Delivering Concrete: An Overview
Concrete delivery is a critical step in any construction or landscaping project. Whether you’re pouring a driveway, slab, foundation, or patio, getting the right mix delivered at the right time and in the right quantity can make the difference between a durable, attractive finished surface and costly delays or repairs. This guide covers delivery options, how to calculate volumes, scheduling and site preparation, best practices for pouring, and important safety and environmental considerations.
Delivery Options
Selecting the appropriate delivery method depends on project size, location, and access. The two main options are ready-mix delivery and volumetric delivery.
Ready-Mix Concrete
Ready-mix concrete is manufactured at a batching plant and transported to the site in rotating drum trucks (transit mixers). It arrives as a finished product with the specified slump, strength, and additives. Ready-mix is ideal for larger pours where consistency and established mix designs are essential.
Volumetric Concrete
Volumetric mixers carry raw materials and water and mix them on-site. This method offers flexibility for smaller projects, variable pour sizes, and jobs that require multiple mix designs during the same visit. Volumetric delivery can reduce waste and is useful when access for large trucks is limited.
Calculating How Much Concrete You Need
Accurate volume calculation prevents over-ordering (waste and cost) or under-ordering (delays and cold joints). Concrete volume is typically calculated in cubic yards (US) or cubic meters (metric).
Basic Volume Formula
Length × Width × Depth = Volume. Convert all measurements to the same units, then convert cubic feet to cubic yards by dividing by 27 (1 cubic yard = 27 cubic feet).
Example: For a slab 20 ft long × 10 ft wide × 0.5 ft thick: 20 × 10 × 0.5 = 100 cubic feet ÷ 27 = 3.7 cubic yards. Add 5–10% for waste and uneven subgrade.
Tips for Accurate Ordering
- Round up to the nearest half or full cubic yard when using ready-mix trucks, as minimum loads may apply.
- Add extra volume for sloped areas, trenches, or unexpected settling—typically 5–10%.
- Consult the supplier for minimum and maximum charges, and for recommendations on mix design based on application.
Scheduling and Timing
Concrete must be placed and finished within a limited time window after batching. Planning and coordination with the supplier are essential.
Lead Time and Delivery Windows
Arrange delivery at least a few days in advance for most suppliers. Confirm the expected arrival window, available truck sizes, and any traffic or route restrictions that might affect timing. For large pours, consider multiple trucks scheduled sequentially to maintain a continuous pour.
Weather Considerations
Temperature and precipitation affect workability and curing. Cold weather may require additives and heated trucks; hot weather may require retarding admixtures and shaded staging areas. Avoid scheduling major pours during heavy rain or extreme heat when possible.
Site Preparation and Access
Proper site preparation speeds delivery and helps maintain concrete quality.
Access and Staging
Ensure trucks can access the site directly or a short distance from the pour area. Clear obstacles, secure turning radii, and provide stable ground for heavy vehicles. If trucks cannot get close enough, plan for pumps, conveyors, or wheelbarrows to move concrete from the truck to the placement area.
Pouring Methods: Chute, Pump, or Wheelbarrow
Chutes are standard for short drops from the truck. For longer reaches or confined areas, concrete pumps (line or boom pumps) provide fast, continuous placement and reduce manual labor. Pumps require planning for setup space and clearance.
Tips for a Smooth Concrete Delivery
- Confirm mix design and any admixtures with the supplier before dispatching the trucks.
- Have tools and finishing crews ready before the truck arrives—no waiting on crews.
- Designate a competent person to receive the delivery, check tickets (mix, strength, quantity), and manage placement.
- Communicate clearly with drivers about access routes, hours, and staging areas.
- Plan for cleanup: washout must be contained to avoid environmental contamination—use designated washout pits or tanks.
Environmental and Safety Considerations
Concrete delivery and placement carry environmental and safety responsibilities. Protect nearby water sources from washout contamination, and comply with local regulations for concrete waste. On-site safety includes PPE (gloves, eye protection, boots), traffic controls for trucks, and training for pump operators and finishers. Be mindful of the risks of skin contact with wet concrete; it can cause burns or irritation.
Conclusion
Successful concrete delivery depends on accurate calculations, selecting the right delivery method, careful scheduling, and thorough site preparation. By coordinating with your supplier, planning access and placement, and following best practices for safety and environmental protection, you can ensure your concrete arrives on time and performs as expected. Proper preparation today saves time, cost, and headaches tomorrow.
