Rev. 9-1-95
MASONRY COATING
728-B-039
The Standard Specifications are revised as follows:
SECTION 728, BEGIN LINE 1, INSERT AS FOLLOWS:
SECTION 728 -- MASONRY COATING
MATERIALS
CONSTRUCTION REQUIREMENTS
(a) Mass per liter (Weight per gallon).
(b) Viscosity in Kreb units.
(c) Mass percent pigment.
(d) Mass percent vehicle solids.
(e) Infrared spectra of vehicle solution.
Payment will be made under:
Pay Item ------------------------------------------------Pay Unit Symbol
Masonry Coating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .LS
Surface Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LS
SECTION 909, AFTER LINE 692, INSERT AS FOLLOWS:
a. Three concrete specimens, not less than 100 mm by 150 mm by 150 mm (4 in. by 6 in. by 6 in.), of the mix design for the structure shall be cast and cured. Fourteen days moist curing with a drying period at room temperature, 16EC to 27EC (60EF to 80EF), for 24 hours will be required before the specimens are coated with the applied finish. There shall be noexcessive oil on specimen forms.
The finish coating shall be applied to the sides of specimens at a spreading of 1.2 " 0.2 m5/l (50 " 10 sft/gal). Brush application will be permitted. Cementitious coatings shall be cured at room temperature and 50 percent relative humidity for 24 hours, at room temperature and 90 percent relative humidity for 48 hours, at room temperature and 50 percent relative humidity for four days for a total curing time of seven days. Other coatings shall be cured at room temperature for 48 hours after the completing of curing.
b. The specimens shall be immersed in water at room temperature for three hours, then removed.
c. The specimens shall be placed in cold storage at -26EC (-15EF) for one hour, then removed.
d. The specimens shall be thawed at room temperature for one hour.
e. Steps c. and d. above shall be repeated for a total of 50 cycles. At the end of 50 cycles, the specimens shall show no visible defects.
SECTION 916, AFTER LINE 65, INSERT AS FOLLOWS: