METHODS OF SAMPLING AND TESTING HIGHWAY MATERIALS 131 
Sampling, method of— Continued. Page 
Portland cement 3 
Premoulded joint filler 61 
Stone, slag, sand 13 
Woe . 98 
ggregate. 
: in aggregate 20 
• Mechanical ana: 
Silt and clay in fine aggregate 
: clay in gravel 
Abrasion test 16 
:>ling 13 
Sodium sulphate soundr ss 1 2 
Softening point of bituminous material 
Soft particles in gravel: 
lm] _. 19 
tie load test 
v in carbon disulphide, bituminous 
material 64 
v in carbon tetrachloride, bitumi- 
nous material 
Solubility in paraffin naphtha, bituminous 
material 66 
Soundness test for coarse 20 
Specific gravity of sand, stone, slag, etc 22-24 
Specific viscosity, bituminous materia- 
coating. See Gal van; Page 
Stone block, method of sampling 13 
Stone: 
Abrasion test 16 
Method of sampling 13 
Sou: 
Toughness test 18 
Tar. See Bituminous materials. 
Tension test for fine aggregate 55 
Tension test for metallic materials ill 
g metallic materials, methods ill 
I machines, verification of 105 
Tile, drain, tests 50 
Toughness test of rock 18 
Tough: 19 
Vitrified clay culvert pipe, tests 46 
Voids, percentage of in fine aggregate 
Volatilization test for bituminous materials.. ' 66 
Water in bituminous materials 85 
Water in emulsions, test 
Water for concrete 35 
Weight of concrete aggregates, test for 27 
TS ire rope, tests for 
Wood block, sampling and tests 98 
Zinc chloride test for shale 20 
Zinc coating, weight of-. 100 
