MORAINIC SOIL DEPOSITS AND THEIR USE IN LOWER COST ROADS
THE TYPE OF CONSTRUCTION NORMALLY ADOPTED IN FOREST ROADS CONSISTS OF A MECHANICALLY STABLE BASE, AS THE RUNNING SURFACE, OVER THE SUBGRADE MATERIALS. WHEN SOILS FROM MORAINE MOUNDS ARE TO BE USED. THEIR GEOLOGICAL NATURE SHOULD BE DETERMINED, AND THEIR ENGINEERING BEHAVIOR CHARACTERIZED. THEY APPEAR TO FALL SHORT OF THE IDEAL ROAD CONSTRUCTION MATERIAL ON THREE MAIN POINTS: LACK OF BINDER, THE NEED OF HIGH COMPACTIVE EFFORT TO OBTAIN ACCEPTABLE C. B. R. VALUES, AND THEIR SUSCEPTIBILITY TO FROST HEAVE. THESE MAY BE CORRECTED BY THE ADDITION OF CEMENT OR BITUMINOUS EMULSION BUT THE COST OF SUCH MEASURES IS PERHAPS BEYOND WHAT IS ECONOMICALLY VIABLE FOR THE CONSTRUCTION OF THE ROAD. MECHANICAL STABILIZATION BY CRUDELY MIXING IN COARSE AGGREGATE MAY, HOWEVER, BE FEASIBLE ALTHOUGH LESS EFFECTIVE. LABORATORY INVESTIGATIONS HAVE INDICATED THAT THE OPTIMUM COMBINATION OF THE COARSE AND FINE FRACTIONS OF THESE SOILS LIES BETWEEN 45 TO 25 PER CENT FINES FOR THE MATERIAL LESS THAN 3/4 IN. SIEVE SIZE. /AUTHOR/
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Supplemental Notes:
- Vol 498 No 587, PP 388-396
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Authors:
- MCGOWN, A
- Mcarthur, A A
- Publication Date: 1971-11
Media Info
Subject/Index Terms
- TRT Terms: Building materials; Construction; Costs; Moraines; Paving; Soil deposits; Soils
- Uncontrolled Terms: Construction costs
- Subject Areas: Construction; Finance; Geotechnology; Highways;
Filing Info
- Accession Number: 00215480
- Record Type: Publication
- Files: TRIS
- Created Date: Mar 7 1972 12:00AM