Advantages and disadvantages using cutback bitumen?

Answer 1

Cut-back Bitumen

Cutbacks have several advantages

· They are fluid at lower application temperatures (50° to 250°F).

· They remain f uid for a longer period after they have been applied to the road, which permits some latitude between their distribution and the application of rock.

· Some of the cutter remains in the cutback seal to remain flexible to conform to some movement in the underlying pavement and base. A cutback can have self-healing characteristics with minimal cracking.

· The cutback can tolerate some fines in the cover aggregate. The kerosene cutter is more tolerant than the naphtha to these fines.

· Mixes can be made with unheated aggregates and some cutbacks.

The disadvantages of cutbacks are as follows:

· The cutbacks do not obtain their ultimate strength until a good part of the solvent has escaped (evaporated). During the "curing period," the rock can be displaced under heavier traffic, particularly in warm weather. During this same period, early rain can float the cutback to the top of the rock and can be tracked away under traffic. The type of cutter solvent affects the "curing period."

· There is a potential fire hazard using cutbacks that contain petroleum solvents.

· In certain areas, air pollution is a concern as the solvent evaporates into the atmosphere.

· Excessive moisture on either the pavement to be sealed or the cover rock can hinder good adhesion with a cutback.

Answer 2

the pros and cons of bitumen are simply poop. every one knows that is true and if you dont then you are a stupid nut head!