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  Suggested Solite® and Kenlite® Lightweight Aggregate Structural Specifications
  All lightweight aggregate shall be produced by the rotary kiln process and shall meet all the requirements of ASTM 330 (AASHTO M195). ASTM certification, verified by an independent testing laboratory within 2 years, shall be submitted to the architect/engineer at least 60 days prior to the start of the project. Concrete made from the aggregate with a cement content of 564 pcy (334 kg/m3) and approximately 6% air content shall have a minimum durability factor of 85% when tested in accordance with ASTM C 666.
  Materials shall be proportioned in accordance with AC1211.2 so as to produce concrete with the properties listed below:
  A. 28 day compressive strength

Calculated Equilibrium Density
ASTM C-567


3000 psi (21 MPa)


4000 psi (28 MPa)


5000 psi (34 MPa)


B. Air content determined in accordance with ASTM C 173 shall be 6-8 percent by volume.


C. Slump shall be as listed below:



on slabs


on vertical surfaces

D. Concrete cylinders shall be molded and cured in accordance with ASTM C 31 with the following exception: after 7 days of moist curing in the laboratory, the cylinders shall be removed from the moist room and cured at 50% ± 2 relative humidity and 73.4°F ± 2 (23 ± 1.7°C) until time of test.



E. The lightweight aggregate producer specified for the project shall make available to the architect/engineer tests conducted in accordance with ASTM C 496 indicating tensile splitting strength on concrete composed of coarse lightweight aggregate and natural sand in excess of .85 of the values called for in ACI 318 for the particular compressive strength called for in the specification (.75 for all lightweight concrete).