RMC is a type of concrete that is manufactured in a factory or batching plant, according to a specific set of proportions, and then delivered to a construction site by truck-mounted transit mixers.

The advantages of using RMC include consistent quality, reduced waste, faster construction times, and greater accuracy in determining the correct proportions of ingredients. RMC can also reduce the need for on-site storage of raw materials, as well as the need for on-site mixing equipment.

The main difference between RMC and traditional concrete is that RMC is manufactured in a factory or batching plant, while traditional concrete is mixed on-site using raw materials. RMC offers several advantages over traditional concrete, including consistent quality, reduced waste, and faster construction times.

The main ingredients of RMC include cement, water, aggregates (sand, gravel, or crushed stone), and sometimes additives such as air-entraining agents, water-reducing agents, or pigments.

The setting and hardening time for RMC depends on several factors, including the type of cement used, the temperature and humidity at the construction site, and the type and amount of additives used. On average, RMC takes about 24-48 hours to set, and 7-28 days to fully harden.

RMC is delivered to a construction site by truck-mounted transit mixers, which are equipped with a rotating drum that mixes the concrete on the way to the site. The concrete is poured into a formwork or mold, where it sets and hardens into the desired shape.

The strength of RMC is determined by performing compressive strength tests on cylindrical or cubic specimens of the concrete. The tests are performed at various intervals, such as 7 days, 14 days, and 28 days, to assess the strength gain of the concrete over time.