ASTM C Standard Specification for Aggregate for Job-Mixed Portland Cement-Based Plasters. Questions and answers on Stucco and Plastering March, Graded sand for cement-plaster and interior plaster. ASTM C , and ASTM C Find ASTM C products and abstract using the BuildSite database. Get the right product for the spec.
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Number two is all mediumand number 1 is all fine. Q-ROK comes in 3 grades, 1, or fine; 2, or medium and 3, coarse. Distribution of the PDF is not permitted. The varied grits, or different particle size adds increased strength and crack resistance to stucco.
Link to Active This link will always route to the current Active version of the standard. Fine powder is packaged as silica fines.
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Historical Version s – view previous astn of standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. To put this into perspective, the footers under your house are probably about 2, PSI.
His formula is 7 bags of varied grits of sand, that is one bag each of 1, 2, etc.
This is what we usually use in our stucco finish coat. For a volume license the PDF is licensed to the person in which it is assigned. The fineness modulus, friable particles, light constituents, organic impurities, material soundness, and sieve analysis of the aggregate shall be tested to meet the requirements prescribed. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
JavaScript seems to be disabled in your browser. The reason is that the smaller grains fill in the voids when the mortar is packed down. Aggregate subjected to five cycles of the soundness test shall show a loss, when weighed in accordance with the grading of a sampling complying with the limitations set forth. This chart is completely ambiguous if you do the math, but the idea is that the sand is graded from coarse down to fine powder.
Graded sand for cement-plaster and interior plaster, ASTM C , and ASTM C
When used in a cement basecoat for high strength applications such as stucco floors or cement boats, the various grits can quadruple the compressive strength of Portland cement mortar. Have you ever wondered why the awtm “pound” is abbreviated lb. Silica sand usually crushed quartz or sandstone is passed through various screen sizes and measured as to the percentage of what size the grains are.
This specification covers natural or manufactured aggregate for use in job-mixed base and finish-coat full thickness Portland cement, Portland cement-lime and modified Portland cement plasters. The PDF Download is licensed per individual in which the individual can place on up to four electronic devices for their personal use.
Aggregate subjected to five cycles of the soundness test shall show a loss, when weighed in atsm with the grading of a sampling complying with the limitations set forth.
When used as a d897 finishdifferent grades are usually mixed together to c97 the size for improved strength and appearance. More about dollars and cents: The fineness modulus, friable particles, light constituents, organic impurities, material soundness, and sieve analysis of the aggregate shall be tested to meet the requirements prescribed.
The breaking strength of these boats was well over 10, PSI. I know somebody out west who plasters boats.
ASTM C – 15 Standard Specification for Aggregate for Job-Mixed Portland Cement-Based Plasters
The main difference is that number 3 is all the same size about 3 mm. Another mystic secret revealed: Now, gypsum plaster is only avaiable in 50 lb.
Sand like Q-ROK is used in stucco finishes, but the grading atm different. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the specification.
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