image-river sand

MATERIAL TESTING
Mechanical Analysis of Extracted Aggregate

AASHTO T 30-15

Standard Method of Tests

Mechanical Analysis of Extracted Aggregate

Standard AASHTO T 30-15

The determination of the particle-size distribution of fine and coarse aggregates extracted from asphalt mixtures using sieve analysis procedure is done based on the AASHTO T 30-15 standard.

Weigh Balance


Sieves


Mechanical Sieve Shaker - Recommended when the size of the sample is 20 kg (44 lb) or greater, but may be used for smaller samples as well including fine aggregate. It may be noted that excessive sieving time (more than approximately 10 min) using a mechanical sieve shaker may result in degradation of the sample.


Oven capable of maintaining a uniform temperature of 110 ± 5°C (230 ± 9°F).


Wetting Agent such as dishwashing detergent, that will promote separation of the fine materials.


Containers, Spoon/Mixing Utensils to agitate and wash the sample.


Step 1: Sampling

The test sample consist of the entire lot or representative sample of aggregate obtained according to AASHTO T 164 or AASHTO T 308 from which the binder material has been extracted.


Step 2:

Dry the test sample to constant mass at a temperature of 110 ± 5°C (230 ± 9°F). Determine the mass to the nearest 0.1g. If the sample consists of aggregate obtained from AASHTO T 164, add the mass of mineral matter contained in the extracted asphalt binder to the mass of the dry sample and record this value as the initial specimen mass. If the sample consists of aggregate obtained from AASHTO T 308, the initial mass recorded for this test shall agree with the mass of aggregate remaining after ignition (Mf from AASHTO T 308) within 0.1 percent, else, the results of this test should not be used for acceptance purposes.


Step 3:

The test sample is placed in a container and covered with water. A sufficient amount of wetting agent is added to ensure thorough separation of the material finer than the 75-μm (No. 200) sieve from the coarser particles. Add the wetting agent and agitate the contents of the container vigorously. Decant the wash water immediately over a nest of two sieves consisting of a 2.00-mm (No. 10) or 1.18-mm (No. 16) sieve superimposed on a 75-μm (No. 200) sieve. The operation of decanting the suspension (with 75 mic particles in suspension) over the sieve nest is continued until the wash water is clear.


Step 4:

All material (washed aggregate) retained on the nested sieves is returned to the container and dried to a constant mass. Determine its mass to the nearest 0.1 percent.


Step 5:

Sieve the aggregate over various sieve sizes as required by the specification covering the asphalt mixtures. Continue sieving for a sufficient period and in such manner that, after completion, not more than 0.5 percent by mass of the total sample passes any sieve during 60 s of continuous hand-sieving.



Calculations:

The mass of material passing each sieve, the mass retained on the next sieve, and the amount passing the 75-μm (No. 200) sieve are recorded. The sum of these masses must be within 0.2 percent of the mass after washing. The total passing the 75-μm (No. 200) sieve is obtained by adding the mass of dry material passing the 75-μm (No. 200) sieve by dry sieving to the mass removed by washing, and if applicable, the mass of mineral matter in the asphalt binder. Convert the masses of fractions retained on the various sieves and the total passing the 75-μm (No. 200) sieve to percentages by dividing each by the initial specimen mass.


Input - Project & Sample Details

Please enter the Project Details to appear on the generated pdf report.

Please enter the plot title to appear on the generated particle size distribution (PSD) plot.

Please enter the plot subtitle to appear on the PSD plot.

Please enter the Sample Details to appear on the generated pdf report.

Please enter the sample name to appear on the legend section of the PSD plot.

Please enter the specification name to for grading limits to appear on the legend section of the PSD plot.

Please enter brief remarks to appear on the generated pdf report.

Input: Materials Finer Than 75-μm (No. 200) Sieve by Washing

Please enter the total dried mass of the test portion before washing.


Sieve Analysis Calculations: Input Table

Sieve Size, mm Weight Retained
(g)
Cum Wt. Retained
(g)
Cum Wt. Passing
(g)
% Passing
% Passing
Upper Limits
% Passing
Lower Limits


PERCENT FINES

Mass of Test Portion/Sample before washing, g:

Mass of screened material remaining in the pan (and passing 75 micron sieve) after dry sieving, g:

Percent Fines:

PARTICLE SIZE GRADING - CHART



Website live for testing purposes. To advertise, please contact connect@transcalc.com .

CONTENT DISCLAIMER

The information and calculation tools provided on www.transcalc.com website (the "Service") is for general information purposes only. TransCalc assumes no responsibility for errors or omissions in the contents on the Service.In no event shall TransCalc be liable for any special, direct, indirect, consequential, or incidental damages or any damages whatsoever, whether in an action of contract, negligence or other arising out of or in connection with the use of the Service or the contents of the Service. TransCalc reserves the right to make additions, deletions, or modification to the contents on the Service at any time without prior notice.