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Post-Tension


Shrinking Compensating Concrete: Type (E1) K for a Variety of Uses – Conforms to ASTM C 845

Use Type-K shrinkage compensating concrete technology in all types of structures to counteract drying-shrinkage cracking.  In shrinkage-compensating concrete, theconcrete expands slightly during the first week after it is cast, and when restrained (internally or externally), it places the concrete mass into compression. The mass returns to its original size, when the effects of drying shrinkage occur. The result is a concrete that can minimize drying shrinkage cracks and offer advantages in design and construction over portland cement. By designing & producing controlled compressive stresses in the concrete, shrinkage compensating concrete reduces the detrimental tensile forces which lead to shrinkage cracking. If the expansion is sufficient to keep the concrete in compression, no cracking can occur. As long as the drying-shrinkage tensile stress in the concrete are lower than the tensile strength of the concrete, the concrete will not crack.  On Slab On Grade (SOG) applications, shrinkage compensating concrete eliminates curling, per ACI 223.

You’ll find that over the years, it has been used all over the country in a variety of applications, including the Chicago O’Hare parking structure, Love Field in Dallas, Texas, All Saints Episcopal Church in Palo Alto, J. Paul Getty Museum in Malibu, Calif., The Forum, in Los Angeles, Calif., Boston Gardens in Boston, Mass, and the water treatment plant in Atlanta, GA.

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