(A) Whenever sawed joints are to be provided they are to be sawed with a machine made especially designed for sawing concrete. The saw cuts are to have a depth of one-fourths of the thickness of the paving slab and a minimum width of one-eighths inch. Such sawing shall be done as soon as possible but under no circumstances shall the time of such sawing exceed 24 hours after the placing of the concrete.
(B) Just prior to filling the sawed joints in hardened concrete, each joint shall be thoroughly cleaned of all foreign material to its full depth by means of compressed air at sufficient pressure to accomplish the result satisfactory to the engineer.
(C) Joints shall be filled in such a manner that the filler not be spilled on the surface of the concrete. Sufficient filler shall be inserted into the joints so that the filler is flush with the surface of the pavement when the work is completed. When filling joints on slopes and intersections, the work shall start at the lowest point and progress toward the highest point.