 |
 |
 |
|
U.S. Gypsum GARDEN CAST 50 lbs.
GARDENCAST™
Gypsum Cement
Product Data
A High-Performance Time Saving Solution for Your Exterior Casting Needs.
— Rapid setting cementitious material when used with sand aggregate.
— Quick demolding capability increases productivity 300% over conventional cements.
— Excellent resilience and chip resistance.
— Ideal for free standing, exterior casting, and decorative exterior figurines.
— White in color.
GARDENCAST is similar to FAST CAST except it is a white-colored product
to be used with white sand. Specially Designed for free-standing, solid
cast outdoor statuary. Produces strong, hard casts that sets rapidly
and can be demolded in one hour after set, resulting in increased
productivity versus conventional cements. Must be used with sand
aggregate.
Technical Properties English Metric
Use Consistency (parts of water by weight per 100 parts GARDENCAST and Sand) 12.5 12.5
1 Hr. Compressive Strength 2,500 psi 17.2 MN/m2
Dry Compressive Strength 8,000 psi 55.2 MN/m2
Maximum Setting Expansion 0.10% 0.10%
Density Wet 131.0 lb/ft3 2.10 g/cm3
Dry 110.0 lb/ft3 1.76 g/cm3
Set Time* 25-35 min. 25-35 min. 25-35 min.
General Required Mix Design 50 lbs. GARDENCAST Gypsum Cement
Directions and 50 lbs. sand (fine aggregate)
Guidelines 1-1/2 gallons (U. S.) water (12.5 pounds)
(Water measurement may have to be adjusted slightly for particle size and water content of sand. Refer to IG779
Technical Bulletin for details.)
Sand should be clean, dry, pre-washed, and properly-sized. It should be free from dolomitic and aluminum conta-
mination and conform to ASTM C33 (see graph below).An example of a suitable commercially available sand is All
Purpose Sand. GARDENCAST Gypsum Cement must be used with sand to maximize durability.
Mechanical Mortar Mix Procedures
1With the mixer operating, add half of the sand to the water.
2 Carefully strew or sift the GARDENCAST Gypsum Cement into the mixer. Do not soak.
3 With the mixer operating, carefully add the remainder of the sand.
4 Mix thoroughly until lump free and slurry becomes pourable—3 to 4 minutes, but no more than 5 minutes.
5 Carefully pour the slurry into the mold to prevent entrapped air. Agitate the filled mold to assist in removing any
noticeable air bubbles.
6 Set time is 25-35 minutes. Allow casts to remain in the mold for approximately one hour after set to ensure the
adequate “green strength” necessary for demolding.
7 Demold and transfer the cast to a suitable drying area. Bench dry the castings to a constant weight before
packaging for shipment. If the drying time must be accelerated, castings can be placed in a drying room
capable of producing both increased air circulation and drying temperatures.
Maximum temperature in a drying room should not exceed 120 °F.
Mechanical Mixing—Variable
1 Add the sand to the water. Speed Propeller Type Mixer
2 Carefully strew or sift the GARDENCAST Gypsum Cement into the mixing container. Do not soak.
3 Use a high-speed, variable-drive propeller mixer to disperse the slurry. Mix for 3 to 4 minutes, but no more than 5 minutes.
4 Mix thoroughly until lump free and slurry becomes pourable—3 to 4 minutes, but no more than 5 minutes.
5 Carefully pour the slurry into the mold to prevent entrapped air. Agitate the filled mold to assist in removing any noticeable air bubbles.
6 Set time is 25-35 minutes. Allow casts to remain in the mold for approximately one hour after set to ensure the adequate “green strength” necessary for demolding.
7 Demold and transfer the cast to a suitable drying area. Bench dry the castings to a constant weight before packaging for shipment. If the drying time must be accelerated, castings can be placed in a drying room capable of producing both increased air circulation and drying temperatures. Maximum temperature in a drying room should not exceed 120 °F.
Precautions
1Water purity is important.Water should be as pure as possible. Typically, if water is drinkable, it is probably suitable for mixing the product. Water contaminated with organic impurities, soluble salts, and other chemicals may cause detrimental effects to GARDENCAST Gypsum Cement.
2 Proper mixing ensures dispersion of the GARDENCAST Gypsum Cement powder into the water. Accurately weighed water, powder, and sand is necessary to assist in fabrication of quality castings. Refer to required mix design for proper amount of mixing water.
3Timing mix cycles is essential. Mechanical mixing methods must be used. Do not mix by hand.
4 Pour pieces in one continous pour.
5GARDENCAST Gypsum Cement is not a suitable product for the fabrication of bird baths, water fountains, or other applications where constant exposure to water occurs; nor is it suitable for casting planters or flower potting con-tainers.
6GARDENCAST Gypsum Cement is not suitable for structural or non-structural exterior architectural applications.
7 Do not use GARDENCAST Gypsum Cement for below grade applications.
8 Do not use sealers or coatings on GARDENCAST Gypsum Cement pieces.
9 Do not use aggregate that does not meet the size requirements of ASTM C33.
10 Color of the final piece will be dependent on the color of the aggregate used.
Please note: 100lb bags must be split and repackaged to be shipped UPS. Please expect an $18.00 Handling charge when ordering 100 lb bags shipped UPS. |
|
|
|
|
|
|
|
|
