. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 36 Clay Fabric and Geotechnical Properties of Sediment Cores. Figure 49.—Clay fabric—depicted at high magnification—showing 'swirl' pattern and local area of highly oriented particles, core B-2 ( m) remolded sample. tions (fig. 49EM). The overall remolded fabric is charac- terized by large areas of highly oriented particles (domains) forming the "swirl" pattern over extensive areas. The gen- eral high void ratio is maintained by remoldi
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 36 Clay Fabric and Geotechnical Properties of Sediment Cores. Figure 49.—Clay fabric—depicted at high magnification—showing 'swirl' pattern and local area of highly oriented particles, core B-2 ( m) remolded sample. tions (fig. 49EM). The overall remolded fabric is charac- terized by large areas of highly oriented particles (domains) forming the "swirl" pattern over extensive areas. The gen- eral high void ratio is maintained by remolding at the original water content. Although some small areas show randomly oriented clay particles or domains, the common features of the remolded fabric are the highly oriented clay particles as observed in the photomicrographs of figure 50EM. Lambe (1953) proposed that remolded clay was characterized by a high degree of parallelism between ad- jacent particles (fig. 4), and Mitchell (1956) claimed that remolding tended to homogenize the sediment sample render- ing the clay less variable. Lambe and Whitman (1969) claim that physically working or remolding of an element of soil until it becomes homogeneous tends to align adja- cent particles and thus destroys the bonds between particles. Pusch (1970) also reported that remolding causes succes- sive breakdown of aggregates and a decrease in shear strength. The electron photomicrographs of both 163A and B—2 samples contrasting the undisturbed and re- molded sediments reveal the characteristic features of the clay fabric described by the above researchers. In addition, these comparisons of undisturbed versus remolded fabrics give strong evidence that the samples have not been severely disturbed, and the fabric of the undisturbed samples have maintained a high degree of structural integrity. Image Enhancement Techniques Clay fabric particle-to-particle integrity and sample quality as influenced by sample preparation
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