Masonry Magazine December 1968 Page. 6
PCA Develops 'Jetset' Cement
A new type of cement that can be formulated to "set" as fast as desired, unlike regular cement, has been developed by the Portland Cement Association at its Skokie, III., laboratories.
PCA President Harry N. Huntzicker said that patent protection is being obtained and an extensive field testing program is under way.
The new cement, tentatively named "Jetset," produces either regular or lightweight concrete that can be walked on in 15 to 20 minutes, compared with several hours for conventional concrete, Dr. Huntzicker said.
"This will make it ideal for such uses as emergency repairs to airport runways and fast patching or repair work on busy highways," he pointed out.
He said that strength, durability, handling qualities, and appearance of "Jetset" concrete are nearly identical to those of concrete made with conventional cement.
Dr. Huntzicker predicted that the fast-growing precast and prestressed concrete industries will be major customers for the new product.
"Use of the new cement will help speed production of most precast concrete units and permit more frequent form turnover, thereby reducing capital outlay per unit of manufacturing capacity," he said.
He cited insulated lightweight roof decks as another significant market. "While regular Portland cement has certain advantages over competitive products like gypsum for producing lightweight roofs for industrial and commercial buildings, it has the advantage of slow set and low early strength," Dr. Huntzicker said. "The new regulated-set cement eliminates this competitive disadvantage."
He estimated that concrete's share of this 865 million sq. ft. roof market conceivably could increase several times over its present 10 percent.
'Innsett' System Demonstrated
A new system of building masonry walls was demonstrated to a group of Scandinavian engineers during their recent visit to the office of Campbell Modular Building Inc. in Detroit. The new system, called Innsett, is one of many innovations being used to build Nagel Plaza, a low cost demonstration housing project constructed in Detroit by Campbell Modular Building Inc. Watching the unusual Innsett construction are, left to right, Henry Marraffa, technical representative of Universal Building Products Corp., which developed the Innsett system: Professor Bengt Erik Carlsen, of the Danish Engineering Academy in Copenhagen, who led the tour: H. Fred Campbell, chairman of Campbell Modular Building Inc. and the Campbell Group of which the firm is a member; and Rudolph E. Carter, chairman of Universal Building Products Corp.
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