| Popis: |
THE CONSISTENCY OF SOIL CHANGES WITH REMOLDING. SOFTENING AND HARDENING ARE OBSERVED IN JAPAN IN ALLUVIAL AS WELL AS IN VOLCANIC ASH SOILS THAT HAVE MANY UNFAVORABLE PROPERTIES FOR ENGINEERING. MATERIALS TESTED WERE A VOLCANIC ASH SOIL 'KANTO LOAM,' KOJIMA CLAY, HACHIRO-GATA CLAY, AND ALLUVIAL MONTMORILLONITE CLAY IN PADDIES. ATTERBERG LIMIT TESTS WERE CARRIED OUT ACCORDING TO THE JAPANESE INDUSTRIAL STANDARD. RESULTS INDICATE (1) THE SEDIMENTATION VOLUME OF KANTO LOAM CLAY AND SODIUM MONTMORILLONITE SEEMS TO BE LARGER THAN THAT OF OTHER ALLUVIAL CLAYS, (2) RHEOMETER MEASUREMENTS SHOW THAT THE BINGHAM YIELD VALUE THETA DECREASES WITH REMOLDING, (3) THE MODULUS OF RIGIDITY G DECREASES WITH DECREASING PF VALUE, (4) THE PF VALUES AT HIGHER MOISTURE CONTENTS CHANGE ON REMOLDING, AND (5) THE RELATION BETWEEN STRESS AND TIME IS SHIFTED BY REMOLDING AS SHOWN IN A CURVE. |
