TECHNIQUES OF ENGINEERING GEOLOGY IN EVALUATION OF ROCK CORES FOR CONSTRUCTION MATERIALS SOURCES

ONE OF THE PRIMARY AIMS OF THE ENGINEERING GEOLOGISTS IS IDENTIFY AND EVALUATE THE VARIOUS ROCK BEDS EXPOSED ON OR NEAR THE SURFACE IN A GIVEN AREA. CORES DRILLED BY COMMERCIAL MATERIALS PRODUCERS IN THEIR EXPLORATORY PROGRAMS MAY BE SUBMITTED TO THE IOWA STATE HIGHWAY COMMISSION FOR EVALUATION. MOST OF THESE SEDIMENTARY ROCK CORES ARE LOGGED BY SUITES USING AN AREA GENERALIZED GEOLOGIC COLUMN. BEDS ARE SEPARATED INTO WORKABLE 'LEDGES' AND SAMPLES FOR PHYSICAL AND CHEMICAL TESTS ARE TAKEN ACCORDINGLY. CROSS SECTIONS ARE DRAWN USING CORE LOCATIONS, RELATIVE ELEVATIONS, AND OVERBURDEN THICKNESSES. TEST DATA ARE SUPERIMPOSED ON THE CROSS SECTIONS TO GIVE AN OVERALL PICTURE OF THE FORMATION'S POTENTIAL IN REGARD TO CONSTRUCTION MATERIALS. AFTER PROSPECTS ARE OPENED INTO QUARRIES, FOLLOW-UP CORRELATIONS ARE MADE BETWEEN CORE EVALUATIONS AND ACTUAL LEDGE CONDITIONS AND PRODUCTION DATA. THESE METHODS ENABLE THE IDENTIFICATION OF MATERIALS FOR HIGHWAY CONSTRUCTION, LOWER CONSTRUCTION COSTS, AND CONTINUANCE OF A HIGH QUALITY OF PRODUCT.

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    • Issue Number: 0

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Filing Info

  • Accession Number: 00229632
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 15 2004 2:39AM