814.01 Stone.
MASONRY STONE
812.01 Masonry Stone.
a.Type I Masonry Stone . Stone for coursed and uncoursed rubble masonry shall be of approved quality, sound, durable, and free from segregations, seams, cracks, and other structural defects or imperfections tending to destroy its resistance to stresses and the weather. It shall be free from rounded, worn, or weathered surfaces. All weathered stone shall be rejected. It shall be kept free from dirt, oil, or any other injurious material which may prevent the proper adhesion of the mortar. Unless otherwise provided or shown on the plans, individual stones shall have a thic kness of not less than 6 inches {150 mm}. No stone having a horizontal dimension less than 12 inches {300 mm} or less than its thickness shall be used except for filling the interior of the wall.
b.Type II Masonry Stone . This stone shall meet the requirements of Type I Masonry Stone above, except that the dimensions of the individual stones shall be 4 to 6 inches {100 to 150 mm} in depth and shall have a reasonably flat top surface of a width not less than 2 inches {50 mm} and length not less than the dep th. All stones shall be inspected before and after laying and all rejected material shall be removed immediately from the work.
c.Type III Masonry Stone . Stone for rustic masonry shall be rough quarried or field stone of varying sizes and shapes, suitabl e for the purpose intended and with no attempt made toward squaring or dressing. SECTION 814 RIPRAP MATERIALS
814.01 Stone.
a.General . All stone for riprap shall consist of field stone or rough unhewn quarry stone as nearly r ectangular in section as is practicable. When tested as specified in AASHTO T 104, the stone shall show a soundness of not less than 85 percent for 5 cycles, using sodium sulphate, and shall be suitable in all other respects for the purpose intended. It sh all have a percentage wear not over 60 percent by the Los Angeles Test, AASHTO T 96, and shall meet the requirements of Article 801.02 for deleterious substances; however, the requirements for deleterious substances may be modified by the Engineer. Contro l of the gradation of the various classes of riprap will be by visual inspection either at the source or the project site at the Engineer's option. Any difference of opinion between the Engineer and the Contractor shall be resolved by checking two random t ruck loads (or equivalent size sample) in accordance with the method provided in ALDOT -239 with all the equipment, labor, and sorting site for this check being provided by the Contractor at his expense.
b.Class 1 Riprap . Stone for this class riprap shall consist of graded stones ranging from 10 to 100 pounds {5 to 50 kg} with not more than 10% having a weight {mass} over 100 pounds {50 kg} and at least 50% having a weight {mass} over 50 pounds {25 kg} and not over 10% having a weight {mass} under 10 pound s {5 kg}.
c.Class 2 Riprap . Stone for this class riprap shall consist of graded stones ranging from 10 to 200 pounds {5 kg to 100 kg} with not over 10% having a weight {mass} over 200 pounds {100 kg} and at least 50% having a weight {mass} over 80 pounds {40 kg} and not over 10% having a weight {mass} under 10 pounds {5 kg}.
d.Class 3 Riprap . Stone for this class riprap shall consist of reasonably well graded stones ranging from 25 pounds to 500 pounds {10 kg to 250 kg} with not over 10% having a weight {mass} over 500 pounds {250 kg}, at least 50% having a weight {mass} over 200 pounds {100 kg} and not more than 15% having a weight {mass} under 25 pounds {10 kg}.
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 728–727 of 934.