...) basically consists of adding two inclined notches in the test specimen of the DST. An ideal geometry was proposed based on numerical analysis and experimental tests on concrete. Experimental tests on homogeneous rocks, for low normal stresses, were performed with the ideal geometry, and it was obtained...

... of interfaces, including clay-geomembrane interfaces for which large displacements are important. The most recent application of the LDSB was to study the response of several sand-to-concrete interfaces under complex loading paths. In this application, the relevant characteristics of the LDSB are its geometry...

... of the testing was carried out on a natural anisotropic banded sandstone; however, a set of control specimens of sand concrete were tested in order to consider the credibility of the methodology. The methodology has been implemented to consider possible differences in the response of both materials...

...A Ata; M O'Neill The aim of the present study was to improve understanding of the interaction of drilled shaft concrete, polymer slurry (used to stabilize boreholes during construction of the drilled shaft), and the foundation soil. Interface shear tests were performed in the laboratory...

...-shear Behaviour of Concrete-Sandstone Interfaces ,” Proceedings , 6th International Congress on Rock Mechanics , Montréal, Canada , Vol. 1 , A. A. Balkema , Rotterdam , pp. 467 - 470 . Saeb , S. and Amadei , B. , 1989 , “ Effect of Boundary Conditions on the Shear Behaviour...

...J-M Lin; M Sansalone The studies summarized in this paper and the following paper in this issue demonstrate that the impact-echo method can be used for integrity testing of concrete pipes, mine shaft liners, and tunnel liners in contact with soil or rock. Results obtained from numerical (finite...

... that the measured impact-echo response depends upon the acoustic properties of the surrounding material as well as the acoustic properties and condition of the concrete structure. It is shown that cracks and voids in the concrete structure can be detected independent of the surrounding material. If the concrete...

... by dropping a steel bar can be used to evaluate in situ dynamic properties and, indirectly, in situ static properties of concrete and rock. A potential limitation of the noninstrumented bar is that the frequency of ringing (1770 to 10 070 Hz) is in the same frequency range that sensorineural hearing losses...

... recognizing the competency of construction materials testing laboratories to carry out specific tests on soils, asphalt cements, cutback asphalts, emulsified asphalts, bituminous concrete mixtures, concrete aggregates. AAP is structured to comply with ASTM Standards, Guide for Laboratory Accreditation Systems...

...RW Meier; H-Y Ko; S Sture A novel tensile loading apparatus is described, which when used in conjunction with an existing fluid-cushion cubical test cell, allows the simultaneous application of a pure principal tensile stress and transverse principal compressive stresses to concrete and rock...

..., concrete, rock, and wood is established. soil tests triaxial stress rocks concrete truly triaxial device ballast aggregate wood stress-strain behavior soil and rock mechanics References Sture , S. and Desai , C. S. , “ Fluid Cushion Truly Triaxial or Multiaxial Testing Device...

...S Kolias; RIT Williams This paper presents details of tests to evaluate the suitability of a double scissor friction grip system, initially developed for conventional concrete, for determining uniaxial tensile strength of cement-stabilized granular materials suitable for use in roadbase...