Lightweight Concrete

Lightweight concrete can offer economical advantages for engineering applications. Compared to normal weight concrete, with a density ranging from 140-150 lbs/ft3, structural lightweight concrete has an in-place density of 90-115 lbs/ft3. Structural lightweight concrete mixes can be designed to achieve strengths, durability and other performance characteristics that are similar to normal weight.

Added to this, structural lightweight provides more efficient strength-to-weight ratios, allowing for smaller load-bearing elements such as footings and columns, less reinforcing steel and a lower volume of concrete. This in turn helps to achieve lower project costs.

In buildings, structural lightweight concrete often ensures a structure with higher fire-ratings and higher R-values for walls because of improved insulation properties. Structural lightweight concrete has been used successfully for bridge decks, piers and beams, slabs and wall elements in both steel and concrete frame buildings. In addition, it is also used for parking structures, topping slabs and composite slabs on metal decks. Any concrete mixture considered for a specific application should always be evaluated for the service environment in which it will be placed.

For more information about this product, please contact us or call our National Customer Service Center at (800) 242-7733.

American Concrete Institute Certified Concrete Contractors

ACI Concrete Flatwork Certification Program

County Materials is a strong advocate for continuing education and a leader in providing industry resources and education for our customers.

The ACI began the Concrete Flatwork Finisher/Technician certification program in 1987 to provide a basis for certifying concrete finishers and improve the quality of concrete construction. More project owners and construction professionals specify that contractors have ACI-certified flatwork finishers onsite performing the work; they recognize the value of using ACI-certified finishers and technicians. ACI recertification is necessary every five years, and requires successful completion of a written examination. More information about the ACI Concrete Flatwork Certification Program is available at:

The following professional concrete contractors have successfully completed the American Concrete Institute (ACI) Concrete Flatwork Certification Program:
(Year listed after each certified business indicates the year they achieved certification)

  • Alan Iatonni Masonry (Irma, WI) Ph 715.297.776
  • Firkus Masonry (Stevens Point, WI) (2015)
  • Huotari Construction Ph 715.748.4000
  • SK Masonry (Stevens Point, WI) Ph 715.340.4449

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