TRIAXIAL CLASSIFICATION OF THE SURFACE SOILS OF TEXAS AS GROUPED BY SOIL CONSERVATION SERVICE SERIES

LABORATORY AND FIELD STUDIES ON 710 SOIL SERIES HAVE BEEN CONDUCTED IN ORDER TO SECURE TRIAXIAL CLASSIFICATIONS FOR AS MANY AS POSSIBLE. OF THESE 710 SOILS, 46 PERCENT WERE CLASSIFIED AS A RESULT OF THE SURVEY OF ESTIMATES AND TESTS CONTAINED IN THE FILES OF THE MATERIALS AND TESTS DIVISION. TABULATION OF ADDITIONAL INFORMATION INCREASED THE CLASSIFICATIONS TO OVER 70 PERCENT. TRIAXIAL CLASSIFICATIONS ALSO INCREASED FROM 303 TO 498 AS A RESULT OF THE ADDITIONAL INFORMATION. THE STUDY REVEALED THAT CLAY SUBGRADES, WITH HIGH P.I. AND RESULTANT SWELLING, PRESENTED THE MOST SERIOUS PROBLEMS TO HIGHWAY CONSTRUCTION. HOUSTON BLACK - HOUSTON CLAY WHICH IS A PRIME EXAMPLE OF THIS TYPE OF MATERIAL, HAS A TRIAXIAL CLASSIFICATION OF 5.4 BASED ON A TOTAL OF 247 TESTS. TRIAXIAL CLASSIFICATION'S FOR SUBGRADE SOILS ARE OBTAINED BY A COMBINATION OF TESTS PUBLISHED IN THE MANUAL OF TESTING PROCEDURES OF THE MATERIALS AND TEST DIVISION. LOCATION OF SOIL MATERIALS ARE MADE BY STATION NUMBERS ON LARGE-SCALE MAPS USED BY THE PROJECT ENGINEER DURING CONSTRUCTION OF THE ROADWAY. THE MAPPING AND CLASSIFICATION OF SOILS IS REVIEWED AS IS ALSO THE USE OF INFORMATION IN LOAD ZONING. RESULTS OF THE STUDY ARE TABULATED AND DISCUSSED. CONTROL OF MOISTURE CONTENT BOTH BEFORE AND AFTER COMPACTION OF THE SUBGRADE SOILS, TOGETHER WITH PROPER COMPACTION IS THE MOST ECONOMICAL METHOD OF STABILIZATION. THE SECOND BEST METHOD IS TO STABILIZE THESE MATERIALS WITH LIME, CEMENT OR ASPHALT. SUGGESTED USAGE OF THE STUDY DATA IS OUTLINED.

• Supplemental Notes:
  • Rept No 3-05-71-035 APPS
• Corporate Authors:

  Texas State Department of Highways & Public Transp

  11th and Brazos Streets
  Austin, TX  United States  78701
• Authors:
  • SMITH, A W
  • Dyer, K A
• Publication Date: 1973-1

Media Info

• Pagination: 10 p.

Subject/Index Terms

• TRT Terms: Asphalt; Calcium oxide; Cement; Classification; Clay; Compaction; Field tests; Laboratories; Laboratory studies; Soil conservation; Soil mapping; Soil stabilization; Soil types; Subgrade (Pavements); Swelling soils; Triaxial shear tests; Waterproofing
• Uncontrolled Terms: Soil classification; Stabilization
• Old TRIS Terms: Soil maps
• Subject Areas: Environment; Geotechnology; Highways;

Filing Info

• Accession Number: 00230238
• Record Type: Publication
• Files: TRIS, STATEDOT
• Created Date: Apr 20 1974 12:00AM