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The 73-story World Trade Tower in downtown Los Angeles is the
tallest building west of the Mississippi River, and was built using
Vac-Lite structural lightweight concrete.
Over one million cubic yards of Structural Lightweight Pumice
concrete has been placed successfully in California high-rise
construction that was vacuum saturated by the "Vac-Lite"
vacuum processing system.


"VAC-LITE"

"VAC-LITE" is the trade name for a naturally occurring structural lightweight aggregate mined by California Lightweight Pumice, Inc. "VAC-LITE" is produced at our state-of-the-art vacuum processing plant for pumice aggregate located in Little Rock, CA and is processed and distributed exclusively by California Lightweight Pumice, Inc.

Unfortunately, the general name, "Pumice" is applied to a variety of material, of different purity and differing chemical makeup. This particular deposit, by the workings of nature over a period of time, is of a uniformity and purity almost unmatched elsewhere in the world.

"VAC-LITE" is a strong, durable, porous glass Pumice aggregate of volcanic origin. An ideal Natural material for use in structural lightweight concrete. With the continuing increase in energy costs, the use of a natural aggregate marks a return to the economic principles associated with the use of lightweight concrete, pumice was used in ancient Rome over 2,000 years ago in the construction of the Pantheon, the Coliseum, and the immense vaults of the public baths and many other notable structures still standing today.

"VAC-LITE" produced by California Lightweight Pumice, Inc. meets or exceeds the requirements established by the American Society of Testing Materials for use as an aggregate in structural concrete and concrete block. This aggregate has been approved for use by the International Conference of Building Officials and by the Department of Building and Safety, City of Los Angeles.



PUMICE - A strong, durable porous glass aggregate of volcanic origin. An ideal natural material for use in structural lightweight concrete. With the continuing increase in energy costs, the use of a natural aggregate marks a return to the economic principles associated with the use of lightweight concrete. Pumice was used in ancient Rome over 2,000 years ago in the construction of the Pantheon, the Coliseum, the immense vaults of the public baths and many other notable structures still standing today. Pumice aggregate concrete has been used in Germany and France since 1850 and is still a major construction material.
AGG-LITE
VAC-LITE
- The trade names for the pumice aggregates being produced meets or exceeds the requirements established by the American Society of Testing Materials for use as an aggregate in structural concrete and concrete block. This aggregate has been approved the City of Los Angeles under General Research Report, RR23908, Construction Specifications Institute Report 03050, I.C.B.O. Evaluation Service report number 4229, Title 24, Part 2 California Building Standard Commission and approved by the Underwriters Laboratories Inc. for a 2 hour and 29 minute fire endurance rating in composite floor and roof systems per UL 263 (ASTM E-119).
UNIT WEIGHT - As low as 60 pounds per cubic foot are possible with pumice aggregate concrete. There is a corresponding decrease in strength as the volume of pumice is increased as indicated on the Strength vs. Unit Weight graph (see "Engineering Data" page.)
COMPRESSIVE
STRENGTH
- In excess of 4,000 pounds per square inch can be attained with pumice aggregate concrete at a unit weight in the range of 110 pounds per cubic foot.
WORKABILITY - Is excellent even at extremely low slump due in part to the spherical shape of the aggregate particles.With properly designed and batched mixes there is no segregation or excessive surface water. Hardened pumice aggregate concrete has the unique capability of being nailed, sawed or drilled with ordinary hand tools.

 

California Lightweight Pumice, Inc., San Clemente, CA 92672