8. Low Temperature Test 



Place five SPD and five WPD samples, 10.2 ±0.51 by 15.2 ±0.51 centimeters, 



O O 



unaged, in a refrigerator at -17.8 ±2 Celsius (Q ±3 Fahrenheit) for 48 ±2 

 hours, then test each sample at the test temperature using ASTM Standard D 

 1682 Grab Test Method as described in 1. above. 



9. Acid Test 



Submerge five SPD and five WPD samples, 10.2 ±0.51 by 15.2 ±0.51 centi- 

 meters, unaged, in a 1-liter glass beaker filled to within 5.1 centimeters 

 (2 inches) of its top, with a solution of sufficient hydrochloric acid in 

 about a liter of distilled water to produce a pH of 2 ±0.1. Cover the 

 beaker with a watch glass and place in a constant temperature bath at 62.8 

 ±2 Celsius (145 ±5 Fahrenheit). Using a 0.635-centimeter glass tube 

 inserted into the spouted beaker to within 1.27 centimeters of the beaker 

 bottom, air is bubbled gently through the solution at the rate of one 

 bubble per second continuously for 14 days. The solution should be changed 

 every 24 hours, with the new warmed to 65.6 ±.5 Celsius (150 ±1 Fahrenheit) 

 before replacing the old solution. Test each sample then for tensile 

 strength and elongation using ASTM Standard D 1682 Grab Test Method as 

 described in 1. above. 



10. Alkali Test 



Submerge five SPD and five WPD samples, 10.2 ±0.51 by 15.2 ±0.51 

 centimeters, unaged, in a 1-liter glass beaker filled to within 5.1 centi- 

 meters of its top, with a solution of equal amounts of chemically pure 

 sodium hydroxide and potassium hydroxide dissolved in about a liter of 

 distilled water to obtain a pH of 13 ±0.1. Cover the beaker with a watch 

 glass and place in a constant temperature bath at 62.8 ±2 Celsius. Using 

 a 0.635-centimeter glass tube inserted into the spouted beaker to within 

 1.27 centimeters of the beaker bottom, air is bubbled gently through the 

 solution at the rate of one bubble per second continuously for 14 days. 

 The solution should be changed every 24 hours, with the new solution warmed 

 to 65.6 ±0.5 Celsius before replacing the old solution. Test each sample 

 then for tensile strength and elongation using ASTM Standard D 1682 Grab 

 Test Method as described in 1. above. 



11. JP-4 Fuel Test 



Submerge ten SPD and ten WPD samples, 10.2 ±0.51 by 15.2 ±0.51 centi- 

 meters, unaged, in JP-4 fuel at room temperature for 7 days. Test each 

 sample then for tensile strength using ASTM Standard D 1682 Grab Test 

 Method as described in 1. above. 



12. Determination of Equivalent Opening Size (E.Q.S.) 



a. Calhoun Method, 1972 . Based on the Calhoun (1972) method, five 

 unaged samples shall be tested. Obtain about 150 grams of each of the following 

 fractions of a sand composed of sound, rounded- to- subrounded particles: 



413 



