This standard is issued under the fixed designation C/CM; the number immediately following the designation indicates the year. Scope* C Specification for Aggregates for Radiation-Shielding. size distribution of fine and coarse aggregates by sieving. ASTM C pdf - Download as PDF File .pdf) or read online. ASTM C C / CM Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates Standard + Redline PDF Bundle, 10, $, ADD TO CART.
|Language:||English, Arabic, German|
|Genre:||Fiction & Literature|
|ePub File Size:||29.38 MB|
|PDF File Size:||9.54 MB|
|Distribution:||Free* [*Registration needed]|
(ASTM DESIGNATION: C a). This method covers the determi- nation of the particle size distribution of fine and coarse aggregates by sieving. CCIL / LABORATORY INSPECTION CHECKLIST. Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates. ASTM C APPARATUS. 1. BUNDLE AND SAVE: Item is contained in these product bundles. EN. Additional Comments: W/D S/S BY ASTM C/CM. Format. Details. Price (USD). PDF.
NOTE 2—It is recommended that sieves mounted in frames larger than standard See 8. The sieving action shall be such that the criterion for adequacy of sieving described in 8. NOTE 3—Use of a mechanical sieve shaker is recommended when the size of the sample is 20 kg or greater, and may be used for smaller samples, including fine aggregate. Excessive time more than approximately 10 min to achieve adequate sieving may result in degradation of the sample.
The same mechanical sieve shaker may not be practical for all sizes of samples, since the large sieving area needed for practical sieving of a large nominal size coarse aggregate very likely could result in loss of a portion of the sample if used for a small sample of coarse aggregate or fine aggregate.
ASTM C136.pdf - CCIL LABORATORY INSPECTION CHECKLIST...
Sampling 7. The size of the field sample shall be the quantity shown in Practice D75 or four times the quantity required in 7. The sample for test shall be approximately the quantity desired when dry and shall be the end result of the reduction. Reduction to an exact predetermined quantity shall not be permitted. As an option when such equipment is not available, instead of combining and mixing sample increments and then reducing the field sample to testing size, conduct the sieve analysis on a number of approximately equal sample increments such that the total mass tested conforms to the requirement of 7.
First test the sample in accordance with Test Method C through the final drying operation, then dry sieve the sample as stipulated in 8.
Procedure 8. NOTE 5—For control purposes, particularly where rapid results are desired, it is generally not necessary to dry coarse aggregate for the sieve analysis test.
The results are little affected by the moisture content unless: 1 the nominal maximum size is smaller than about Also, samples may be dried at the higher temperatures associated with the use of hot plates without affecting results, provided steam escapes without generating pressures sufficient to fracture the particles, and temperatures are not so great as to cause chemical breakdown of the aggregate.
Use additional sieves as desired or necessary to provide other information, such as fineness modulus, or to regulate the amount of material on a sieve. Agitate the sieves by hand or by mechanical apparatus for a sufficient period, established by trial or checked by measurement on the actual test sample, to meet the criterion for adequacy or sieving described in 8.
Aggregate with a very low or high fineness modulus is not as satisfactory for concrete as aggregate with a medium fineness modulus. Practical Grading Use aggregate with a grading such that a reasonable workability and minimum segregation are obtained in order to produce: This means that the particles pack together, leaving relatively large voids in the concrete.
Correct deficiencies by adding missing particles or screening out abundant particles. Related Papers.
Sieve Analysis. By Arissa Hanis.
Journal dox. By Rahat Rasha.
Aggregates for Concrete. By Ahmed Ahmed. Above the mesh, the air jet is distributed over the complete sieve surface and is sucked in with low speed through the sieve mesh.
Thus the finer particles are transported through the mesh openings into the vacuum cleaner. Types of gradation[ edit ] A Dense gradation A dense gradation refers to a sample that is approximately of equal amounts of various sizes of aggregate. By having a dense gradation, most of the air voids between the material are filled with particles.
A dense gradation will result in an even curve on the gradation graph. The curve on the gradation graph is very steep, and occupies a small range of the aggregate. This results in only coarse and fine aggregate. The curve is horizontal in the medium size range on the gradation graph.
Hm... Are You a Human?
This results in many air voids, because there are no fine particles to fill them. On the gradation graph, it appears as a curve that is horizontal in the small size range. Perforated plate sieves Perforated plate sieves conform to ISO and can have round or square nominal apertures ranging from 1 millimeter to millimeters. Limitations of sieve analysis[ edit ] This section does not cite any sources.
May Learn how and when to remove this template message Sieve analysis has, in general, been used for decades to monitor material quality based on particle size.
However, for material that is finer than mesh, dry sieving can be significantly less accurate. This is because the mechanical energy required to make particles pass through an opening and the surface attraction effects between the particles themselves and between particles and the screen increase as the particle size decreases.
Wet sieve analysis can be utilized where the material analyzed is not affected by the liquid - except to disperse it. Suspending the particles in a suitable liquid transports fine material through the sieve much more efficiently than shaking the dry material.
Sieve analysis assumes that all particle will be round spherical or nearly so and will pass through the square openings when the particle diameter is less than the size of the square opening in the screen. For elongated and flat particles a sieve analysis will not yield reliable mass-based results, as the particle size reported will assume that the particles are spherical, where in fact an elongated particle might pass through the screen end-on, but would be prevented from doing so if it presented itself side-on.
Properties[ edit ] Gradation affects many properties of an aggregate.In the air they carry out free rotations and interact with the openings in the mesh of the sieve when they fall back.
Summary of Test Method 4.
The smallest sieve opening through which the entire amount of aggregate is required to pass. Department of Defense. Also, samples may be dried at the higher temperatures associated with the use of hot plates without affecting results, provided steam escapes without generating pressures sufficient to fracture the particles, and temperatures are not so great as to cause chemical breakdown of the aggregate. Link to Active This link will always route to the current Active version of the standard.
Department of Defense. Scope 1.
Current edition approved Dec. Instructions are included for sieve analysis of such aggregates.