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Two-Way Hardwall Gypsum Plaster

Two-Way Hardwall Gypsum Plaster
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09 23 00/NGC Basecoat Plasters DESCRIPTION DESCRIPTION GOLD BOND BRAND GYPSOLITE PLASTER Gold Bond BRAND Two-Way Hardwall Plaster is a basecoat plaster which requires the job site addition of an aggregate and water to provide working qualities and is designed for interior use over all accepted plaster bases. It may be applied by hand or used through pump/spray plastering machines. ADVANTAGES Controlled Uniformity Two-Way Hardwall Plaster is set-stabilized and adjusted for market requirements and seasonal changes. When mixed with sand or other aggregate it has uniform working qualities and excellent spread. Gold Bond BRAND Gypsolite is a lightweight gypsum basecoat plaster mixed at the mill with correctly sized and proportioned perlite aggregate, requiring only the addition of water on the job. It is manufactured to be trowel-applied over gypsum or metal lath. ADVANTAGES Uniform Strength and Hardness Uniformity is ensured through exact proportioning and thorough mixing of graded perlite and gypsum plaster at the mill. Gypsolite provides a uniform base for the finish coat. Lightweight Gypsolite weighs less than half as much as sanded gypsum plaster, thus reducing the dead-load on framing. High Insulating Value Gypsolite has a “k” factor of 1.5 which provides about 3 1/2 times the insulating value of sanded plaster. Strength Two-Way Hardwall Plaster properly proportioned with aggregate forms a hard, durable base for the finish coat. Its high tensile and compressive strength results in increased resistance to minor structural movements, impacts and abrasions. Fire Resistance Two-Way Hardwall Plaster is essentially mineral in composition and will not support combustion. Specification Reference ASTM Designation C 28, “Gypsum Plasters”. Bag Weight 100 lbs. (45.4 kg) TECHNICAL DATA AGGREGATE PROPORTION AND ESTIMATED COVERAGE Coverage, Aggregate Sq. Yds. Sq. Ft. Proper Ton (Sq. M.) portions Plaster Base (Sq. M./Metric Ton) per Bag Thickness In. (mm) Sanded 1:2-1/2 Gypsum Lath 175-220 (161-203) 80-100 (7-9) 7/16" (11.1) Sanded 1:2-1/2 Metal Lath 90-125 (83-115) 40-55 (4-5) 9/16"* (14.3)* 175-220 (161-203) 80-100 (7-9) 9/16" (14.3) Sanded Brick & Clay Tile 1:3 Concrete Block *Measured from face of lath. NOTE: Sanded 1:2-1/2 means 1 part plaster to 2-1/2 parts sand by weight. GYPSOLITE ESTIMATED COVERAGE Plaster Base Coverage, Sq. Yds. per Ton (Sq. M/Metric Ton) Sq. Ft. (Sq. M.) per Bag Thickness In. (mm) 140-155 (129-143) 50-55 (4-5) 7/16" (11.1) 65-80 (60-74) 25-30 (2-3) 9/16"* (14.3)* Gypsum Lath WEIGHT COMPARISON OF BASECOAT PLASTERS Weight lbs. per cu. ft.(kg/m3) Lbs./yd. (kg/m ) 3/8"(9.5 mm) thick Lbs./yd.2(kg/m2) 1/2"(12.7 mm) thick Lbs./yd.2(kg/m2) 5/8"(15.9 mm) thick Lbs./yd.2(kg/m2) 3/4"(19.0 mm) thick 2 2 Wet Mortar Weight Weight lbs. per cu. ft. (kg/m3) Sanded 1.3 Gypsolite Regular 120 (1922) 14 (8) 19 (10) 24 (13) 29 (16) 140 (2243) *Measured from face of lath. 50 (801) 34 (18) 45 (24) 56 (30) 67 (36) Water Ratio 1.2 gallons of water per 25 lbs. of plaster. TECHNICAL DATA Metal Lath Dry Set Mortar Weight LIMITATIONS When used over metal lath, a sand float finish should be specified. A smooth-trowel finish is not recommended since the combination of a relatively soft (perlite aggregated) basecoat and a hard (smooth-trowel lime/gauging) finish has the potential for cracking and spalling of the finish coat. Fire Resistance Gypsolite has excellent fireresistive qualities and generally provides fire ratings higher than sanded plaster. Specification Reference ASTM Designation C 28 for “Gypsum Plasters”. Bag Weight 80 lbs. (36.3 kg) 25 lbs. (11 kg) 69 (1105) NATIONAL GYPSUM CONVENTIONAL PLASTER SYSTEMS 35 09 23 00 GOLD BOND BRAND TWO-WAY HARDWALL GYPSUM PLASTER

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PHYSICAL PROPERTIES OF BASECOAT PLASTERS (TYPICAL TEST RESULTS PER ASTM C 472) Two-Way Hardwall Plaster Properties Gypsolite Regular Mix Gypsum Plaster to Sand by Weight Mill Mix 1:1 1:2 Gypsum Plaster and Vermiculite Gypsum Plaster and Perlite Regular 100 lbs. (45.4 kg) 2 cu. ft. (.06 m ) 1:3 Masonry 100 lbs. (45.4 kg) 3 cu. ft. (.08 m ) 3 3 Regular Masonry 100 lbs. (45.4 kg) 100 lbs.(45.4 kg) 2 cu. ft. (.06 m ) 3 cu. ft. (.08 m ) 3 3 Approximate Compressive Strength lbs. per sq. in. (kPa) 900 (6201) 1600 (11024) 1150 (7923) 750 (5168) 500 (3445) 300 (2067) 900 (6201) 650 (4479)...

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