Geotechnical and Materials Engineering Standards for Bridge ...

crystalline and non-crystalline parts. The fabric of sedimentary
rocks 1s often related to the mode of deposition and hence bedding.
Bedding fs usually considered as a stmcture and should ba described
in tha structural log, although a general statement about the layer
thickness is appropriate in the rock mass description. Typical
textural terms include porphyritic, crystalline, granular, amorphous
and glassy. The principal rock name should ba in capital letters
e.g. calcareous SANDSTONE. This colrcmn can also be used for
additional structural dcscriptlon or to ra -emphas iza the degree of
weathering.
TESTS - Results af either fnsim or laboratory testa can be
recorded in this column.
OTHFX INF'ORHATION - Jn addition to the log itself, it is preferable to
&e photographs of the core. Two or three
photographs (1000 x 1500 mm) along the core box
joined together 5n a strip produces a suitable
size picture.
British Standards Institution, Code of Practice for Site
Investigations BS 5930:1981.
Brown, E. T. Rock Characterization, Testing and knitaring ,
International Society for Rock Mechanics, 1981.
3 Canadian Geotechnical Socicrty . Canadf gn Foundation Engineering
Manual, 2nd Edit ion, 1985.
Gcolagieal Society Engineering Group Warkin6 Parv. The bgging of
Rock Cores for Engineering Arrposes. Quarterly Journal of
Engineering Geology, Vo1.3 No 1, 1970.