3000 psi - Mostly used for footings and residential applications
3500 psi - Most commonly used for flatwork, footings and foundations
4000 psi - Most commonly used for slabs on grade, walls and commercial parking lots
4500 psi - Recommended for suspended garage floors and other elevated structures
5000 psi - Most commonly used for projects where high strength is critical
Concrete additives can improve the overall workability of a concrete mix by enhancing certain properties allowing you to achieve a variety of results.
Some of the additives we use include:
Air entrainment - Helps prevent freeze/thaw cracking
Fly ash - Commonly added to the cement portion of the mix
Water reducer - Gives concrete more workability without weakening the mix
Superplasticizers - Allows high slump concrete without added water
Retarder - Slows the curing process for long-distance delivery or to give the contractor more time to work the concrete
Accelerators - Increases the rate of early strength development and/or shortens setting time
Fiber - Protects against plastic shrinkage and cracking.
Structural Fiber - Reinforces concrete and potentially reduces the cost of wire mesh
Corrosion Inhibitors - Reduces the corrosion of steel reinforcement
Water Proofing - Allows for water proofing of concrete slabs
Hot & Chilled water - Allows placement of concrete during extreme temperatures
High Early Mixes
When design strength needs to be achieved in less than 28 days, our MoDOT-approved High Early mixes will achieve design strength in 7 or as few as 3 days. Our High Early mixes get strength fast to help you complete the job faster.
We offer specialty mixes such as lightweight concrete, colored concrete, exposed aggregate and many others.
We offer many concrete products including curing compounds, sealers, loop ties, chairs, anchor bolts, rebar (pre-cut lengths or by the ton) and expansion joints. One call and we will deliver to your jobsite.
Columbia Ready Mix recycles concrete into decorative and structural blocks of various sizes and patterns. See flyer
Columbia Ready Mix can even handle your small landscaping needs offering decorative rock of various types and sizes.
To place your order, call our Dispatch team at 573-445-3901.
Whether you need a standard mix or a custom mix, our team has the expertise and experience to make your job a success. From start to finish, we will supply your project with the quality and service you deserve. We’ve worked with contractors of all sizes and capabilities, and can recommend the right one for your project.
When it comes to large commercial or DOT projects, our team is eager to help. We can help identify and meet specifications or deadlines for jobs of any size.
If you are bidding a large project, please contact the sales representative in your area.
ON-TIME DELIVERY: When you place your concrete order, be sure to have precise delivery directions ready. Con-Agg highly recommends placing your order at least 24 hours in advance to ensure on-time delivery.