Ready Mix Concrete in Rockford, IL

Concrete is a construction material with a rich history, from the Roman Colosseum to the Hoover Dam. Materials used in the production of concrete have evolved throughout history as well. Concrete consists of a cementitious material combined with aggregates and water. In the early 1800's Portland cement was patented, creating the basis of the concrete that we still use today. Portland cements are graded by the properties that make them suitable for specific uses.

We typically use Type I or Type I/II for most work. Aggregates make up the bulk of concrete and also contribute greatly to the properties of the mix. The standard aggregates we use are Illinois Department of Transportation approved 'A' quality superstructure stone and IDOT approved natural sand.

For special applications we can produce concrete with the properties required for the success of your project. We have produced concrete for numerous projects that had very specific requirements, including the following recent projects:

Contractor Project Mix
Russell Construction Brandon Lock and Dam Scour Repair Placed underwater by divers
Holetc International Exelon LaSalle Nuclear Heavyweight 185 lbs. cu./ft.
Muffler Concrete Morris Healthcare Lightweight 110 lbs. cu./ ft.
Vissering Construction Central School 40% -50% cement replacement
White Construction Top Crop Wind Farm Reduced heat of hydration
Holtec International Exelon Braidwood Nuclear Heavyweight 160 lbs. cu./ft.
M.A. Mortenson Minonk Wind Farm Reduced heat of hydration
Valley Construction Exelon Braidwood Nuclear 10,000 PSI machinery pads

What To Know Before You Order | back to top

  • 'Half' Air: This is mainly used for interior slabs placed over non porous vapor barrier to slow bleeding.
  • Air entrainment: Micro bubbles are introduced into the concrete by an admixture, usually encompassing 5%-8% of the concrete volume. It is required in exterior concrete exposed to freeze-thaw and also makes foundation wall concrete more cohesive.
  • Bag mix: a bag of cement weighs 94 lbs. therefore 5 bag = 470 lbs. 6 bag = 564 lbs.
  • Calcium chloride: A chemical used to accelerate the set rate of the concrete, may be used in concentrations of up to 2%. This product may not be used when structure contains integral reinforcing steel.
  • Chips: Crushed limestone with 3/8" maximum aggregate size.
  • Compensated mix: A mix that replaces cement with water reducer, Fly Ash or GGBFS.
  • Curing: The maintenance of a satisfactory moisture-content and temperature concrete immediately after placing and finishing. The moisture can be retained by submerging in water, wet coverings, plastic sheeting or more commonly membrane forming curing compounds. Curing is an important part of concrete placement and can add significant durability to the finished product.
  • Fiber mesh: Plastic fibers of varied sizes added to the concrete to provide cracking and shrinkage resistance. Structural fibers can replace welded wire mesh and rebar.
  • Fly Ash: A material recovered from the smokestacks of coal burning power plants, when added to concrete it increases ASR and sulfate resistance, and makes concrete both stronger and somewhat slower setting.
  • NCA: Non Chloride Accelerator, accelerates concrete set in applications when calcium chloride may not be used such as concrete with integral reinforcing steel.
  • No air: Concrete with no air is utilized in footings and interior slabs which have no exposure to freeze thaw. No air concrete is required with the use of a troweling machine to avoid blistering.
  • Pea gravel: River rock with 3/8" maximum aggregate size.
  • PSI: This is concrete strength expressed in pounds per square inch, normally measured by compressing test cylinders until failure.
  • Sealer: In exterior applications, after a slab has cured for 28 days a concrete sealer should be applied to reduce the chances of scaling.
  • Slag: Granulated Ground Blast Furnace Slag or GGBFS, A material recovered from the manufacturing of steel, when added to concrete it increases sulfate and ASR resistance and increases strength. It can be used in higher replacement amounts than Fly Ash.
  • Slump: This is a measurement taken when concrete is placed into a 12" tall cone which is 4" diameter on top and 8" on the bottom. The cone is filled with concrete in three lifts and consolidated each time, the cone is lifted straight up and the difference between the concrete and the 12" tall cone is measured, the difference is the slump. Very stiff concrete for paving or curbs may be only 1" -2" slump, foundations and flatwork are normally placed in the 4"-5" range. Concrete that needs to be placed at more than a 5" slump will require a water reducer to be added at the plant or on site.
  • Super plasticizer: The most effective form of water reducer, used to make concrete more plastic while maintaining the concrete's designed water/cement ratio.
  • Water / cement ratio: The water content in the concrete mix (in lbs.) divided by cementitious material, 564 lbs. Cement/ 250 lbs. Water = .44 water cement ratio
  • Water reducer: An admixture which reduces the required amount of water in the concrete.


Be prepared to give the quantity of concrete you wish to order or have sufficient information (length, width, depth) for the dispatcher to calculate what is needed for the pour. The dispatcher is not responsible for the accuracy of calculated yardage, he/she is simply there to aid you in determining how much concrete is needed for your project.

Slab/Foundation Calculator

Cylinder Calculator


We do not accept checks. Accepted methods of payment are Cash, Visa, MasterCard, American Express, or Discover. Payment MUST be paid in full before or at time of delivery. Exceptions can only be made by prior arrangements with dispatcher or sales representative.

Demurrage Time:

Unloading time allowed is six minutes per cubic yard. Excess time is subject to charge.

Day: Mon-Fri
Rate: $2.00/min
Day: Sat
Rate: $3.00/min

Fuel Surcharge:

All loads will be subject to a Fuel Surcharge regardless of quantity.

Rate: $15.00/load
* Subject to change without notice

Concrete Placement

Concrete requires proper and adequate handling, placing, finishing, curing & protection after delivery.

Job Access:

The purchaser must provide suitable roadways or approaches to point of delivery beyond the curb line and on other than paved streets. We reserve the right to stop deliveries if the roadways or approaches are unsatisfactory to us.

  • Warning: This product that you have purchased and are using may be harmful to your health, and physical well being if not handled properly. If you should get any of this product in your eyes or in an open cut, wash affected area at once. You may wish to consult a physician. You should wear proper protective clothing to prevent prolonged skin contact with wet concrete. A skin burn requiring medical attention could result.
  • Deicing Agents: Of any type should never be used on concrete unless a proper sealer has been applied to that concrete. Deicers could cause spalling or peeling of the concrete surface and other damages.
  • Water: Added on the surface of the concrete while finishing may also add to the spalling or peeling of the concrete surface.
  • Guarantees: Coal City, Grundy County, and River Redi-Mix Guarantees that the materials used in the manufacturing of this concrete meet IDOT or ASTM Standards. We do not Guarantee the contractors workmanship or their placement.
  • Basis of Purchase: It should be understood that the volume of hardened concrete may be, or appear to be, less than expected due to waste and spillage, over excavation, spreading forms, some loss of entrained air, or settlement of wet mixtures, none of which are the responsibility of the producer.

Call Today

Grundy County Redi-Mix

(815) 942-4344

Morris, IL

Coal City Redi-Mix

(815) 634-4455

Coal City, IL

River Redi-Mix

(815) 795-2025

Marseilles, IL