LIME FIXATION IN CLAYEY SOILS

摘要: PREVIOUS WORK IN STABILIZATION OF CLAYEY SOILS WITH LIME HAS SHOWN THAT SMALL AMOUNTS CONSIDERABLY IMPROVE WORKABILITY BUT CONTRIBUTE LITTLE TO STRENGTH, WHEREAS LARGER ALSO THE STRENGTH AND BEARING CAPACITIES THESE SOILS. THIS SUGGESTS POSSIBILITY ADDED SOIL MUST FIRST SATISFY AN AFFINITY FOR LIME, REFERRED AS FIXATION. SOME ADDITION FLYASH CAUSED EVEN MORE SIGNIFICANT GAIN STRENGTH. RESEARCH DESCRIBED PAPER WAS UNDERTAKEN DETERMINE WHETHER FIXATION DOES OCCUR, IF SO, MECHANISMS INVOLVED AMOUNT UTILIZED. SAMPLES SIX NATURAL WERE MIXED VARYING (0 12 PERCENT), CURED TWO DAYS AT 100 PERCENT HUMIDITY 70 F TEMPERATURE, SUBJECTED ATTERBERG LIMITS TESTS. SIMILAR MIXES COMPACTED OPTIMUM MOISTURE CONTENT STANDARD PROCTOR DENSITY TESTED UNCONFINED COMPRESSION AFTER 7 28 MOIST CURING. CURVES VS. COMPRESSIVE INDICATE WHEN PLASTIC LIMIT INCREASES, REMAINS RELATIVELY CONSTANT, CONSTANT INCREASES. THUS, IS INDICATIVE FURTHER CORRELATIONS SHOW PROPORTIONAL TYPE 2-MICRON CLAY PRESENT INDEPENDENT ADSORBED CATION PRESENT. A RESULT STRENGTHS, KAOLINITIC MONTMORILLONITIC FOUND BE WELL STABILIZED ALONE, ILLITIC- CHLORITIC REQUIRE ADDITIONS OBTAIN GAINS /AUTHOR/