Masonry Magazine January 1974 Page. 58
KLENZTONE SYSTEMS
THE AMAZING NEW KLENZTONE SYSTEMS AUTOMATIC CLEANING UNIT!
NEW REVOLUTIONARY PROCESS CLEANS EASILY-CLEANS ECONOMICALLY
VEHICLE OPTIONS:
• STAKE BED TRUCK
• TRAILER
• ENCLOSED Van
SYSTEM TOTALLY INTEGRATED
Large Masonry Project
(Continued from page 51)
Six holes were drilled, filled with the epoxy gel, and then the wire was inserted. A one-week waiting period was allowed for the epoxy to gain strength, as its initial cure was slow during low daytime temperatures averaging 40°F. In a week the epoxy attained a tensile strength of approximately 5,000-6,000 psi.
To check the strength of the epoxy, a hydraulic jack was used to determine the resisting force of the plug. As the pull on the wire increased, the epoxy which held it stretched. Pressure was increased. An even greater pull up to 7,500 lbs. elongated the wire and epoxy, but the wire did not pull out from the gel nor did the plug move.
The other plugs tested showed similar results. There were no failures when tested up to a 7,500-lb. pull. The stainless steel wire has an ultimate strength of 96,000 psi.
With such high holding capacity demonstrated for each wire, the engineer decided that 3,500 holes were enough to resist a pull of 26 million Ibs. For every tenth course of brick, a row of holes was drilled 4' apart around the building periphery. Work was done from a 40' x 40' scaffold erected by the contractor. A three-man crew handled the entire drilling and grouting operations.
The epoxy gel was prepared in the contractor's heated trailer when the ambient temperature was below 60°F. A mason mixed the two-component, 1:1 ratio epoxy using a paddle and slow-speed drill. He then packed the gray-colored gel into caulking guns. Outside the trailer, he filled the holes at a two-per-minute rate. Then from a supply of double-twisted wires he carried in his pocket, he pushed one into each hole with the two strands pointing outward. Grouting continued through clear weather when the temperature was above 35°F.
Thereafter, bricklaying proceeded as usual for ten courses, up to the next level of projecting wires. Then the tie-back and bricklaying sequence was repeated.
Once the holes were grouted, bricklaying followed without delay. The epoxy cured more rapidly now than for the test holes as the heat from inside the building raised the temperature of the concrete wall housing the plugs. On the outside the plugs were protected from low temperatures by the brick veneer. Work began in the first quarter of 1973 and was completed in the spring.
CREDITS: Karel B. Philipp, AIA, Union, N.J., architect; Wenson & Wenson, Rahway, N.J., consulting structural engineers: Pastor Construction Co., Irvington, NJ., general contractors; C. Torsiello & Sons, Springfield, NJ., mason contractor.
WE CLEAN EVERYTHING! THE PATENTED KLENZTONE SYSTEM AND PRODUCTS DESIGNED FOR CLEANING ALL MASONRY SURFACES EFFICIENTLY AND ECONOMICALLY.
The system is engineered to utilize muriatic acid, detergents, solvents or other non-viscous materials either singly or in combination by metered homogenization at the nozzle of the spray wand.
FOR COMPLETE INFORMATION AND FREE DEMONSTRATION, TELEPHONE OR WRITE: MR. ARBOGAST.
• K & E CHEMICAL COMPANY, INC.
MIDWEST REGIONAL OFFICE: 2250 EAST DEVON AVENUE SUITE 322-A
DES PLAINES, ILLINOIS 60018 TELEPHONE: (112) 297-4790
Project Uses 3 Million Masonry Units
Nearly 3 million concrete masonry units valued at more than $1.25 million will be used to veneer the exterior of Starrett City in Brooklyn, N.Y., one of the largest housing developments undertaken anywhere in the world in recent years. The 46 apartment buildings will be sheathed entirely in split rib block, ground face block and other special shape architectural masonry units manufactured by Plasticrete Corp., Hamden, Conn. The order is the second largest in Plasticrete's 50-year history, exceeded only by an order for some 5 million units for Co-Op City, Bronx, N.Y.