Ready mix concrete, mostly referred as RMC, is the concrete, made with water, portland cement, and aggregates such as gravel, sand, or crushed stone. It is delivered to the customer in a ready-to-use manner. Since its manufacturing is highly mechanized or/and fully automatic, the chances of errors at the site are minimum. Ready mix concrete has gained widespread acceptance in the Indian market due to several advantages, including overall quality control. Buying RMC from a trusted manufacturer is vital to ensure the completion of your project using quality products.
Ready mix concrete is brought and sold by volume, usually expressed by cubic meter. The manufacturing of RMC takes place in a factory or batching plant, under specially controlled conditions. All the ingredients involved are procured individually and mixed in precise proportions, as dictated by the requirement. All the components are converted into a uniform concrete mass during the mixing stage. It is delivered to the construction site via transit mixers. The mixing time is given due importance which begins the moment all the materials and water are poured into the mixer. The mixer keeps rotating while on transit. To ensure the best quality upon arrival, the project managers need to adhere to the best practices. Here is a complete guide that you need to follow when buying ready-to-mix concrete:
The Appropriate RMC Design Mix
RMC, according to IS 4926 is delivered in a plastic form and doesn’t require any further treatment before being used. Cement, the most important of all the elements is the ingredient that lends concrete, its resistance. Therefore, the cement used must be of high quality for the concrete to possess high durability and workability. The desired mix plays a huge role in the decision pertaining to RMC procurement. Differing in characteristics and quality, RMC is available in several grades such as M10, M14, M25, M30, M35, and M40 that defines its compressive strength. M20, for instance, will have a 1:1.5:3 mix of cement, sand, and aggregate respectively. Its compressive strength will be 20 MPa/2900 psi.
Meeting Project Requirements
The right RMC mix can assist in reducing project costs to a great extent. Therefore, it’s important to list your exact requirements and find the right mix, based on the project that you are working on. Based on the type of concrete required, different RMC design mixes can be leveraged. Durability, workability, grade, and compressive strength are some of the factors that must be taken into consideration when outlining your project. The key project details, along with the time of requirement, quality, quantity, location, and work type must be conveyed to the RMC supplier for ensuring timely and quality delivery. If the project involves development of pathways, patio slabs and non-structural work then M10 grade works well. For pavement kerbs and floor blinding M15 grade is used, while M20 is widely used for domestic floors and foundations. M35 is a heavy concrete mix and is mostly used for creating commercial structures, external walls and slabs.
Choosing the Right Manufacturer
Besides choosing the right RMC, possessing the ideal composition and compressive strength for your construction project, it’s important to choose the right manufacturer. An established RMC supplier will have its own batching and mixing facilities, testing labs, and transportation infrastructure to help you procure the right quality RMC. It is best to opt for local suppliers as that will help in saving on the hauling cost. Remember, the supplier chosen, the mix required and the transportation costs will dictate the pricing of the RMC being acquired. Additionally, you must consider the aggregate costs when choosing the right supplier. You can make use of online and traditional methodologies to arrive at the right manufacturer with its own payment terms that can offer cubic-meter based pricing for the required mix.
The next thing that matters while procuring the right RMC is the raw materials being used, which must be of top quality. Also make sure that the RMC plant is close to the project site, running efficiently and leveraging top quality raw materials, as mentioned earlier. Another thing that your chosen RMC plant must implement is waterproof cement silos along with damp-proof, weatherproof, and dust-free storage solutions.
Ensuring quality procurement
A variety of control testing methods can be leveraged upon the arrival of RMC to test its quality. A comprehensive ERP system is a great tool to ensure the procurement of a high-quality RMC mix via a supplier that complies with a range of control tests. When RMC is managed, handled, and delivered efficiently, it can lead to a significant reduction in project costs. Timely delivery plays an equally important role here as any delays, batching errors, or preparation time can affect the workability of the RMC reducing it to a considerable extent. If required, consider buying from different suppliers for different projects.
RMC buying can be complex, considering the technicalities involved. The aim of this guide is to help you streamline the process and gain useful insights into the different buying stages. BuildSupply assists project managers throughout, right from procurement to after-sales, and offers GPS-enabled delivery to ensure efficient procurement, without any delays.