- Email: [email protected]
Electrical properties of granite with implications for the lower crust
6A
821041 RE-EXAMINATION OF ONE-POINT MEI~ODS OF LIQUID LIMIT D,.'z'a~IMI NATION NagaraJ, T S; Jayadeva, M S Geotechnlque, V31, N3, Sept 1981, I~13-425 One-point methods of liquid limit determination have a stromg scientific base derived from the uniqueness of flow lines that can be obtained on the basis of physico-chemical considerations~ Previous methods were formulated by a statistical analysis of data. A simple one-polnt cone penetrometer method is suggested t~pon critical exsmination of previous experimental data, amd compared with earlier methods. C ~ u t e d values from this method agree well with experiment.
8210~2 P R E S S U ~
TESTS AT VERY SHALKEW DEPTH Briaud, J L; ~ields, D H J Geotech E~gmg Div ASCE, V107, NC/~8, Aug 1981, P1023-1040
In pressuremeter tests there is a critical depth below which ~ o u m d surface deformation, due to expansion of the probe, is almost n o ~ i s t e n t . Prcximity of the ground surface therefure affects pressuremeter test results ard this is investigated especially in relation to a pressuremeter used in pavement design. Tests were carried out on sand at varying depth and density, and on a natural clsy deposit at depths UP to 3ft, using a standard pressuremeter and a pavement pressuremeter. Triaxial tests were also carried out on the sand samples. Results indicate that proximity of g o u r d surface has no significant influence on the small strain deformation of the soil. The pressuremeter mcduli varied with depth, but seemed not to be due to a critical depth phenomenon, unlike the limit pressure.
8210~3 PERMANENT DISPLACEMENTS DUE TO CYCLIC WAVE LOADING Mart, W A; Christian, J T J Geotech E~6ng Div ASCE, V107, NGTS, Aug !~81, PI129-1149 Describes triaxial cQmpression tests on samples from the Oosterechelde to see what affects permanent defurmations caused by cyclic loadimg. Influencing factors were found to be purosity, initial shear and effective ncrmal stresses, and the number of icedimg cycles, and these were combined in a logarithmic relation. Describes the incorporation of this relation into a finite element program, and the apDlication cf the program to the Oosterschelde barrier; It was found from initial investigations that the magnitude and pattern of motions was sensitive to the distribution of load between static amd cyclic loading.
821o~ DEI~2%MINATION OF POISSON'S RATIO FOR ROCK THROUGH THE POINT LOAD TEST WiJk, G Swedish Detonic Research Foundation repurt DS 1980:18, 16 Dec 1980, 15P Poisson's ratio fur a rock material can be determined by comparing the Point Load Test stremgth indices far two different sample shapes if the rock material is isotroplc and linearly elastic all the way to fracture. One appropriate shape is a cylind~ of diameter d and length i = 2d compressed along a diameter at the middle of the cylizrlrical surface. Another appropriate shape is a cylirder of diameter D = 2d and length L = d c u ~ e s e e d along
the axis. Experimental results for Poisson's ratio determined in this manner do however yield considerably larger values than the conventional method with strain gauge measurements. Auth. Avail: The Fourdation, Bc~ 32058, S-126 Ii, Stockholm, Sweden
Physico-chemical properties See also: 821034 8 2 1 0 ~ ELECTRICAL PROPERTIES OF GRANITE WITH IMPLICATIONS FC~ THE LOWER CRUST 01boer% G R J Geophys Res, V86, NB2, i0 Feb 1981, P931-936 Concemtrates on the de electrical resistivity and concludes that this is dominantly controlled by the amount cf free water in the granite and the temperature. 821046 TH~%MAL STABILITY OF DOLC~ITE AT HIGH TEMPERATURES AND PRESSURES Goldsmith, J R J Geophys Res, V85, NB12, i0 Dec 1980, P 6 ~ 9 6954 The thermal decomposition ctu-ve of dolomite has been investigated in a piston-cyli~ler apparatus frc~ a point at 9kbar and i130C to 1450C. 8ZI047 EFFECT OF PRESSURE AND TEMPERATURE ON THE THERWAL PROP~RTIES OF A SALT AND A QUARTZ ~0NZ0N,'A'~: Durham, W B; Abey, A E Proc 22nd US Symposiu~ on Rock Mechanics, Cambridge, Mass, 29 Jure-2 July 1981, P79-84. Publ Cambridge, Mass: MIT, 1981 Measurements of thermal conductivity and diffusivity, ard linear expansion at varying temperatures amd pressures fur a domal salt ar~ a quartz monzonite are described. The results are then discussed in the context of previOUS results. The salt thermal properties showed no dependence on pressure, but are dependent on temperature. The quartz momzonite thermal properties were dependent on both temperature and pressure. The study relates to conditions in an unierground nuclear waste repository.
Permeability and capillarity 8210~8 ~ F ~ C T OF PORE PRESSURE AND CONFINING PRESSURE ON FRACTURE ~m~MEABILITY Walsh, J B Int J Rock Mech Min Sci, V18, NS, Oct 1981,
I~29-435 Reviews the thecmetical development of the subject includi~6 the concept of effective stress, and applies it to recently published data. 22 refs.
821o49 m~ECT OF PRESSURE AND STRESS ON W A T ~ TRANSPORT IN INTACT AND FRACTURED G A ~ O AND GRANITE Trimmer, D; Bonmer, B; Heard, H C J Geophys Res, V85,NB12, i0 Dec 1980, P7059-
7071
821041 RE-EXAMINATION OF ONE-POINT MEI~ODS OF LIQUID LIMIT D,.'z'a~IMI NATION NagaraJ, T S; Jayadeva, M S Geotechnlque, V31, N3, Sept 1981, I~13-425 One-point methods of liquid limit determination have a stromg scientific base derived from the uniqueness of flow lines that can be obtained on the basis of physico-chemical considerations~ Previous methods were formulated by a statistical analysis of data. A simple one-polnt cone penetrometer method is suggested t~pon critical exsmination of previous experimental data, amd compared with earlier methods. C ~ u t e d values from this method agree well with experiment.
8210~2 P R E S S U ~
TESTS AT VERY SHALKEW DEPTH Briaud, J L; ~ields, D H J Geotech E~gmg Div ASCE, V107, NC/~8, Aug 1981, P1023-1040
In pressuremeter tests there is a critical depth below which ~ o u m d surface deformation, due to expansion of the probe, is almost n o ~ i s t e n t . Prcximity of the ground surface therefure affects pressuremeter test results ard this is investigated especially in relation to a pressuremeter used in pavement design. Tests were carried out on sand at varying depth and density, and on a natural clsy deposit at depths UP to 3ft, using a standard pressuremeter and a pavement pressuremeter. Triaxial tests were also carried out on the sand samples. Results indicate that proximity of g o u r d surface has no significant influence on the small strain deformation of the soil. The pressuremeter mcduli varied with depth, but seemed not to be due to a critical depth phenomenon, unlike the limit pressure.
8210~3 PERMANENT DISPLACEMENTS DUE TO CYCLIC WAVE LOADING Mart, W A; Christian, J T J Geotech E~6ng Div ASCE, V107, NGTS, Aug !~81, PI129-1149 Describes triaxial cQmpression tests on samples from the Oosterechelde to see what affects permanent defurmations caused by cyclic loadimg. Influencing factors were found to be purosity, initial shear and effective ncrmal stresses, and the number of icedimg cycles, and these were combined in a logarithmic relation. Describes the incorporation of this relation into a finite element program, and the apDlication cf the program to the Oosterschelde barrier; It was found from initial investigations that the magnitude and pattern of motions was sensitive to the distribution of load between static amd cyclic loading.
821o~ DEI~2%MINATION OF POISSON'S RATIO FOR ROCK THROUGH THE POINT LOAD TEST WiJk, G Swedish Detonic Research Foundation repurt DS 1980:18, 16 Dec 1980, 15P Poisson's ratio fur a rock material can be determined by comparing the Point Load Test stremgth indices far two different sample shapes if the rock material is isotroplc and linearly elastic all the way to fracture. One appropriate shape is a cylind~ of diameter d and length i = 2d compressed along a diameter at the middle of the cylizrlrical surface. Another appropriate shape is a cylirder of diameter D = 2d and length L = d c u ~ e s e e d along
the axis. Experimental results for Poisson's ratio determined in this manner do however yield considerably larger values than the conventional method with strain gauge measurements. Auth. Avail: The Fourdation, Bc~ 32058, S-126 Ii, Stockholm, Sweden
Physico-chemical properties See also: 821034 8 2 1 0 ~ ELECTRICAL PROPERTIES OF GRANITE WITH IMPLICATIONS FC~ THE LOWER CRUST 01boer% G R J Geophys Res, V86, NB2, i0 Feb 1981, P931-936 Concemtrates on the de electrical resistivity and concludes that this is dominantly controlled by the amount cf free water in the granite and the temperature. 821046 TH~%MAL STABILITY OF DOLC~ITE AT HIGH TEMPERATURES AND PRESSURES Goldsmith, J R J Geophys Res, V85, NB12, i0 Dec 1980, P 6 ~ 9 6954 The thermal decomposition ctu-ve of dolomite has been investigated in a piston-cyli~ler apparatus frc~ a point at 9kbar and i130C to 1450C. 8ZI047 EFFECT OF PRESSURE AND TEMPERATURE ON THE THERWAL PROP~RTIES OF A SALT AND A QUARTZ ~0NZ0N,'A'~: Durham, W B; Abey, A E Proc 22nd US Symposiu~ on Rock Mechanics, Cambridge, Mass, 29 Jure-2 July 1981, P79-84. Publ Cambridge, Mass: MIT, 1981 Measurements of thermal conductivity and diffusivity, ard linear expansion at varying temperatures amd pressures fur a domal salt ar~ a quartz monzonite are described. The results are then discussed in the context of previOUS results. The salt thermal properties showed no dependence on pressure, but are dependent on temperature. The quartz momzonite thermal properties were dependent on both temperature and pressure. The study relates to conditions in an unierground nuclear waste repository.
Permeability and capillarity 8210~8 ~ F ~ C T OF PORE PRESSURE AND CONFINING PRESSURE ON FRACTURE ~m~MEABILITY Walsh, J B Int J Rock Mech Min Sci, V18, NS, Oct 1981,
I~29-435 Reviews the thecmetical development of the subject includi~6 the concept of effective stress, and applies it to recently published data. 22 refs.
821o49 m~ECT OF PRESSURE AND STRESS ON W A T ~ TRANSPORT IN INTACT AND FRACTURED G A ~ O AND GRANITE Trimmer, D; Bonmer, B; Heard, H C J Geophys Res, V85,NB12, i0 Dec 1980, P7059-
7071