie in the easy availability of materials, low cost, and the fact that the spacer itself is similar in material to concrete, allowing it to better integrate into the overall structure and avoid bonding issues caused by material differences. The small block design facilitates flexible adjustment of positions according to the reinforcement arrangement, adapting to scenarios with different densities of reinforcement meshes.

The core function of cement spacers is reflected in creating an effective gap between the reinforcement and the formwork: through binding and fixation, the spacers support the reinforcement at a certain distance from the formwork. When concrete is poured, this gap is filled with concrete, forming a protective cover that wraps around the reinforcement.

Its protection logic is clear and straightforward: the formed cover isolates the reinforcement from direct contact with the external environment, preventing the reinforcement from being exposed to air, moisture, or corrosive substances, thereby avoiding oxidation and rusting of the reinforcement. This simple physical isolation is the foundation for ensuring the durability of reinforced concrete structures – if the reinforcement does not corrode, it can maintain its mechanical properties for a long time, ensuring the safety and service life of the structure.

Cement spacers, with their stability and economy, are widely used in various construction projects, especially in projects with strict cost control or dominated by traditional construction techniques. Whether it is for walls, floor slabs, beams, columns, or other components, precise control of the reinforcement cover can be achieved by binding cement spacers.

Although new products such as plastic spacers have become increasingly popular, cement spacers still hold their ground due to their easy accessibility of materials and good compatibility with concrete. For small-scale projects or scenarios with limited on-site processing conditions, prefabricated cement spacers are a practical choice. They achieve crucial protection for reinforcement with a simple structure, making them a typical example of "small components with great effects" in construction.