Admixture Dispenser

The Admixture Dispenser is a critical component within a concrete batching plant responsible for the controlled addition of chemical admixtures (such as water reducers, accelerators, retarders, or air-entraining agents) to the concrete mix. It ensures precise volumetric or gravimetric dosing according to the batch recipe, directly influencing the workability, setting time, strength, and durability of the final concrete product. The dispenser typically operates by drawing admixture from a storage tank via a pump. A flow meter or load cell measures the quantity being dispensed. A control system (often PLC-based) receives the target dose from the batching plant's master controller, activates the pump and valve, and stops the flow once the measured quantity matches the preset value, ensuring accurate and repeatable dosing for each batch. The unit is constructed with wetted parts in stainless steel (SS304–SS316) to resist corrosion, a carbon steel structural frame, and a polyethylene or PVC storage tank. It offers a dispensing capacity of 5–100 L/min with an accuracy of ±0.5% and repeatability of ±0.2%. Operating pressure ranges from 1.0 to 1.6 MPa, supply voltage is 220–380 V AC, and power consumption is 0.5–2.5 kW. The operating temperature range is -10 to 50 °C, and ingress protection is IP54–IP65 (IEC 60529). Weight ranges from 80 to 250 kg, and dimensions vary from 800×600×1200 to 1200×800×1500 mm. These values are reference ranges; verify model-specific specifications with the manufacturer or supplier. The dispenser is designed for dusty and wet environments, with IP65 protection available. It is essential to confirm the compatibility of wetted materials with the specific admixture chemicals. The unit's accuracy and repeatability are critical for consistent concrete quality and minimizing admixture waste. Proper maintenance, including regular calibration and inspection of seals and valves, is necessary to ensure reliable operation. Failure to maintain the system can lead to dosing errors, affecting concrete properties. Always consult the legal manufacturer for detailed technical documentation and installation guidelines.

The dispenser draws admixture from a storage tank via a pump. A flow meter or load cell measures the dispensed quantity. A PLC-based control system receives the target dose from the batching plant's master controller, activates the pump and valve, and stops the flow when the measured quantity matches the preset value. This ensures accurate and repeatable dosing for each batch.