Installation of a concrete batching plant at site has become a basic need for all infrastructure projects. Be it a nuclear, thermal or hydel project or a few kilometres long bridge or setu, be it a tunnel, a housing colony or any other structure, availability of a batching plant is essential if timely production of concrete coupled with full quality control over it is to be ensured. This realisation has already come home to the project developers and engineers. Today, batching plants with 30, 45, 60, 90, 120, 250 and even 330 cubic metres per hour capacity are being assembled in India by using fully imported mixing units. All these plants need certain foundations for their installation. The only problem that the builders face and dislike is shifting of the plant from one location to other on completion of a project, abandoning laid foundations at a previous location and laying new foundations at new location. Mobile batching plants: The problem has been solved now with the arrival of Mobile Batching Plants! These plants are self sufficient in themselves and include silos for storage of cement and aggregates. No foundations are required for their erection. Whenever a project is completed or its concrete requirements are fulfilled, the mobile batching plant can be moved to the next project without any fuss. Storage section: Mobile batching plants have compartment batchers that can be set up directly on the ground and need no foundations. Compartment batchers may have net storage capacity up to 70 cubic metres. The cement storage silos of about 3.0 metres diameter and capacity of 60 to 100 cubic metres are also on mobile foundations. With these storage capacities, concrete production up to 90 cubic metres per hour can be achieved. Batching equipment: Batching equipment adds all ingredients to concrete by weight. Volumetric equivalents are not used as some error may crop up in that. Batching by weight is best and most accurate. Therefore, load cells are used and weigh batching of cement, aggregates and admixtures is done. Even water is added by weight by use of pulse meter or water gauge. Cement hopper is self cleansing type and is connected to the mixing unit through a hose to avoid any pollution. Normally, mobile batching plants allow use of maximum 4 types of aggregates. 40 down aggregate is allowed if percentage retention on 40 mm sieve is discarded. Mixing equipment: The mixers used for mixing of concrete ingredients play a pivotal role in deciding the quality of concrete produced. For small capacity mobile batching plants, trough type mixers are used while for large capacity plants, twin shaft mixers are used. Twin shaft mixers ensure better mixing of concrete and save time. Concrete mixing time in twin shaft mixers is just 25 to 30 seconds per batch instead of normal mixing time of 2 minutes.