Masonry Magazine July 1973 Page. 16
The Perlite Way to Fill a Cavity
Heat transmission can be reduced by 50% or more when silicone treated perlite loose fill insulation is poured into the hollow cores of concrete block or cavity type masonry walls. In fact, cavity walls of face brick and tile show a 63% reduction! But that's not all. Silicone treated perlite loose fill insulation is water repellent-indefinitely.
Specs call for a concrete block wall? Perlite loose fill insulation can help too! By filling the core holes with perlite loose fill insulation your fire rating will be doubled to 4 hours and your "U" factor improved by 54%. And you don't have to worry about permanence. Silicone treated perlite is inorganic and rot, vermin and termite proof. And it's non-combustible with its fusion point of 2300°F.
Even a veneer wall of brick and concrete block can show a 52% improvement in insulating value when filled with loose fill perlite. Don't worry about settling - silicone treated perlite supports its own weight in the wall without settling - and it's easy to handle too! Thanks to its countless glass-like cells it's light-weight and easily poured. It's quick-it's inexpensive and it's permanent-the perfect material for insulating masonry walls.
Perlite Institute, Inc.
45 West 45th Street
New York, N.Y. 10036
16
212-265-2145
Life Manor Apartment
Series of bays at the side of the Life Manor tower illustrate the angles that help tenants enjoy a more panoramic view. helps to beautify the landscaped grounds. Mason contractor Robert Barkshire (MCAA) developed a highly efficient system for the masonry panel wall construction. All brick exterior walls were prefabricated in assemblies one story high and one bay wide. They were transported from the panel plant to the job site by truck, lifted into place by crane, and fastened to the outside of the building.
"Our reason for going to a panel method of construction on this project was due to the fact that we had seven stories to build of masonry bearing walls," explained Barkshire. "Also, the walls had 45-degree offsets at each apartment. We could not use jack lines or any other type of conventional control as walls were built ahead of the rest of the building. We had only about one-quarter inch tolerance on our window openings, and to do this with a conventional method would have been impossible.
"We could not think of any way to have better control than to precast the piers and lintels and install them as a unit," Barkshire continued. "This method also saved a lot of construction time. The seven stories were completely framed in nine weeks. Using a conventional system would have taken at least twice as long.
"We have completed several excellent projects in the Northwest using this method and feel sure this type of construction will be more widely used. In certain instances it has very definite advantages."
Glass salvaged from solid waste is finding a new use in the manufacture of decorative construction blocks. In a cooperative study by American Cement Corp. and Glass Containers Corp., amber glass fragments were crushed for blending with standard pea gravel and mixed with finely ground specialty high-alkali Type 1 Portland cement. Blocks containing 35 per cent glass by weight were produced for use in an industrial park in southern California. A pleasing decorative effect was produced by the exposed glass fragments. Satisfactory structural standards also were achieved, according to the two manufacturing firms.
masonry
July, 1973