SAMPLING AND TESTING HIGHWAY MATERIALS. 
Table I. — A. S. T. M. standard sieves. 
13 
Mesh designation. 
Unit of measure. 
Actual 
mesh. 
Opening. 
Wire 
diameter. 
Permissible varia- 
tions. 
Mesh. Diameter. 
1 
10 1 
/Centimeter 
\Inches 
3.9 
9.9 
8 
20.3 
12.0 
30.5 
16 
40.6 
20 
50.8 
31 
78.7 
39 
99.1 
79 
200.7 
0.2O0 
.079 
.085 
.0335 
.050 
.0197 
.036 
.0142 
.029 
.0114 
.017 
.0067 
.014 
.0055 
.0074 
.0029 
0.056 
.022 
.040 
.0157 
.033 
.0130 
.026 
.0102 
.021 
.0083 
.015 
.0059 
.0116 
.0046 
.0053 
.0021 
0.04 0.005 
20 
/Centimeter 
\Inches 
. 2 . 0015 
30 
f Centimeter 
\Inches 
.4 .0012 
1. . 0005 
40 i 
(Centimeter 
\Inches 
. 6 . 0010 
1.5 .0004 
50 
/Centimeter 
\Inches 
.8 ; .0010 
2 .0004 
80i 
(Centimeter 
(Inches 
1 .0008 
3 .0003 
100 i 
/Centimeter 
\Inches 
1 .0008 
3 . 0003 
200i 
/Centimeter 
\Inches 
3 • . 0005 
8 .0002 
i The J-inch circular opening screen and these sieves are recommended for the sieve analysis except for 
fine aggregate used in bituminous surfaces. 
11. SIEVE ANALYSIS OF MIXTURES OF FINE AND COARSE AGGREGATES. 
(A. S. T. M. Standard Method, Serial Designation: D 19-16, slightly modified.) 
The method shall consist of (1) drying at not over 110°C. (230° F.) to a constant 
weight a sample weighing in pounas six times the diameter in inches of the largest 
holes required; (2) separating the sample by the use of a screen having circular open- 
ings 0.64 cm. (I inch) in diameter; (3) examining the portion retained on the screen 
in accordance with the standard method for making a sieve analysis of broken stone, 
gravel, pebbles, or broken slag (test No. 9), examining the portion passing this screen 
in accordance with the standard method for making a mechanical analysis of sand 
or other fine aggregate (test No 10); (4) and recording the mechanical analysis in 
the following manner: 
Per cent. 
Passing 200- mesh sieve 
Passing 100- mesh sieve and retained on a 200- mesh sieve. 
Passing 80- mesh sieve and retained on a 100- mesh sieve 
Passing 10- mesh sieve and retained on a 20- mesh sieve 
Passing 0.64-cm. (^-inch) screen and retained on a 10- mesh sieve 
Passing 1.27-cm. (^-inch) screen and retained on a 0.64-cm. (flinch) screen 
Passing 1.90-cm. (f-inch) screen and retained on a 1.27-cm. (^inch) screen 
100 
In the sieve analysis of the sand fraction, the following sizes of sieves shall be 
used except for fine aggregate used for bituminous surfaces: ^-inch circular opening, 
10-mesh, 40-mesh, 80-mesh, 100-mesh, and 200-mesh. 
