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4 EVALUATION — Surface Defects <br /> SURFACE D �- ,� ."r.. ', ' a <br /> J �� 1 n <br /> e Slight raveling. <br /> _ <br /> _ • Small aggregate <br /> �'�- <br /> Raveling - � - ` � E. 3 <br /> - =1• particles have <br /> w <br /> Raveling is progressive loss of pavement _ T worn away <br /> . 1 • ,_- exposing tops <br /> material from the surface downward, <br /> ' 1 , <br /> of large <br /> caused by: stripping of the bituminous aggregate. <br /> re ate. <br /> film from the aggregate, asphalt hard- <br /> ening due to aging, poor compaction �.' I1,'�• � •� = ,,_ter'•� <br /> especially in cold weather construction, <br /> ?Ila 116 .4 <br /> or insufficient asphalt content. Slight to <br /> Moderate to <br /> moderate raveling has loss of fines. <br /> ° _ severe raveling. <br /> Severe ravelinghas loss of coarse <br /> �k. � Erosion further <br /> aggregate. Raveling in the wheelpaths i : " . exposes large <br /> can be accelerated by traffic. Protect - .• aggregate. <br /> 16 <br /> pavement surfaces from the environ- <br /> J. <br /> ment with a sealcoat or a thin overlay <br /> if additional strength is required. <br /> 4- <br /> Flushing '116 1% <br /> Flushing is excess asphalt on the <br /> surface caused by a poor initial asphalt - Severe raveling <br /> mix design or by paving or sealcoating and loss of <br /> over a flushed surface. Repair by blot- ' - surface <br /> material. <br /> ting with sand or by overlaying with - - _ <br /> properly designed asphalt mix. IT <br /> ,Polishing = <br /> r,. - <br /> Polishing is a smooth slippery surface . . '. •- • - <br /> caused by traffic wearing off sharp .. .• °°• <br /> edges of aggregates. Repair with . <br /> sealcoat or thin bituminous overlay ." ' <br /> using skid-resistant aggregate. IFS, - <br /> 161 <br /> .. - ��"';6"_ 1 16 '•'� '� �� - Polished,worn <br /> ,rYy1i �� � , � aggregate <br /> 7� - r � needs repair. <br /> Flushing. Dark _ <br /> _ Ii•' <br /> patches show = ­jr •W:r _. #®' -',_- <br /> where asphalt " <br /> - 4 - - M <br /> has worked <br /> to surface. - - <br /> Mir • -- . <br /> - r - Jr <br /> 7. . " 1 <br /> F. <br /> - do ■ <br /> .. <br /> Z <br /> IF 0—P <br /> It <br /> #,it <br /> 16 <br /> 17 <br /> �. T <br />