Masonry Magazine August 2001 Page. 26
The Smart Masonry "Clean-Out" System
Patented ABS plastic T-Bolt, re-usable Nut & re-usable Transparent Window. Grout flow can be visibly monitored through the transparent "Window" virtually eliminating the problem of un-filled or honeycomb cells. No damage to face of block. (No nails!)
Fixing voids after removal of plywood covers can cost thousands of dollars. No more blow-outs. Cheaper Than Plywood & Nails. Eliminates costly bow outs that require chiseling and grinding.
Advanced Placement allows for readiness to pour immediately after inspection. Quick Installation can be installed & removed in seconds, vastly reducing labor costs. T-Bolt & Nut can also be used with Plywood Covers.
Are you high lift grouting? You should be! Studies actually show a 25%-30% increase in productivity when high lift grouting as opposed to low-lift grouting.
For more information (Free Video & Brochure) on the revolutionary Smart Masonry Clean-Out System & High Lift Grouting, call Smart Masonry Products • 1-800-858-5995
CELL VENT
Weep Hole Ventilator
5 Colors Available: Clear, Almondo Tan, Brown, Gray
Easy moisture drainage. Easy installation. Custom sizes and colors available. Ideal for most masonry applications. Available nationwide. Distributors wanted.
Call to request samples and literature.
U.S. Wire
731 N Prior Avenue
St. Paul, MN 55104
Phone: (651) 646-4523
26 MASONRY - AUGUST, 2001
STERLING
The "TOUGH GUY"
Dual Handle Rolling Mortar Tubs. Versatile design 7 cu. yard capacity.
Stationary and other rolling models available - call or fax for complete information.
STERLING
HANDLING EQUIPMENT INC.
P.O. BOX 090438, MILWAUKEE, WI 53209
Phone 414-228-7728
Fax 414-228-9032
www.sterlingtoughguy.com
vip@sterlingtoughguy.com
Repellents/continued from page 23
evaporates. The dissolved calcium carbonate it carries does NOT evaporate. Instead, it builds up on the surface - a hard white deposit immune to conventional cleaning agents.
In the same way, water can dissolve and mobilize the natural or added metallic elements that create color in brick. In light or buff-colored brick, you get greenish vanadium stains. In tan or brown brick, brown manganese stains result. They're difficult to lose.
Where there's water and dampness, there's potential for mold, mildew and algae. These don't just deface masonry. They dissolve and digest it as they spread across the surface.
Rain can mobilize the atmospheric staining deposited on buildings over the years. Water carries dissolved grime into the masonry pores. Absorbed staining is tough to get out 100 percent, although some poultice cleaners come close.
That's also how rust stains occur. Water rusts metal on or inside masonry and carries the rust into the substrate. It can also "rust" naturally occurring minerals in the masonry, causing stains.
Subflorescence occurs when, like efflorescence, water dissolves or deposits salts in the masonry. Coatings, either man-made or created by dirt and pollution, stop the salts from recrystallizing on the surface.
Instead, they build up in the masonry pores with each cycle of wetting and drying. After repeated wet/dry cycles, there's enough buildup to weaken the masonry's internal strength. You get cracking, spalling and delamination.
Cold weather creates a similar danger. Water, absorbed into masonry, freezes and expands. Over time and repeated freeze/thaw cycles, the masonry's internal structure weakens. Again-cracking, spalling and delamination.
Water even encourages plants to take hold. Plants deliver water directly into the masonry.
When rain combines with air pollution, you get acid rain. Limestone and marble are particularly vulnerable because they are acid-soluble - as is mortar. In recent decades, acid rain has become a huge problem for conservators of monumental architecture.
When water penetrates deeply enough to reach structural metal, you've got safety as well as appearance.