Ordering ready-mix concrete for a home project or a construction site can seem like a daunting task if you have never done it before. Unlike buying bags of dry mix at a hardware store, ready-mix concrete arrives in a large rotating drum truck, pre-mixed and ready to pour. This method is efficient, saves manual labor, and ensures a consistent high-quality product for larger surfaces like driveways, patios, or foundations.
Successfully ordering concrete requires careful planning, accurate measurements, and clear communication with the supplier. By following a structured approach, you can ensure that your project stays on schedule and that you receive the exact amount and type of material needed for a durable result. This guide will walk you through everything you need to know about preparing for and placing a ready-mix concrete order.
Understanding Ready-Mix Concrete
Ready-mix concrete is a custom-made material manufactured in a factory or batching plant. It is a precise mixture of cement, water, and aggregates such as sand, gravel, or crushed stone. Because it is mixed in a controlled environment, the quality is often much higher than concrete mixed by hand on a job site.
When you order ready-mix, the concrete is transported to your location in a transit mixer, commonly known as a cement truck. The rotation of the drum keeps the concrete from setting during transit. Once it arrives, the clock starts ticking, as the concrete must be poured and finished before it begins to harden. Understanding this time-sensitive nature is the first step in a successful delivery.
Step 1: Measure Your Project Area
The most critical part of the ordering process is determining exactly how much concrete you need. Concrete is sold by the cubic yard. If you order too little, you will have a “cold joint” where the new batch meets the drying old batch, which creates a structural weak point. If you order too much, you are paying for material you don’t use and may have to pay an environmental disposal fee.
How to Calculate Cubic Yards
To find the volume of a rectangular area, you need three measurements: length, width, and thickness (depth). Use the following steps to get your number:
- Measure the length and width in feet.
- Measure the thickness in inches and convert it to feet (e.g., 4 inches is 0.33 feet).
- Multiply Length x Width x Thickness to get the total cubic feet.
- Divide the total cubic feet by 27 to convert it to cubic yards.
It is standard practice to add a 10% margin to your final number. This accounts for variations in the ground level, spillage, or slight errors in formwork. It is always better to have a small amount left over than to run short at the end of a pour.
Step 2: Prepare the Site for Delivery
Before you call the supplier, your site must be fully prepared. The concrete truck is extremely heavy, often weighing up to 70,000 pounds when full. You must ensure that the delivery route can support this weight without damaging underground pipes, septic tanks, or the driveway itself.
Clear the Access Path
The truck needs a clear, wide path to get as close to the pour site as possible. Standard trucks usually need about 12 feet of width and 14 feet of overhead clearance. If the truck cannot get close to the forms, you may need to rent a concrete pump or have a crew ready with wheelbarrows. Note that wheeling concrete is extremely labor-intensive and will slow down the process significantly.
Finalize the Formwork
Ensure your forms are sturdy and well-braced. The pressure of wet concrete is surprisingly high and can easily blow out a weak form. The ground inside the forms should be compacted and slightly dampened before the truck arrives to prevent the soil from sucking the moisture out of the concrete mix.
Step 3: Choose the Right Concrete Mix
When you call to place your order, the dispatcher will ask what “mix” you want. This usually refers to the strength of the concrete, measured in PSI (pounds per square inch). Different projects require different strengths.
- Patios and Walkways: 2,500 to 3,000 PSI is generally sufficient.
- Driveways: 3,500 to 4,000 PSI is recommended to support the weight of vehicles.
- Foundations and Footings: Usually require 3,000 to 5,000 PSI depending on local building codes.
You may also need to discuss additives. For example, “air entrainment” is an additive that creates tiny bubbles in the concrete, helping it resist cracking during freeze-thaw cycles in colder climates. If you are pouring in very hot or very cold weather, you might also ask about retarders or accelerators to control the setting time.
Step 4: Placing the Order
When you are ready to call, have all your details organized. The dispatcher will be looking for specific information to schedule your delivery accurately. This is the time to ask about pricing, delivery fees, and any potential environmental charges.
Information to Provide
Be prepared to provide the following details:
- The total number of cubic yards needed (including your 10% buffer).
- The specific PSI strength and any additives required.
- The exact delivery address and a description of the drop-off point.
- The desired date and time for the delivery.
- Your contact information for the driver.
It is often best to schedule your delivery for early in the morning, especially during the summer. This gives you the maximum amount of daylight and cooler temperatures to work with the wet material. Most suppliers require at least 24 to 48 hours of notice, though busy seasons may require booking a week in advance.
Step 5: Managing the Delivery Day
On the day of the pour, ensure you have enough help on hand. A standard 10-yard truck can be unloaded in about 30 to 60 minutes. If you take longer than the allotted “free time” (usually 5-7 minutes per yard), the company may charge you a standby fee.
Safety and Coordination
Wear appropriate safety gear, including boots, gloves, and eye protection. Wet concrete is alkaline and can cause chemical burns on bare skin. Designate one person to communicate with the driver. The driver will operate the chutes, but your team is responsible for spreading and leveling the material as it comes out.
Once the concrete is in the forms, use a screed board to level the surface and a bull float to push down the large aggregate and bring the “fines” to the top. This creates a smooth surface for final finishing once the bleed water has disappeared.
Conclusion
Ordering ready-mix concrete is a straightforward process when you approach it with the right preparation. By accurately calculating your needs, preparing your site for heavy machinery, and choosing the correct mix for your specific application, you can ensure a professional-grade result for your project. Remember that communication with your supplier is key; don’t hesitate to ask questions about their specific delivery requirements or recommendations for your local climate.
With the concrete poured and finished, the final step is allowing it to cure properly by keeping it moist for several days. This patience ensures the longevity and strength of your new surface. For more tips on home improvement and DIY construction projects, feel free to explore our other guides on site preparation and outdoor maintenance.