Masonry Magazine March 1962 Page. 16
STARK
Stark Structural Glazed Tile are produced mainly in vertical core type to assure better bonding, easier-less costly cutting, and solid bed and head joints. Write for complete catalog.
STARK CERAMICS, INC., CANTON 1, OHIO
Mortar Goes Modern
(Continued from page 12)
Over the nine-month period since its introduction. With its perfection of the new system, the Instant Crete Corporation expects to employ the bulk process for all buildings for which the material has hitherto been specified, according to Richard Goldberger, president.
One of the most significant cost-control elements cited by Mr. Goldberger centers around the fact that the "fixed proportion of ingredients in the pre-blended mix precludes on-the-job preparation of hit-or-miss blends which, owing to the inclusion of more cement than is specified, frequently run up contractors' costs."
The elimination of waste due to spillage when cement bags are broken open constitutes another important cost-control factor.
The completely enclosed 6x8 foot rectangular-shaped bulk storage silos have a capacity of twelve to twenty tons and stand twelve to eighteen feet high, depending on specific building requirements. When the masonry work on a structure is completed, the Instant Crete firm dismantles the silo and removes it from the site.
Resting on four steel corner posts, the silos are installed directly over the mortar-mixer. To fill the mixer with the dry cement blend to which only water must be added for a ready-to-use mortar the workman, by means of simple lever action, opens a side hatch in the silo. When the desired quantity of material has flowed into the mixer, the hatch is closed until additional mortar is required.
The cement blend is loaded into the silo through an intake valve at the top. A short hose extends from the end of the screw conveyor to the intake valve. Twenty tons of material sufficient to provide mortar to lay as many as 40,000 bricks, depending on thickness of mortar joint and absorptive qualities of the brick can be conveyed from truck to silo in twenty minutes.
Instant Crete's bulk process eliminates a variety of problems indigenous to either or both of the mortar-mixing systems now almost universally employed at building sites.
In the most commonly used method, sand is delivered in bulk and dumped at the site; the cement is delivered in bags; and the various other ingredients lime, waterproofer, and, depending on the mortar specifications, bonding chemicals, plasticity agents, and other additives are packaged either in bags or cans. Each delivery except that of sand entails unloading of individual units.
As a bag or can is used, it must be individually opened (and later disposed of) and the contents or, in the case of additives, a portion of the contents dumped or poured separately into the mortar-mixer. The sand is introduced into the mixer shovelful by shovelful.
Another difficulty encountered results from the fact that the sand conventionally used in mortar contains approximately six per cent moisture. The moisture content increases through absorption from the ground or exposure to the elements at a building site. As a consequence, in winter, sand piles often freeze overnight and must be thawed out in the morning before work can begin a costly, time-wasting procedure, it is observed.
This problem cannot arise with the bulk method, because the sand in the blend is off the ground, pre-dried and without moisture content is used in the blend, and the blend is completely protected from the elements.
The protection afforded by the bulk storage method also obviates another hazard experienced at construction sites. Although bagged cement may be covered with tarpaulins or drop cloths, these coverings provide only partial protection, with the result that rain frequently penetrates the bags or softens them, causing the cement to harden or the bags to break. In either instance, the cement is rendered useless.
HOHMANN ANCHORING DEVICE
SPECIALIST in manufacturing of Wal-Mesh-Lock-Mor Joint Reinforcement and all types of Anchoring Devices and Inserts for Masonry, Stone and Precast Panel Construction.
Anchors and Ties are available in Hot Dip Galvanized, Eraydo Zinc-Brass or Bronze and Stainless Steel.
HOHMANN & BARNARD OF ALA, INC
BIRMINGHAM 4. ALABAMA
Plants: Birmingham 4. Ala. Miami 47, Florida-Woodside 77. New York and Alexandria, Virginia
A DEPENDABLE name in Anchoring Devices-
Nationally since 1933
Write for our 20 Page ML catalog
REMEMBER THIS...
Regardless of What
Blade You Use!
A "LAMP CORD" EXTENSION WILL DESTROY YOUR MASONRY SAW MOTOR.. BUT QUICK
For profitable performance your Masonry Saw must have adequate voltage. This means FULL VOLTAGE of the source, and a PROPER SIZE EXTENSION CORD to transport the voltage to the Saw Motor. Inadequate power will cut Blade life in half!
Example: 11% HP Motor operating on 115 with 100 of cord REQUIRES #10 Wire, while if connected on 230 #14 is sufficient. With 2 HP Motor at 115 you must use #6 Wire for 115 Volts and #12 for 230 Volts. Greater lengths REQUIRE even larger wire!
MASONRY SAWS Diamond
Robert G. Evana Co.
Abrasive
TARGET
Safety-Blac
6024 Troost Ave
• Kansas City 10,
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MASONRY - MARCH