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Low class bituminous treatments in tropics

Low class bituminous treatments in tropics

Low class bituminous treatments in tropics

I am attempting to improve the buildable specifications for low class bituminous treatments in particular the islands of the Bahamas.  Generally a double surface treatment over sub-base/basecourse of crushed limestone is used.  RC250 cut back asphalt is used in the Bahamas.  I understand that RC250 is to be phased out for safety reasons - workers suffering burns.  What alternatives are there?  Any advice is greatly appreciated.

RE: Low class bituminous treatments in tropics

Emulsions can be used, but require longer cure times.

Consider using a mixed-in-place material using emulsified asphalt and the indigenous limerock in the Bahamas.  Only a light chip seal would be necessary to protect it and it would have more water resistance than the limerock base alone.

Other than that, you might consider a lower quality hot mix.

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