... of hardening in 80°C of distilled water fumes is between 33-47 GPa depending to the aggregate type. After this period, when 1N NaOH solution is applied and disintegration of experimental mortar bar starts, there is seen again rapid drop of Young modulus value, following quasi linear Young modulus decrease...

...) consists of a stiff four-columned load frame (1) with a screw-driven plunger (2). cycle cycle pressure 0 Upstream Oil & Gas testing procedure Reservoir Characterization Engineering structural geology mudstone disintegration MPa air breakage phenomenon diameter apparatus...

... was undertaken to attempt to determine the factors involved in breakdown. Several factors were believed to be responsible for decomposition and disintegration. These included swelling and shrinking of expanding lattice clays upon hydration and dehydration respectively; swelling and shrinking of certain zeolites...

... of some 500 m. Comparison of photos taken from known points year after year shows that the slope has dropped coherently more that 50 m in a circular slide of about 10 million cubic meters, with no significant disintegration. ZUSAMMENFASSUNG: Am Mount Friolin, der seit 1960 unter Beobachtung steht...

... Selbstabdichtung der Bohrung durch nachfallendes Gestein geschlossen werden. ABSTRACT: Laboratory investigations concerning the disintegration of mudstone samples from the North-German Lower Cretaceous as well as permeability test with disintegrating material were carried out to find out in how far unstable...

... or above which no further swelling occurs. 2.4 Disintegration of the Intact Rock Curve ® (fig. 2) can be approximated quite reasonably in the semi-logarithmic scale by a straight line for large stresses (crz~ 3 N/cm2). With further unloading thecurve becomes flatter until finally for com- plete unloading...

..., particularly that of durability (Deere and Gamble 1971; Olivier 1979). Rock durability is a significant time-dependent factor in the weathering and disintegration of mudrocks after exposure. The presence of rock types of a low durability can lead to construction problems in both underground and surface...

... in der technischen Praxis tatsächlich verwendet werden könnten. Summary The paper gives reasons for the methods of the physico-mechanical study concerning the process of disintegration of rocks, which has been carried out at our Institute, on the basis of the present knowledge of the given problems...

.... ft. (8 kg/sq. cm.), when the rock is decomposed, with some disintegration and softening and with considerable cracks allowed. Except for very large structures where pit excavations may be required to considerable depths to expose satisfactory exposure, the medium hard rock is usually expected...