Schonack - Understanding Crack Sealing Materials

I. History of Materials for Sealing Cracks in A.C. Pavements From the beginning through 1970 +/- Minimal if any crack sealing Virtually placing anything and/or everything in cracks to fill the void, ie straight asphalt, cutbacks, emulsions, etc. 1975 through today Development of a modified asphalt and crumb rubber 1980 through today Superior performing sealants developed with asphalt, ................
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