|
| Title |
DISCUSSION OF PROGRESS REPORT OF INVESTIGATION ON DEVELOPMENT OF EARTH ROADS
|
| Accession No |
00232865 |
| Authors |
Catchings, W B |
| Journal Title |
Highway Research Board Proceedings
|
Corp. Authors
/ Publisher |
Highway Research Board
|
| Publication Date |
19260000 |
| Abstract |
THE METHODS OF TREATING SOIL ROADS IN NORTH CAROLINA ARE DESCRIBED. THE METHODS INCLUDE SAND CLAY, TOP SOIL, SHALE, CHERT, MARL, SPAR, ETC. RESULTS IN APPEARANCE CLOSELY RESEMBLE SHEET OR SAND ASPHALT USING THESE MATERIALS. IT IS EMPHASIZED THAT THE FINISHED SURFACE WILL RIDE NO SMOOTHER NOR WILL IT CARRY ANY HEAVIER VEHICLES THAN THE BASE PROVIDES. SO EVERY PRECAUTION MUST BE TAKEN IN STRENGTHENING THE BASE AND PUTTING THE SURFACE IN AS SMOOTH A CONDITION AS POSSIBLE. THE SAND IS STOCKPILED IN PILES ONE-HALF TO ONE MILE APART DURING THE WINTER. PRIOR TO APPLYING THE PRIME COAT, ALL LOOSE MATERIAL IS REMOVED FROM THE ROAD SURFACE, FIRST BY ROAD MACHINING AND THEN BY BROOMING WITH A ROTARY STREET SWEEPER. A SPECIALLY PREPARED TAR IS THEN APPLIED AT THE RATE OF 3 OR 4 TENTHS OF A GALLON PER SQUARE YARD AND COVERED WITH SAND AT THE RATE OF 12 TO 15 POUNDS PER SQUARE YARD. AFTER ABOUT SIX HOURS THIS SURFACE IS DRAGGED WITH A SECTIONAL BROOM DRAG MADE OF STEEL BRISTLE PUSH BROOMS. THIS DISTRIBUTES THE SAND UNIFORMLY. THE PRIME OR FIRST COAT IS ALLOWED TO SET UP UNDER TRAFFIC FROM 5 TO 10 DAYS TO PERMIT THE VOLATILE OILS TO EVAPORATE AND TO OBTAIN THE FULL COLLOIDAL EFFECT OF THE TAR. LOOSE SAND IS SWEPT ASIDE AND 4 TO 5 TENTHS OF A GALLON OF SPECIALLY PREPARED ASPHALT IS APPLIED AND COVERED WITH 30 TO 35 POUNDS OF SAND PER SQUARE YARD AND BROOM DRAGGED AFTER 4 OR 5 HOURS. BROOM DRAGGING AND TOUCHING UP WITH SAND IS CARRIED ON UNTIL THE ASPHALT IS SET UP AND WILL TAKE NO MORE SAND. |
Supplemental
Information |
Vol 5, Pt 1, PP 268-270 |
| TRT Terms |
Base course (Pavements) ; Bituminous materials ; Cherts ; Earth roads ; Marl ; Road construction ; Sandy clays ; Shale ; Surface treating ; Topsoil |
| Other Terms |
Base courses; Bituminous surface treatments; Low cost road construction |
| Subject Areas |
H62 FOUNDATIONS (SOILS) |
| Availability |
Transportation Research Board Business Office |
| TRIS Files |
HRIS |
| Database |
TRIS Online |
|
TRT
