Ready mix concrete is a pre-mixed construction material that is manufactured in a factory or batching plant according to a set recipe. Once mixed, it is delivered to a job site in a specialized transit mixer, often referred to as a cement truck. This method of obtaining concrete is preferred for both large-scale commercial projects and small residential DIY tasks because it ensures a consistent, high-quality product that is ready to use immediately upon arrival.
By choosing ready mix concrete, you eliminate the need to store raw materials like sand, gravel, and cement on your property. You also avoid the physically demanding task of mixing these components by hand or with a small portable mixer. This article will guide you through everything you need to know about ready mix concrete, from its various types to the best practices for ordering and installation.
What is Ready Mix Concrete?
Ready mix concrete (RMC) is a custom-made product tailored to the specific needs of a construction project. Unlike traditional concrete that might be mixed on-site, RMC is produced under controlled conditions. This precision ensures that the ratio of water, cement, and aggregates is exactly right for the intended use.
The manufacturing process takes place at a batching plant. Here, sophisticated equipment weighs the ingredients and combines them with precision. Because the environment is regulated, the concrete produced is generally much stronger and more durable than concrete mixed manually in small batches.
The Three Main Types of Ready Mix Concrete
Depending on how and where the concrete is mixed, it generally falls into one of three categories. Understanding these can help you discuss your needs more clearly with a supplier.
- Transit Mixed Concrete: Also known as dry-batched concrete, the ingredients are added to the truck at the plant, but the actual mixing happens inside the truck’s rotating drum while it is on its way to your site. This prevents the concrete from hardening during long commutes.
- Central Mixed Concrete: This type is mixed completely at the batching plant before being loaded into the truck. The truck’s drum simply acts as an agitator to keep the mixture fresh and prevent it from settling during transport.
- Shrink Mixed Concrete: This is a hybrid approach. The concrete is partially mixed at the plant to reduce its volume (or “shrink” it), allowing the truck to carry a larger load. The final mixing is completed during the journey to the site.
Key Benefits of Using Ready Mix Concrete
There are several reasons why homeowners and contractors prefer ready mix over on-site mixing. The primary advantages focus on quality, efficiency, and cost-effectiveness.
Consistency and Quality Control
Because RMC is made in a controlled facility, every batch is consistent. This is vital for structural integrity. When you mix concrete on-site, variations in the amount of water or the quality of the sand can lead to weak spots or uneven finishes. Professional batching plants use computerized systems to ensure every cubic yard meets strict standards.
Time and Labor Savings
Mixing concrete by hand is a slow, exhausting process. For a project like a new driveway or a shed foundation, it could take days to mix enough bags of concrete manually. Ready mix concrete is delivered in bulk and can be poured in a fraction of the time, allowing you to move on to the finishing stages much faster.
Reduced Waste and Storage
When you order ready mix, you only pay for what you need. You don’t have to worry about leftover piles of sand or bags of cement taking up space on your lawn. Additionally, there is less dust and noise pollution at your home since the heavy mixing happens elsewhere.
Common Applications for Ready Mix Concrete
Ready mix concrete is incredibly versatile. It is used in almost every type of construction, from massive skyscrapers to simple backyard improvements. Some of the most common residential uses include:
- Driveways and Patios: RMC provides a smooth, durable surface that can withstand the weight of vehicles and the wear of weather.
- Foundations and Footings: For sheds, garages, or home additions, a solid concrete foundation is essential for stability.
- Sidewalks and Walkways: It is the standard material for creating safe, level paths around a property.
- Retaining Walls: Concrete is often used to create strong walls that hold back soil and prevent erosion.
Understanding Concrete Strength (PSI)
When you call a supplier, they will ask what PSI you need. PSI stands for “pounds per square inch,” and it measures the compressive strength of the concrete once it has fully cured. Higher PSI numbers mean the concrete can handle more weight and pressure.
For a standard sidewalk or patio, a PSI of 2,500 to 3,000 is usually sufficient. For driveways that will hold heavy trucks or for structural foundations, you may need a PSI of 4,000 or higher. Always check local building codes or consult a professional to determine the correct strength for your specific project.
How to Calculate How Much Concrete You Need
Concrete is sold by the cubic yard. To ensure you order the right amount, you must calculate the volume of the area you plan to fill. The basic formula is: Length (ft) x Width (ft) x Depth (ft). This gives you the volume in cubic feet.
To convert cubic feet to cubic yards, divide the total by 27. For example, if you are pouring a patio that is 10 feet long, 10 feet wide, and 4 inches (0.33 feet) deep, the calculation would be: 10 x 10 x 0.33 = 33 cubic feet. Then, 33 divided by 27 equals approximately 1.22 cubic yards.
It is standard practice to add an extra 10% to your final number. This accounts for spillage, uneven ground, or slight errors in measurement. It is much better to have a little bit left over than to run out before the job is finished.
How to Order Ready Mix Concrete
Ordering concrete for the first time can feel intimidating, but the process is straightforward if you are prepared. Follow these steps to ensure a smooth transaction:
- Find a Local Supplier: Search for “ready mix concrete near me” and look for companies with good reviews and reliable delivery records.
- Provide Project Details: Tell the supplier what you are building. They can often recommend the best mix and PSI for your specific needs.
- Discuss the “Slump”: Slump refers to the consistency of the concrete. A higher slump means the concrete is more fluid and easier to pour, while a lower slump is thicker.
- Schedule Your Delivery: Concrete trucks operate on tight schedules. Book your delivery at least a few days in advance, and ensure you are ready for the truck’s arrival.
Preparing Your Site for Delivery
The success of your concrete project depends heavily on your preparation. Before the truck arrives, make sure the area is fully prepped. This includes setting up sturdy wooden forms to hold the concrete in place and ensuring the ground is level and compacted.
You must also ensure the delivery truck has clear access to the pour site. These trucks are very heavy and can easily damage soft lawns or thin asphalt. If the truck cannot get close enough, you may need to rent a concrete pump or have several people ready with wheelbarrows to move the material quickly.
Curing Your Concrete
Once the concrete is poured and leveled, the work isn’t quite finished. Concrete does not “dry”; it “cures” through a chemical reaction. To achieve its full strength, concrete needs to stay moist for several days after it is poured. You can achieve this by lightly misting the surface with water or covering it with a plastic sheet to trap moisture. Proper curing prevents cracking and ensures a long-lasting finish.
Summary of Ready Mix Concrete
Ready mix concrete is an efficient, reliable, and high-quality solution for almost any construction project. By understanding the different types of mixes, calculating your needs accurately, and preparing your site properly, you can achieve professional results with minimal stress. Whether you are upgrading your home with a new patio or starting a major renovation, ready mix concrete provides the solid foundation you need.
For more helpful advice on home improvement and construction projects, explore our other guides on SearchAndHelp.com, such as our articles on landscaping basics or DIY home repairs.