What is ready-mix concrete and what are its advantages?

Ready-mix concrete (RMC) is manufactured in a batching plant and delivered to site in transit mixers. Advantages include: consistent quality through precise batching, elimination of on-site storage of materials, reduced labor and equipment needs, faster construction, better quality control, and availability of special mixes. Disadvantages include need for good coordination, limited delivery distance (usually within 2 hours), and higher cost for small quantities.