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Shrinkage is the cause of most cracks in asphalt pavements. Standard
asphalt, approximately 94 percent sand and rock and 6 percent asphalt
oil, takes a beating from the elements. Sun, wind, rain, and heat
oxidize asphalt, causing hardening and shrinkage. The pavement then
breaks at the weakest points, usually the joints along the curb
lines and cold paving joints. Block cracking at regular intervals,
usually transversely every 30 to 90 feet is also common.
Will crack sealing save your pavement?
Cracks cause potholes and other pavement deterioration by allowing
moisture into the sub-base. Sealing asphalt cracks and concrete
joints will stop the deterioration and is a means of saving money.
Crack sealing repairs a sound pavement that has started to crack
and delays expensive resurfacing. Crack sealing also prepares the
pavement for additional work such as overlay, chip seal or seal
coating.
What are hot-pour sealants?
The most advanced blend of asphalt cements, extender oils, rubbers,
antioxidants and fillers are used in our hot-pour sealants. These
products are a major advance from the old, unsuccessful hot-AC-oil
and sand method used for years to fill cracks. Bergman's sealants
include additives such as rubber and carbon black, giving them the
ability to withstand the conditions that cause pavements to cracking.
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