A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Subgrade Moisture Variations. Interim Report Viii: Evaluation of Collected Data 1966-1969
The report presents an evaluation of moisture and temperature measurements taken within expansive clay subgrade soils under typical Oklahoma highway pavements. The researchers drew several conclusions: Except during droughts, subgrade moisture content varies seasonally, and gradually increases to an 'equilibrium' value--near a moisture content/plastic limit ratio of 1.1 to 1.3. During droughts the soil may dry to a depth of 10 feet. Impervious pavements with wide shoulders, with impervious and flexible base courses, and built on grade or in cut sections performed best. Wide shoulders reduced moisture variations beneath the pavements although moisture content varied significantly under the shoulders. Lateral and vertical swelling of expansive Oklahoma subgrades caused significant damage to soil-cement base material and to pavements without base material. Flexible, impervious base materials, such as stabilized aggregate base courses or sand-asphalt base courses, reduced infiltration and resisted cracking better than sand cushion or soil-cement base materials. (BPR abstract)
Subgrade Moisture Variations. Interim Report Viii: Evaluation of Collected Data 1966-1969
The report presents an evaluation of moisture and temperature measurements taken within expansive clay subgrade soils under typical Oklahoma highway pavements. The researchers drew several conclusions: Except during droughts, subgrade moisture content varies seasonally, and gradually increases to an 'equilibrium' value--near a moisture content/plastic limit ratio of 1.1 to 1.3. During droughts the soil may dry to a depth of 10 feet. Impervious pavements with wide shoulders, with impervious and flexible base courses, and built on grade or in cut sections performed best. Wide shoulders reduced moisture variations beneath the pavements although moisture content varied significantly under the shoulders. Lateral and vertical swelling of expansive Oklahoma subgrades caused significant damage to soil-cement base material and to pavements without base material. Flexible, impervious base materials, such as stabilized aggregate base courses or sand-asphalt base courses, reduced infiltration and resisted cracking better than sand cushion or soil-cement base materials. (BPR abstract)
Subgrade Moisture Variations. Interim Report Viii: Evaluation of Collected Data 1966-1969
L. K. Shaw (author) / T. A. Haliburton (author)
1970
109 pages
Report
No indication
English
Civil Engineering , Soil & Rock Mechanics , Pavements , Clay , Foundations(Structures) , Moisture , Temperature , Shear stresses , Plasticity , Compressive properties , Drying , Flexible structures , Stabilization , Gravel , Sand , Asphalt , Construction materials , Roads , Oklahoma , Statistical data , Highways , Subgrades , Soil stabilization , Aggregates
Subgrade Moisture Variations. Summary of Collected Data
| NTIS | 1970