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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More about dollars and cents: We recommend users of early versions of Internet Explorer to update to Version 10 or later. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the specification. Q-ROK comes in 3 grades, 1, or fine; 2, or medium and 3, coarse.
Aggregate 8c97 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 sandblasting sand is graded from medium about mm down to a very fine powder. 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 astj 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.
What this means in human readable terms: Distribution of the PDF is not permitted. Now, gypsum plaster is only avaiable in 50 lb. Number two is all mediumand number 1 is all fine. The fineness modulus, friable particles, light constituents, xstm impurities, material soundness, and sieve analysis of the aggregate shall be tested to meet the requirements prescribed.
The varied grits, or different particle size adds increased strength and crack resistance to stucco. What I am trying to say with all of this is that mortar can develop incredible strength by simply varying the grit of the sand, and using silica sand. His formula is 7 bags of varied grits of sand, that is one bag each of 1, 2, etc. Use on a local area network or other network is not permitted.
The sand is then graded qstm less than 2. To put this into perspective, the footers under your house are probably about 2, PSI.
ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. Link to Active This link will always route to the current Active version of the standard.
The reason is that the smaller grains fill in the voids when the mortar is packed down. Historical Version s – view previous versions of standard.
ASTM C to the rescue. Fine powder is packaged as silica fines. The main difference is that number 3 is all the same size about 3 mm. Sand like Q-ROK is used in stucco finishes, but the grading is different. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
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. This abstract is a brief summary of the referenced standard. The word “pound” in Spanish, Italian and Latin is “Libra”. Imagine how strong other high abuse applications can be, such as mud floors, simply by spending a few bucks for graded silica sand.
Have you ever wondered why the word “pound” is abbreviated lb. This option is mobile friendly and compatible with all devices, including mobile tablets and smart phones. This is what we usually use in our stucco finish coat.
ASTM C – 15 Standard Specification for Aggregate for Job-Mixed Portland Cement-Based Plasters
Q-ROK is graded quartzite, which means crushed quartz or crushed white sandstone. ASTM C is currently being specified a lot for interior basecoat plaster in Federal government work.
When used as a stucco finishdifferent grades are usually mixed together to vary the size for improved strength and appearance. 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. The breaking strength of these boats was well over 10, PSI.
The PDF Download is licensed per individual in which the individual can place on up to four electronic devices for their personal use. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
Also, since the sand is irregularly shaped, larger width particles can pass through the sieves. For a volume license the PDF is licensed to the person in which it is assigned.
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.
I know somebody out west who plasters boats. 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.