PROOF-ROLLING OF SUBGRADES
Willard J. Turnbull, Charles R. Foster · Highway Research Record · 1960
PROOF-ROLLING OF SUBGRADES IS BEING USED BY STATE HIGHWAY DEPARTMENTS TO CHECK THE ADEQUACY OF NORMAL COMPACTION AND TO CORRECT ANY DEFICIENCIES THAT MAY EXIST. PROOF-ROLLING IS AN EXCELLENT TOOL, BUT THERE IS A GROWING TENDENCY TO LOOK ON PROOF-ROLLING AS A PANACEA THAT WILL END ALL COMPACTION PROBLEMS. THIS IS A FALSE APPROACH, AS PROOF-ROLLING WILL FIND AND CORRECT DEFICIENCIES ONLY UNDER CERTAIN CONDITIONS OF MOISTURE. THIS PAPER SHOWS THE CASES WHERE PROOF-ROLLING WILL BE EFFECTIVE AND THOSE CASES WHERE IT WILL NOT. THE PAPER ALSO CONTAINS INFORMATION THAT CAN BE USED TO ESTABLISH DESIRABLE ROLLER CHARACTERISTICS AND THE AMOUNT OF ROLLING THAT SHOULD BE USED FOR VARIOUS CONDITIONS. /AUTHOR/