812MASONRY STONE

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811.03SBR Latex for Asphalt Surface Treatments

The SBR latex to be used shall be an unvulcanized styrene butadiene rubber in liquid latex form. The manufacturer of the SBR latex shall provide a written certification showing test results for total rubber solids, percent styrene and butadiene monomer, ash content, and viscosity. The test results shall comply with the following minimum requirements: Cationic CRS-2 Compatible Total Solids, % by weight {mass} (min.) 60 Monomer Ratio Butadiene/Styrene, % 75/25 ± 3 Brookfield, Viscosity, RVT #3 Spindle, 20 rpm 500-3000 Total Ash (max.), % of Total Rubber Solids, ASTM D 297 3.5 Before beginning the SBR latex rubber surface treatment operation, and as often thereafter as deemed necessary, the Department will check the compatibility of the SBR latexand the asphalt emulsion by using the following procedure:

coagulum.

If the SBR latex-asphalt emulsion is in a smooth liquid state, the materials show compatibility. If the materials coagulate, the Contractor will be required to make any changes necessary, such as lowering the pH of the asphalt emulsion or slightly increasing the surfactant in the asphalt emulsion, to create compatibility of the materials. The SBR latex-asphalt emulsion shall be used within 24 hours after combining the materials unless special authorization of the Engineer allows otherwise.

811.04Styrene Butadiene (SB) or Styrene Butadiene Styrene (SBS) for Hot Mix Asphalt

A sample of the asphalt binder at the appropriate polymer loading, along with an infrared trace using ALDOT 408 showing the styrene and butadiene peaks, along with the percent polymer added shall be submitted to the Department for laboratory evaluation. MASONRY STONE

812.01Masonry 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 thickness 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.

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 depth. All stones shall be inspected before and after laying and all rejected material shall be removed immediately from the work.

Stone for rustic masonry shall be rough quarried or field stone of varying sizes and shapes, suitable for the purpose intended and with no attempt made toward squaring or dressing. RIPRAP MATERIALS 685

RIPRAP MATERIALS

814.01Stone

All stone for riprap shall consist of field stone or rough unhewn quarry stone as nearly rectangular 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 shall 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. Control 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 truck 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.

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 pounds {5 kg}.

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}.

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}.

Stone for this class riprap shall consist of reasonably well graded stones ranging from 50 to 1000 pounds {25 kg to 450 kg} with not over 25% having a weight {mass} over 1000 pounds {450 kg}, at least 50% having a weight {mass} over 500 pounds {250 kg} and not more than 25% having a weight {mass} under 50 pounds {25 kg}.

Stone for this class riprap shall consist of reasonably well graded stones ranging from 2000 pounds {900 kg} and down with not over 10% having a weight {mass} over 2000 pounds {900 kg}, at least 50% having a weight {mass} over 1000 pounds {450 kg} and not more than 25% having a weight {mass} under 200 pounds {100 kg}.

814.02Concrete Sacked Riprap

Sacks shall be new, unused, manufactured from jute, cotton, burlap, reinforced paper, or other approved materials capable of holding the cement mixture without significant leakage when handled. The sacks shall be of uniform size and dimension with a capacity of approximately 0.75 cubic feet {0.025m3}.

Local sand, gravel, or other designated aggregates shall be from sources approved by the Engineer suitable for the purpose intended.

Cement shall meet the requirements of Section 815.

Water shall meet the requirements of Section 807.